diff --git a/src/game/bg.c b/src/game/bg.c
index 0b71bbdf4..2a3bab3dc 100644
--- a/src/game/bg.c
+++ b/src/game/bg.c
@@ -1604,7 +1604,7 @@ void bgReset(s32 stagenum)
 			// Copy 0x40 bytes from a random location in ROM to a random
 			// location in RAM. The write address can be anywhere in the
 			// boot segment or in the lib segment up to modelRenderNodeDl.
-			dmaExec((void *)(PHYS_TO_K0(0x1000) + (random() & 0x1fff8)), random() & 0x1fffe, 0x40);
+			dmaExec((void *)(PHYS_TO_K0(0x1000) + (rngRandom() & 0x1fff8)), rngRandom() & 0x1fffe, 0x40);
 		}
 	}
 #endif
diff --git a/src/game/body.c b/src/game/body.c
index 5d272d3d7..058f1e4a6 100644
--- a/src/game/body.c
+++ b/src/game/body.c
@@ -299,7 +299,7 @@ struct model *bodyAllocateModel(s32 bodynum, s32 headnum, u32 spawnflags)
 	if (spawnflags & SPAWNFLAG_FORCESUNGLASSES) {
 		sunglasses = true;
 	} else if (spawnflags & SPAWNFLAG_MAYBESUNGLASSES) {
-		sunglasses = random() % 2 == 0;
+		sunglasses = rngRandom() % 2 == 0;
 	}
 
 	if (spawnflags & SPAWNFLAG_FIXEDHEIGHT) {
@@ -325,7 +325,7 @@ s32 bodyChooseHead(s32 bodynum)
 			g_ActiveMaleHeadsIndex = 0;
 		}
 	} else if (bodynum == BODY_FEM_GUARD) {
-		head = g_FemGuardHeads[random() % 3];
+		head = g_FemGuardHeads[rngRandom() % 3];
 	} else {
 		head = g_ActiveFemaleHeads[g_ActiveFemaleHeadsIndex++];
 
@@ -493,10 +493,10 @@ void bodyAllocateChr(s32 stagenum, struct packedchr *packed, s32 cmdindex)
 			if (packed->tude != 4) {
 				chr->tude = packed->tude;
 			} else {
-				chr->tude = random() % 4;
+				chr->tude = rngRandom() % 4;
 			}
 
-			chr->voicebox = random() % 3;
+			chr->voicebox = rngRandom() % 3;
 
 			if (!g_HeadsAndBodies[chr->bodynum].ismale) {
 				chr->voicebox = VOICEBOX_FEMALE;
@@ -519,7 +519,7 @@ void bodyAllocateChr(s32 stagenum, struct packedchr *packed, s32 cmdindex)
 				chr->flags |= CHRFLAG0_AIVSAI;
 			}
 
-			if (random() % 5 == 0) {
+			if (rngRandom() % 5 == 0) {
 				// Make chr punch slower
 				chr->flags2 |= CHRFLAG1_ADJUSTPUNCHSPEED;
 			}
@@ -596,8 +596,8 @@ struct prop *bodyAllocateEyespy(struct pad *pad, RoomNum room)
 			chr->team = 0;
 			chr->squadron = 0;
 			chr->maxdamage = 2;
-			chr->tude = random() & 3;
-			chr->voicebox = random() % 3;
+			chr->tude = rngRandom() & 3;
+			chr->voicebox = rngRandom() % 3;
 			chr->naturalanim = 0;
 			chr->myspecial = 0;
 			chr->yvisang = 0;
diff --git a/src/game/bodyreset.c b/src/game/bodyreset.c
index 18b0a9973..0c98493db 100644
--- a/src/game/bodyreset.c
+++ b/src/game/bodyreset.c
@@ -26,7 +26,7 @@ void bodiesReset(s32 stagenum)
 		g_HeadsAndBodies[i].modeldef = NULL;
 	}
 
-	var80062c80 = random() % g_NumBondBodies;
+	var80062c80 = rngRandom() % g_NumBondBodies;
 	var80062b14 = 0;
 	var80062b18 = 0;
 
@@ -67,7 +67,7 @@ void bodiesReset(s32 stagenum)
 	for (i = 0; i < g_NumActiveHeadsPerGender; i++) {
 		do {
 			done = true;
-			g_ActiveMaleHeads[i] = headsavailablelist[random() % headsavailablelen];
+			g_ActiveMaleHeads[i] = headsavailablelist[rngRandom() % headsavailablelen];
 
 			if (headsavailablelen > g_NumActiveHeadsPerGender) {
 				for (j = 0; j < i; j++) {
@@ -97,7 +97,7 @@ void bodiesReset(s32 stagenum)
 	for (i = 0; i < g_NumActiveHeadsPerGender; i++) {
 		do {
 			done = true;
-			g_ActiveFemaleHeads[i] = headsavailablelist[random() % headsavailablelen];
+			g_ActiveFemaleHeads[i] = headsavailablelist[rngRandom() % headsavailablelen];
 
 			if (headsavailablelen > g_NumActiveHeadsPerGender) {
 				for (j = 0; j < i; j++) {
diff --git a/src/game/bondgun.c b/src/game/bondgun.c
index a42c1f734..96de5c52a 100644
--- a/src/game/bondgun.c
+++ b/src/game/bondgun.c
@@ -898,7 +898,7 @@ void bgunStartAnimation(struct guncmd *cmd, s32 handnum, struct hand *hand)
 	if (cmd->type != GUNCMD_PLAYANIMATION) {
 		struct guncmd *loopcmd = cmd;
 		s32 done = false;
-		u32 rand = random() % 100;
+		u32 rand = rngRandom() % 100;
 
 		while (loopcmd->type != GUNCMD_END) {
 			if (bgun0f098884(loopcmd, &hand->gset) && !done) {
@@ -7220,7 +7220,7 @@ void bgunUpdateMagnum(struct hand *hand, s32 handnum, struct modeldef *modeldef,
 
 	if (modeldef != NULL) {
 		for (i = 0; i < hand->unk0cc8_04; i++) {
-			struct modelnode *node = modelGetPart(modeldef, 0x0a + random() % 6);
+			struct modelnode *node = modelGetPart(modeldef, 0x0a + rngRandom() % 6);
 
 			if (node) {
 				s32 index = modelFindNodeMtxIndex(node, 0);
@@ -11264,8 +11264,8 @@ struct sndstate **bgunAllocateAudioHandle(void)
 void bgunPlayPropHitSound(struct gset *gset, struct prop *prop, s32 texturenum)
 {
 #if VERSION >= VERSION_NTSC_1_0
-	u32 rand1 = random();
-	u32 rand2 = random();
+	u32 rand1 = rngRandom();
+	u32 rand2 = rngRandom();
 	struct sndstate **handle;
 
 	if (g_Vars.lvupdate240 <= 0) {
@@ -11344,8 +11344,8 @@ void bgunPlayPropHitSound(struct gset *gset, struct prop *prop, s32 texturenum)
 			if (texturenum == 10000) {
 				soundnum = SFX_SHIELD_DAMAGE;
 			} else if (gset->weaponnum == WEAPON_LASER) {
-				if (gset->weaponfunc == FUNC_PRIMARY || ((gset->unk063a % 4) == 0 && (random() % 2))) {
-					if ((random() % 2) == 0) {
+				if (gset->weaponfunc == FUNC_PRIMARY || ((gset->unk063a % 4) == 0 && (rngRandom() % 2))) {
+					if ((rngRandom() % 2) == 0) {
 						soundnum = SFX_CLOAK_ON;
 					} else {
 						soundnum = SFX_CLOAK_OFF;
@@ -11409,8 +11409,8 @@ void bgunPlayPropHitSound(struct gset *gset, struct prop *prop, s32 texturenum)
 		}
 	}
 #else
-	u32 rand1 = random();
-	u32 rand2 = random();
+	u32 rand1 = rngRandom();
+	u32 rand2 = rngRandom();
 	struct sndstate **handle;
 
 	if (g_Vars.lvupdate240 <= 0) {
@@ -11483,7 +11483,7 @@ void bgunPlayPropHitSound(struct gset *gset, struct prop *prop, s32 texturenum)
 				soundnum = SFX_SHIELD_DAMAGE;
 			} else if (gset->weaponnum == WEAPON_LASER) {
 				if (gset->weaponfunc == FUNC_PRIMARY || (gset->unk063a % 8) == 0) {
-					if ((random() % 2) == 0) {
+					if ((rngRandom() % 2) == 0) {
 						soundnum = SFX_CLOAK_ON;
 					} else {
 						soundnum = SFX_CLOAK_OFF;
@@ -11561,8 +11561,8 @@ void bgunPlayBgHitSound(struct gset *gset, struct coord *hitpos, s32 texturenum,
 {
 #if VERSION >= VERSION_NTSC_1_0
 	struct sndstate **handle;
-	u32 rand1 = random();
-	u32 rand2 = random();
+	u32 rand1 = rngRandom();
+	u32 rand2 = rngRandom();
 	bool playdefault;
 	s16 soundnum;
 	bool overridden;
@@ -11585,7 +11585,7 @@ void bgunPlayBgHitSound(struct gset *gset, struct coord *hitpos, s32 texturenum,
 		if (gset->weaponnum == WEAPON_LASER) {
 			playdefault = false;
 
-			if (gset->weaponfunc == FUNC_PRIMARY || ((gset->unk063a % 4) == 0 && (random() % 2))) {
+			if (gset->weaponfunc == FUNC_PRIMARY || ((gset->unk063a % 4) == 0 && (rngRandom() % 2))) {
 				// Laser sounds
 				s16 sounds[] = {SFX_CLOAK_ON, SFX_CLOAK_OFF};
 				soundnum = sounds[rand1 % ARRAYCOUNT(sounds)];
@@ -11660,8 +11660,8 @@ void bgunPlayBgHitSound(struct gset *gset, struct coord *hitpos, s32 texturenum,
 	}
 #else
 	struct sndstate **handle;
-	u32 rand1 = random();
-	u32 rand2 = random();
+	u32 rand1 = rngRandom();
+	u32 rand2 = rngRandom();
 	s16 soundnum;
 	bool overridden;
 
diff --git a/src/game/bondmove.c b/src/game/bondmove.c
index cc02f32e1..31b9e9be7 100644
--- a/src/game/bondmove.c
+++ b/src/game/bondmove.c
@@ -2691,7 +2691,7 @@ void bmoveUpdateHead(f32 arg0, f32 arg1, f32 arg2, Mtxf *arg3, f32 arg4)
 		}
 	} else {
 		if (g_Vars.currentplayer->startnewbonddie) {
-			bheadStartDeathAnimation(g_DeathAnimations[random() % g_NumDeathAnimations], random() % 2, 0, 1);
+			bheadStartDeathAnimation(g_DeathAnimations[rngRandom() % g_NumDeathAnimations], rngRandom() % 2, 0, 1);
 			g_Vars.currentplayer->startnewbonddie = false;
 		}
 
diff --git a/src/game/bondview.c b/src/game/bondview.c
index af101fa37..13bf75af2 100644
--- a/src/game/bondview.c
+++ b/src/game/bondview.c
@@ -335,7 +335,7 @@ Gfx *bviewDrawStatic(Gfx *gdl, u32 arg1, s32 arg2)
 	s32 viewheight = viGetViewHeight();
 	s32 viewwidth = viGetViewWidth();
 	s32 viewleft = viGetViewLeft();
-	u16 *fb2 = (u16 *) PHYS_TO_K0(random() & 0xfff00);
+	u16 *fb2 = (u16 *) PHYS_TO_K0(rngRandom() & 0xfff00);
 	s32 y;
 
 	gDPPipeSync(gdl++);
@@ -344,7 +344,7 @@ Gfx *bviewDrawStatic(Gfx *gdl, u32 arg1, s32 arg2)
 
 #ifdef PLATFORM_N64
 	for (y = viewtop; y < viewtop + viewheight; y++) {
-		gdl = bviewCopyPixels(gdl, fb2, random() % 240, 5, y, 1.0f, viewleft, viewwidth);
+		gdl = bviewCopyPixels(gdl, fb2, rngRandom() % 240, 5, y, 1.0f, viewleft, viewwidth);
 	}
 #else
 	gDPSetCombineLERP(gdl++,
@@ -468,8 +468,8 @@ Gfx *bviewDrawFilmInterlace(Gfx *gdl, u32 colour, u32 alpha)
 			}
 		}
 
-		if (random() % 20 == 1) {
-			tmpy = random() % 200;
+		if (rngRandom() % 20 == 1) {
+			tmpy = rngRandom() % 200;
 		}
 
 		gdl = bviewCopyPixels(gdl, fb, tmpy, 5, y, 1, viewleft, viewwidth);
@@ -490,8 +490,8 @@ Gfx *bviewDrawFilmInterlace(Gfx *gdl, u32 colour, u32 alpha)
 			}
 		}
 
-		if (random() % 20 == 1) {
-			tmpy += random() % 200;
+		if (rngRandom() % 20 == 1) {
+			tmpy += rngRandom() % 200;
 		}
 
 		gDPFillRectangle(gdl++, viewleft, tmpy, viewleft + viewwidth, tmpy + 1);
@@ -762,9 +762,9 @@ Gfx *bviewDrawFisheye(Gfx *gdl, u32 colour, u32 alpha, s32 shuttertime60, s8 sta
 
 		for (i = viewtop; i < viewtop + viewheight; i++) {
 			if (hit == EYESPYHIT_DAMAGE) {
-				alpha2 = (random() % 120) + 120;
+				alpha2 = (rngRandom() % 120) + 120;
 				colour = 0xff333300 | (alpha2 & 0xff);
-				f22 = ((random() % 32) + (f32) FBALLOC_HEIGHT) * (1.0f / 256.0f);
+				f22 = ((rngRandom() % 32) + (f32) FBALLOC_HEIGHT) * (1.0f / 256.0f);
 
 				gDPSetEnvColorViaWord(gdl++, colour);
 			} else {
@@ -2163,7 +2163,7 @@ Gfx *bviewDrawNvLens(Gfx *gdl)
 		u8 green;
 
 		if (((var8007f878 & 1) != (y & 1)) != 0) {
-			u8 tmp = random() % 12;
+			u8 tmp = rngRandom() % 12;
 			green = 0xff - tmp;
 		} else {
 			green = 0x94;
@@ -2181,7 +2181,7 @@ Gfx *bviewDrawNvLens(Gfx *gdl)
 		u8 green;
 
 		if (((var8007f878 & 1) != (y & 1)) != 0) {
-			u8 tmp = random() % 12;
+			u8 tmp = rngRandom() % 12;
 			green = 0xff - tmp;
 		} else {
 			green = 0x94;
@@ -2363,7 +2363,7 @@ Gfx *bviewDrawIrLens(Gfx *gdl)
 		}
 #endif
 
-		red += random() % 8;
+		red += rngRandom() % 8;
 
 		if (red > 255) {
 			red = 255;
diff --git a/src/game/bondwalk.c b/src/game/bondwalk.c
index 1d0853c06..78960fdb3 100644
--- a/src/game/bondwalk.c
+++ b/src/game/bondwalk.c
@@ -1132,7 +1132,7 @@ void bwalkUpdateVertical(void)
 					SFX_JO_LANDING_05B7
 				};
 
-				psCreate(NULL, g_Vars.currentplayer->prop, sounds[random() % 3],
+				psCreate(NULL, g_Vars.currentplayer->prop, sounds[rngRandom() % 3],
 						-1, -1, PSFLAG_0400 | PSFLAG_IGNOREROOMS, 0, PSTYPE_NONE, 0, -1, NULL, -1, -1, -1, -1);
 			}
 		}
diff --git a/src/game/bot.c b/src/game/bot.c
index 2f087092f..3f4334d59 100644
--- a/src/game/bot.c
+++ b/src/game/bot.c
@@ -185,13 +185,13 @@ void botReset(struct chrdata *chr, u8 respawning)
 
 			aibot->waypoints[0] = NULL;
 			aibot->numwaystepstotarget = 0;
-			aibot->random1 = random();
+			aibot->random1 = rngRandom();
 			aibot->random1ttl60 = 0;
 			aibot->targetcloaktimer60 = 0;
 			aibot->canseecloaked = 0;
 			aibot->rcpcloaktimer60 = 0;
 			aibot->random2ttl60 = 0;
-			aibot->random2 = random();
+			aibot->random2 = rngRandom();
 			aibot->randomfrac = RANDOMFRAC();
 			aibot->cheap = 0;
 
@@ -1417,8 +1417,8 @@ void bot0f192a74(struct chrdata *chr)
 	aibot->random3ttl60 -= g_Vars.lvupdate60;
 
 	if (aibot->random3ttl60 <= 0) {
-		aibot->random3 = random();
-		aibot->random3ttl60 = TICKS(20) + random() % TICKS(20);
+		aibot->random3 = rngRandom();
+		aibot->random3ttl60 = TICKS(20) + rngRandom() % TICKS(20);
 	}
 
 	if (g_Vars.lvupdate240 > 0) {
@@ -1559,7 +1559,7 @@ void botChooseGeneralTarget(struct chrdata *botchr)
 		// However, the usage of canseecloaked appears to be botched.
 		// It is implemented in botIsTargetInvisible, but that function is not
 		// called here while canseecloaked is true.
-		if (random() % TICKS(4 * 60 * 60) < g_MpNumChrs * g_Vars.lvupdate60) {
+		if (rngRandom() % TICKS(4 * 60 * 60) < g_MpNumChrs * g_Vars.lvupdate60) {
 			aibot->canseecloaked = true;
 		}
 
@@ -1754,7 +1754,7 @@ s32 botFindTeammateToFollow(struct chrdata *chr, f32 range)
 
 	if ((g_MpSetup.options & MPOPTION_TEAMSENABLED)
 			&& chr->myaction != MA_AIBOTFOLLOW
-			&& (random() % 100) < chr->aibot->followchance) {
+			&& (rngRandom() % 100) < chr->aibot->followchance) {
 		f32 closestdistance = 0;
 		s32 closestplayernum = -1;
 		s32 i;
@@ -1892,8 +1892,8 @@ struct prop *botFindPickup(struct chrdata *chr, s32 criteria)
 
 					for (i = 0; i < ARRAYCOUNT(weaponnums); i++) {
 						if (weaponnums[i] > WEAPON_UNARMED && weaponnums[i] == weapon->weaponnum) {
-							if (random() % 16) {
-								if (weapproplist[i] == NULL || sqdist1 < weapdistlist[i] || random() % 16 == 0) {
+							if (rngRandom() % 16) {
+								if (weapproplist[i] == NULL || sqdist1 < weapdistlist[i] || rngRandom() % 16 == 0) {
 									weapproplist[i] = prop;
 									weapdistlist[i] = sqdist1;
 								}
@@ -1904,8 +1904,8 @@ struct prop *botFindPickup(struct chrdata *chr, s32 criteria)
 
 					ammotype = botactGetAmmoTypeByFunction(weapon->weaponnum, FUNC_PRIMARY);
 
-					if (ammotype > 0 && random() % 16) {
-						if (ammoproplist[ammotype] == NULL || sqdist1 < ammodistlist[ammotype] || random() % 16 == 0) {
+					if (ammotype > 0 && rngRandom() % 16) {
+						if (ammoproplist[ammotype] == NULL || sqdist1 < ammodistlist[ammotype] || rngRandom() % 16 == 0) {
 							ammoproplist[ammotype] = prop;
 							ammodistlist[ammotype] = sqdist1;
 						}
@@ -1928,8 +1928,8 @@ struct prop *botFindPickup(struct chrdata *chr, s32 criteria)
 								if (weaponnum > 0) {
 									for (j = 0; j < ARRAYCOUNT(weaponnums); j++) {
 										if (weaponnums[j] > WEAPON_UNARMED && weaponnum == weaponnums[j]) {
-											if (random() % 16) {
-												if (weapproplist[j] == NULL || sqdist2 < weapdistlist[j] || random() % 16 == 0) {
+											if (rngRandom() % 16) {
+												if (weapproplist[j] == NULL || sqdist2 < weapdistlist[j] || rngRandom() % 16 == 0) {
 													weapproplist[j] = prop;
 													weapdistlist[j] = sqdist2;
 												}
@@ -1939,8 +1939,8 @@ struct prop *botFindPickup(struct chrdata *chr, s32 criteria)
 									}
 								}
 
-								if (random() % 16) {
-									if (ammoproplist[ammotype] == NULL || sqdist2 < ammodistlist[ammotype] || random() % 16 == 0) {
+								if (rngRandom() % 16) {
+									if (ammoproplist[ammotype] == NULL || sqdist2 < ammodistlist[ammotype] || rngRandom() % 16 == 0) {
 										ammoproplist[ammotype] = prop;
 										ammodistlist[ammotype] = sqdist2;
 									}
@@ -1952,11 +1952,11 @@ struct prop *botFindPickup(struct chrdata *chr, s32 criteria)
 							if (weaponnums[i] == WEAPON_MPSHIELD) {
 								sqdist2 = chrGetSquaredDistanceToCoord(chr, &prop->pos);
 
-								if (random() % 16 == 0) {
+								if (rngRandom() % 16 == 0) {
 									break;
 								}
 
-								if (weapproplist[i] == NULL || sqdist2 < weapdistlist[i] || random() % 16 == 0) {
+								if (weapproplist[i] == NULL || sqdist2 < weapdistlist[i] || rngRandom() % 16 == 0) {
 									weapproplist[i] = prop;
 									weapdistlist[i] = sqdist2;
 								}
@@ -2407,8 +2407,8 @@ void botTickUnpaused(struct chrdata *chr)
 		aibot->random2ttl60 -= g_Vars.lvupdate60;
 
 		if (aibot->random2ttl60 < 0) {
-			aibot->random2ttl60 = TICKS(1800) + random() % TICKS(60 * 240);
-			aibot->random2 = random();
+			aibot->random2ttl60 = TICKS(1800) + rngRandom() % TICKS(60 * 240);
+			aibot->random2 = rngRandom();
 			aibot->randomfrac = RANDOMFRAC();
 		}
 
@@ -2539,7 +2539,7 @@ void botTickUnpaused(struct chrdata *chr)
 				if (g_MpSetup.scenario == MPSCENARIO_HOLDTHEBRIEFCASE) {
 					s32 numgetting = botGetCountInTeamDoingCommand(chr, AIBOTCMD_GETCASE2, false);
 
-					if (numgetting <= 0 || (numgetting < (teamsize + 1) / 2 || random() % 100 < 66)) {
+					if (numgetting <= 0 || (numgetting < (teamsize + 1) / 2 || rngRandom() % 100 < 66)) {
 						botApplyScenarioCommand(chr, AIBOTCMD_GETCASE2);
 					} else {
 						botApplyScenarioCommand(chr, AIBOTCMD_NORMAL);
@@ -2547,7 +2547,7 @@ void botTickUnpaused(struct chrdata *chr)
 				} else if (g_MpSetup.scenario == MPSCENARIO_HACKERCENTRAL) {
 					s32 numbots = botGetCountInTeamDoingCommand(chr, AIBOTCMD_DOWNLOAD, false);
 
-					if (aibot->hasuplink || numbots <= 0 || (numbots < (teamsize + 1) / 2 || random() % 100 < 50)) {
+					if (aibot->hasuplink || numbots <= 0 || (numbots < (teamsize + 1) / 2 || rngRandom() % 100 < 50)) {
 						botApplyScenarioCommand(chr, AIBOTCMD_DOWNLOAD);
 					} else {
 						botApplyScenarioCommand(chr, AIBOTCMD_NORMAL);
@@ -2555,7 +2555,7 @@ void botTickUnpaused(struct chrdata *chr)
 				} else if (g_MpSetup.scenario == MPSCENARIO_POPACAP) {
 					s32 numchasing = botGetCountInTeamDoingCommand(chr, AIBOTCMD_POPCAP, false);
 
