diff --git a/data/json/itemgroups/item_groups.json b/data/json/itemgroups/item_groups.json
index 40b2af5509f2f..a42a2d835d307 100644
--- a/data/json/itemgroups/item_groups.json
+++ b/data/json/itemgroups/item_groups.json
@@ -5160,6 +5160,47 @@
       [ "chem_nitric_acid", 5 ]
     ]
   },
+  {
+    "type": "item_group",
+    "id": "mutagens",
+    "items": [
+      [ "mutagen", 8 ],
+      [ "mutagen_plant", 2 ],
+      [ "mutagen_insect", 2 ],
+      [ "mutagen_spider", 2 ],
+      [ "mutagen_fish", 2 ],
+      [ "mutagen_slime", 2 ],
+      [ "mutagen_rat", 2 ],
+      [ "mutagen_beast", 2 ],
+      [ "mutagen_cattle", 2 ],
+      [ "mutagen_cephalopod", 2 ],
+      [ "mutagen_bird", 2 ],
+      [ "mutagen_lizard", 2 ],
+      [ "mutagen_troglobite", 2 ],
+      [ "mutagen_ursine", 2 ],
+      [ "mutagen_feline", 2 ],
+      [ "mutagen_lupine", 2 ],
+      [ "iv_mutagen", 6 ],
+      [ "iv_mutagen_plant", 2 ],
+      [ "iv_mutagen_insect", 2 ],
+      [ "iv_mutagen_spider", 2 ],
+      [ "iv_mutagen_fish", 2 ],
+      [ "iv_mutagen_slime", 2 ],
+      [ "iv_mutagen_rat", 2 ],
+      [ "iv_mutagen_beast", 2 ],
+      [ "iv_mutagen_cattle", 2 ],
+      [ "iv_mutagen_cephalopod", 2 ],
+      [ "iv_mutagen_bird", 2 ],
+      [ "iv_mutagen_lizard", 2 ],
+      [ "iv_mutagen_troglobite", 2 ],
+      [ "iv_mutagen_ursine", 2 ],
+      [ "iv_mutagen_feline", 2 ],
+      [ "iv_mutagen_lupine", 2 ],
+      [ "purifier", 10 ],
+      [ "iv_purifier", 8 ],
+      [ "syringe", 8 ]
+    ]
+  },
   {
     "type": "item_group",
     "id": "mut_iv",
diff --git a/data/json/itemgroups/tools.json b/data/json/itemgroups/tools.json
index 80806cb9b1c5b..88c900ff246bc 100644
--- a/data/json/itemgroups/tools.json
+++ b/data/json/itemgroups/tools.json
@@ -383,6 +383,45 @@
       [ "acetylene_machine", 1 ]
     ]
   },
+  {
+    "type": "item_group",
+    "id": "tools_robotics",
+    "//": "tools and equipment you might find on robotics laboratories.",
+    "items": [
+      [ "recipe_lab_elec", 4 ],
+      [ "UPS_off", 6 ],
+      [ "file", 10 ],
+      [ "atomic_lamp", 1 ],
+      [ "control_laptop", 1 ],
+      [ "bot_manhack", 2 ],
+      [ "teleporter", 1 ],
+      [ "laptop", 4 ],
+      [ "plut_cell", 4 ],
+      [ "superglue", 30 ],
+      [ "pliers", 10 ],
+      [ "matches", 10 ],
+      [ "glasses_safety", 20 ],
+      [ "duct_tape", 8 ],
+      [ "misc_repairkit", 15 ],
+      [ "welder", 10 ],
+      [ "soldering_iron", 8 ],
+      [ "extinguisher", 10 ],
+      [ "magnifying_glass", 10 ],
+      [ "multitool", 20 ],
+      [ "screwdriver_set", 20 ],
+      [ "flashlight", 20 ],
+      [ "mobile_memory_card_science", 40 ],
+      [ "camera_pro", 2 ],
+      [ "element", 5 ],
+      [ "battery", 10 ],
+      [ "goggles_welding", 20 ],
+      [ "sm_extinguisher", 10 ],
+      [ "toolbox", 5 ],
+      [ "tool_belt", 10 ],
+      [ "hand_vice", 10 ],
+      [ "wrench", 10 ]
+    ]
+  },
   {
     "id": "hand_tools",
     "type": "item_group",
diff --git a/data/json/mapgen/microlab/microlab_connector.json b/data/json/mapgen/microlab/microlab_connector.json
new file mode 100644
index 0000000000000..816b7828222ce
--- /dev/null
+++ b/data/json/mapgen/microlab/microlab_connector.json
@@ -0,0 +1,274 @@
+[
+  {
+    "type": "mapgen",
+    "method": "json",
+    "om_terrain": [ "microlab_sub_connector" ],
+    "weight": 1000,
+    "object": {
+      "fill_ter": "t_concrete",
+      "rows": [
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################"
+      ],
+      "palettes": [ "microlab" ]
+    }
+  },
+  {
+    "type": "mapgen",
+    "method": "json",
+    "om_terrain": [ "microlab_rock_border" ],
+    "weight": 1000,
+    "object": {
+      "fill_ter": "t_concrete",
+      "rows": [
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################",
+        "########################"
+      ],
+      "palettes": [ "microlab" ]
+    }
+  },
+  {
+    "type": "mapgen",
+    "method": "json",
+    "om_terrain": [ "microlab_sub_station" ],
+    "weight": 1000,
+    "object": {
+      "fill_ter": "t_concrete",
+      "rows": [
+        "##|                  |##",