-					if (numchasing <= 0 || numchasing < (teamsize + 1) / 2 || random() % 100 < 50) {
+					if (numchasing <= 0 || numchasing < (teamsize + 1) / 2 || rngRandom() % 100 < 50) {
 						botApplyScenarioCommand(chr, AIBOTCMD_POPCAP);
 					} else {
 						botApplyScenarioCommand(chr, AIBOTCMD_NORMAL);
@@ -2571,7 +2571,7 @@ void botTickUnpaused(struct chrdata *chr)
 					if (numinhill <= 0 || numinhill < teamsize / 2) {
 						botApplyScenarioCommand(chr, AIBOTCMD_HOLDHILL);
 					} else if (numinhill > botGetNumOpponentsInHill(chr)) {
-						if (random() % 100 < 50) {
+						if (rngRandom() % 100 < 50) {
 							botApplyScenarioCommand(chr, AIBOTCMD_DEFHILL);
 						} else {
 							botApplyScenarioCommand(chr, AIBOTCMD_NORMAL);
@@ -2587,13 +2587,13 @@ void botTickUnpaused(struct chrdata *chr)
 						if (botShouldReturnCtcToken(chr)) {
 							botApplyScenarioCommand(chr, AIBOTCMD_GETCASE);
 						} else if (botIsChrsCtcTokenHeld(chr)) {
-							if (random() % 100 < 30) {
+							if (rngRandom() % 100 < 30) {
 								botApplyScenarioCommand(chr, AIBOTCMD_GETCASE);
 							} else {
 								botApplyScenarioCommand(chr, AIBOTCMD_SAVECASE);
 							}
 						} else {
-							if (random() % 100 < 70 || numgetting <= 0) {
+							if (rngRandom() % 100 < 70 || numgetting <= 0) {
 								botApplyScenarioCommand(chr, AIBOTCMD_GETCASE);
 							} else {
 								botApplyScenarioCommand(chr, AIBOTCMD_SAVECASE);
@@ -2607,7 +2607,7 @@ void botTickUnpaused(struct chrdata *chr)
 						if (botShouldReturnCtcToken(chr)) {
 							botApplyScenarioCommand(chr, AIBOTCMD_GETCASE);
 						} else if (botIsChrsCtcTokenHeld(chr)) {
-							if (numsaving <= 0 || random() % 100 < 70) {
+							if (numsaving <= 0 || rngRandom() % 100 < 70) {
 								botApplyScenarioCommand(chr, AIBOTCMD_SAVECASE);
 							} else {
 								botApplyScenarioCommand(chr, AIBOTCMD_GETCASE);
@@ -2616,9 +2616,9 @@ void botTickUnpaused(struct chrdata *chr)
 							botApplyScenarioCommand(chr, AIBOTCMD_GETCASE);
 						} else if (numsaving <= 0 || numsaving < teamsize / 4) {
 							botApplyScenarioCommand(chr, AIBOTCMD_SAVECASE);
-						} else if (random() % 100 < 30) {
+						} else if (rngRandom() % 100 < 30) {
 							botApplyScenarioCommand(chr, AIBOTCMD_GETCASE);
-						} else if (random() % 100 < 30) {
+						} else if (rngRandom() % 100 < 30) {
 							botApplyScenarioCommand(chr, AIBOTCMD_SAVECASE);
 						} else {
 							botApplyScenarioCommand(chr, AIBOTCMD_NORMAL);
@@ -2627,7 +2627,7 @@ void botTickUnpaused(struct chrdata *chr)
 				}
 
 				// Consider changing command in 20 to 60 seconds
-				aibot->commandtimer60 = TICKS(1200) + random() % TICKS(2400);
+				aibot->commandtimer60 = TICKS(1200) + rngRandom() % TICKS(2400);
 			}
 		}
 
@@ -2724,7 +2724,7 @@ void botTickUnpaused(struct chrdata *chr)
 							s32 index;
 							s32 i;
 
-							index = random() % numtokens;
+							index = rngRandom() % numtokens;
 
 							i = (index + 1) % numtokens;
 
@@ -2752,7 +2752,7 @@ void botTickUnpaused(struct chrdata *chr)
 								aibot->gotoprop = tokens[index];
 							} else if (botCanFollow(chr, tokens[index]->chr)) {
 								newaction = MA_AIBOTFOLLOW;
-								aibot->canbreakfollow = random() % 4 == 0;
+								aibot->canbreakfollow = rngRandom() % 4 == 0;
 								aibot->followingplayernum = mpPlayerGetIndex(tokens[index]->chr);
 							}
 						}
@@ -2770,7 +2770,7 @@ void botTickUnpaused(struct chrdata *chr)
 								// Held by a teammate - follow/protect them
 								if (botCanFollow(chr, tokenchr)) {
 									newaction = MA_AIBOTFOLLOW;
-									aibot->canbreakfollow = random() % 4 == 0;
+									aibot->canbreakfollow = rngRandom() % 4 == 0;
 									aibot->followingplayernum = mpPlayerGetIndex(tokenchr);
 								}
 							} else {
@@ -2860,7 +2860,7 @@ void botTickUnpaused(struct chrdata *chr)
 								// Uplink is held by teammate - protect them
 								if (botCanFollow(chr, uplinkchr)) {
 									newaction = MA_AIBOTFOLLOW;
-									aibot->canbreakfollow = random() % 4 == 0;
+									aibot->canbreakfollow = rngRandom() % 4 == 0;
 									aibot->followingplayernum = mpPlayerGetIndex(uplinkchr);
 								}
 							} else {
@@ -2891,7 +2891,7 @@ void botTickUnpaused(struct chrdata *chr)
 								// Briefcase is held by teammate - protect them
 								if (botCanFollow(chr, tokenchr)) {
 									newaction = MA_AIBOTFOLLOW;
-									aibot->canbreakfollow = random() % 4 == 0;
+									aibot->canbreakfollow = rngRandom() % 4 == 0;
 									aibot->followingplayernum = mpPlayerGetIndex(tokenchr);
 								}
 							} else if (!botIsTargetInvisible(chr, tokenchr) && botPassesCowardCheck(chr, tokenchr)) {
@@ -2919,7 +2919,7 @@ void botTickUnpaused(struct chrdata *chr)
 								// Victim is a teammate - protect them
 								if (botCanFollow(chr, victimchr)) {
 									newaction = MA_AIBOTFOLLOW;
-									aibot->canbreakfollow = random() % 4 == 0;
+									aibot->canbreakfollow = rngRandom() % 4 == 0;
 									aibot->followingplayernum = mpPlayerGetIndex(victimchr);
 								}
 							} else {
@@ -2944,13 +2944,13 @@ void botTickUnpaused(struct chrdata *chr)
 						// Current bot has the briefcase - follow a teammate for protection
 						s32 playernum = -1;
 
-						if (random() % 100 < 66) {
+						if (rngRandom() % 100 < 66) {
 							playernum = botFindTeammateToFollow(chr, 100000);
 						}
 
 						if (playernum >= 0) {
 							newaction = MA_AIBOTFOLLOW;
-							aibot->canbreakfollow = random() % 4 == 0;
+							aibot->canbreakfollow = rngRandom() % 4 == 0;
 							aibot->followingplayernum = playernum;
 						}
 					}
@@ -2962,13 +2962,13 @@ void botTickUnpaused(struct chrdata *chr)
 							// Current bot is the victim - follow a teammate for protection
 							s32 playernum = -1;
 
-							if (random() % 100 < 66) {
+							if (rngRandom() % 100 < 66) {
 								playernum = botFindTeammateToFollow(chr, 100000);
 							}
 
 							if (playernum >= 0) {
 								newaction = MA_AIBOTFOLLOW;
-								aibot->canbreakfollow = random() % 4 == 0;
+								aibot->canbreakfollow = rngRandom() % 4 == 0;
 								aibot->followingplayernum = playernum;
 							}
 						}
@@ -3095,7 +3095,7 @@ void botTickUnpaused(struct chrdata *chr)
 
 				if (playernum >= 0) {
 					newaction = MA_AIBOTFOLLOW;
-					aibot->canbreakfollow = random() % 4 == 0;
+					aibot->canbreakfollow = rngRandom() % 4 == 0;
 					aibot->followingplayernum = playernum;
 				}
 			}
@@ -3435,7 +3435,7 @@ void botTickUnpaused(struct chrdata *chr)
 												aibot->punchtimer60[0] = TICKS(30);
 											}
 
-											if (random() % 3 == 0) {
+											if (rngRandom() % 3 == 0) {
 												aibot->punchtimer60[1] = aibot->punchtimer60[0] - TICKS(20);
 											}
 											break;
diff --git a/src/game/botact.c b/src/game/botact.c
index c2aa48cd4..fcaeebb6a 100644
--- a/src/game/botact.c
+++ b/src/game/botact.c
@@ -223,7 +223,7 @@ bool botactShootFarsight(struct chrdata *chr, s32 arg1, struct coord *vector, st
 	aibot = chr->aibot;
 
 	if (aibot->weaponnum == WEAPON_FARSIGHT) {
-		rand = random() % 100;
+		rand = rngRandom() % 100;
 
 		// 3 in 10 chance of this passing
 		if (rand < 30) {
diff --git a/src/game/botcmd.c b/src/game/botcmd.c
index eaf9d341d..57f8a4a4e 100644
--- a/src/game/botcmd.c
+++ b/src/game/botcmd.c
@@ -149,7 +149,7 @@ void botcmdTickDistMode(struct chrdata *chr)
 		if (!insight) {
 			newmode = BOTDISTMODE_ADVANCE;
 			aibot->distoverrideprop = targetprop;
-			aibot->distoverridetimer60 = TICKS(20) + (random() % TICKS(120));
+			aibot->distoverridetimer60 = TICKS(20) + (rngRandom() % TICKS(120));
 		} else if (aibot->distoverrideprop) {
 			if (g_Vars.lvupdate60 < aibot->distoverridetimer60) {
 				aibot->distoverridetimer60 -= g_Vars.lvupdate60;
diff --git a/src/game/botinv.c b/src/game/botinv.c
index 7bb773378..82eb82bf5 100644
--- a/src/game/botinv.c
+++ b/src/game/botinv.c
@@ -904,7 +904,7 @@ void botinvTick(struct chrdata *chr)
 	aibot->dampensuicidesttl60 -= g_Vars.lvupdate60;
 
 	if (aibot->dampensuicidesttl60 < 0) {
-		aibot->dampensuicidesttl60 = TICKS(3600) + random() % TICKS(60);
+		aibot->dampensuicidesttl60 = TICKS(3600) + rngRandom() % TICKS(60);
 
 		for (i = 0; i < ARRAYCOUNT(aibot->suicidesbygunfunc); i++) {
 			aibot->suicidesbygunfunc[i][0] *= 0.9f;
@@ -916,15 +916,15 @@ void botinvTick(struct chrdata *chr)
 	aibot->equipextrascorestimer60 -= g_Vars.lvupdate60;
 
 	if (aibot->equipextrascorestimer60 < 0) {
-		aibot->equipextrascorestimer60 = TICKS(600) + random() % TICKS(3000);
+		aibot->equipextrascorestimer60 = TICKS(600) + rngRandom() % TICKS(3000);
 
 		for (i = 0; i < ARRAYCOUNT(aibot->equipextrascores); i++) {
 			if (aibot->config->difficulty == BOTDIFF_MEAT) {
-				aibot->equipextrascores[i] = random() % 200 - 100; // -100 to +100
+				aibot->equipextrascores[i] = rngRandom() % 200 - 100; // -100 to +100
 			} else if (aibot->config->difficulty == BOTDIFF_EASY) {
-				aibot->equipextrascores[i] = random() % 100 - 50; // -50 to +50
+				aibot->equipextrascores[i] = rngRandom() % 100 - 50; // -50 to +50
 			} else {
-				aibot->equipextrascores[i] = random() % 30 - 15; // -15 to +15
+				aibot->equipextrascores[i] = rngRandom() % 30 - 15; // -15 to +15
 			}
 		}
 	}
@@ -934,8 +934,8 @@ void botinvTick(struct chrdata *chr)
 	aibot->random1ttl60 -= g_Vars.lvupdate60;
 
 	if (aibot->random1ttl60 < 0) {
-		aibot->random1ttl60 = TICKS(120) + random() % TICKS(600);
-		aibot->random1 = random();
+		aibot->random1ttl60 = TICKS(120) + rngRandom() % TICKS(600);
+		aibot->random1 = rngRandom();
 	}
 
 	if (aibot->cyclonedischarging[HAND_LEFT] == 0
diff --git a/src/game/botmgr.c b/src/game/botmgr.c
index 59778fbff..d8fd489c4 100644
--- a/src/game/botmgr.c
+++ b/src/game/botmgr.c
@@ -85,7 +85,7 @@ void botmgrAllocateBot(s32 chrnum, s32 aibotnum)
 
 				if (aibot != NULL) {
 					chr->tude = 0;
-					chr->voicebox = random() % 3;
+					chr->voicebox = rngRandom() % 3;
 
 					if (g_HeadsAndBodies[chr->bodynum].ismale == false) {
 						chr->voicebox = VOICEBOX_FEMALE;
@@ -235,7 +235,7 @@ void botmgrAllocateBot(s32 chrnum, s32 aibotnum)
 					aibot->realignangleframe = -1;
 					aibot->waypoints[0] = NULL;
 					aibot->numwaystepstotarget = 0;
-					aibot->random1 = random();
+					aibot->random1 = rngRandom();
 					aibot->random1ttl60 = 0;
 
 					for (i = 0; i < ARRAYCOUNT(aibot->killsbygunfunc); i++) {
@@ -258,7 +258,7 @@ void botmgrAllocateBot(s32 chrnum, s32 aibotnum)
 					aibot->canseecloaked = false;
 
 					aibot->random2ttl60 = 0;
-					aibot->random2 = random();
+					aibot->random2 = rngRandom();
 					aibot->randomfrac = RANDOMFRAC();
 					aibot->cheap = false;
 #if VERSION >= VERSION_NTSC_1_0
diff --git a/src/game/botroom.c b/src/game/botroom.c
index b27308f13..0db8b4cfb 100644
--- a/src/game/botroom.c
+++ b/src/game/botroom.c
@@ -135,7 +135,7 @@ bool botroomFindPos(RoomNum room, struct coord *pos, f32 *angleptr, s32 *padnump
 		return false;
 	}
 
-	i = random() % totalcount;
+	i = rngRandom() % totalcount;
 
 	if (i < covercount) {
 		coverUnpack(covernums[i], &cover);
diff --git a/src/game/camdraw.c b/src/game/camdraw.c
index ee9b25834..0579df090 100644
--- a/src/game/camdraw.c
+++ b/src/game/camdraw.c
@@ -317,7 +317,7 @@ void func0f149f18(void)
 
 	if (var800a45a0->unk470) {
 		for (i = 0; i < 0x4000; i++) {
-			var800a45a0->unk470[i] = random() % 255;
+			var800a45a0->unk470[i] = rngRandom() % 255;
 		}
 	}
 }
@@ -1066,13 +1066,13 @@ void func0f14b394(struct var8007f8e0 *arg0)
 	size = align32(func0f14c814(&arg0->unk004));
 
 	for (i = 0; i < size; i++) {
-		arg0->unk004.textureptr[i] = random() % 0xff;
+		arg0->unk004.textureptr[i] = rngRandom() % 0xff;
 	}
 
 	size = align32(func0f14c814(&arg0->unk010));
 
 	for (i = 0; i < size; i++) {
-		arg0->unk010.textureptr[i] = random() % 0xff;
+		arg0->unk010.textureptr[i] = rngRandom() % 0xff;
 	}
 
 	func0f14b228(arg0);
@@ -2358,7 +2358,7 @@ void func0f14e7e0(u8 *arg0)
 
 	for (i = 0; i < 128; i++) {
 		for (j = 0; j < 128; j++) {
-			arg0[i * 128 + j] = random() % 255;
+			arg0[i * 128 + j] = rngRandom() % 255;
 		}
 	}
 }
@@ -3151,7 +3151,7 @@ bool func0f15015c(s8 device, s32 filenum, u8 *arg2)
 		s32 size = 128;
 
 		for (i = 0; i < size; i++) {
-			arg2[i] = random();
+			arg2[i] = rngRandom();
 		}
 
 		return true;
diff --git a/src/game/chr.c b/src/game/chr.c
index 79dce823f..e42c78012 100644
--- a/src/game/chr.c
+++ b/src/game/chr.c
@@ -1216,7 +1216,7 @@ void chrInit(struct prop *prop, u8 *ailist)
 	chr->cmnum2 = 0;
 	chr->cmnum3 = 0;
 	chr->cmnum4 = 0;
-	chr->cmcount = random() % 300;
+	chr->cmcount = rngRandom() % 300;
 	chr->footstep = 0;
 	chr->magicanim = -1;
 	chr->cover = -1;
@@ -1283,7 +1283,7 @@ void chrInit(struct prop *prop, u8 *ailist)
 	chr->p1p2 = g_Vars.bondplayernum;
 	chr->lastattacker = NULL;
 	chr->race = RACE_HUMAN;
-	chr->aimtesttimer60 = random() % TICKS(30);
+	chr->aimtesttimer60 = rngRandom() % TICKS(30);
 	chr->lastfootsample = 0;
 	chr->poisoncounter = 0;
 	chr->poisonprop = NULL;
@@ -1522,7 +1522,7 @@ void chrFlinchBody(struct chrdata *chr)
 	if (chr->actiontype != ACT_DEAD && chr->flinchcnt < 0) {
 		chr->flinchcnt = 1;
 		chr->hidden2 &= 0x0fff;
-		chr->hidden2 |= (u16)(random() << 13);
+		chr->hidden2 |= (u16)(rngRandom() << 13);
 	}
 }
 
@@ -3683,7 +3683,7 @@ void chrEmitSparks(struct chrdata *chr, struct prop *prop, s32 hitpart, struct c
 		return;
 	}
 
-	if ((random() & 4) == 0) {
+	if ((rngRandom() & 4) == 0) {
 		struct coord coord3;
 		coord3.x = coord2->x * 42.0f + coord->x;
 		coord3.y = coord2->y * 42.0f + coord->y;
@@ -3712,7 +3712,7 @@ void chr0f0260c4(struct model *model, s32 hitpart, struct modelnode *node, struc
 	struct coord spd4;
 	struct coord spc8;
 	s32 spbc[3];
-	s32 alpha = 20 + (random() % 50);
+	s32 alpha = 20 + (rngRandom() % 50);
 	struct modelrodata_dl *rodata;
 	struct modelrwdata_dl *rwdata;
 	s32 spac = 0;
@@ -3997,7 +3997,7 @@ void chrBruise(struct model *model, s32 hitpart, struct modelnode *node, struct
 	struct coord spd4;
 	struct coord spc8;
 	s32 spbc[3];
-	s32 alpha = 20 + (random() % 50);
+	s32 alpha = 20 + (rngRandom() % 50);
 	struct modelrodata_dl *rodata;
 	struct modelrwdata_dl *rwdata;
 	s32 spac = 0;
@@ -4312,7 +4312,7 @@ void chrDisfigure(struct chrdata *chr, struct coord *exppos, f32 damageradius)
 	s32 i;
 	s32 j;
 
-	u32 rand = random();
+	u32 rand = rngRandom();
 
 	if (g_Vars.mplayerisrunning || !chrIsDead(chr)) {
 		return;
@@ -4718,7 +4718,7 @@ void chrHit(struct shotdata *shotdata, struct hit *hit)
 					type = g_SurfaceTypes[surfacetype];
 
 					if (type->numwallhittexes > 0) {
-						index = random() % type->numwallhittexes;
+						index = rngRandom() % type->numwallhittexes;
 
 						wallhitCreate(
 								&hit->hitthing.pos,
@@ -4754,7 +4754,7 @@ void chrHit(struct shotdata *shotdata, struct hit *hit)
 					type = g_SurfaceTypes[g_Textures[hit->hitthing.texturenum].surfacetype];
 				}
 
-				index = random() % type->numwallhittexes;
+				index = rngRandom() % type->numwallhittexes;
 
 				wallhitCreate(
 						&hit->hitthing.pos,
@@ -5201,7 +5201,7 @@ void shieldhitCreate(struct prop *prop, f32 shield, struct prop *arg2, struct mo
 			shieldhit->unk018[i] = -1;
 		}
 
-		shieldhit->unk011 = 2 + (random() % 6);
+		shieldhit->unk011 = 2 + (rngRandom() % 6);
 		shieldhit->shield = shield;
 
 		if (arg6) {
@@ -6505,7 +6505,7 @@ Gfx *chrRenderShield(Gfx *gdl, struct chrdata *chr, u32 alpha)
 			|| (chrGetShield(chr) > 0 && chr->cmcount < 10)
 			|| (chr->cloakfadefrac > 0 && !chr->cloakfadefinished)) {
 		if (chrGetShield(chr) > 0 && g_Vars.lvupdate240 > 0) {
-			s32 numiterations = (random() % 4) + 1;
+			s32 numiterations = (rngRandom() % 4) + 1;
 			s32 newcmnum = chr->cmnum2;
 			s32 candidate;
 			s8 operation = 0;
diff --git a/src/game/chraction.c b/src/game/chraction.c
index 1b59dccaa..7f8c3bca3 100644
--- a/src/game/chraction.c
+++ b/src/game/chraction.c
@@ -1683,7 +1683,7 @@ void chrChooseStandAnimation(struct chrdata *chr, f32 mergetime)
 		} else if ((leftgun && rightgun) || (!leftgun && !rightgun)
 				|| weaponIsOneHanded(leftgun)
 				|| weaponIsOneHanded(rightgun)) {
-			modelSetAnimation(chr->model, ANIM_006A, random() % 2, 0, 0.25, mergetime);
+			modelSetAnimation(chr->model, ANIM_006A, rngRandom() % 2, 0, 0.25, mergetime);
 			modelSetAnimLooping(chr->model, 0, 16);
 		} else if (rightgun || leftgun) {
 			modelSetAnimation(chr->model, ANIM_TWO_GUN_HOLD, leftgun != NULL, 0, 0.25, mergetime);
@@ -1691,7 +1691,7 @@ void chrChooseStandAnimation(struct chrdata *chr, f32 mergetime)
 			modelSetAnimEndFrame(chr->model, 120);
 		}
 	} else if (race == RACE_SKEDAR) {
-		modelSetAnimation(chr->model, ANIM_00C0, random() % 2, 0, 0.5, mergetime);
+		modelSetAnimation(chr->model, ANIM_00C0, rngRandom() % 2, 0, 0.5, mergetime);
 	} else if (race == RACE_DRCAROLL) {
 		modelSetAnimation(chr->model, ANIM_013E, 0, 0, 0.5, mergetime);
 	} else if (race == RACE_ROBOT) {
@@ -1712,7 +1712,7 @@ void func0f02e9a0(struct chrdata *chr, f32 mergetime)
 	chr->act_stand.reaim = 0;
 	chr->act_stand.turning = TURNSTATE_OFF;
 	chr->act_stand.checkfacingwall = false;
-	chr->act_stand.wallcount = random() % 120 + 180; // 180 to 299
+	chr->act_stand.wallcount = rngRandom() % 120 + 180; // 180 to 299
 	chr->act_stand.mergetime = mergetime;
 	chr->act_stand.playwalkanim = false;
 
@@ -1754,7 +1754,7 @@ void chrStand(struct chrdata *chr)
 			chr->act_stand.reaim = 0;
 			chr->act_stand.turning = TURNSTATE_OFF;
 			chr->act_stand.checkfacingwall = false;
-			chr->act_stand.wallcount = random() % 120 + 180;
+			chr->act_stand.wallcount = rngRandom() % 120 + 180;
 			chr->sleep = 0;
 			chr->act_stand.playwalkanim = false;
 
@@ -1779,7 +1779,7 @@ void chrStand(struct chrdata *chr)
 			chr->act_stand.reaim = 0;
 			chr->act_stand.turning = TURNSTATE_OFF;
 			chr->act_stand.checkfacingwall = false;
-			chr->act_stand.wallcount = random() % 120 + 180;
+			chr->act_stand.wallcount = rngRandom() % 120 + 180;
 			chr->sleep = 0;
 			chr->act_stand.playwalkanim = false;
 
@@ -1832,7 +1832,7 @@ void chrKneelChooseAnimation(struct chrdata *chr)
 				|| (!leftgun && !rightgun)
 				|| weaponIsOneHanded(leftgun)
 				|| weaponIsOneHanded(rightgun)) {
-			bool flip = random() % 2;
+			bool flip = rngRandom() % 2;
 			modelSetAnimation(chr->model, ANIM_KNEEL_SHOOT_RIGHT_HAND, flip, 0, chrGetRangedSpeed(chr, 0.5, 0.8), 16);
 			modelSetAnimEndFrame(chr->model, 28);
 		} else if (rightgun || leftgun) {
@@ -1865,7 +1865,7 @@ void chrStartAlarmChooseAnimation(struct chrdata *chr)
 	if (leftgun && !rightgun) {
 		flip = true;
 	} else if ((leftgun && rightgun) || (!leftgun && !rightgun)) {
-		flip = random() % 2;
+		flip = rngRandom() % 2;
 	}
 
 	modelSetAnimation(chr->model, ANIM_TALKING_003D, flip, 40, 1, 16);
@@ -1888,7 +1888,7 @@ void chrStartAlarm(struct chrdata *chr)
 
 void chrThrowGrenadeChooseAnimation(struct chrdata *chr)
 {
-	u32 rand = random();
+	u32 rand = rngRandom();
 
 	if (chr->act_throwgrenade.needsequip) {
 		if (rand % 3 == 0) {
@@ -1937,17 +1937,17 @@ void chrSurprisedChooseAnimation(struct chrdata *chr)
 		if (leftgun != NULL && rightgun == NULL) {
 			flip = 1;
 		} else if ((leftgun != NULL && rightgun != NULL) || (leftgun == NULL && rightgun == NULL)) {
-			flip = random() & 1;
+			flip = rngRandom() & 1;
 		}
 
 		modelSetAnimation(chr->model, ANIM_003F, flip, 10, chrGetRangedSpeed(chr, 0.6f, 0.96000003f), 16);
 		modelSetAnimEndFrame(chr->model, 52);
 	} else if (chr->act_surprised.type == 2) {
-		modelSetAnimation(chr->model, ANIM_SURRENDER_002E, random() & 1, 0, chrGetRangedSpeed(chr, 0.35f, 0.56f), 16);
+		modelSetAnimation(chr->model, ANIM_SURRENDER_002E, rngRandom() & 1, 0, chrGetRangedSpeed(chr, 0.35f, 0.56f), 16);
 		modelSetAnimEndFrame(chr->model, 7);
 	} else {
-		u32 part = random() % 3;
-		modelSetAnimation(chr->model, ANIM_0040, random() & 1, 17, 0.6f, 16);
+		u32 part = rngRandom() % 3;
+		modelSetAnimation(chr->model, ANIM_0040, rngRandom() & 1, 17, 0.6f, 16);
 
 		if (part == 0) {
 			modelSetAnimEndFrame(chr->model, chrGetRangedSpeed(chr, 38, 8));
@@ -2018,7 +2018,7 @@ void chrSurrenderChooseAnimation(struct chrdata *chr)
 	struct prop *rightgun = chrGetHeldProp(chr, HAND_RIGHT);
 
 	if (rightgun || leftgun) {
-		modelSetAnimation(chr->model, ANIM_SURRENDER_002F, random() & 1, 0, 0.5, 16);
+		modelSetAnimation(chr->model, ANIM_SURRENDER_002F, rngRandom() & 1, 0, 0.5, 16);
 		modelSetAnimLooping(chr->model, 40, 16);
 
 		if (leftgun) {
@@ -2031,7 +2031,7 @@ void chrSurrenderChooseAnimation(struct chrdata *chr)
 
 		chr->hidden |= CHRHFLAG_DROPPINGITEM;
 	} else {
-		modelSetAnimation(chr->model, ANIM_SURRENDER_002E, random() & 1, 0, 0.5, 16);
+		modelSetAnimation(chr->model, ANIM_SURRENDER_002E, rngRandom() & 1, 0, 0.5, 16);
 		modelSetAnimLooping(chr->model, 30, 16);
 	}
 
@@ -2065,14 +2065,14 @@ void chrSidestepChooseAnimation(struct chrdata *chr)
 	u32 race = CHRRACE(chr);
 
 	if (leftgun && rightgun) {
-		flip = random() % 2;
-		allowflip = random() % 2;
+		flip = rngRandom() % 2;
+		allowflip = rngRandom() % 2;
 	} else {
 		if (weaponIsOneHanded(leftgun) == false
 				&& weaponIsOneHanded(rightgun) == false
 				&& (leftgun || rightgun)) {
 			flip = (leftgun != 0);
-			allowflip = random() % 2;
+			allowflip = rngRandom() % 2;
 		}
 	}
 
@@ -2130,7 +2130,7 @@ void chrJumpOutChooseAnimation(struct chrdata *chr)
 		flip = true;
 	} else if ((leftgun && rightgun) || (!leftgun && !rightgun)
 			|| weaponIsOneHanded(leftgun) || weaponIsOneHanded(rightgun)) {
-		flip = random() % 2;
+		flip = rngRandom() % 2;
 	}
 
 	if ((chr->act_jumpout.side && !flip) || (chr->act_jumpout.side == 0 && flip)) {
@@ -2171,7 +2171,7 @@ void chrRunPosChooseAnimation(struct chrdata *chr)
 
 	if ((leftgun && rightgun) || (!leftgun && !rightgun)) {
 		heavy = false;
-		flip = random() % 2;
+		flip = rngRandom() % 2;
 	} else if (weaponIsOneHanded(leftgun) || weaponIsOneHanded(rightgun)) {
 		heavy = false;
 		flip = (bool)leftgun != false;
@@ -2241,9 +2241,9 @@ void chrAttackStand(struct chrdata *chr, u32 attackflags, s32 entityid)
 		struct prop *rightgun2 = chrGetHeldUsableProp(chr, HAND_RIGHT);
 
 		if (leftgun2 && rightgun2) {
-			flip = random() % 2;
+			flip = rngRandom() % 2;
 
-			if (random() % 3 == 0) {
+			if (rngRandom() % 3 == 0) {
 				animgroup = g_StandLightAttackAnims[race];
 				firing[HAND_LEFT] = flip;
 				firing[HAND_RIGHT] = !flip;
@@ -2311,9 +2311,9 @@ void chrAttackKneel(struct chrdata *chr, u32 attackflags, s32 entityid)
 		rightgun2 = chrGetHeldUsableProp(chr, HAND_RIGHT);
 
 		if (leftgun2 && rightgun2) {
-			flip = random() % 2;
+			flip = rngRandom() % 2;
 
-			if (random() % 3 == 0) {
+			if (rngRandom() % 3 == 0) {
 				animgroup = g_KneelLightAttackAnims[race];
 				firing[HAND_LEFT] = flip;
 				firing[HAND_RIGHT] = !flip;
@@ -2372,8 +2372,8 @@ void chrAttackWalk(struct chrdata *chr, bool run)
 		s32 style = 0;
 
 		if (leftgun2 && rightgun2) {
-			flip = random() % 2;
-			style = random() % 3;
+			flip = rngRandom() % 2;
+			style = rngRandom() % 3;
 		} else {
 			flip = (bool)rightgun2 == false;
 		}
@@ -2473,14 +2473,14 @@ void chrAttackWalk(struct chrdata *chr, bool run)
 	chr->act_attackwalk.frame60count = 0;
 #if PAL
 	// This is really TICKS(400.0f), but off by one bit :(
-	chr->act_attackwalk.frame60max = random() % (s32)(333.33331298828f * g_AttackWalkDurationScale) + TICKS(120);
+	chr->act_attackwalk.frame60max = rngRandom() % (s32)(333.33331298828f * g_AttackWalkDurationScale) + TICKS(120);
 #else
-	chr->act_attackwalk.frame60max = random() % (s32)(400 * g_AttackWalkDurationScale) + TICKS(120);
+	chr->act_attackwalk.frame60max = rngRandom() % (s32)(400 * g_AttackWalkDurationScale) + TICKS(120);
 #endif
 	chr->act_attackwalk.facedtarget = false;
 	chr->act_attackwalk.animcfg = animcfg;
 	chr->act_attackwalk.nextshot60 = 0;
-	chr->act_attackwalk.nextgun = random() % 2;
+	chr->act_attackwalk.nextgun = rngRandom() % 2;
 	chr->act_attackwalk.firegun[HAND_LEFT] = firing[HAND_LEFT];
 	chr->act_attackwalk.firegun[HAND_RIGHT] = firing[HAND_RIGHT];
 	chr->act_attackwalk.everytick[HAND_LEFT] = everytick[HAND_LEFT];
@@ -2545,10 +2545,10 @@ void chrAttackRoll(struct chrdata *chr, bool toleft)
 		struct prop *rightgun2 = chrGetHeldUsableProp(chr, HAND_RIGHT);
 
 		if (leftgun2 && rightgun2) {
-			flip = random() % 2;
+			flip = rngRandom() % 2;
 			onehanded = true;
 
-			if (random() % 3 == 0) {
+			if (rngRandom() % 3 == 0) {
 				firing[HAND_LEFT] = flip;
 				firing[HAND_RIGHT] = !flip;
 			} else {
@@ -2576,14 +2576,14 @@ void chrAttackRoll(struct chrdata *chr, bool toleft)
 
 	if ((toleft && !flip) || (!toleft && flip)) {
 		// Roll to left
-		if (random() % 2) {
+		if (rngRandom() % 2) {
 			animcfg = &g_RollAttackAnims[0];
 		} else {
 			animcfg = &g_RollAttackAnims[2];
 		}
 	} else {
 		// Roll to right
-		if (random() % 2) {
+		if (rngRandom() % 2) {
 			animcfg = &g_RollAttackAnims[1];
 		} else {
 			animcfg = &g_RollAttackAnims[3];
@@ -2637,7 +2637,7 @@ void chrAttackRoll(struct chrdata *chr, bool toleft)
 
 	chr->act_attack.animcfg = animcfg;
 	chr->act_attack.fired = false;
-	chr->act_attack.nextgun = random() % 2;
+	chr->act_attack.nextgun = rngRandom() % 2;
 	chr->act_attack.firegun[HAND_LEFT] = firing[HAND_LEFT];
 	chr->act_attack.firegun[HAND_RIGHT] = firing[HAND_RIGHT];
 	chr->act_attack.everytick[HAND_LEFT] = everytick[HAND_LEFT];
@@ -2658,10 +2658,10 @@ void chrAttackRoll(struct chrdata *chr, bool toleft)
 			chr->act_attack.maxshots = 1;
 		}
 	} else {
-		chr->act_attack.maxshots = (random() % 4) + 2;
+		chr->act_attack.maxshots = (rngRandom() % 4) + 2;
 
 		if (firing[HAND_RIGHT] && firing[HAND_LEFT]) {
-			chr->act_attack.maxshots += (random() % 4) + 2;
+			chr->act_attack.maxshots += (rngRandom() % 4) + 2;
 		}
 	}
 
@@ -2836,7 +2836,7 @@ void chrAttack(struct chrdata *chr, struct attackanimgroup **animgroups, bool fl
 				groupindex = 0;
 			}
 
-			index = random() % animgroups[groupindex]->len;
+			index = rngRandom() % animgroups[groupindex]->len;
 			animcfg = &animgroups[groupindex]->animcfg[index];
 		}
 
@@ -2889,7 +2889,7 @@ void chrAttack(struct chrdata *chr, struct attackanimgroup **animgroups, bool fl
 		chr->act_attack.turning = TURNSTATE_TURNING;
 		chr->act_attack.animcfg = animcfg;
 		chr->act_attack.fired = false;
-		chr->act_attack.nextgun = random() % 2;
+		chr->act_attack.nextgun = rngRandom() % 2;
 		chr->act_attack.firegun[HAND_LEFT] = firing[HAND_LEFT];
 		chr->act_attack.firegun[HAND_RIGHT] = firing[HAND_RIGHT];
 		chr->act_attack.everytick[HAND_LEFT] = everytick[HAND_LEFT];
@@ -2911,13 +2911,13 @@ void chrAttack(struct chrdata *chr, struct attackanimgroup **animgroups, bool fl
 			if (attackflags & ATTACKFLAG_SINGLESHOT) {
 				chr->act_attack.maxshots = 1;
 			} else {
-				chr->act_attack.maxshots = (random() % 4) + 2;
+				chr->act_attack.maxshots = (rngRandom() % 4) + 2;
 			}
 
 			// @bug: ATTACKFLAG_SINGLESHOT is not respected here if both guns
 			// are firing.
 			if (firing[HAND_RIGHT] && firing[HAND_LEFT]) {
-				chr->act_attack.maxshots += (random() % 4) + 2;
+				chr->act_attack.maxshots += (rngRandom() % 4) + 2;
 			}
 		}
 
@@ -3127,8 +3127,8 @@ void chrBeginDeath(struct chrdata *chr, struct coord *dir, f32 relangle, s32 hit
 	chr->act_die.thudframe2 = -1;
 
 	if (chr->race == RACE_DRCAROLL) {
-		chr->drcarollimage_left = (s32)((random() % 400) * 0.01f) + 1;
-		chr->drcarollimage_right = (s32)((random() % 400) * 0.01f) + 1;
+		chr->drcarollimage_left = (s32)((rngRandom() % 400) * 0.01f) + 1;
+		chr->drcarollimage_right = (s32)((rngRandom() % 400) * 0.01f) + 1;
 	}
 
 	chr->sleep = 0;
@@ -3174,7 +3174,7 @@ void chrBeginDeath(struct chrdata *chr, struct coord *dir, f32 relangle, s32 hit
 			// Consider making the chr do an animation where they slump against
 			// a wall or object which is behind them.
 			if ((relangle < 1.5705462694168f || relangle > 4.7116389274597f)
-					&& random() % 20 == 0
+					&& rngRandom() % 20 == 0
 					&& chr->specialdie == SPECIALDIE_NONE) {
 				f32 angle1;
 				f32 angle2 = chrGetInverseTheta(chr);
@@ -3198,7 +3198,7 @@ void chrBeginDeath(struct chrdata *chr, struct coord *dir, f32 relangle, s32 hit
 				if (fval1 < 150 && fval2 < 150
 						&& fval1 - fval2 < 10 && fval1 - fval2 > -10
 						&& !wasknockedout) {
-					struct animtablerow *row = &g_AnimTableHumanSlumped[random() % 4];
+					struct animtablerow *row = &g_AnimTableHumanSlumped[rngRandom() % 4];
 					u32 stack3;
 
 					chr->act_die.thudframe1 = row->thudframe1;
@@ -3220,7 +3220,7 @@ void chrBeginDeath(struct chrdata *chr, struct coord *dir, f32 relangle, s32 hit
 			// Consider making the chr do a fall forward animation.
 			// The player must be behind the chr for it to happen.
 			if (relangle > 2.3558194637299f && relangle < 3.9263656139374f
-					&& random() % 5 < 2
+					&& rngRandom() % 5 < 2
 					&& chr->specialdie == SPECIALDIE_NONE) {
 				struct animtablerow *row;
 
@@ -3243,7 +3243,7 @@ void chrBeginDeath(struct chrdata *chr, struct coord *dir, f32 relangle, s32 hit
 					}
 				} else {
 					row = &rows[1];
-					flip = random() % 2;
+					flip = rngRandom() % 2;
 				}
 
 				chr->act_die.thudframe1 = row->thudframe1;
@@ -3269,10 +3269,10 @@ void chrBeginDeath(struct chrdata *chr, struct coord *dir, f32 relangle, s32 hit
 					struct animtablerow *row;
 
 					if (chr->specialdie == SPECIALDIE_NONE) {
-						s32 tmp = random() % g_AnimTablesByRace[race][index].deathanimcount;
+						s32 tmp = rngRandom() % g_AnimTablesByRace[race][index].deathanimcount;
 						row = &g_AnimTablesByRace[race][index].deathanims[tmp];
 					} else if (chr->specialdie == SPECIALDIE_ONCHAIR) {
-						row = &g_SpecialDieAnims[chr->specialdie + random() % 2];
+						row = &g_SpecialDieAnims[chr->specialdie + rngRandom() % 2];
 
 						// chr->myspecial is the tag number of the chr's chair
 						if (chr->myspecial >= 0) {
@@ -3330,7 +3330,7 @@ void chrBeginDeath(struct chrdata *chr, struct coord *dir, f32 relangle, s32 hit
 
 		if (relangle > 2.3558194637299f && relangle < 3.9263656139374f) {
 			// Player is behind the Skedar - use specific set of anims
-			row = &g_AnimTablesByRace[race][1 + (random() % 6)].deathanims[random() % 3];
+			row = &g_AnimTablesByRace[race][1 + (rngRandom() % 6)].deathanims[rngRandom() % 3];
 
 			chr->act_die.thudframe1 = row->thudframe1;
 			chr->act_die.thudframe2 = row->thudframe2;
@@ -3345,7 +3345,7 @@ void chrBeginDeath(struct chrdata *chr, struct coord *dir, f32 relangle, s32 hit
 			if (index >= 0
 					&& g_AnimTablesByRace[race][index].deathanims != NULL
 					&& g_AnimTablesByRace[race][index].deathanimcount > 0) {
-				s32 tmp = random() % g_AnimTablesByRace[race][index].deathanimcount;
+				s32 tmp = rngRandom() % g_AnimTablesByRace[race][index].deathanimcount;
 				row = &g_AnimTablesByRace[race][index].deathanims[tmp];
 			} else {
 				row = &g_AnimTablesByRace[race][0].deathanims[0];
@@ -3462,7 +3462,7 @@ void chrBeginArgh(struct chrdata *chr, f32 angle, s32 hitpart)
 			&& hitpart == HITPART_PELVIS
 			&& angle > 2.3558194637299f
 			&& angle < 3.9263656139374f
-			&& random() % 5 < 2) {
+			&& rngRandom() % 5 < 2) {
 		struct animtablerow *row;
 		struct animtablerow rows[] = {
 			{ 0x013b, 0, -1, 0.5, 0, -1, -1 },
@@ -3482,7 +3482,7 @@ void chrBeginArgh(struct chrdata *chr, f32 angle, s32 hitpart)
 		chr->act_argh.lvframe60 = g_Vars.lvframe60;
 		chr->sleep = 0;
 
-		row = &rows[random() % 8];
+		row = &rows[rngRandom() % 8];
 
 		modelSetAnimationWithMerge(model, row->animnum, row->flip, 0, row->speed, 16, !instant);
 
@@ -3515,7 +3515,7 @@ void chrBeginArgh(struct chrdata *chr, f32 angle, s32 hitpart)
 		}
 
 		// Select a random animation for this hit location and apply it
-		rowindex = random() % g_AnimTablesByRace[race][index].injuryanimcount;
+		rowindex = rngRandom() % g_AnimTablesByRace[race][index].injuryanimcount;
 
 		row = &g_AnimTablesByRace[race][index].injuryanims[rowindex];
 
@@ -3658,7 +3658,7 @@ void chrYeetFromPos(struct chrdata *chr, struct coord *exppos, f32 force)
 			angleindex = 0;
 		}
 
-		subindex = random() % g_YeetAnimIndexesByRaceAngle[race][angleindex].count;
+		subindex = rngRandom() % g_YeetAnimIndexesByRaceAngle[race][angleindex].count;
 
 		if (race == RACE_HUMAN) {
 			row = &g_YeetAnimsHuman[g_YeetAnimIndexesByRaceAngle[race][angleindex].indexes[subindex]];
@@ -3682,8 +3682,8 @@ void chrYeetFromPos(struct chrdata *chr, struct coord *exppos, f32 force)
 		chr->act_die.drcarollimagedelay = TICKS(45);
 
 		if (chr->race == RACE_DRCAROLL) {
-			chr->drcarollimage_left = 1 + (s32)((random() % 400) * 0.01f);
-			chr->drcarollimage_right = 1 + (s32)((random() % 400) * 0.01f);
+			chr->drcarollimage_left = 1 + (s32)((rngRandom() % 400) * 0.01f);
+			chr->drcarollimage_right = 1 + (s32)((rngRandom() % 400) * 0.01f);
 		}
 
 		chr->sleep = 0;
@@ -3866,7 +3866,7 @@ void chrChoke(struct chrdata *chr, s32 choketype)
 			SFX_ARGH_MAIAN_05E1
 		};
 
-		soundnum = sounds[random() % 3];
+		soundnum = sounds[rngRandom() % 3];
 		nextindexmaian++;
 
 		if (nextindexmaian >= ARRAYCOUNT(sounds)) {
@@ -3882,7 +3882,7 @@ void chrChoke(struct chrdata *chr, s32 choketype)
 				SFX_SKEDAR_ROAR_053A,
 			};
 
-			soundnum = sounds[random() % 5];
+			soundnum = sounds[rngRandom() % 5];
 			nextindexskedar++;
 
 			if (nextindexskedar >= ARRAYCOUNT(sounds)) {
@@ -3895,7 +3895,7 @@ void chrChoke(struct chrdata *chr, s32 choketype)
 				SFX_SKEDAR_ROAR_052F,
 			};
 
-			soundnum = sounds[random() % 3];
+			soundnum = sounds[rngRandom() % 3];
 			nextindexskedar++;
 
 			if (nextindexskedar >= ARRAYCOUNT(sounds)) {
@@ -3982,7 +3982,7 @@ void chrChoke(struct chrdata *chr, s32 choketype)
 			SFX_ARGH_JO_02B3,
 		};
 
-		soundnum = sounds[random() % 10];
+		soundnum = sounds[rngRandom() % 10];
 		allowoverride = true;
 	} else {
 		s16 sounds[] = {
@@ -4009,21 +4009,21 @@ void chrChoke(struct chrdata *chr, s32 choketype)
 				SFX_GURGLE_05B2,
 			};
 
-			if ((random() % 8) == 0) {
-				soundnum = sounds[random() % 3];
+			if ((rngRandom() % 8) == 0) {
+				soundnum = sounds[rngRandom() % 3];
 			}
 
 			chr->soundgap = 10;
 			chr->soundtimer = 0;
 		} else if (choketype == CHOKETYPE_COUGH) {
 			if (male) {
-				if ((random() % 2) == 0) {
+				if ((rngRandom() % 2) == 0) {
 					soundnum = SFX_COUGH_04AF;
 				} else {
 					soundnum = SFX_COUGH_04B0;
 				}
 			} else {
-				s32 index = random() % 4;
+				s32 index = rngRandom() % 4;
 				s32 sounds[] = {
 					SFX_COUGH_05AB,
 					SFX_COUGH_05AC,
@@ -4571,13 +4571,13 @@ void chrDamage(struct chrdata *chr, f32 damage, struct coord *vector, struct gse
 		f32 sqdist = xdiff * xdiff + ydiff * ydiff + zdiff * zdiff;
 
 		if (sqdist < 200 * 200) {
-			damage *= 4.0f + (s32)(random() % 3); // 4, 5 or 6
+			damage *= 4.0f + (s32)(rngRandom() % 3); // 4, 5 or 6
 		} else if (sqdist < 400 * 400) {
-			damage *= 3.0f + (s32)(random() % 2); // 3 or 4
+			damage *= 3.0f + (s32)(rngRandom() % 2); // 3 or 4
 		} else if (sqdist < 800 * 800) {
-			damage *= 2.0f + (s32)(random() % 2); // 2 or 3
+			damage *= 2.0f + (s32)(rngRandom() % 2); // 2 or 3
 		} else if (sqdist < 1600 * 1600) {
-			damage *= 1.0f + (s32)(random() % 2); // 1 or 2
+			damage *= 1.0f + (s32)(rngRandom() % 2); // 1 or 2
 		}
 	}
 
@@ -4650,7 +4650,7 @@ void chrDamage(struct chrdata *chr, f32 damage, struct coord *vector, struct gse
 			u16 sounds[] = { SFX_HIT_METAL_807B, SFX_HIT_METAL_8079, SFX_HATHIT_807C };
 			damage = 0;
 