+        "##|^                 |##",
+        "##|^ hhhh  YY   hhhh |##",
+        "##|^                 |##",
+        "##|^ hhhh       hhhh |##",
+        "##|^                 |##",
+        "##|^          |^^^^^^|##",
+        "##||(((((|    ||||||||##",
+        "###|l h  ( YY |#########",
+        "###|l    ( YY |#########",
+        "###|l    (    |#########",
+        "###||2||||    |#########",
+        "###|     |    |#########",
+        "###|   hd|G55||#########",
+        "###|  ddd|   ^|#########",
+        "###||5(((|   ^|||||||###",
+        "###|B          VV ^^|###",
+        "###|B      YY      ?|###",
+        "###|B dddd YY    t ?|###",
+        "###|B d hd         ?|###",
+        "###|B          t? ^^|###",
+        "###||||||||  ||||||||###",
+        "##########|22|##########",
+        "##########|  |##########"
+      ],
+      "palettes": [ "microlab" ],
+      "terrain": { "G": "t_card_science" },
+      "items": {
+        "l": [ { "item": "guns_milspec", "chance": 10 }, { "item": "ammo_milspec", "chance": 70 } ],
+        "t": { "item": "magazines", "chance": 90 }
+      }
+    }
+  },
+  {
+    "type": "mapgen",
+    "method": "json",
+    "om_terrain": [ "microlab_generic_sub_entry" ],
+    "weight": 1000,
+    "object": {
+      "fill_ter": "t_concrete",
+      "rows": [
+        "|||||||||||  |||||||||||",
+        " cc  c    |  |^BBB|     ",
+        " cc  c   c|  |   h|r i  ",
+        "         c|  |  dd|r c  ",
+        " FFFFccccc|  |   h|r c  ",
+        "|||||||||||YY|[===||    ",
+        " FF c|^???^       v| c  ",
+        "    c|?           V| c  ",
+        "    c|? tt         | i  ",
+        "    c|             |    ",
+        "|5||||    dddd     |==2|",
+        "    Y2    d hd     2Y   ",
+        "    Y2    ^^^^     2Y   ",
+        "|2||||    ||||    ^|((2|",
+        "    r|            ^|    ",
+        "cc  r|n^^^        ^|^   ",
+        "cc hc||||||YY|[====| h  ",
+        "    c|FFFF|  | h ^B|6tt ",
+        "|||||||22||22|dd  B|||||",
+        "          |  |h  nB|FFF ",
+        "   c6  6c |  |||||||    ",
+        "   cc  cc |  |6h        ",
+        "   cc  cc 2  |c  ccccc  ",
+        "          |  |          "
+      ],
+      "palettes": [ "microlab" ],
+      "terrain": { "G": "t_card_science" },
+      "items": {
+        "l": [ { "item": "guns_milspec", "chance": 10 }, { "item": "ammo_milspec", "chance": 70 } ],
+        "t": { "item": "magazines", "chance": 90 }
+      }
+    }
+  },
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic_surface_connector" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_concrete",
+      "rows": [
+        "     |    |  |cccc|     ",
+        "     |=[==|  ||||||     ",
+        "  ((2|    |  2    2  i  ",
+        "  (  | cci|  2    2  c  ",
+        "  (@@|    |  ||||||  c  ",
+        "|||||| cci|  |rrrr|     ",
+        " F|F (    |  |    2  c  ",
+        " F|F ( cci|  ||||||  c  ",
+        " F|F 2    |  |rrrr|  i  ",
+        "  |F |rrrr|  |    2     ",
+        "|5|||||||||22|||||||||||",
+        "    2      YY      5TYY ",
+        "    2      YY      5 YY ",
+        "|2||||^???    yyyyy|(((|",
+        "    r|t       y    5 dd|",
+        "cc  r|V tt    yyyyy| hl|",
+        "cc hc|t       y    |||||",
+        "    c|^???    yyyyy|###|",
+        "|||||||||||  ^|((22|||#|",
+        " rrcc| hd^=  ^|eeeeee|#|",
+        "    c| dd =  ^|eeeeee|#|",
+        " c6 6|B   =  ^|EeeeeE|#|",
+        " cc r|B   [  ^|eeeeee|#|",
+        "     |    |22|||||||||||"
+      ],
+      "palettes": [ "microlab" ],
+      "terrain": { "e": "t_elevator", "E": "t_elevator_control" },
+      "items": {
+        "l": [ { "item": "guns_milspec", "chance": 10 }, { "item": "ammo_milspec", "chance": 70 } ],
+        "t": { "item": "magazines", "chance": 90 }
+      }
+    }
+  },
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic_surface" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_concrete",
+      "rows": [
+        " yyyyyyyyyyyyyyyyyyyyyy ",
+        " yyyyyyyyyyyyyyyyyyyyyy ",
+        " y____________________y ",
+        " y____________________y ",