-			psCreate(NULL, chr->prop, sounds[random() % 3], -1,
+			psCreate(NULL, chr->prop, sounds[rngRandom() % 3], -1,
 					-1, 0, 0, PSTYPE_NONE, NULL, -1, NULL, -1, -1, -1, -1);
 		}
 	}
@@ -5909,7 +5909,7 @@ void chrGoPosChooseAnimation(struct chrdata *chr)
 	if (race == RACE_HUMAN || race == RACE_SKEDAR) {
 		if ((leftgun && rightgun) || (!leftgun && !rightgun)) {
 			heavy = false;
-			flip = random() % 2;
+			flip = rngRandom() % 2;
 		} else {
 			if (weaponIsOneHanded(leftgun) || weaponIsOneHanded(rightgun)) {
 				heavy = false;
@@ -5996,7 +5996,7 @@ void chrGoPosChooseAnimation(struct chrdata *chr)
 							|| chr->hitpart == HITPART_RBICEP) {
 						anim = ANIM_01F8;
 					} else {
-						if (random() % 2) {
+						if (rngRandom() % 2) {
 							anim = ANIM_0018;
 						} else {
 							anim = ANIM_0028;
@@ -6031,7 +6031,7 @@ void chrGoPosChooseAnimation(struct chrdata *chr)
 						speed = 0.4;
 						flip = false;
 					} else if (male) {
-						if (random() % 4 == 0) {
+						if (rngRandom() % 4 == 0) {
 							speed = 0.25;
 							anim = ANIM_001E;
 						} else {
@@ -6040,7 +6040,7 @@ void chrGoPosChooseAnimation(struct chrdata *chr)
 							sp60 = 24;
 						}
 					} else {
-						if (random() % 2) {
+						if (rngRandom() % 2) {
 							anim = ANIM_005E;
 						} else {
 							anim = ANIM_005A;
@@ -6081,14 +6081,14 @@ void chrGoPosChooseAnimation(struct chrdata *chr)
 					} else if (stageGetIndex(g_Vars.stagenum) == STAGEINDEX_CHICAGO) {
 						anim = ANIM_005F;
 					} else if (male) {
-						if (random() % 2) {
+						if (rngRandom() % 2) {
 							anim = ANIM_001D;
 						} else {
 							anim = ANIM_RUNNING_ONEHANDGUN;
 						}
 					} else {
 						if (chr->myaction != MA_PANIC) {
-							if (random() % 2) {
+							if (rngRandom() % 2) {
 								anim = ANIM_005D;
 							} else {
 								anim = ANIM_0073;
@@ -6122,9 +6122,9 @@ void chrGoPosChooseAnimation(struct chrdata *chr)
 						anim = ANIM_01F8;
 						flip = true;
 					} else if (male) {
-						anim = anims[random() % 3];
+						anim = anims[rngRandom() % 3];
 					} else {
-						if (random() % 2) {
+						if (rngRandom() % 2) {
 							anim = ANIM_005C;
 						} else {
 							anim = ANIM_0072;
@@ -6212,7 +6212,7 @@ bool chrGoToRoomPos(struct chrdata *chr, struct coord *pos, RoomNum *room, u32 g
 		chr->act_gopos.flags = goposflags | GOPOSFLAG_INIT;
 		chr->act_gopos.turnspeed = 0;
 		chr->unk32c_21 = 0;
-		chr->act_gopos.waydata.age = random() % 100;
+		chr->act_gopos.waydata.age = rngRandom() % 100;
 		chr->act_gopos.waydata.gotaimposobj = 0;
 
 		if (!isgopos) {
@@ -6286,7 +6286,7 @@ void chrPatrolChooseAnimation(struct chrdata *chr)
 		if ((leftprop && rightprop) || (!leftprop && !rightprop)) {
 			// No weapon, or double weapons
 			heavy = false;
-			flip = random() % 2;
+			flip = rngRandom() % 2;
 		} else {
 			// Single weapon
 			if (weaponIsOneHanded(leftprop) || weaponIsOneHanded(rightprop)) {
@@ -6304,12 +6304,12 @@ void chrPatrolChooseAnimation(struct chrdata *chr)
 			speed = 0.5f * func0f02dff0(ANIM_0028) / func0f02dff0(ANIM_006B);
 
 			if (heavy) {
-				modelSetAnimation(chr->model, random() % 2 ? ANIM_0018 : ANIM_0028, flip, 0, speed, 16);
+				modelSetAnimation(chr->model, rngRandom() % 2 ? ANIM_0018 : ANIM_0028, flip, 0, speed, 16);
 			} else if (ismale) {
 				s32 anims[] = { ANIM_006B, ANIM_001B, ANIM_0016 };
-				modelSetAnimation(chr->model, anims[random() % 3], flip, 0, speed, 16);
+				modelSetAnimation(chr->model, anims[rngRandom() % 3], flip, 0, speed, 16);
 			} else {
-				modelSetAnimation(chr->model, random() % 2 ? ANIM_005C : ANIM_0072, flip, 0, speed, 16);
+				modelSetAnimation(chr->model, rngRandom() % 2 ? ANIM_005C : ANIM_0072, flip, 0, speed, 16);
 			}
 		}
 	} else if (race == RACE_DRCAROLL) {
@@ -6395,7 +6395,7 @@ void chrStartPatrol(struct chrdata *chr, struct path *path)
 			chr->act_patrol.nextstep = nextstep;
 			chr->act_patrol.forward = true;
 
-			chr->act_patrol.waydata.age = random() % 100;
+			chr->act_patrol.waydata.age = rngRandom() % 100;
 			chr->act_patrol.waydata.gotaimposobj = 0;
 			chr->act_patrol.waydata.lastvisible60 = -1;
 
@@ -6761,7 +6761,7 @@ bool chrCheckCanSeeTarget(struct chrdata *chr)
 			}
 
 			iVar8 = chrGetPercentageOfSlowness(chr, iVar8) + 1;
-			result = random() % iVar8 == 0;
+			result = rngRandom() % iVar8 == 0;
 		}
 	}
 
@@ -6853,7 +6853,7 @@ bool chrTrySidestep(struct chrdata *chr)
 
 		if (angle < 0.7852731347084f || angle > 5.4969120025635f
 				|| (angle > 2.3558194637299f && angle < 3.9263656139374f)) {
-			bool side = (random() % 2) == 0;
+			bool side = (rngRandom() % 2) == 0;
 
 			if (chrCanJumpInDirection(chr, side, 100)) {
 				chrSidestep(chr, side);
@@ -6891,7 +6891,7 @@ bool chrTryJumpOut(struct chrdata *chr)
 		//		|| (angle > BADDEG2RAD(135) && angle < BADDEG2RAD(225))) {
 		if (angle < 0.7852731347084f || angle > 5.4969120025635f
 				|| (angle > 2.3558194637299f && angle < BADDEG2RAD(225))) {
-			bool side = (random() % 2) == 0;
+			bool side = (rngRandom() % 2) == 0;
 
 			if (chrCanJumpInDirection(chr, side, 200)) {
 				chrJumpOut(chr, side);
@@ -6920,7 +6920,7 @@ bool chrTryRunSideways(struct chrdata *chr)
 		struct coord vector;
 		struct coord dstpos;
 
-		chrGetSideVectorToTarget(chr, random() % 2 == 0, &vector);
+		chrGetSideVectorToTarget(chr, rngRandom() % 2 == 0, &vector);
 
 		dstpos.x = vector.x * distance + prop->pos.x;
 		dstpos.y = prop->pos.y;
@@ -7019,7 +7019,7 @@ bool chrTryAttackRoll(struct chrdata *chr)
 			f32 sqdistance = x * x + y * y + z * z;
 
 			if (sqdistance >= 200 * 200) {
-				bool toleft = (random() % 2) == 0;
+				bool toleft = (rngRandom() % 2) == 0;
 
 				if (chrCanRollInDirection(chr, toleft, 200)) {
 					chrAttackRoll(chr, toleft);
@@ -7056,7 +7056,7 @@ bool chrTryAttackAmount(struct chrdata *chr, u32 arg1, u32 arg2, u8 lower, u8 up
 		}
 
 		if (lower < upper) {
-			percentage = ((random() % (upper - lower)) + (u32)lower) * 0.01f;
+			percentage = ((rngRandom() % (upper - lower)) + (u32)lower) * 0.01f;
 		} else {
 			percentage = 0;
 		}
@@ -7552,7 +7552,7 @@ bool chrGoToCoverProp(struct chrdata *chr)
 		for (numprops = 0; propnums[numprops] >= 0; numprops++);
 
 		if (numprops > 0) {
-			startindex = random() % numprops;
+			startindex = rngRandom() % numprops;
 		}
 
 		for (i = 0; i < numprops; i++) {
@@ -7653,7 +7653,7 @@ bool chrConsiderGrenadeThrow(struct chrdata *chr, u32 attackflags, u32 entityid)
 	bool done = false;
 
 	if (CHRRACE(chr) == RACE_HUMAN &&
-			chr->grenadeprob > (random() % 255) &&
+			chr->grenadeprob > (rngRandom() % 255) &&
 			chrGetDistanceToTarget(chr) > 200 &&
 			chrIsReadyForOrders(chr)) {
 		struct prop *target = chrGetTargetProp(chr);
@@ -7847,7 +7847,7 @@ bool chrTryPunch(struct chrdata *chr, u8 reverse)
 	struct punchanim *anims = NULL;
 	s32 race = CHRRACE(chr);
 	s32 animindex;
-	u32 chranimflags = (random() % 256 > 128) ? CHRANIMFLAG_FLIP : 0;
+	u32 chranimflags = (rngRandom() % 256 > 128) ? CHRANIMFLAG_FLIP : 0;
 	s32 chrhitradius;
 	s32 playerhitradius;
 	f32 startframe;
@@ -7858,7 +7858,7 @@ bool chrTryPunch(struct chrdata *chr, u8 reverse)
 		startframe = 10;
 		chrhitradius = 120;
 		playerhitradius = 120;
-		animindex = random() % 11;
+		animindex = rngRandom() % 11;
 	} else if (race == RACE_SKEDAR) {
 		anims = g_SkedarPunchAnims;
 		chrhitradius = 200;
@@ -7874,11 +7874,11 @@ bool chrTryPunch(struct chrdata *chr, u8 reverse)
 			animindex = 5;
 		} else if (!chr->weapons_held[HAND_RIGHT] && !chr->weapons_held[HAND_LEFT]) {
 			// Unarmed: Only use indexes 0 or 1
-			animindex = random() % 2;
+			animindex = rngRandom() % 2;
 		} else {
 			// Allow indexes 0-4, but if 3 or 4 then flip the anim based on
 			// which hand is holding the gun
-			animindex = random() % 5;
+			animindex = rngRandom() % 5;
 
 			if (animindex >= 3) {
 				if (!chr->weapons_held[HAND_RIGHT] || !chr->weapons_held[HAND_LEFT]) {
@@ -8055,7 +8055,7 @@ void chrTickStand(struct chrdata *chr)
 							|| (!leftgun && !rightgun)
 							|| weaponIsOneHanded(leftgun)
 							|| weaponIsOneHanded(rightgun)) {
-						modelSetAnimation(chr->model, ANIM_006B, random() % 2, 0, 0.5f, 16);
+						modelSetAnimation(chr->model, ANIM_006B, rngRandom() % 2, 0, 0.5f, 16);
 						modelSetAnimEndFrame(chr->model, animGetNumFrames(ANIM_006B) - 1);
 					} else {
 						if (rightgun || leftgun) {
@@ -8064,7 +8064,7 @@ void chrTickStand(struct chrdata *chr)
 						}
 					}
 				} else if (race == RACE_SKEDAR) {
-					modelSetAnimation(chr->model, ANIM_0392, random() % 2, 0, 0.5f, 16);
+					modelSetAnimation(chr->model, ANIM_0392, rngRandom() % 2, 0, 0.5f, 16);
 					modelSetAnimEndFrame(chr->model, animGetNumFrames(ANIM_0392) - 1);
 				}
 			} else if (chr->act_stand.flags & ATTACKFLAG_AIMATDIRECTION) {
@@ -8083,7 +8083,7 @@ void chrTickStand(struct chrdata *chr)
 	if (chr->prop->flags & PROPFLAG_ONANYSCREENPREVTICK) {
 		chr->sleep = 0;
 	} else {
-		chr->sleep = 14 + (random() % 5);
+		chr->sleep = 14 + (rngRandom() % 5);
 	}
 
 	if (chr->act_stand.checkfacingwall == false) {
@@ -8137,17 +8137,17 @@ void chrTickStand(struct chrdata *chr)
 		if (sp74[sp44[4]] < 200) {
 			index = 7;
 		} else if (sp44[0] == 0 || sp44[1] == 0 || sp44[2] == 0) {
-			if ((sp44[3] == 4 || sp44[4] == 4) && (random() % 3) == 0) {
+			if ((sp44[3] == 4 || sp44[4] == 4) && (rngRandom() % 3) == 0) {
 				if (sp44[3] == 4) {
 					index = 3;
 				} else {
 					index = 4;
 				}
 			} else {
-				index = 5 + random() % 3;
+				index = 5 + rngRandom() % 3;
 			}
 		} else if ((sp44[0] == 1 || sp44[0] == 7) && sp44[5] && sp44[6] && sp44[7]) {
-			index = 5 + random() % 3;
+			index = 5 + rngRandom() % 3;
 		}
 	}
 
@@ -8212,7 +8212,7 @@ void chrTickAnim(struct chrdata *chr)
 	}
 
 	if (chr->sleep <= 0 && chr->act_anim.slowupdate) {
-		chr->sleep = 14 + (random() % 5);
+		chr->sleep = 14 + (rngRandom() % 5);
 	}
 
 	if (modelGetAnimNum(chr->model) == ANIM_RELOAD_0209) {
@@ -8244,7 +8244,7 @@ void chrTickSurrender(struct chrdata *chr)
 				coord.z = -cosf(value);
 
 				if (!propchrHasClearLineInVector(chr->prop, &coord, 20)) {
-					modelSetAnimation(chr->model, ANIM_SURRENDER_002E, random() & 1, 30, 0.5, 16);
+					modelSetAnimation(chr->model, ANIM_SURRENDER_002E, rngRandom() & 1, 30, 0.5, 16);
 					modelSetAnimLooping(chr->model, 30, 16);
 				}
 			}
@@ -8453,7 +8453,7 @@ void chrTickDie(struct chrdata *chr)
 				SFX_DRCAROLL_YOU_WERE_SUPPOSED,
 			};
 
-			psCreate(NULL, chr->prop, phrases[random() % 5], -1,
+			psCreate(NULL, chr->prop, phrases[rngRandom() % 5], -1,
 					-1, 0, 0, PSTYPE_NONE, 0, -1, 0, -1, -1, -1, -1);
 			chr->voicebox = 0;
 		}
@@ -8462,9 +8462,9 @@ void chrTickDie(struct chrdata *chr)
 		if (chr->act_die.drcarollimagedelay > 0) {
 			chr->act_die.drcarollimagedelay -= g_Vars.lvupdate60;
 		} else {
-			chr->act_die.drcarollimagedelay = (random() % TICKS(1000)) * 0.01f + 5.0f;
-			chr->drcarollimage_left = 1 + (s32)((random() % 400) * 0.01f);
-			chr->drcarollimage_right = 1 + (s32)((random() % 400) * 0.01f);
+			chr->act_die.drcarollimagedelay = (rngRandom() % TICKS(1000)) * 0.01f + 5.0f;
+			chr->drcarollimage_left = 1 + (s32)((rngRandom() % 400) * 0.01f);
+			chr->drcarollimage_right = 1 + (s32)((rngRandom() % 400) * 0.01f);
 		}
 
 		if (g_DrCarollDyingTimer > TICKS(310)) {
@@ -8571,7 +8571,7 @@ void chrTickDruggedComingUp(struct chrdata *chr)
 			if (i >= 0
 					&& g_AnimTablesByRace[race][i].deathanims != NULL
 					&& g_AnimTablesByRace[race][i].deathanimcount > 0) {
-				s32 index = random() % g_AnimTablesByRace[race][i].deathanimcount;
+				s32 index = rngRandom() % g_AnimTablesByRace[race][i].deathanimcount;
 				row = &g_AnimTablesByRace[race][i].deathanims[index];
 
 				chr->act_die.thudframe1 = row->thudframe1;
@@ -9165,7 +9165,7 @@ bool func0f03e9f4(struct chrdata *chr, struct attackanimconfig *animcfg, bool fi
 					sp174 += eyeheight * (0.025f - 0.05f * RANDOMFRAC() * arg4);
 				}
 			} else if (sqdist > 1000.0f * 1000.0f) {
-				if ((random() % 3) == 0) {
+				if ((rngRandom() % 3) == 0) {
 					sp174 += eyeheight * (0.05f + 0.1f * RANDOMFRAC() * arg4);
 				} else {
 					sp174 -= eyeheight * (0.05f + 0.55f * RANDOMFRAC() * arg4);
@@ -10098,7 +10098,7 @@ void chrTickShoot(struct chrdata *chr, s32 handnum)
 
 					// This function can never return 2 though...
 					if (botactShootFarsight(chr + zero, 0, &vector, &gunpos) == 2) {
-						normalshoot = random() % 255 > 200;
+						normalshoot = rngRandom() % 255 > 200;
 					}
 				}
 
@@ -10135,7 +10135,7 @@ void chrTickShoot(struct chrdata *chr, s32 handnum)
 
 				// Eyespy is small and hard to hit, so make it a 50/50 chance
 				if (hitprop == NULL && isshootingeyespy) {
-					fudgeforeyespy = random() % 100 > 50;
+					fudgeforeyespy = rngRandom() % 100 > 50;
 
 					if (fudgeforeyespy) {
 						hitprop = targetprop;
@@ -10393,10 +10393,10 @@ void chrTickShoot(struct chrdata *chr, s32 handnum)
 							hitpos.y = targetprop->pos.y;
 							hitpos.z = targetprop->pos.z;
 
-							if (random() % 2) {
-								hitpos.y += 2 + random() % 10;
+							if (rngRandom() % 2) {
+								hitpos.y += 2 + rngRandom() % 10;
 							} else {
-								hitpos.y -= 2 + random() % 10;
+								hitpos.y -= 2 + rngRandom() % 10;
 							}
 
 							bgunPlayPropHitSound(&gset, targetprop, -1);
@@ -10902,13 +10902,13 @@ void robotSetMuzzleFlash(struct chrdata *chr, bool right, bool visible)
 
 void robotAttack(struct chrdata *chr)
 {
-	u32 numshots = random() % 20;
+	u32 numshots = rngRandom() % 20;
 
 	if (chr->unk348[0] && chr->unk348[1]) {
 		chr->actiontype = ACT_ROBOTATTACK;
 
 		chr->unk348[0]->beam->age = -1;
-		chr->unk348[0]->unk00 = random() % 3;
+		chr->unk348[0]->unk00 = rngRandom() % 3;
 		chr->unk348[0]->unk01 = 0;
 		chr->unk348[0]->unk08 = -1;
 		chr->unk348[0]->unk0c = 0.85f;
@@ -10931,7 +10931,7 @@ void robotAttack(struct chrdata *chr)
 		chr->act_robotattack.firing[0] = false;
 
 		chr->unk348[1]->beam->age = -1;
-		chr->unk348[1]->unk00 = random() % 3;
+		chr->unk348[1]->unk00 = rngRandom() % 3;
 		chr->unk348[1]->unk01 = 0;
 		chr->unk348[1]->unk08 = -1;
 		chr->unk348[1]->unk0c = 0.85f;
@@ -11224,7 +11224,7 @@ void chrTickAttackRoll(struct chrdata *chr)
 				f32 sp34 = 16;
 
 				if (chr->act_attack.firegun[HAND_LEFT] && chr->act_attack.firegun[HAND_RIGHT]) {
-					if (random() % 2 == 0) {
+					if (rngRandom() % 2 == 0) {
 						newanimcfg += 4;
 					} else {
 						newanimcfg += 8;
@@ -13269,7 +13269,7 @@ void chrTickSkJump(struct chrdata *chr)
 					SFX_SKEDAR_ROAR_0534,
 				};
 
-				psCreate(NULL, chr->prop, sounds[random() % 3], -1,
+				psCreate(NULL, chr->prop, sounds[rngRandom() % 3], -1,
 						-1, 0, 0, PSTYPE_NONE, 0, -1, 0, -1, -1, -1, -1);
 				modelSetAnimation(chr->model, ANIM_SKEDAR_JUMPAIR, 0, 0, -1, 16);
 				modelSetAnimSpeed(chr->model, 1, 0);
@@ -13657,7 +13657,7 @@ void chraTickBg(void)
 						spawnslen++;
 
 						if (spawnslen >= 10) {
-							writeindex = random() % spawnslen;
+							writeindex = rngRandom() % spawnslen;
 							chrFadeCorpse(spawns[writeindex]);
 							spawns[writeindex] = spawns[spawnslen - 1];
 							spawnslen--;
@@ -13748,7 +13748,7 @@ void chraTickBg(void)
 								onscreenlen++;
 
 								if (onscreenlen >= (VERSION >= VERSION_NTSC_1_0 ? 2 : 3)) {
-									writeindex = random() % onscreenlen;
+									writeindex = rngRandom() % onscreenlen;
 									chrFadeCorpseWhenOffScreen(onscreen[writeindex]);
 									onscreen[writeindex] = onscreen[onscreenlen - 1];
 									onscreenlen--;
@@ -13763,7 +13763,7 @@ void chraTickBg(void)
 
 							// Allow up to 5 corpses off-screen
 							if (offscreenlen >= (VERSION >= VERSION_NTSC_1_0 ? 5 : 6)) {
-								writeindex = random() % offscreenlen;
+								writeindex = rngRandom() % offscreenlen;
 
 								if (offscreen[writeindex]->actiontype != ACT_DEAD) {
 									chrBeginDead(offscreen[writeindex]);
@@ -15257,7 +15257,7 @@ struct prop *chrSpawnAtCoord(s32 bodynum, s32 headnum, struct coord *pos, RoomNu
 #endif
 
 		replacechr = NULL;
-		startindex = random() % g_NumChrSlots;
+		startindex = rngRandom() % g_NumChrSlots;
 		index = startindex;
 
 #if VERSION < VERSION_NTSC_1_0
@@ -15606,7 +15606,7 @@ s32 chrAssignCoverByCriteria(struct chrdata *chr, u16 criteria, s32 refdist)
 					} else if (criteria & COVERCRITERIA_DISTTOFETCHPROP) {
 						sqdist = coordGetSquaredDistanceToCoord(&gotoprop->pos, cover.pos);
 					} else if (userandomdist) {
-						sqdist = random() % 0xf000;
+						sqdist = rngRandom() % 0xf000;
 					} else {
 						sqdist = 0;
 						currefdist = 0;
@@ -16316,7 +16316,7 @@ void chrAvoid(struct chrdata *chr)
 		} else if (relangle > 135 && relangle < 225) {
 			animindex = 2;
 
-			if ((random() % 255) >= 2) {
+			if ((rngRandom() % 255) >= 2) {
 				cdresult = CDRESULT_COLLISION;
 				chr->chrflags &= ~CHRCFLAG_AVOIDING;
 			}
@@ -16324,7 +16324,7 @@ void chrAvoid(struct chrdata *chr)
 			animindex = 3;
 			chrangle += M_PI;
 		} else {
-			animindex = (random() % 100 < 50) ? 0 : 1;
+			animindex = (rngRandom() % 100 < 50) ? 0 : 1;
 
 			if (animindex == 0) {
 				chrangle -= 1.5707963705063f;
diff --git a/src/game/chrai.c b/src/game/chrai.c
index 1dfaefb71..895f22759 100644
--- a/src/game/chrai.c
+++ b/src/game/chrai.c
@@ -729,7 +729,7 @@ void chraiExecute(void *entity, s32 proptype)
 
 			if (g_Vars.chrdata->aishootingatmelist >= 0
 					&& ailistFindById(g_Vars.chrdata->aishootingatmelist) != g_Vars.chrdata->ailist
-					&& g_Vars.chrdata->dodgerating > random() % 100
+					&& g_Vars.chrdata->dodgerating > rngRandom() % 100
 					&& chrHasFlag(g_Vars.chrdata, CHRFLAG1_INDARKROOM, BANK_1) == 0
 					&& chrHasFlag(g_Vars.chrdata, CHRFLAG0_AIVSAI, BANK_0) == 0
 					&& ailistFindById(g_Vars.chrdata->aishootingatmelist) != g_Vars.chrdata->ailist
diff --git a/src/game/chraicommands.c b/src/game/chraicommands.c
index 85f89f83c..ab2cfa326 100644
--- a/src/game/chraicommands.c
+++ b/src/game/chraicommands.c
@@ -1100,7 +1100,7 @@ bool aiTryRunToChr(void)
  */
 bool aiRandom(void)
 {
-	g_Vars.chrdata->random = random() & 0xff;
+	g_Vars.chrdata->random = rngRandom() & 0xff;
 	g_Vars.aioffset += 2;
 
 	return false;
@@ -1114,7 +1114,7 @@ bool aiIfRandomLessThan(void)
 	u8 *cmd = g_Vars.ailist + g_Vars.aioffset;
 
 	if ((g_Vars.chrdata && g_Vars.chrdata->random < cmd[2]) ||
-			(g_Vars.hovercar && ((u8)random()) < cmd[2])) {
+			(g_Vars.hovercar && ((u8)rngRandom()) < cmd[2])) {
 		g_Vars.aioffset = chraiGoToLabel(g_Vars.ailist, g_Vars.aioffset, cmd[3]);
 	} else {
 		g_Vars.aioffset += 4;
@@ -1131,7 +1131,7 @@ bool aiIfRandomGreaterThan(void)
 	u8 *cmd = g_Vars.ailist + g_Vars.aioffset;
 
 	if ((g_Vars.chrdata && g_Vars.chrdata->random > cmd[2]) ||
-			(g_Vars.hovercar && ((u8)random()) > cmd[2])) {
+			(g_Vars.hovercar && ((u8)rngRandom()) > cmd[2])) {
 		g_Vars.aioffset = chraiGoToLabel(g_Vars.ailist, g_Vars.aioffset, cmd[3]);
 	} else {
 		g_Vars.aioffset += 4;
@@ -6925,7 +6925,7 @@ bool aiSayQuip(void)
 		bank = (s16 *) g_MaianQuipBank;
 
 		if (row > 2) {
-			row = random() % 2;
+			row = rngRandom() % 2;
 		}
 	} else if (cmd[7] == 0) {
 		if (g_Vars.chrdata->voicebox > 3) {
@@ -6975,7 +6975,7 @@ bool aiSayQuip(void)
 
 	// If soundgap permits talking at this time and probability passes
 	if (g_Vars.chrdata->soundgap == 0 || g_Vars.chrdata->soundgap * TICKS(60) < g_Vars.chrdata->soundtimer) {
-		if (probability > (s32) (random() % 256)) {
+		if (probability > (s32) (rngRandom() % 256)) {
 			// Try and find a chr in the same squadron who is currently talking
 			while (*chrnums != -2) {
 				loopchr = chrFindByLiteralId(*chrnums);
@@ -7000,7 +7000,7 @@ bool aiSayQuip(void)
 			if (!issomeonetalking
 					&& ((numnearbychrs == 0 && (!cmd[6] || cmd[6] == 255)) || (numnearbychrs > 0 && cmd[6] > 0))) {
 				rowptr = (s16 *) bank + row * 4;
-				column = random() % 3;
+				column = rngRandom() % 3;
 
 				if ((cmd[7] & 0x80) == 0) {
 					audioid = rowptr[1 + column];
@@ -7627,8 +7627,8 @@ bool aiShuffleInvestigationTerminals(void)
 	 * else conditions are unreachable so only 3 of the 4 terminals can be
 	 * selected as the destination.
 	 */
-	rand1 = random() % 3;
-	rand2 = random() % 3;
+	rand1 = rngRandom() % 3;
+	rand2 = rngRandom() % 3;
 
 	if (cmd[8] == 0) {
 		// Place the good terminal
@@ -8768,17 +8768,17 @@ bool aiSayCiStaffQuip(void)
 	s16 quip;
 
 	if (cmd[2] == CIQUIP_GREETING) {
-		quip = g_CiGreetingQuips[g_Vars.chrdata->morale][random() % 3];
+		quip = g_CiGreetingQuips[g_Vars.chrdata->morale][rngRandom() % 3];
 		psPlayFromProp((s8)cmd[3], quip, 0, g_Vars.chrdata->prop, PSTYPE_CHRTALK, 0);
 	}
 
 	if (cmd[2] == CIQUIP_MAIN) {
-		quip = g_CiMainQuips[g_Vars.chrdata->morale][random() % 3];
+		quip = g_CiMainQuips[g_Vars.chrdata->morale][rngRandom() % 3];
 		psPlayFromProp((s8)cmd[3], quip, 0, g_Vars.chrdata->prop, PSTYPE_CHRTALK, 0);
 	}
 
 	if (cmd[2] == CIQUIP_ANNOYED) {
-		quip = g_CiAnnoyedQuips[g_Vars.chrdata->morale][random() % 3];
+		quip = g_CiAnnoyedQuips[g_Vars.chrdata->morale][rngRandom() % 3];
 		psPlayFromProp((s8)cmd[3], quip, 0, g_Vars.chrdata->prop, PSTYPE_CHRTALK, 0);
 	}
 
@@ -8819,7 +8819,7 @@ bool aiDoPresetAnimation(void)
 	};
 
 	if (cmd[2] == 255) {
-		chrTryStartAnim(g_Vars.chrdata, anims[7 + (random() % 8)], 0, -1, 0, 15, 0.5);
+		chrTryStartAnim(g_Vars.chrdata, anims[7 + (rngRandom() % 8)], 0, -1, 0, 15, 0.5);
 	} else if (cmd[2] == 254) {
 		struct prop *prop0 = chrGetHeldProp(g_Vars.chrdata, 1);
 		struct prop *prop1 = chrGetHeldProp(g_Vars.chrdata, 0);
@@ -8830,7 +8830,7 @@ bool aiDoPresetAnimation(void)
 			chrTryStartAnim(g_Vars.chrdata, ANIM_FIX_GUN_JAM_HARD, 0, -1, 0, 5, 0.5);
 		}
 	} else if (cmd[2] == 3) {
-		chrTryStartAnim(g_Vars.chrdata, anims[3 + (random() & 1)], 0, -1, 0, 15, 0.5);
+		chrTryStartAnim(g_Vars.chrdata, anims[3 + (rngRandom() & 1)], 0, -1, 0, 15, 0.5);
 	} else {
 		chrTryStartAnim(g_Vars.chrdata, anims[cmd[2]], 0, -1, 0, 15, 0.5);
 	}
@@ -8979,9 +8979,9 @@ bool aiShuffleRuinsPillars(void)
 	struct tag *ptr2 = tagFindById(cmd[3]);
 	struct tag *ptr3 = tagFindById(cmd[4]);
 	struct tag *src;
-	u8 marked1index = random() % 5;
-	u8 marked2index = random() % 5;
-	u8 marked3index = random() % 5;
+	u8 marked1index = rngRandom() % 5;
+	u8 marked2index = rngRandom() % 5;
+	u8 marked3index = rngRandom() % 5;
 	u8 pillars[5];
 	u8 mines[5];
 	pillars[0] = cmd[5];
@@ -8996,11 +8996,11 @@ bool aiShuffleRuinsPillars(void)
 	mines[4] = cmd[17];
 
 	while (marked2index == marked1index) {
-		marked2index = random() % 5;
+		marked2index = rngRandom() % 5;
 	}
 
 	while (marked3index == marked2index || marked3index == marked1index) {
-		marked3index = random() % 5;
+		marked3index = rngRandom() % 5;
 	}
 
 	// Pillar/mine 1
@@ -9160,7 +9160,7 @@ bool aiShufflePelagicSwitches(void)
 
 	for (i = 8; i < 16; i++) {
 		tag = tagFindById(i);
-		index = random() & 7;
+		index = rngRandom() & 7;
 
 		if (buttonsdone[index] == 0) {
 			// Switch has not yet been mapped
@@ -9610,20 +9610,20 @@ bool aiSetDrCarollImages(void)
 	if (drcaroll) {
 		if (cmd[4] == 7) {
 			if ((g_Vars.lvframenum % 4) == 2) {
-				drcaroll->drcarollimage_left = random() % 6;
+				drcaroll->drcarollimage_left = rngRandom() % 6;
 			}
 		} else if (cmd[4] == 8) {
-			drcaroll->drcarollimage_left = random() % 6;
+			drcaroll->drcarollimage_left = rngRandom() % 6;
 		} else {
 			drcaroll->drcarollimage_left = cmd[4];
 		}
 
 		if (cmd[3] == 7) {
 			if ((g_Vars.lvframenum % 4) == 2) {
-				drcaroll->drcarollimage_right = random() % 6;
+				drcaroll->drcarollimage_right = rngRandom() % 6;
 			}
 		} else if (cmd[3] == 8) {
-			drcaroll->drcarollimage_right = random() % 6;
+			drcaroll->drcarollimage_right = rngRandom() % 6;
 		} else {
 			drcaroll->drcarollimage_right = cmd[3];
 		}
diff --git a/src/game/credits.c b/src/game/credits.c
index 54ad8cf8c..e47cca554 100644
--- a/src/game/credits.c
+++ b/src/game/credits.c
@@ -554,12 +554,12 @@ void creditsCreatePendingBgLayers(u32 mask)
 		s32 shift = i * 8;
 
 		if (g_CreditsData->unk41b0[i] == 0) {
-			g_CreditsData->bglayers[i + 2].type = random() % 12;
+			g_CreditsData->bglayers[i + 2].type = rngRandom() % 12;
 			g_CreditsData->bglayers[i + 2].rotspeed = creditsRandInRange(0.00223f);
 			g_CreditsData->bglayers[i + 2].panspeed = creditsRandInRange(0.00223f);
 
 			if (((u8)(mask >> shift) & 2)) {
-				g_CreditsData->bglayers[i + 2].confignum = random() % 6;
+				g_CreditsData->bglayers[i + 2].confignum = rngRandom() % 6;
 			}
 		}
 	}
@@ -642,20 +642,20 @@ void creditsResetParticles(void)
 		tmp = RANDOMFRAC();
 		g_CreditsData->particles[i].y = (tmp + tmp) * 3000.0f - 3000.0f;
 
-		g_CreditsData->particles[i].unk12 = random() % 4;
-		g_CreditsData->particles[i].colourindex = random() % 4;
+		g_CreditsData->particles[i].unk12 = rngRandom() % 4;
+		g_CreditsData->particles[i].colourindex = rngRandom() % 4;
 		g_CreditsData->particles[i].rotation = RANDOMFRAC() * M_BADTAU;
 
 		if (g_CreditsData->particleminsize < g_CreditsData->particlemaxsize) {
 			g_CreditsData->particles[i].size = g_CreditsData->particleminsize
-				+ (random() % (g_CreditsData->particlemaxsize - g_CreditsData->particleminsize));
+				+ (rngRandom() % (g_CreditsData->particlemaxsize - g_CreditsData->particleminsize));
 		} else {
 			g_CreditsData->particles[i].size = g_CreditsData->particleminsize;
 		}
 
 		g_CreditsData->particles[i].movetype = g_CreditsData->particlemovetype;
 
-		if (random() % 2 == 1) {
+		if (rngRandom() % 2 == 1) {
 			g_CreditsData->particles[i].confignum = g_CreditsData->particleconfignum1;
 		} else {
 			g_CreditsData->particles[i].confignum = g_CreditsData->particleconfignum2;
@@ -685,12 +685,12 @@ void creditsTickParticles(void)
 	} else {
 #if VERSION >= VERSION_NTSC_1_0
 		if (RANDOMFRAC() < 0.007f && joyGetButtons(0, R_TRIG) == 0) {
-			g_CreditsData->particlecolourindex1 = random() % 4;
+			g_CreditsData->particlecolourindex1 = rngRandom() % 4;
 			g_CreditsData->particlecolourweight = 0;
 		}
 #else
 		if (RANDOMFRAC() < 0.007f) {
-			g_CreditsData->particlecolourindex1 = random() % 4;
+			g_CreditsData->particlecolourindex1 = rngRandom() % 4;
 			g_CreditsData->particlecolourweight = 0;
 		}
 #endif
@@ -698,28 +698,28 @@ void creditsTickParticles(void)
 
 #if VERSION >= VERSION_NTSC_1_0
 	if (RANDOMFRAC() < 0.002f && joyGetButtons(0, R_TRIG) == 0) {
-		g_CreditsData->particlemovetype = random() % 5;
+		g_CreditsData->particlemovetype = rngRandom() % 5;
 	}
 #else
 	if (RANDOMFRAC() < 0.002f) {
-		g_CreditsData->particlemovetype = random() % 5;
+		g_CreditsData->particlemovetype = rngRandom() % 5;
 	}
 #endif
 
 #if VERSION >= VERSION_NTSC_1_0
 	if (joyGetButtonsPressedThisFrame(0, R_TRIG)) {
-		g_CreditsData->particlemovetype = random() % 5;
+		g_CreditsData->particlemovetype = rngRandom() % 5;
 
 		if (g_CreditsData->particlecolourindex1 < 0) {
-			g_CreditsData->particlecolourindex1 = random() % 4;
+			g_CreditsData->particlecolourindex1 = rngRandom() % 4;
 			g_CreditsData->particlecolourweight = 0;
 		}
 	}
 #endif
 
 	if (RANDOMFRAC() < 0.007f) {
-		g_CreditsData->particleconfignum1 = random() % 2;
-		g_CreditsData->particleconfignum2 = random() % 2;
+		g_CreditsData->particleconfignum1 = rngRandom() % 2;
+		g_CreditsData->particleconfignum2 = rngRandom() % 2;
 	}
 
 	for (i = 0; i < ARRAYCOUNT(g_CreditsData->particles); i++) {
@@ -744,20 +744,20 @@ void creditsTickParticles(void)
 		if (g_CreditsData->particles[i].z > 0.0f) {
 			g_CreditsData->particles[i].x = RANDOMFRAC() * 2.0f * 3000.0f - 3000.0f;
 			g_CreditsData->particles[i].y = RANDOMFRAC() * 2.0f * 3000.0f - 3000.0f;
-			g_CreditsData->particles[i].unk12 = random() % 4;
-			g_CreditsData->particles[i].colourindex = random() % 4;
+			g_CreditsData->particles[i].unk12 = rngRandom() % 4;
+			g_CreditsData->particles[i].colourindex = rngRandom() % 4;
 			g_CreditsData->particles[i].rotation = RANDOMFRAC() * M_BADTAU;
 
 			if (g_CreditsData->particleminsize < g_CreditsData->particlemaxsize) {
 				g_CreditsData->particles[i].size = g_CreditsData->particleminsize
-					+ random() % (g_CreditsData->particlemaxsize - g_CreditsData->particleminsize);
+					+ rngRandom() % (g_CreditsData->particlemaxsize - g_CreditsData->particleminsize);
 			} else {
 				g_CreditsData->particles[i].size = g_CreditsData->particleminsize;
 			}
 
 			g_CreditsData->particles[i].movetype = g_CreditsData->particlemovetype;
 
-			if (random() % 2 == 1) {
+			if (rngRandom() % 2 == 1) {
 				g_CreditsData->particles[i].confignum = g_CreditsData->particleconfignum1;
 			} else {
 				g_CreditsData->particles[i].confignum = g_CreditsData->particleconfignum2;
@@ -998,7 +998,7 @@ Gfx *creditsDrawBackgroundText(Gfx *gdl, s32 x, s32 y, char *text, struct fontch
 		f32 f24 = i * 0.2f + g_CreditsParticleRotationFrac * 10.0f * M_BADTAU + sp98;
 		f32 f26 = i * 0.1f * (spread + 0.5f) + 1.0f;
 
-		if ((random() % 256) == 1) {
+		if ((rngRandom() % 256) == 1) {
 			f26 *= 10.0f;
 		}
 
@@ -1075,7 +1075,7 @@ void creditsResetSlides(void)
 	}
 
 	for (i = 0; i < NUM_CORE_TEAM; i++) {
-		s32 index = random() % (NUM_CORE_TEAM - i);
+		s32 index = rngRandom() % (NUM_CORE_TEAM - i);
 
 		g_CreditsData->coreteammap[i + 1] = pool[index];
 
@@ -1348,7 +1348,7 @@ void creditsTickSlide(void)
 		} while (credit && credit->more && g_CreditsData->numthisslide < 4);
 
 		for (i = 0; i < ARRAYCOUNT(g_CreditsData->unk41a8); i++) {
-			g_CreditsData->unk41a8[i] = random() % 3 | random() % 3 << 2 | random() % 16 << 4;
+			g_CreditsData->unk41a8[i] = rngRandom() % 3 | rngRandom() % 3 << 2 | rngRandom() % 16 << 4;
 		}
 
 		creditsCreatePendingBgLayers(0xffffffff);
@@ -1656,10 +1656,10 @@ Gfx *creditsDrawSlide(Gfx *gdl)
 				}
 
 				// Apply random flicker
-				if (settled && random() % (g_CreditsData->numthisslide * 16) == 1) {
+				if (settled && rngRandom() % (g_CreditsData->numthisslide * 16) == 1) {
 					transfrac = RANDOMFRAC() * 0.05f;
-					hdir = random() % 3;
-					vdir = random() % 3;
+					hdir = rngRandom() % 3;
+					vdir = rngRandom() % 3;
 				}
 
 				extray = 120 - cury / 2;
diff --git a/src/game/dlights.c b/src/game/dlights.c
index 93d59f826..ee10d3678 100644
--- a/src/game/dlights.c
+++ b/src/game/dlights.c
@@ -425,7 +425,7 @@ void roomInitLights(s32 roomnum)
 #if VERSION < VERSION_NTSC_1_0
 		if (cheatIsActive(CHEAT_PERFECTDARKNESS)) {
 			light->brightness = 0;
-			light->sparkable = (random() % 2) ? true : false;
+			light->sparkable = (rngRandom() % 2) ? true : false;
 			light->healthy = false;
 			light->on = false;
 			light->sparking = false;
@@ -526,7 +526,7 @@ void roomSetLightsFaulty(s32 roomnum, s32 chance)
 
 	if (g_Rooms[roomnum].numlights) {
 		for (i = 0; i < g_Rooms[roomnum].numlights; i++) {
-			if ((random() % 100) < chance) {
+			if ((rngRandom() % 100) < chance) {
 				light->healthy = false;
 				light->on = false;
 			}
@@ -980,9 +980,9 @@ bool lightTickBroken(s32 roomnum, s32 lightnum)
 	}
 
 	if (light->sparking) {
-		if ((random() % 8) == 0) {
+		if ((rngRandom() % 8) == 0) {
 			light->sparking = false;
-		} else if ((random() % 2) == 0) {
+		} else if ((rngRandom() % 2) == 0) {
 			struct coord spc8;
 			struct coord spbc;
 			struct coord spb0;
@@ -1036,7 +1036,7 @@ bool lightTickBroken(s32 roomnum, s32 lightnum)
 
 			room = (void *) (roomnum * sizeof(struct bgroom));
 
-			switch (random() % 4) {
+			switch (rngRandom() % 4) {
 			case 0:
 				if (roomnum && roomnum && roomnum);
 				sparktype = SPARKTYPE_LIGHT1;
@@ -1061,7 +1061,7 @@ bool lightTickBroken(s32 roomnum, s32 lightnum)
 
 			sparksCreate(roomnum, NULL, &centre, &spa4, &sp8c, sparktype);
 
-			if ((random() % 4) == 0) {
+			if ((rngRandom() % 4) == 0) {
 				smokerooms[0] = roomnum;
 				smokerooms[1] = -1;
 
@@ -1073,7 +1073,7 @@ bool lightTickBroken(s32 roomnum, s32 lightnum)
 			return true;
 		}
 	} else {
-		if ((random() % 80) == 0) {
+		if ((rngRandom() % 80) == 0) {
 			light->sparking = true;
 		}
 	}
@@ -1125,7 +1125,7 @@ void lightsConfigureForPerfectDarknessCutscene(void)
 		g_Rooms[i].lightop_to_frac = 0.5f;
 
 		for (j = 0; j < g_Rooms[i].numlights; j++) {
-			light->sparkable = random() % 2 ? true : false;
+			light->sparkable = rngRandom() % 2 ? true : false;
 			light->healthy = true;
 			light->on = true;
 			light->sparking = false;
@@ -1150,7 +1150,7 @@ void lightsConfigureForPerfectDarknessGameplay(void)
 		g_Rooms[i].lightop_to_frac = 0;
 
 		for (j = 0; j < g_Rooms[i].numlights; j++) {
-			light->sparkable = random() % 2 ? true : false;
+			light->sparkable = rngRandom() % 2 ? true : false;
 			light->healthy = false;
 			light->on = false;
 			light->sparking = false;
diff --git a/src/game/explosions.c b/src/game/explosions.c
index 72d1877b5..49d7e9bea 100644
--- a/src/game/explosions.c
+++ b/src/game/explosions.c
@@ -259,7 +259,7 @@ bool explosionCreate(struct prop *sourceprop, struct coord *exppos, RoomNum *exp
 		f32 sum = xdist * xdist + ydist * ydist + zdist * zdist;
 
 		if (sum * lodscale * lodscale > 400 * 400) {
-			if (random() % 2 == 0) {
+			if (rngRandom() % 2 == 0) {
 				if (sourceprop) {
 					smokeCreateSimple(&sourceprop->pos, sourceprop->rooms, g_ExplosionTypes[type].smoketype);
 				} else {
@@ -711,7 +711,7 @@ void explosionInflictDamage(struct prop *expprop)
 
 	// Flicker room lighting
 	for (i = 0; expprop->rooms[i] != -1; i++) {
-		if (random() % 2048 <= 240) {
+		if (rngRandom() % 2048 <= 240) {
 			roomFlashLighting(expprop->rooms[i], type->rangeh, 255);
 		}
 	}
@@ -1199,7 +1199,7 @@ u32 explosionTick(struct prop *prop)
 		// Create smoke
 		if (((exp->age == TICKS(15) && exp->type == EXPLOSIONTYPE_GASBARREL)
 					|| (exp->age == maxage - TICKS(20) && exp->type != EXPLOSIONTYPE_GASBARREL))
-				&& (exp->type != EXPLOSIONTYPE_BULLETHOLE || (random() % 2) == 0)) {
+				&& (exp->type != EXPLOSIONTYPE_BULLETHOLE || (rngRandom() % 2) == 0)) {
 			if (exp->source) {
 				smokeCreateSimple(&exp->source->pos, exp->source->rooms, type->smoketype);
 			} else {
diff --git a/src/game/footstep.c b/src/game/footstep.c
index 2480ad470..21191c102 100644
--- a/src/game/footstep.c
+++ b/src/game/footstep.c
@@ -139,7 +139,7 @@ s32 footstepChooseSound(struct chrdata *chr, s32 footstepindex)
 	running = footstepIsRunning(g_FootstepAnims[footstepindex].animnum);
 
 	do {
-		rand = random() % 8;
+		rand = rngRandom() % 8;
 		index = (running ? 2 : 0) + (rand & 5) + floortype * 8;
 	} while (index == chr->lastfootsample);
 
diff --git a/src/game/gailists.c b/src/game/gailists.c
index 7695d2032..567075eea 100644
--- a/src/game/gailists.c
+++ b/src/game/gailists.c
@@ -1820,7 +1820,7 @@ u8 func0007_alerted[] = {
 	/**
 	 * Pseudocode for the below logic:
 	 *
-	 * rand = random()
+	 * rand = rngRandom()
 	 * if rand < 10
 	 *     gun jammed
 	 * else if rand <= 64
@@ -1832,7 +1832,7 @@ u8 func0007_alerted[] = {
 	 *         goto regular_attack
 	 * else
 	 *     regular_attack:
-	 *     if random() > 50
+	 *     if rngRandom() > 50
 	 *         stand or kneel attack (50% chance each)
 	 *     else
 	 *         walk or roll attack (50% chance each)
diff --git a/src/game/game_006900.c b/src/game/game_006900.c
index cdc523269..863dddb8e 100644
--- a/src/game/game_006900.c
+++ b/src/game/game_006900.c
@@ -72,7 +72,7 @@ void menuTickTimers(void)
 
 		if (checksum != CHECKSUM_PLACEHOLDER) {
 			u32 *ptr = (u32 *)&bgReset;
-			ptr += random() % 0x40;
+			ptr += rngRandom() % 0x40;
 			end = &ptr[4];
 
 			while (ptr < end) {
diff --git a/src/game/gunfx.c b/src/game/gunfx.c
index f51d004e3..eb16bfae2 100644
--- a/src/game/gunfx.c
+++ b/src/game/gunfx.c
@@ -361,10 +361,10 @@ Gfx *beamRender(Gfx *gdl, struct beam *beam, bool arg2, u8 arg3)
 			sp130 = 10.0f;
 			texconfig = &g_TexLaserConfigs[0];
 
-			colours[0].a = 150 + (random() % 50);
+			colours[0].a = 150 + (rngRandom() % 50);
 
-			if ((random() % 5) == 0) {
-				colours[0].r = colours[0].g = 255 - (random() % 100);
+			if ((rngRandom() % 5) == 0) {
+				colours[0].r = colours[0].g = 255 - (rngRandom() % 100);
 			}
 		} else {
 			sp130 = 30.0f;
@@ -738,8 +738,8 @@ void casingCreateForHand(s32 handnum, f32 ground, Mtxf *mtx)
 				}
 			}
 
-			sp5c = ((s32)((random() >> 24) * magic) >> 10) + magic;
-			f0 = (random() % sp5c) / PALUP((f32) (OS_CPU_COUNTER / 60));
+			sp5c = ((s32)((rngRandom() >> 24) * magic) >> 10) + magic;
+			f0 = (rngRandom() % sp5c) / PALUP((f32) (OS_CPU_COUNTER / 60));
 
 			newyspeed = casing->speed.y - f0 * 0.2777778f;
 
@@ -795,8 +795,8 @@ void casingCreateForHand(s32 handnum, f32 ground, Mtxf *mtx)
 				}
 			}
 
-			sp4c = ((s32) ((random() >> 24) * magic) >> 10) + magic;
-			f0 = (random() % sp4c) / PALUP((f32) (OS_CPU_COUNTER / 60));
+			sp4c = ((s32) ((rngRandom() >> 24) * magic) >> 10) + magic;
+			f0 = (rngRandom() % sp4c) / PALUP((f32) (OS_CPU_COUNTER / 60));
 
 			newyspeed = casing->speed.y - f0 * 0.2777778f;
 
diff --git a/src/game/lv.c b/src/game/lv.c
index 36917c59b..2d0622be5 100644
--- a/src/game/lv.c
+++ b/src/game/lv.c
@@ -1454,7 +1454,7 @@ Gfx *lvRender(Gfx *gdl)
 								g_CutsceneStaticTimer -= g_Vars.diffframe60;
 
 								if (g_CutsceneStaticTimer < 0) {
-									g_CutsceneStaticTimer = random() % TICKS(200) + TICKS(40);
+									g_CutsceneStaticTimer = rngRandom() % TICKS(200) + TICKS(40);
 									g_CutsceneStaticActive = false;
 								}
 
@@ -1471,7 +1471,7 @@ Gfx *lvRender(Gfx *gdl)
 
 								// Consider a single frame of static, separate
 								// to the main static above
-								if (random() % 60 == 1) {
+								if (rngRandom() % 60 == 1) {
 									cutscenestatic = 255;
 									sndStart(var80095200, SFX_INFIL_STATIC_SHORT, NULL, -1, -1, -1, -1, -1);
 								}
diff --git a/src/game/mplayer/mplayer.c b/src/game/mplayer/mplayer.c
index e70b1dcd8..035e0bf71 100644
--- a/src/game/mplayer/mplayer.c
+++ b/src/game/mplayer/mplayer.c
@@ -1235,13 +1235,13 @@ void mpApplyWeaponSet(void)
 		s32 numoptions = mpGetNumWeaponOptions();
 
 		for (i = 0; i < ARRAYCOUNT(g_MpSetup.weapons); i++) {
-			mpSetWeaponSlot(i, random() % numoptions);
+			mpSetWeaponSlot(i, rngRandom() % numoptions);
 		}
 	} else if (g_MpWeaponSetNum == WEAPONSET_RANDOMFIVE) {
 		s32 numoptions = mpGetNumWeaponOptions() - 2;
 
 		for (i = 0; i < 5; i++) {
-			mpSetWeaponSlot(i, random() % numoptions + 1);
+			mpSetWeaponSlot(i, rngRandom() % numoptions + 1);
 		}
 
 		mpSetWeaponSlot(i, mpGetNumWeaponOptions() - 1);
@@ -1421,7 +1421,7 @@ s32 mpFindMaxInt(s32 numplayers, s32 val0, s32 val1, s32 val2, s32 val3)
 	s32 bestplayer = 0;
 
 	if (numplayers >= 2) {
-		if (val1 > bestvalue || (val1 == bestvalue && (random() % 2))) {
+		if (val1 > bestvalue || (val1 == bestvalue && (rngRandom() % 2))) {
 			bestplayer = 1;
 			bestvalue = val1;
 		} else {
@@ -1430,13 +1430,13 @@ s32 mpFindMaxInt(s32 numplayers, s32 val0, s32 val1, s32 val2, s32 val3)
 		}
 
 		if (numplayers >= 3) {
-			if (val2 > bestvalue || (val2 == bestvalue && (random() % 2))) {
+			if (val2 > bestvalue || (val2 == bestvalue && (rngRandom() % 2))) {
 				bestplayer = 2;
 				bestvalue = val2;
 			}
 
 			if (numplayers >= 4) {
-				if (val3 > bestvalue || (val3 == bestvalue && (random() % 2))) {
+				if (val3 > bestvalue || (val3 == bestvalue && (rngRandom() % 2))) {
 					bestplayer = 3;
 				}
 			}
@@ -1452,7 +1452,7 @@ s32 mpFindMinInt(s32 numplayers, s32 val0, s32 val1, s32 val2, s32 val3)
 	s32 bestplayer = 0;
 
 	if (numplayers >= 2) {
-		if (val1 < bestvalue || (val1 == bestvalue && (random() % 2))) {
+		if (val1 < bestvalue || (val1 == bestvalue && (rngRandom() % 2))) {
 			bestplayer = 1;
 			bestvalue = val1;
 		} else {
@@ -1461,13 +1461,13 @@ s32 mpFindMinInt(s32 numplayers, s32 val0, s32 val1, s32 val2, s32 val3)
 		}
 
 		if (numplayers >= 3) {
-			if (val2 < bestvalue || (val2 == bestvalue && (random() % 2))) {
+			if (val2 < bestvalue || (val2 == bestvalue && (rngRandom() % 2))) {
 				bestplayer = 2;
 				bestvalue = val2;
 			}
 
 			if (numplayers >= 4) {
-				if (val3 < bestvalue || (val3 == bestvalue && (random() % 2))) {
+				if (val3 < bestvalue || (val3 == bestvalue && (rngRandom() % 2))) {
 					bestplayer = 3;
 				}
 			}
@@ -1485,7 +1485,7 @@ s32 mpFindMaxFloat(s32 numplayers, f32 val0, f32 val1, f32 val2, f32 val3)
 	s32 bestplayer = 0;
 
 	if (numplayers >= 2) {
-		if (val1 > val0 || (val1 == val0 && (random() % 2))) {
+		if (val1 > val0 || (val1 == val0 && (rngRandom() % 2))) {
 			bestplayer = 1;
 			bestvalue = val1;
 		} else {
@@ -1494,13 +1494,13 @@ s32 mpFindMaxFloat(s32 numplayers, f32 val0, f32 val1, f32 val2, f32 val3)
 		}
 
 		if (numplayers >= 3) {
-			if (val2 > bestvalue || (val2 == bestvalue && (random() % 2))) {
+			if (val2 > bestvalue || (val2 == bestvalue && (rngRandom() % 2))) {
 				bestplayer = 2;
 				bestvalue = val2;
 			}
 
 			if (numplayers >= 4) {
-				if (val3 > bestvalue || (val3 == bestvalue && (random() % 2))) {
+				if (val3 > bestvalue || (val3 == bestvalue && (rngRandom() % 2))) {
 					bestplayer = 3;
 				}
 			}
@@ -1520,7 +1520,7 @@ s32 mpFindMinFloat(s32 numplayers, f32 val0, f32 val1, f32 val2, f32 val3)
 	if (numplayers >= 2) {
 		if (val0);
 
-		if (val1 < val0 || (val1 == val0 && (random() % 2))) {
+		if (val1 < val0 || (val1 == val0 && (rngRandom() % 2))) {
 			bestplayer = 1;
 			bestvalue = val1;
 		} else {
@@ -1529,13 +1529,13 @@ s32 mpFindMinFloat(s32 numplayers, f32 val0, f32 val1, f32 val2, f32 val3)
 		}
 
 		if (numplayers >= 3) {
-			if (val2 < bestvalue || (val2 == bestvalue && (random() % 2))) {
+			if (val2 < bestvalue || (val2 == bestvalue && (rngRandom() % 2))) {
 				bestplayer = 2;
 				bestvalue = val2;
 			}
 
 			if (numplayers >= 4) {
-				if (val3 < bestvalue || (val3 == bestvalue && (random() % 2))) {
+				if (val3 < bestvalue || (val3 == bestvalue && (rngRandom() % 2))) {
 					bestplayer = 3;
 				}
 			}
@@ -2351,11 +2351,11 @@ void mpCalculateAwards(void)
 				numdone = 1;
 			}
 
-			awardindex = random() % 17;
+			awardindex = rngRandom() % 17;
 		}
 
 		while (numdone < 2) {
-			awardindex = random() % 17;
+			awardindex = rngRandom() % 17;
 
 			if (metrics[i].awards & (1 << awardindex)) {
 				metrics[i].awards &= ~(1 << awardindex);
@@ -2622,9 +2622,9 @@ s32 mpGetMpheadnumByMpbodynum(s32 mpbodynum)
 
 	if (headnum == 1000) {
 		if (g_HeadsAndBodies[g_MpBodies[mpbodynum].bodynum].ismale) {
-			headnum = g_MpMaleHeads[random() % ARRAYCOUNT(g_MpMaleHeads)];
+			headnum = g_MpMaleHeads[rngRandom() % ARRAYCOUNT(g_MpMaleHeads)];
 		} else {
-			headnum = g_MpFemaleHeads[random() % ARRAYCOUNT(g_MpFemaleHeads)];
+			headnum = g_MpFemaleHeads[rngRandom() % ARRAYCOUNT(g_MpFemaleHeads)];
 		}
 	}
 
@@ -2647,8 +2647,8 @@ void mpFindUnusedHeadAndBody(u8 *mpheadnum, u8 *mpbodynum)
 
 	do {
 		available = true;
-		trympheadnum = random() % ARRAYCOUNT(g_MpHeads);
-		trympbodynum = random() % ARRAYCOUNT(g_MpBodies);
+		trympheadnum = rngRandom() % ARRAYCOUNT(g_MpHeads);
+		trympbodynum = rngRandom() % ARRAYCOUNT(g_MpBodies);
 
 		for (i = 0; i < MAX_MPCHRS; i++) {
 			if (g_MpSetup.chrslots & (1 << i)) {
@@ -2673,7 +2673,7 @@ void mpFindUnusedHeadAndBody(u8 *mpheadnum, u8 *mpbodynum)
 
 s32 mpChooseRandomLockPlayer(void)
 {
-	s32 start = random() % MAX_PLAYERS;
+	s32 start = rngRandom() % MAX_PLAYERS;
 	s32 i;
 
 	for (i = (start + 1) % MAX_PLAYERS;; i = (i + 1) % MAX_PLAYERS) {
@@ -2929,7 +2929,7 @@ void mpRandomiseMultiTracks(void)
 	s32 i;
 
 	for (i = 0; i != ARRAYCOUNT(g_BossFile.multipletracknums); i++) {
-		g_BossFile.multipletracknums[i] = random();
+		g_BossFile.multipletracknums[i] = rngRandom();
 	}
 }
 
@@ -2964,7 +2964,7 @@ s32 mpChooseTrack(void)
 
 		if (numselected == 0) {
 			do {
-				tracknum = mpGetTrackNumAtSlotIndex(random() % numunlocked);
+				tracknum = mpGetTrackNumAtSlotIndex(rngRandom() % numunlocked);
 			} while (tracknum == g_MpLockInfo.unk04);
 
 			g_MpLockInfo.unk04 = tracknum;
@@ -2974,7 +2974,7 @@ s32 mpChooseTrack(void)
 		}
 
 		do {
-			s32 selectionindex = random() % numselected;
+			s32 selectionindex = rngRandom() % numselected;
 			s32 selectioncount = 0;
 			tracknum = -1;
 
@@ -3008,7 +3008,7 @@ s32 mpChooseTrack(void)
 		s32 numunlocked = mpGetNumUnlockedTracks();
 
 		do {
-			tracknum = mpGetTrackNumAtSlotIndex(random() % numunlocked);
+			tracknum = mpGetTrackNumAtSlotIndex(rngRandom() % numunlocked);
 		} while (tracknum == g_MpLockInfo.unk04);
 
 		g_MpLockInfo.unk04 = tracknum;
@@ -3129,7 +3129,7 @@ void mpCreateBotFromProfile(s32 botnum, u8 profilenum)
 	g_BotConfigsArray[botnum].base.team = team;
 
 	while (!available) {
-		headnum = g_BotHeads[random() % ARRAYCOUNT(g_BotHeads)];
+		headnum = g_BotHeads[rngRandom() % ARRAYCOUNT(g_BotHeads)];
 		available = true;
 
 		for (i = 0; i < MAX_MPCHRS; i++) {
diff --git a/src/game/mplayer/scenarios/capturethecase.inc b/src/game/mplayer/scenarios/capturethecase.inc
index 5a843bdd6..79a205f80 100644
--- a/src/game/mplayer/scenarios/capturethecase.inc
+++ b/src/game/mplayer/scenarios/capturethecase.inc
@@ -254,7 +254,7 @@ void ctcInitProps(void)
 
 	for (i = 0; i != ARRAYCOUNT(g_ScenarioData.ctc.teamindexes); i++) {
 		do {
-			g_ScenarioData.ctc.teamindexes[i] = random() % 4;
+			g_ScenarioData.ctc.teamindexes[i] = rngRandom() % 4;
 		} while (teamsdone[g_ScenarioData.ctc.teamindexes[i]]);
 
 		teamsdone[g_ScenarioData.ctc.teamindexes[i]] = true;
diff --git a/src/game/mplayer/scenarios/hackthatmac.inc b/src/game/mplayer/scenarios/hackthatmac.inc
index 1b5bb5310..ce182c1d1 100644
--- a/src/game/mplayer/scenarios/hackthatmac.inc
+++ b/src/game/mplayer/scenarios/hackthatmac.inc
@@ -272,13 +272,13 @@ void htbCreateUplink(void)
 	}
 
 	if (count > 0) {
-		count = random() % count;
+		count = rngRandom() % count;
 		var800869ec = candidates[count];
 		var800869ec->hidden |= OBJHFLAG_DELETING;
 		var800869ec->hidden2 |= OBJH2FLAG_CANREGEN;
 		padnum = var800869ec->pad;
 	} else if (g_ScenarioData.htm.numpads > 0) {
-		padnum = g_ScenarioData.htm.padnums[random() % g_ScenarioData.htm.numpads];
+		padnum = g_ScenarioData.htm.padnums[rngRandom() % g_ScenarioData.htm.numpads];
 	} else {
 		padnum = 0;
 	}
@@ -334,7 +334,7 @@ void htmInitProps(void)
 		s32 padnum;
 
 		do {
-			rand = random() % data->numpads;
+			rand = rngRandom() % data->numpads;
 			padnum = data->padnums[rand];
 		} while (padnum <= 0);
 
diff --git a/src/game/mplayer/scenarios/holdthebriefcase.inc b/src/game/mplayer/scenarios/holdthebriefcase.inc
index 65d21e42b..f5ac62e40 100644
--- a/src/game/mplayer/scenarios/holdthebriefcase.inc
+++ b/src/game/mplayer/scenarios/holdthebriefcase.inc
@@ -274,13 +274,13 @@ void htbCreateToken(void)
 
 	// Choose the candidate and remove it
 	if (count > 0) {
-		count = random() % count;
+		count = rngRandom() % count;
 		var800869ec = candidates[count];
 		g_ScenarioData.htb.tokenpad = var800869ec->pad;
 		var800869ec->hidden |= OBJHFLAG_DELETING;
 		var800869ec->hidden2 |= OBJH2FLAG_CANREGEN;
 	} else if (g_ScenarioData.htb.nextindex > 0) {
-		g_ScenarioData.htb.tokenpad = g_ScenarioData.htb.padnums[random() % g_ScenarioData.htb.nextindex];
+		g_ScenarioData.htb.tokenpad = g_ScenarioData.htb.padnums[rngRandom() % g_ScenarioData.htb.nextindex];
 	} else {
 		g_ScenarioData.htb.tokenpad = 0;
 	}
diff --git a/src/game/mplayer/scenarios/kingofthehill.inc b/src/game/mplayer/scenarios/kingofthehill.inc
index 53e72a358..0160c7632 100644
--- a/src/game/mplayer/scenarios/kingofthehill.inc
+++ b/src/game/mplayer/scenarios/kingofthehill.inc
@@ -221,7 +221,7 @@ void kohInitProps(void)
 	struct pad pad;
 
 	if (g_ScenarioData.koh.hillcount > 1) {
-		g_ScenarioData.koh.hillindex = random() % g_ScenarioData.koh.hillcount;
+		g_ScenarioData.koh.hillindex = rngRandom() % g_ScenarioData.koh.hillcount;
 		pad_id = g_ScenarioData.koh.hillpads[g_ScenarioData.koh.hillindex];
 	} else {
 		// @bug: If a stage setup file only has one hill, pad_id is not assigned
@@ -311,7 +311,7 @@ void kohTick(void)
 				previndex = g_ScenarioData.koh.hillindex;
 
 				do {
-					g_ScenarioData.koh.hillindex = random() % g_ScenarioData.koh.hillcount;
+					g_ScenarioData.koh.hillindex = rngRandom() % g_ScenarioData.koh.hillcount;
 				} while (g_ScenarioData.koh.hillindex == previndex);
 
 				padnum = g_ScenarioData.koh.hillpads[g_ScenarioData.koh.hillindex];
diff --git a/src/game/mplayer/scenarios/popacap.inc b/src/game/mplayer/scenarios/popacap.inc
index ca9d5060d..1e51adb64 100644
--- a/src/game/mplayer/scenarios/popacap.inc
+++ b/src/game/mplayer/scenarios/popacap.inc
@@ -170,7 +170,7 @@ void pacReset(void)
 
 	while (i < g_MpNumChrs) {
 		bool isnew;
-		s32 victimplayernum = random() % g_MpNumChrs;
+		s32 victimplayernum = rngRandom() % g_MpNumChrs;
 
 		for (j = 0, isnew = true; j < i; j++) {
 			if (data->victims[j] == victimplayernum) {
diff --git a/src/game/mplayer/setup.c b/src/game/mplayer/setup.c
index 3a333a49f..3a002bd26 100644
--- a/src/game/mplayer/setup.c
+++ b/src/game/mplayer/setup.c
@@ -139,7 +139,7 @@ s16 mpChooseRandomStage(void)
 		}
 	}
 
-	index = random() % numchallengescomplete;
+	index = rngRandom() % numchallengescomplete;
 
 	for (i = 0; i < 16; i++) {
 		if (challengeIsFeatureUnlocked(g_MpArenas[i].requirefeature)) {
@@ -3378,7 +3378,7 @@ MenuItemHandlerResult menuhandlerMpNTeams(s32 operation, struct menuitem *item,
 		s32 somevalue = (numchrs + numteams - 1) / numteams;
 		s32 teamsremaining = numteams;
 		s32 chrsremaining = numchrs;
-		s32 start = random() % numchrs;
+		s32 start = rngRandom() % numchrs;
 
 		s32 i;
 		s32 teamnum;
@@ -3401,7 +3401,7 @@ MenuItemHandlerResult menuhandlerMpNTeams(s32 operation, struct menuitem *item,
 #endif
 
 			if (teamsremaining >= chrsremaining) {
-				teamnum = random() % numteams;
+				teamnum = rngRandom() % numteams;
 
 				while (true) {
 					if (array[teamnum] == 0) {
@@ -3416,7 +3416,7 @@ MenuItemHandlerResult menuhandlerMpNTeams(s32 operation, struct menuitem *item,
 					}
 				}
 			} else {
-				teamnum = random() % numteams;
+				teamnum = rngRandom() % numteams;
 
 				while (true) {
 					if (array[teamnum] < somevalue) {
diff --git a/src/game/objectives.c b/src/game/objectives.c
index 9d079af7e..a3136ce2c 100644
--- a/src/game/objectives.c
+++ b/src/game/objectives.c
@@ -117,7 +117,7 @@ void tagsReset(void)
 			// Read 4KB from a random ROM location within 128KB from the start of
 			// the ROM, and write it to a random memory location between 0x80010000
 			// and 0x80030ff8. This will corrupt instructions in the lib segment.
-			dmaExec((u8 *)((random() & 0x1fff8) + 0x80010000), random() & 0x1fffe, 0x1000);
+			dmaExec((u8 *)((rngRandom() & 0x1fff8) + 0x80010000), rngRandom() & 0x1fffe, 0x1000);
 		}
 	}
 #endif
diff --git a/src/game/padhalllv.c b/src/game/padhalllv.c
index 2dca0ae16..1eeffbf1a 100644
--- a/src/game/padhalllv.c
+++ b/src/game/padhalllv.c
@@ -272,7 +272,7 @@ struct waygroup *waygroupChooseNeighbour(s32 *groupnums, s32 step, u32 ignoremas
 				}
 
 				if (!g_NavSeed[0] && !g_NavSeed[1]) {
-					if (random() % 2 == 0) {
+					if (rngRandom() % 2 == 0) {
 						break;
 					}
 				} else {
@@ -416,7 +416,7 @@ struct waypoint *waypointChooseNeighbour(s32 *pointnums, s32 step, s32 groupnum,
 				}
 
 				if (!g_NavSeed[0] && !g_NavSeed[1]) {
-					if (random() % 2 == 0) {
+					if (rngRandom() % 2 == 0) {
 						break;
 					}
 				} else {
@@ -610,7 +610,7 @@ void waypointFindSegmentIntoGroup(struct waygroup *fromgroup, struct waygroup *t
 					}
 
 					if (!g_NavSeed[0] && !g_NavSeed[1]) {
-						if (random() % 2 == 0) {
+						if (rngRandom() % 2 == 0) {
 							break;
 						}
 					} else {
@@ -697,7 +697,7 @@ struct waypoint *waypointFindRandomAtStep(s32 *pointnums, s32 step)
 		len++;
 	}
 
-	randomindex = random() % len;
+	randomindex = rngRandom() % len;
 
 	for (i = randomindex; i < len; i++) {
 		struct waypoint *point = &g_StageSetup.waypoints[WPSEG_GET_ID(pointnums[i])];
@@ -728,7 +728,7 @@ struct waygroup *waygroupFindRandomAtStep(s32 *groupnums, s32 step)
 		len++;
 	}
 
-	randomindex = random() % len;
+	randomindex = rngRandom() % len;
 
 	for (i = randomindex; i < len; i++) {
 		struct waygroup *group = &g_StageSetup.waygroups[WPSEG_GET_ID(groupnums[i])];
diff --git a/src/game/pak.c b/src/game/pak.c
index 9927b22ad..b3e9c0350 100644
--- a/src/game/pak.c
+++ b/src/game/pak.c
@@ -370,7 +370,7 @@ u32 pakGenerateSerial(s8 device)
 	}
 
 	value = g_Paks[device].unk2c8;
-	rand = (random() % 496) + 16; // range 16-511
+	rand = (rngRandom() % 496) + 16; // range 16-511
 	count = osGetCount();
 
 	return value ^ rand ^ count;
@@ -2546,7 +2546,7 @@ s32 pakRepairFilesystem(s8 device)
 	}
 #else
 	if (device != SAVEDEVICE_GAMEPAK && g_Paks[device].serial == 0) {
-		g_Paks[device].serial = 0x10 + random() % 0x1ff0;
+		g_Paks[device].serial = 0x10 + rngRandom() % 0x1ff0;
 		return 0;
 	}
 #endif
@@ -2572,7 +2572,7 @@ void pakCorrupt(void)
 
 	for (i = 0; fileids[i] != 0; i++) {
 		for (j = 0; j < 8; j++) {
-			payload[j] = random() & 0xff;
+			payload[j] = rngRandom() & 0xff;
 		}
 
 		address = pakFindFile(SAVEDEVICE_GAMEPAK, fileids[i], &header);
@@ -3427,7 +3427,7 @@ s32 pakCreateFilesystem(s8 device)
 	s32 i;
 
 	for (i = 0; i < 32; i++) {
-		data[i] = random() & 0xff;
+		data[i] = rngRandom() & 0xff;
 	}
 
 	address = pakGetAlignedFileLenByBodyLen(device, pakGetBodyLenByType(device, PAKFILETYPE_TERMINATOR));
@@ -3436,7 +3436,7 @@ s32 pakCreateFilesystem(s8 device)
 #if VERSION >= VERSION_NTSC_1_0
 	g_Paks[device].serial = pakGenerateSerial(device);
 #else
-	g_Paks[device].serial = 0x10 + random() % 0x1ff0;
+	g_Paks[device].serial = 0x10 + rngRandom() % 0x1ff0;
 #endif
 	g_Paks[device].headercachecount = 0;
 
diff --git a/src/game/player.c b/src/game/player.c
index e5d7de700..9b8646793 100644
--- a/src/game/player.c
+++ b/src/game/player.c
@@ -328,7 +328,7 @@ f32 playerChooseSpawnLocation(f32 chrradius, struct coord *dstpos, RoomNum *dstr
 	// Look for pads that aren't bad (and therefore aren't very bad either) and
 	// are at least 10m away. For each pad added, set their distance to -1 so
 	// they don't get reused later.
-	i = random() % numpads;
+	i = rngRandom() % numpads;
 	p = i; \
 	while (sllen < 4) {
 		if (padsqdists[p] > 1000 * 1000 && !badpads[p]) {
@@ -367,7 +367,7 @@ f32 playerChooseSpawnLocation(f32 chrradius, struct coord *dstpos, RoomNum *dstr
 
 	// If the shortlist still has vacant slots, iterate the pads again but this
 	// time take the bad pads. Keep the very bad pads out of contention for now.
-	p = i = random() % numpads;
+	p = i = rngRandom() % numpads;
 
 	while (sllen < 4) {
 		if (padsqdists[p] > 1000 * 1000 && !verybadpads[p]) {
@@ -460,7 +460,7 @@ f32 playerChooseSpawnLocation(f32 chrradius, struct coord *dstpos, RoomNum *dstr
 
 	// Finally, choose a random pad from the shortlist
 	if (sllen > 0) {
-		p = random() % sllen;
+		p = rngRandom() % sllen;
 
 		dstpos->x = slpositions[p].x;
 		dstpos->y = slpositions[p].y;
@@ -471,7 +471,7 @@ f32 playerChooseSpawnLocation(f32 chrradius, struct coord *dstpos, RoomNum *dstr
 		dstangle = slangles[p];
 	} else {
 		// No shortlisted pads, so pick a random one from the full selection
-		padUnpack(pads[random() % numpads], PADFIELD_POS | PADFIELD_LOOK | PADFIELD_ROOM, &pad);
+		padUnpack(pads[rngRandom() % numpads], PADFIELD_POS | PADFIELD_LOOK | PADFIELD_ROOM, &pad);
 
 		dstrooms[0] = pad.room;
 		dstrooms[1] = -1;
@@ -1025,7 +1025,7 @@ void playerSpawn(void)
 					if (g_Vars.lvframenum > 0
 							&& (g_ChrSlots[i].hidden & CHRHFLAG_ONBONDSSCREEN)
 							&& func0f06b39c(&sp78, &sp90, &g_ChrSlots[i].prop->pos, modelGetEffectiveScale(g_ChrSlots[i].model))
-							&& (random() % 8)) {
+							&& (rngRandom() % 8)) {
 						sqdist += 1000 * 1000;
 					}
 
@@ -1061,7 +1061,7 @@ void playerSpawn(void)
 
 			// Randomly swap some of the earlier elements so the player
 			// doesn't always spawn into the closest
-			if (numsqdists > 1 && (random() % 2) == 0) {
+			if (numsqdists > 1 && (rngRandom() % 2) == 0) {
 				tmpchr = sortedchrs[0];
 				sqdist = sorteddists[0];
 				sortedchrs[0] = sortedchrs[1];
@@ -1070,7 +1070,7 @@ void playerSpawn(void)
 				sorteddists[1] = sqdist;
 			}
 
-			if (numsqdists > 2 && (random() % 4) == 0) {
+			if (numsqdists > 2 && (rngRandom() % 4) == 0) {
 				tmpchr = sortedchrs[0];
 				sqdist = sorteddists[0];
 				sortedchrs[0] = sortedchrs[2];
@@ -2829,7 +2829,7 @@ void playerTickExplode(void)
 
 		explosionCreateSimple(NULL, &pos, g_Vars.currentplayer->prop->rooms, EXPLOSIONTYPE_BONDEXPLODE, g_Vars.currentplayernum);
 
-		g_Vars.currentplayer->bondnextexplode = g_Vars.lvframe60 + TICKS(15) + (random() % TICKS(15));
+		g_Vars.currentplayer->bondnextexplode = g_Vars.lvframe60 + TICKS(15) + (rngRandom() % TICKS(15));
 	}
 }
 
@@ -4503,7 +4503,7 @@ void playerDisplayShield(void)
 	if (g_Vars.currentplayer->shieldshowtime < 0) {
 		s32 rand = ((g_Vars.currentplayer->shieldshowrnd >> 16) % 200) * 4 + 800;
 
-		g_Vars.currentplayer->shieldshowrnd = random();
+		g_Vars.currentplayer->shieldshowrnd = rngRandom();
 		g_Vars.currentplayer->shieldshowrot = g_Vars.thisframestart240 % rand;
 	}
 
@@ -5698,7 +5698,7 @@ void playerChooseThirdPersonAnimation(struct chrdata *chr, s32 crouchpos, f32 sp
 			animnum = prevanimnum;
 			speed = 0.5f;
 		} else {
-			animnum = g_DeathAnimations[random() % g_NumDeathAnimations];
+			animnum = g_DeathAnimations[rngRandom() % g_NumDeathAnimations];
 			speed = 0.5f;
 		}
 
diff --git a/src/game/playermgr.c b/src/game/playermgr.c
index 520b722ab..2b58e98ce 100644
--- a/src/game/playermgr.c
+++ b/src/game/playermgr.c
@@ -843,7 +843,7 @@ void playermgrShuffle(void)
 
 	// Randomly swap numbers with later elements
 	for (i = 0; i < MAX_PLAYERS - 1; i++) {
-		s32 otherindex = random() % (MAX_PLAYERS - i);
+		s32 otherindex = rngRandom() % (MAX_PLAYERS - i);
 		s32 tmp = g_Vars.playerorder[i];
 
 		g_Vars.playerorder[i] = g_Vars.playerorder[i + otherindex];
diff --git a/src/game/prop.c b/src/game/prop.c
index 64a34aa4f..78f962334 100644
--- a/src/game/prop.c
+++ b/src/game/prop.c
@@ -469,7 +469,7 @@ void weaponPlayWhooshSound(s32 weaponnum, struct prop *prop)
 	} else if (weaponnum == WEAPON_REAPER) {
 		// empty
 	} else if (weaponnum == WEAPON_COMBATKNIFE) {
-		soundnum = random() % 2 == 1 ? SFX_8060 : SFX_8061;
+		soundnum = rngRandom() % 2 == 1 ? SFX_8060 : SFX_8061;
 		speed = 1.05f - RANDOMFRAC() * 0.2f;
 	} else {
 		soundnum = SFX_0069;
@@ -518,7 +518,7 @@ void func0f060bac(s32 weaponnum, struct prop *prop)
 	if (weaponnum == WEAPON_UNARMED) {
 		soundnum = SFX_THUD_808F;
 
-		if ((random() % 2) == 1) {
+		if ((rngRandom() % 2) == 1) {
 			soundnum = SFX_THUD_8094;
 		}
 
@@ -533,7 +533,7 @@ void func0f060bac(s32 weaponnum, struct prop *prop)
 #else
 		soundnum = SFX_HIT_METAL_8079;
 
-		if (weaponnum != WEAPON_COMBATKNIFE && (random() % 2) == 1) {
+		if (weaponnum != WEAPON_COMBATKNIFE && (rngRandom() % 2) == 1) {
 			soundnum = SFX_HATHIT_807C;
 		}
 
@@ -847,7 +847,7 @@ struct prop *shotCalculateHits(s32 handnum, bool isshooting, struct coord *gunpo
 						&& shotdata.gset.weaponnum != WEAPON_LASER
 						&& shotdata.gset.weaponnum != WEAPON_TRANQUILIZER
 						&& shotdata.gset.weaponnum != WEAPON_FARSIGHT) {
-					texnum = random() % surfacetype->numwallhittexes;
+					texnum = rngRandom() % surfacetype->numwallhittexes;
 					texnum = surfacetype->wallhittexes[texnum];
 
 					if (texnum >= WALLHITTEX_GLASS1 && texnum <= WALLHITTEX_GLASS3) {
@@ -867,7 +867,7 @@ struct prop *shotCalculateHits(s32 handnum, bool isshooting, struct coord *gunpo
 				} else {
 					if (!chrIsUsingPaintball(g_Vars.currentplayer->prop->chr)) {
 						if (PLAYERCOUNT() >= 2) {
-							if ((random() % 8) == 0) {
+							if ((rngRandom() % 8) == 0) {
 								smokeCreateSimple(&sp694.pos, rooms2, SMOKETYPE_BULLETIMPACT);
 							}
 						} else {
@@ -877,7 +877,7 @@ struct prop *shotCalculateHits(s32 handnum, bool isshooting, struct coord *gunpo
 						}
 					}
 
-					if (PLAYERCOUNT() <= 2 || g_Vars.lvupdate240 <= 8 || (random() % 4) == 0) {
+					if (PLAYERCOUNT() <= 2 || g_Vars.lvupdate240 <= 8 || (rngRandom() % 4) == 0) {
 						if (sp694.pos.x > -32000 && sp694.pos.x < 32000
 								&& sp694.pos.y > -32000 && sp694.pos.y < 32000
 								&& sp694.pos.z > -32000 && sp694.pos.z < 32000) {
@@ -2400,18 +2400,18 @@ void propsTickPadEffects(void)
 					up.y = -pad.up.y;
 					up.z = -pad.up.z;
 
-					if ((random() % 2048) <= 50) {
+					if ((rngRandom() % 2048) <= 50) {
 						sparksCreate(rooms[0], NULL, &pad.pos, &up, &pad.up, SPARKTYPE_ENVIRONMENTAL1);
 						psCreate(NULL, NULL, psGetRandomSparkSound(), -1, -1, 0, 0, PSTYPE_NONE, &pad.pos, -1, rooms, -1, -1, -1, -1);
 					}
 
-					if ((random() % 2048) <= 15) {
+					if ((rngRandom() % 2048) <= 15) {
 						sparksCreate(rooms[0], NULL, &pad.pos, &up, &pad.up, SPARKTYPE_ENVIRONMENTAL1);
 						sparksCreate(rooms[0], NULL, &pad.pos, &up, &pad.up, SPARKTYPE_ENVIRONMENTAL2);
 						psCreate(NULL, NULL, psGetRandomSparkSound(), -1, -1, 0, 0, PSTYPE_NONE, &pad.pos, -1, rooms, -1, -1, -1, -1);
 					}
 
-					if ((random() % 2048) <= 5) {
+					if ((rngRandom() % 2048) <= 5) {
 						sparksCreate(rooms[0], NULL, &pad.pos, &up, &pad.up, SPARKTYPE_ENVIRONMENTAL1);
 						sparksCreate(rooms[0], NULL, &pad.pos, &up, &pad.up, SPARKTYPE_ENVIRONMENTAL3);
 						psCreate(NULL, NULL, psGetRandomSparkSound(), -1, -1, 0, 0, PSTYPE_NONE, &pad.pos, -1, rooms, -1, -1, -1, -1);
diff --git a/src/game/propobj.c b/src/game/propobj.c
index 73d97eeec..358eda12d 100644
--- a/src/game/propobj.c
+++ b/src/game/propobj.c
@@ -1105,7 +1105,7 @@ struct projectile *projectileAllocate(void)
 
 	// If there were none, pick one at random
 	if (bestindex == -1 && g_MaxProjectiles) {
-		bestindex = random() % g_MaxProjectiles;
+		bestindex = rngRandom() % g_MaxProjectiles;
 	}
 
 	if (bestindex >= 0) {
@@ -1524,7 +1524,7 @@ s32 func0f068fc8(struct prop *prop, bool arg1)
 	s32 *extraptr;
 
 	if (prop->rooms[0] == -1) {
-		actual = random() % 255;
+		actual = rngRandom() % 255;
 		extra = 0;
 	} else if (obj->type == OBJTYPE_DOOR) {
 		struct doorobj *door = (struct doorobj *)obj;
@@ -3738,7 +3738,7 @@ void projectileFall(struct defaultobj *obj, f32 arg1[3][3])
 						t4 = NEXT(i);
 						t3 = PREV(i);
 					} else {
-						if ((random() % 2) == 0) {
+						if ((rngRandom() % 2) == 0) {
 							t4 = PREV(i);
 							t3 = NEXT(i);
 						} else {
@@ -3890,7 +3890,7 @@ void knifePlayWooshSound(struct defaultobj *obj)
 				&& obj->projectile->bouncecount <= 0
 				&& (obj->hidden & OBJHFLAG_THROWNKNIFE)) {
 			u16 soundnums[] = { SFX_8074, SFX_8074, SFX_8074 };
-			s32 index = random() % ARRAYCOUNT(soundnums);
+			s32 index = rngRandom() % ARRAYCOUNT(soundnums);
 
 			if (obj->projectile->lastwooshframe < g_Vars.lvframe60 - TICKS(6)) {
 				psStopSound(obj->prop, PSTYPE_GENERAL, 0xffff);
@@ -4039,7 +4039,7 @@ void knifeLand(struct defaultobj *obj, struct coord *arg1, struct coord *arg2)
 
 	// @bug? Should these be assigned to zero?
 	objGetLocalZMin(bbox);
-	random();
+	rngRandom();
 
 	sp1c.x = RANDOMFRAC() * 0.8f + arg2->x - 0.4f;
 	sp1c.y = RANDOMFRAC() * 0.8f + arg2->y - 0.4f;
@@ -7437,7 +7437,7 @@ s32 projectileTick(struct defaultobj *obj, bool *embedded)
 								} else if (weapon->weaponnum == WEAPON_GRENADE && weapon->gunfunc == FUNC_SECONDARY) {
 									u16 sp100[] = {SFX_0027, SFX_0028, SFX_0029, SFX_002A};
 
-									psCreate(0, prop, sp100[random() % 4], -1, -1, 0, 0, PSTYPE_NONE, 0, -1.0f, 0, -1, -1.0f, -1.0f, -1.0f);
+									psCreate(0, prop, sp100[rngRandom() % 4], -1, -1, 0, 0, PSTYPE_NONE, 0, -1.0f, 0, -1, -1.0f, -1.0f, -1.0f);
 									psCreate(0, prop, SFX_EYESPYHIT, -1, -1, 0, 0, PSTYPE_NONE, 0, -1.0f, 0, -1, -1.0f, -1.0f, -1.0f);
 								} else {
 									psCreate(0, prop, SFX_EYESPYHIT, -1, -1, 0, 0, PSTYPE_NONE, 0, -1.0f, 0, -1, -1.0f, -1.0f, -1.0f);
@@ -9296,10 +9296,10 @@ void autogunTickShoot(struct prop *autogunprop)
 
 								missed = false;
 
-								if (random() % 2) {
-									hitpos.y += 2 + (random() % 10);
+								if (rngRandom() % 2) {
+									hitpos.y += 2 + (rngRandom() % 10);
 								} else {
-									hitpos.y -= 2 + (random() % 10);
+									hitpos.y -= 2 + (rngRandom() % 10);
 								}
 
 								bgunPlayPropHitSound(&gset, targetprop, -1);
@@ -9658,7 +9658,7 @@ void chopperFireRocket(struct chopperobj *chopper, bool side)
 		pos.z = sp6c.m[3][2] + chopperprop->pos.f[2];
 
 		direction.x = targetprop->pos.x - pos.x;
-		direction.y = targetprop->pos.y - pos.y + (s32)(random() % 100);
+		direction.y = targetprop->pos.y - pos.y + (s32)(rngRandom() % 100);
 		direction.z = targetprop->pos.z - pos.z;
 
 		guNormalize(&direction.x, &direction.y, &direction.z);
@@ -9699,8 +9699,8 @@ void chopperIncrementBarrel(struct prop *chopperprop, bool firing)
 		rodata = modelGetPartRodata(model->definition, MODELPART_CHOPPER_0001);
 		gunaimy = targetprop->pos.y - 20.0f;
 
-		gunpos.x = random() * random() * 0 * 30.0f + rodata->pos.x;
-		gunpos.y = random() * 0 * 30.0f + (rodata->pos.y - 50.0f);
+		gunpos.x = rngRandom() * rngRandom() * 0 * 30.0f + rodata->pos.x;
+		gunpos.y = rngRandom() * 0 * 30.0f + (rodata->pos.y - 50.0f);
 		gunpos.z = rodata->pos.z + 250.0f;
 
 		if (obj->modelnum == MODEL_A51INTERCEPTOR) {
@@ -9869,7 +9869,7 @@ void chopperIncrementMovement(struct prop *prop, f32 goalroty, f32 goalrotx, str
 
 	if (chopper->bob > M_BADTAU) {
 		chopper->bob = 0.0f;
-		chopper->bobstrength = ((random() % 8) + 2) * 0.01f;
+		chopper->bobstrength = ((rngRandom() % 8) + 2) * 0.01f;
 
 		if (chopper->base.flags & OBJFLAG_CHOPPER_INACTIVE) {
 			chopper->bobstrength *= 0.15f;
@@ -10102,7 +10102,7 @@ void chopperTickFall(struct prop *chopperprop)
 		if (bob > M_BADTAU) {
 			bob = 0;
 
-			chopper->bobstrength = (random() % 8 + 2) * 0.01f;
+			chopper->bobstrength = (rngRandom() % 8 + 2) * 0.01f;
 
 			if (obj->flags & OBJFLAG_CHOPPER_INACTIVE) {
 				chopper->bobstrength *= 0.15f;
@@ -13176,7 +13176,7 @@ Gfx *tvscreenRender(struct model *model, struct modelnode *node, struct tvscreen
 				tvscreenSetCmdlist(screen, (u32 *) cmd->arg1);
 				break;
 			case TVCMD_RANDSETCMDLIST:
-				if ((random() >> 16) < cmd->arg2) {
+				if ((rngRandom() >> 16) < cmd->arg2) {
 					tvscreenSetCmdlist(screen, (u32 *) cmd->arg1);
 				} else {
 					screen->offset += 3;
@@ -13951,7 +13951,7 @@ void objDeform(struct defaultobj *obj, s32 level)
 	if (debugIsObjDeformDebugEnabled());
 	if (debugIsObjDeformDebugEnabled());
 
-	salt = random();
+	salt = rngRandom();
 
 	if (debugIsObjDeformDebugEnabled()) {
 		salt &= 0xffff;
@@ -15546,7 +15546,7 @@ void objDamage(struct defaultobj *obj, f32 damage, struct coord *pos, s32 weapon
 			if (objGetDestroyedLevel(obj) == 1) {
 				u32 stack;
 				struct multiammocrateobj *crate = (struct multiammocrateobj *) obj;
-				s32 startindex = random() % ARRAYCOUNT(crate->slots);
+				s32 startindex = rngRandom() % ARRAYCOUNT(crate->slots);
 				s32 i = startindex;
 
 				do {
@@ -15888,7 +15888,7 @@ void objHit(struct shotdata *shotdata, struct hit *hit)
 			struct prop *hitprop = hit->prop;
 			s8 iswindoweddoor = obj->model->definition->skel == &g_SkelWindowedDoor ? true : false;
 
-			textureindex = WALLHITTEX_GLASS1 + (random() % 3);
+			textureindex = WALLHITTEX_GLASS1 + (rngRandom() % 3);
 
 			if ((obj->type == OBJTYPE_DOOR && !iswindoweddoor)
 					|| (obj->flags & OBJFLAG_INVINCIBLE)
@@ -15916,7 +15916,7 @@ void objHit(struct shotdata *shotdata, struct hit *hit)
 
 			if (surfacetype->numwallhittexes > 0) {
 				spc4 = false;
-				spcc = random() % surfacetype->numwallhittexes;
+				spcc = rngRandom() % surfacetype->numwallhittexes;
 
 				if ((obj->model->definition->skel == &g_SkelWindowedDoor && hit->dlnode == modelGetPart(obj->model->definition, MODELPART_WINDOWEDDOOR_0003))
 						|| (obj->model->definition->skel == &g_SkelCctv && hit->dlnode == modelGetPart(obj->model->definition, MODELPART_CCTV_LENS))) {
@@ -20175,7 +20175,7 @@ void doorCreateSparks(struct doorobj *door)
 
 	sparksCreate(door->base.prop->rooms[0], door->base.prop, &sp7c, &sp70, &pad.up, SPARKTYPE_ENVIRONMENTAL1);
 
-	if (random() % 2) {
+	if (rngRandom() % 2) {
 		sparksCreate(door->base.prop->rooms[0], door->base.prop, &sp88, &sp70, &pad.up, SPARKTYPE_ENVIRONMENTAL4);
 	} else {
 		sparksCreate(door->base.prop->rooms[0], door->base.prop, &sp88, &sp70, &pad.up, SPARKTYPE_ENVIRONMENTAL5);
@@ -20225,7 +20225,7 @@ bool doorCalcIntendedFrac(struct doorobj *door)
 
 		// Skedar Ruins random door stuckage
 		if (door->base.flags3 & OBJFLAG3_DOOR_STICKY) {
-			s32 value = (random() % 64) + 30;
+			s32 value = (rngRandom() % 64) + 30;
 
 #ifndef PLATFORM_N64 // emulate low fps cal rate for stuckage test
 			if (((g_Vars.lvframenum % value) == 0)
@@ -20239,7 +20239,7 @@ bool doorCalcIntendedFrac(struct doorobj *door)
 				door->fracspeed = 0.0f;
 				doorCreateSparks(door);
 
-				if (random() % 2) {
+				if (rngRandom() % 2) {
 					dothething = true;
 					psStopSound(door->base.prop, PSTYPE_DOOR, 0xffff);
 					door->mode = DOORMODE_IDLE;
@@ -20249,7 +20249,7 @@ bool doorCalcIntendedFrac(struct doorobj *door)
 				loopdoor = door;
 
 				while (loopdoor) {
-					if (random() % 2 && loopdoor->mode != DOORMODE_IDLE) {
+					if (rngRandom() % 2 && loopdoor->mode != DOORMODE_IDLE) {
 						loopdoor->fracspeed = 0.0f;
 						doorCreateSparks(loopdoor);
 
@@ -21499,10 +21499,10 @@ void projectileCreate(struct prop *fromprop, struct fireslotthing *arg1, struct
 						endpos.y = targetprop->pos.y;
 						endpos.z = targetprop->pos.z;
 
-						if (random() % 2) {
-							endpos.y += (random() % 10) + 2;
+						if (rngRandom() % 2) {
+							endpos.y += (rngRandom() % 10) + 2;
 						} else {
-							endpos.y -= (random() % 10) + 2;
+							endpos.y -= (rngRandom() % 10) + 2;
 						}
 
 						bgunPlayPropHitSound(&gset, targetprop, -1);
diff --git a/src/game/propsnd.c b/src/game/propsnd.c
index 5125fe70e..7f04bab9c 100644
--- a/src/game/propsnd.c
+++ b/src/game/propsnd.c
@@ -1486,7 +1486,7 @@ void psApplyVolPan(struct sndstate *handle, struct coord *pos, f32 dist1, f32 di
 
 s32 psGetRandomSparkSound(void)
 {
-	s32 index = random() % 6;
+	s32 index = rngRandom() % 6;
 
 	s16 sounds[] = {
 		SFX_80B0,
diff --git a/src/game/setup.c b/src/game/setup.c
index 4cfa61cd7..8d281552e 100644
--- a/src/game/setup.c
+++ b/src/game/setup.c
@@ -2067,7 +2067,7 @@ void setupCreateProps(s32 stagenum)
 				}
 
 				for (i = 0; i < maxsimulants; i++) {
-					slotnum = random() % maxsimulants;
+					slotnum = rngRandom() % maxsimulants;
 
 					while (slotsdone[slotnum]) {
 						slotnum = (slotnum + 1) % maxsimulants;
@@ -2227,7 +2227,7 @@ void setupCreateProps(s32 stagenum)
 							// for storing OBJHFLAG_CONDITIONALSCENERY, which is required
 							// for a match. Any function call would work.
 							if (alwayszero) {
-								random();
+								rngRandom();
 							}
 
 							if (expoffset) {
diff --git a/src/game/shards.c b/src/game/shards.c
index 729579654..4fe3c4ca5 100644
--- a/src/game/shards.c
+++ b/src/game/shards.c
@@ -88,7 +88,7 @@ void shardsCreate(struct coord *pos, f32 *rotx, f32 *roty, f32 *rotz, f32 relxmi
 		 * when you shoot the bottles, half of them don't play any breaking
 		 * sound effect.
 		 */
-		psCreate(NULL, NULL, SFX_BOTTLE_BREAK + (random() % 2) * 2, -1,
+		psCreate(NULL, NULL, SFX_BOTTLE_BREAK + (rngRandom() % 2) * 2, -1,
 				-1, 0, 0, PSTYPE_NONE, &prop->pos, -1.0f, prop->rooms, -1, -1.0f, -1.0f, -1.0f);
 	} else if (type == SHARDTYPE_WOOD) {
 		psCreate(NULL, NULL, SFX_WOOD_BREAK, -1,
@@ -145,7 +145,7 @@ void shardCreate(RoomNum room, struct coord *pos, f32 rotx, f32 size, s32 type)
 	}
 
 	if (type == SHARDTYPE_WOOD) {
-		s32 rand = random() % 100;
+		s32 rand = rngRandom() % 100;
 
 		if (rand < 20) {
 			g_Shards[g_NextShardNum].colours[0].word = PD_BE32(0xbbbbbbf0);
@@ -182,7 +182,7 @@ void shardCreate(RoomNum room, struct coord *pos, f32 rotx, f32 size, s32 type)
 
 		for (i = 0; i < 3; i++) {
 			for (j = 0; j < 3; j++) {
-				g_Shards[g_NextShardNum].colours[i].bytes[j] = random() % 0xff;
+				g_Shards[g_NextShardNum].colours[i].bytes[j] = rngRandom() % 0xff;
 			}
 		}
 
diff --git a/src/game/smoke.c b/src/game/smoke.c
index edc7d5e37..e065c7d9a 100644
--- a/src/game/smoke.c
+++ b/src/game/smoke.c
@@ -499,7 +499,7 @@ u32 smokeTick(struct prop *prop)
 							part->size = g_SmokeTypes[smoke->type].size * (RANDOMFRAC() * 0.5f + 1.0f);
 						}
 
-						part->alpha = (random() % 70) + 110.0f;
+						part->alpha = (rngRandom() % 70) + 110.0f;
 						part->count = 0;
 						part->rot = RANDOMFRAC() * M_BADTAU;
 						part->deltarot = (0.5f - RANDOMFRAC()) * g_SmokeTypes[smoke->type].bgrotatespeed;
diff --git a/src/game/sparks.c b/src/game/sparks.c
index 993232b1e..7f6f8f335 100644
--- a/src/game/sparks.c
+++ b/src/game/sparks.c
@@ -107,9 +107,9 @@ void sparkCreate(struct coord *pos, struct sparktype *type)
 	spark->pos.y = 0.0f;
 	spark->pos.z = 0.0f;
 
-	spark->speed.x = (s32)(random() % (type->unk00 * 2 + 1)) - type->unk00;
-	spark->speed.y = (s32)(random() % (type->unk00 * 2 + 1)) - type->unk00;
-	spark->speed.z = (s32)(random() % (type->unk00 * 2 + 1)) - type->unk00;
+	spark->speed.x = (s32)(rngRandom() % (type->unk00 * 2 + 1)) - type->unk00;
+	spark->speed.y = (s32)(rngRandom() % (type->unk00 * 2 + 1)) - type->unk00;
+	spark->speed.z = (s32)(rngRandom() % (type->unk00 * 2 + 1)) - type->unk00;
 
 	if (spark->speed.y == 0.0f) {
 		spark->speed.y = -0.0001f;
@@ -148,7 +148,7 @@ void sparkCreate(struct coord *pos, struct sparktype *type)
 	}
 
 	if (type->unk18 % 2) {
-		spark->ttl = random() % type->maxage;
+		spark->ttl = rngRandom() % type->maxage;
 	} else {
 		spark->ttl = type->maxage;
 	}
@@ -195,16 +195,16 @@ void sparksCreate(s32 room, struct prop *prop, struct coord *pos, struct coord *
 			type->unk20 = colours[2];
 		}
 	} else if (typenum == SPARKTYPE_PAINT) {
-		type->unk1c = (random() % 2 ? 0xff000000 : 0) | (random() % 2 ? 0x00ff0000 : 0) | (random() % 2 ? 0x0000ff00 : 0) | 0xff;
+		type->unk1c = (rngRandom() % 2 ? 0xff000000 : 0) | (rngRandom() % 2 ? 0x00ff0000 : 0) | (rngRandom() % 2 ? 0x0000ff00 : 0) | 0xff;
 
 		if (type->unk1c == 0x000000ff) {
-			type->unk1c |= 0x0000ff00 << ((random() % 3) * 8);
+			type->unk1c |= 0x0000ff00 << ((rngRandom() % 3) * 8);
 		}
 
-		type->unk20 = (random() % 2 ? 0xff000000 : 0) | (random() % 2 ? 0x00ff0000 : 0) | (random() % 2 ? 0x0000ff00 : 0) | 0xff;
+		type->unk20 = (rngRandom() % 2 ? 0xff000000 : 0) | (rngRandom() % 2 ? 0x00ff0000 : 0) | (rngRandom() % 2 ? 0x0000ff00 : 0) | 0xff;
 
 		if (type->unk20 == 0xff) {
-			type->unk20 |= 0x0000ff00 << ((random() % 3) * 8);
+			type->unk20 |= 0x0000ff00 << ((rngRandom() % 3) * 8);
 		}
 	}
 
diff --git a/src/game/splat.c b/src/game/splat.c
index ce9c6bb96..3bcc598c3 100644
--- a/src/game/splat.c
+++ b/src/game/splat.c
@@ -89,7 +89,7 @@ void splatTickChr(struct prop *prop)
 			if (thudframe != -1.0f && modelGetCurAnimFrame(chr->model) < thudframe) {
 				osSyncPrintf("SPLAT : Not Dead Enough %s%s%f", "", "", modelGetCurAnimFrame(chr->model));
 			} else if (chr->tickssincesplat > TICKS(30) && chr->deaddropsplatsadded < 6) {
-				chr->deaddropsplatsadded += splatsCreate(1, 1.1f, prop, NULL, 0, 0, isskedar, SPLATTYPE_PUDDLE, TICKS(150), attacker, random() & 8);
+				chr->deaddropsplatsadded += splatsCreate(1, 1.1f, prop, NULL, 0, 0, isskedar, SPLATTYPE_PUDDLE, TICKS(150), attacker, rngRandom() & 8);
 			}
 		} else {
 			// Consider creating a wounded drop
@@ -134,7 +134,7 @@ void splatsCreateForChrHit(struct prop *prop, struct shotdata *shotdata, struct
 	}
 
 	if (splattype == 0) {
-		u32 qty = random() % 3;
+		u32 qty = rngRandom() % 3;
 
 		if (qty) {
 			chr->stdsplatsadded += splatsCreate(qty, 0.8f, prop, shotdata, arg2, arg3, isskedar, splattype, TICKS(50), chr2, 0);
@@ -424,7 +424,7 @@ void splat0f14986c(struct splatdata *splat)
 	f32 distance;
 	RoomNum smokerooms[2];
 
-	texnum = WALLHITTEX_BLOOD1 + (random() % 3);
+	texnum = WALLHITTEX_BLOOD1 + (rngRandom() % 3);
 
 	if (splat->objprop != NULL && splat->objprop->type == PROPTYPE_OBJ) {
 		obj = splat->objprop->obj;
@@ -437,14 +437,14 @@ void splat0f14986c(struct splatdata *splat)
 
 	switch (splat->splattype) {
 	case SPLATTYPE_PUDDLE:
-		texnum = WALLHITTEX_BLOOD1 + (random() % 3);
+		texnum = WALLHITTEX_BLOOD1 + (rngRandom() % 3);
 		break;
 	case SPLATTYPE_DROP:
-		texnum = WALLHITTEX_BLOOD4 + (random() % 1);
+		texnum = WALLHITTEX_BLOOD4 + (rngRandom() % 1);
 		break;
 	}
 
-	switch (random() % 6) {
+	switch (rngRandom() % 6) {
 	case 0:
 	case 1:
 	case 2:
@@ -501,7 +501,7 @@ void splat0f14986c(struct splatdata *splat)
 			NULL, texnum, splat->room, splat->objprop,
 			splat->chrprop, splat->mtxindex, 0, splat->chr,
 			width, height, minalpha, maxalpha,
-			random() % 360, (u16)splat->timermax, splat->timerspeed, translucent);
+			rngRandom() % 360, (u16)splat->timermax, splat->timerspeed, translucent);
 
 	if (sp88 || sp84) {
 		smokerooms[0] = splat->room;
diff --git a/src/game/training.c b/src/game/training.c
index 5d2bac4d2..18ccbb18c 100644
--- a/src/game/training.c
+++ b/src/game/training.c
@@ -588,10 +588,10 @@ struct frdata *frGetData(void)
 u32 frResolveFrPad(u32 arg0)
 {
 	switch (arg0) {
-	case 31: return random() % 9 + 4;  // 4 - 12
-	case 32: return random() % 9 + 13; // 13 - 21
-	case 33: return random() % 9 + 22; // 22 - 30
-	case 34: return random() % 27 + 4; // 4 - 30
+	case 31: return rngRandom() % 9 + 4;  // 4 - 12
+	case 32: return rngRandom() % 9 + 13; // 13 - 21
+	case 33: return rngRandom() % 9 + 22; // 22 - 30
+	case 34: return rngRandom() % 27 + 4; // 4 - 30
 	}
 
 	return g_FrData.padindexoffset + arg0;
diff --git a/src/game/vtxstore.c b/src/game/vtxstore.c
index 4999ea6de..d82b94304 100644
--- a/src/game/vtxstore.c
+++ b/src/game/vtxstore.c
@@ -189,7 +189,7 @@ void *vtxstoreAllocate(s32 count, s32 index, struct modelnode *node, s32 level)
 				chrs[tally] = chr;
 				tally++;
 			} else {
-				rand = random() % tally;
+				rand = rngRandom() % tally;
 				chrFadeCorpseWhenOffScreen(chrs[rand]);
 				chrs[rand] = chr;
 			}
@@ -202,7 +202,7 @@ void *vtxstoreAllocate(s32 count, s32 index, struct modelnode *node, s32 level)
 	rand = tally >> 1;
 
 	while (rand) {
-		i = random() % tally;
+		i = rngRandom() % tally;
 
 		if (chrs[i]) {
 			chrFadeCorpseWhenOffScreen(chrs[i]);
diff --git a/src/game/wallhit.c b/src/game/wallhit.c
index 393dbb1b1..30284ec84 100644
--- a/src/game/wallhit.c
+++ b/src/game/wallhit.c
@@ -217,7 +217,7 @@ bool chrIsUsingPaintball(struct chrdata *chr)
 	if (chr && chr->prop && chr->prop->type == PROPTYPE_PLAYER) {
 		setCurrentPlayerNum(playermgrGetPlayerNumByProp(chr->prop));
 	} else {
-		setCurrentPlayerNum(random() % PLAYERCOUNT());
+		setCurrentPlayerNum(rngRandom() % PLAYERCOUNT());
 	}
 
 	paintball = optionsGetPaintball(g_Vars.currentplayerstats->mpindex);
@@ -720,7 +720,7 @@ void wallhitCreateWith20Args(struct coord *relpos, struct coord *arg1, struct co
 	case WALLHITTEX_SCORCH:
 	case WALLHITTEX_PAINT:
 	case WALLHITTEX_WOOD:
-		rotdeg = random() % 360;
+		rotdeg = rngRandom() % 360;
 		break;
 	}
 
@@ -741,7 +741,7 @@ void wallhitCreateWith20Args(struct coord *relpos, struct coord *arg1, struct co
 	default:
 	case WALLHITTEX_SCORCH:
 	case WALLHITTEX_WOOD:
-		rotdeg = random() % 360;
+		rotdeg = rngRandom() % 360;
 		break;
 	}
 
@@ -751,7 +751,7 @@ void wallhitCreateWith20Args(struct coord *relpos, struct coord *arg1, struct co
 			height = 15.0f;
 		}
 
-		rotdeg = random() % 360;
+		rotdeg = rngRandom() % 360;
 		type = WALLHITTYPE_PAINT;
 		timermax = TICKS(10);
 	} else {
@@ -1083,7 +1083,7 @@ void wallhitCreateWith20Args(struct coord *relpos, struct coord *arg1, struct co
 			range = maxalpha - (u32)minalpha;
 
 			if (range) {
-				alpha = minalpha + (random() % range);
+				alpha = minalpha + (rngRandom() % range);
 			} else {
 				alpha = 0;
 			}
@@ -1091,16 +1091,16 @@ void wallhitCreateWith20Args(struct coord *relpos, struct coord *arg1, struct co
 			for (i = 0; i < ARRAYCOUNT(wallhit->basecolours); i++) {
 				switch (type) {
 				case WALLHITTYPE_BULLET:
-					r = g = b = 255 - (random() % 40);
+					r = g = b = 255 - (rngRandom() % 40);
 					a = alpha ? alpha : 255;
 					break;
 				case WALLHITTYPE_SOFT:
-					r = g = b = random() % 70;
-					a = alpha ? alpha : 255 - (random() % 50);
+					r = g = b = rngRandom() % 70;
+					a = alpha ? alpha : 255 - (rngRandom() % 50);
 					break;
 				case WALLHITTYPE_SCORCH:
-					r = g = b = random() % 50;
-					a = alpha ? alpha : 255 - (random() % 80);
+					r = g = b = rngRandom() % 50;
+					a = alpha ? alpha : 255 - (rngRandom() % 80);
 					break;
 				case WALLHITTYPE_BLOOD:
 					r = g_WallhitBloodColour[0];
@@ -1109,9 +1109,9 @@ void wallhitCreateWith20Args(struct coord *relpos, struct coord *arg1, struct co
 					a = alpha ? alpha : 255;
 					break;
 				case WALLHITTYPE_PAINT:
-					r = (random() % 2) ? 0xff : 0;
-					g = (random() % 2) ? 0xff : 0;
-					b = (random() % 2) ? 0xff : 0;
+					r = (rngRandom() % 2) ? 0xff : 0;
+					g = (rngRandom() % 2) ? 0xff : 0;
+					b = (rngRandom() % 2) ? 0xff : 0;
 					a = alpha ? alpha : 255;
 					break;
 				default:
@@ -1486,7 +1486,7 @@ void wallhitFadeSplatsForRemovedChr(struct prop *chrprop)
 				&& wallhit->roomnum > 0
 				&& wallhit->chrprop == chrprop
 				&& g_WallhitTexes[wallhit->texturenum].type == WALLHITTYPE_BLOOD) {
-			if (IS_BLOOD_DROP(wallhit->texturenum) || (random() % 100) < 35) {
+			if (IS_BLOOD_DROP(wallhit->texturenum) || (rngRandom() % 100) < 35) {
 				wallhitFade(wallhit, TICKS(120));
 			} else {
 				wallhit->createdframe = g_Vars.lvframenum;
diff --git a/src/game/weather.c b/src/game/weather.c
index 9a95769d6..6d1416696 100644
--- a/src/game/weather.c
+++ b/src/game/weather.c
@@ -311,10 +311,10 @@ struct weatherparticledata *weatherAllocateParticles(void)
 void func0f131610(struct weatherdata *weather)
 {
 	weather->unk94 = 0;
-	weather->unk98 = (random() & 7) + 1;
-	weather->unk9c = (random() & 7) + 1;
-	weather->unka0 = (random() & 7) + 1;
-	weather->unka4 = (random() & 0xf) + 10;
+	weather->unk98 = (rngRandom() & 7) + 1;
+	weather->unk9c = (rngRandom() & 7) + 1;
+	weather->unka0 = (rngRandom() & 7) + 1;
+	weather->unka4 = (rngRandom() & 0xf) + 10;
 }
 
 void func0f131678(s32 arg0)
diff --git a/src/include/constants.h b/src/include/constants.h
index 2fd08e73f..54cfee47d 100644
--- a/src/include/constants.h
+++ b/src/include/constants.h
@@ -70,7 +70,7 @@
 #define LINEHEIGHT          (VERSION == VERSION_JPN_FINAL ? 14 : 11)
 #define MIXCOLOUR(dialog, property) dialog->transitionfrac < 0.0f ? g_MenuColours[dialog->type].property : colourBlend(g_MenuColours[dialog->type2].property, g_MenuColours[dialog->type].property, dialog->colourweight)
 #define MPCHR(index)        ((index) < MAX_PLAYERS ? &g_PlayerConfigsArray[index].base : &g_BotConfigsArray[(index) - MAX_PLAYERS].base)
-#define RANDOMFRAC()        (random() * (1.0f / U32_MAX))
+#define RANDOMFRAC()        (rngRandom() * (1.0f / U32_MAX))
 #define SECSTOTIME240(secs) (secs * 240)
 #define SECSTOTIME60(secs)  (secs * 60)
 #define PFS(device)         (device == SAVEDEVICE_GAMEPAK ? NULL : &g_Pfses[device])
diff --git a/src/include/lib/rng.h b/src/include/lib/rng.h
index 32741640f..647c496a5 100644
--- a/src/include/lib/rng.h
+++ b/src/include/lib/rng.h
@@ -4,7 +4,7 @@
 #include "data.h"
 #include "types.h"
 
-u32 random(void);
+u32 rngRandom(void);
 u32 rngRotateSeed(u64 *value);
 
 #endif
diff --git a/src/lib/model.c b/src/lib/model.c
index 929f5c7b4..7ad23e2b1 100644
--- a/src/lib/model.c
+++ b/src/lib/model.c
@@ -3296,11 +3296,11 @@ void modelRenderNodeStarGunfire(struct modelrenderdata *renderdata, struct model
 			gSPDisplayList(renderdata->gdl++, rodata->gdl);
 
 			for (i = 0; i < rodata->unk00; i++) {
-				u16 rand1 = (random() << 10) & 0xffff;
+				u16 rand1 = (rngRandom() << 10) & 0xffff;
 				s32 s4 = ((coss(rand1) << 5) * 181) >> 18;
 				s32 s3 = ((sins(rand1) << 5) * 181) >> 18;
-				s32 s1 = random() >> 31;
-				s32 mult = 0x10000 - (random() & 0x3fff);
+				s32 s1 = rngRandom() >> 31;
+				s32 mult = 0x10000 - (rngRandom() & 0x3fff);
 				s32 corner1 = 0x200 + s3;
 				s32 corner2 = 0x200 - s3;
 				s32 corner3 = 0x200 - s4;
@@ -3414,7 +3414,7 @@ void modelRenderNodeChrGunfire(struct modelrenderdata *renderdata, struct model
 		rot2 = cosf(spec);
 		spd0 = sinf(spec);
 
-		scale = 0.75f + (random() % 128) * (1.0f / 256.0f); // 0.75 to 1.25
+		scale = 0.75f + (rngRandom() % 128) * (1.0f / 256.0f); // 0.75 to 1.25
 
 		sp9c.f[0] = rodata->dim.f[0] * scale;
 		sp9c.f[1] = rodata->dim.f[1] * scale;
@@ -3469,7 +3469,7 @@ void modelRenderNodeChrGunfire(struct modelrenderdata *renderdata, struct model
 
 			tconfig = rodata->texture;
 
-			sp62 = (random() * 1024) & 0xffff;
+			sp62 = (rngRandom() * 1024) & 0xffff;
 			sp5c = (coss(sp62) * tconfig->width * 0xb5) >> 18;
 			sp58 = (sins(sp62) * tconfig->width * 0xb5) >> 18;
 
diff --git a/src/lib/rng_c.c b/src/lib/rng_c.c
index 6bee7e7f3..23ff7b619 100644
--- a/src/lib/rng_c.c
+++ b/src/lib/rng_c.c
@@ -10,7 +10,7 @@ u64 g_RngSeed = 0xab8d9f7781280783;
 /**
  * Generate a random number between 0 and 4294967295.
  */
-u32 random(void)
+u32 rngRandom(void)
 {
 	g_RngSeed = ((g_RngSeed << 63) >> 31 | (g_RngSeed << 31) >> 32) ^ (g_RngSeed << 44) >> 32;
 	g_RngSeed = ((g_RngSeed >> 20) & 0xfff) ^ g_RngSeed;
@@ -27,7 +27,7 @@ void rngSetSeed(u64 seed)
 }
 
 /**
- * Rotate the given seed using the same algorithm as random().
+ * Rotate the given seed using the same algorithm as rngRandom().
  *
  * Store the new 64-bit seed at the pointed address and return the same seed
  * cast as a u32.
diff --git a/src/lib/snd.c b/src/lib/snd.c
index ed76b4afa..61d66b726 100644
--- a/src/lib/snd.c
+++ b/src/lib/snd.c
@@ -1888,7 +1888,7 @@ void sndTick(void)
 			if (g_SndCurMp3.responsetimer240 <= 0) {
 				if (g_SndCurMp3.responsetype == MP3RESPONSETYPE_WHISPER) {
 					do {
-						index = random() % 4;
+						index = rngRandom() % 4;
 					} while (index == g_SndCurMp3.prevwhisper);
 
 					g_SndCurMp3.prevwhisper = index;
@@ -1901,7 +1901,7 @@ void sndTick(void)
 					}
 				} else if (g_SndCurMp3.responsetype == MP3RESPONSETYPE_ACKNOWLEDGE) {
 					do {
-						index = random() % 4;
+						index = rngRandom() % 4;
 					} while (index == g_SndCurMp3.prevacknowledge);
 
 					g_SndCurMp3.prevacknowledge = index;
@@ -1914,7 +1914,7 @@ void sndTick(void)
 					}
 				} else if (g_SndCurMp3.responsetype == MP3RESPONSETYPE_GREETING) {
 					do {
-						index = random() % 4;
+						index = rngRandom() % 4;
 					} while (index == g_SndCurMp3.prevgreeting);
 
 					g_SndCurMp3.prevgreeting = index;