+        " y____________________y ",
+        " ||||||||||22|yyyyyyyyy ",
+        " |         SS|________y ",
+        " |         SS|________y ",
+        " |         SS|________y ",
+        " |         SS|________y ",
+        " |   |((((|22||555555|y ",
+        " |   |........|yyyyyy|. ",
+        " |   |..dddd..|......|. ",
+        " |   |^.d.hd..5yyyyyy|  ",
+        " |   |||||||..5......|  ",
+        " |   (V.??....Gyyyyyy|  ",
+        " |   (t.......|......|  ",
+        " |   (^???....|yyyyyy|  ",
+        " |   ||||||..^|yyyyyy|  ",
+        " |   |.hd^=..^|eeeeee|  ",
+        " |   |.dd.=..^|eeeeee|  ",
+        " |   |B...=..^|EeeeeE|  ",
+        " |   |B...[..^|eeeeee|  ",
+        " |||||||||||||||||||||  "
+      ],
+      "palettes": [ "microlab" ],
+      "terrain": {
+        "e": "t_elevator",
+        "E": "t_elevator_control",
+        " ": "t_grass",
+        "_": "t_pavement",
+        ".": "t_thconc_floor",
+        "G": "t_card_science"
+      }
+    }
+  },
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic_surface_roof" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_concrete",
+      "rows": [
+        "                        ",
+        "                        ",
+        "                        ",
+        "                        ",
+        "                        ",
+        "                        ",
+        "                        ",
+        "                        ",
+        "                        ",
+        "                        ",
+        "     .................  ",
+        "     .................  ",
+        "     .................  ",
+        "     .................  ",
+        "     .................  ",
+        "     .................  ",
+        "     .................  ",
+        "     .................  ",
+        "     .................  ",
+        "     .................  ",
+        "     .................  ",
+        "     .................  ",
+        "     .................  ",
+        "     .................  "
+      ],
+      "terrain": { " ": "t_open_air", ".": "t_concrete" }
+    }
+  }
+]
diff --git a/data/json/mapgen/microlab/microlab_generic.json b/data/json/mapgen/microlab/microlab_generic.json
new file mode 100644
index 0000000000000..cd651cb2b5868
--- /dev/null
+++ b/data/json/mapgen/microlab/microlab_generic.json
@@ -0,0 +1,497 @@
+[
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_strconc_floor",
+      "rows": [
+        " cc  |    2  |rrrr|     ",
+        " cc  ==[==|  ||||||     ",
+        "     =    |  |i  l|r i  ",
+        "     [    |22|i  l|r c  ",
+        " FFFF=    |  |i  l|r c  ",
+        "|||||||||||  ||2||||    ",
+        " F|F |####|        | c  ",
+        " F|F ||||||        | c  ",
+        " F|F |????         | i  ",
+        "     |             |   Y",
+        "|5||||   dddddd    |2|||",
+        "    2 Y  dh^  d    |    ",
+        "    2 Y  d  ^hd    |    ",
+        "|2||||   dddddd    |(((|",
+        "    r|             2    ",
+        "cc  r|????         |^   ",
+        "cc hc||||||        | h  ",
+        "    c|FFFF|  |     |6tt ",
+        "|||||||22||  ||((22|||||",
+        "          |  |     |FF| ",
+        "   c6  6c |  |c    |  | ",
+        "   cc  cc |  |6h        ",
+        "   cc  cc |  |c  ccccc  ",
+        "          |22|          "
+      ],
+      "palettes": [ "microlab" ],
+      "items": { "l": { "item": "cleaning", "chance": 50, "repeat": [ 1, 3 ] } }
+    }
+  },
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_strconc_floor",
+      "rows": [
+        " cc  |    |  |FFFF|6    ",
+        " cc      F|  ||||||6 h  ",
+        "         F|  2    |^    ",
+        "c=   dd ||||||||r |6h   ",
+        "c=   dh |;|;| ;|r |6    ",
+        "|||22||||2|2|2||r |||||2",
+        " F|  |##|      |F =FFFF ",
+        " F|  ||||||    |F =     ",
+        " F|  |ll|i     |F 2  cc ",
+        "  2  |i |i     |F =  cc ",
+        "|||  ||2||||||2||||22|||",
+        "     2           Y      ",
+        "     2           Y      ",
+        "||2||||2||||||2|     |||",
+        "    r|i |iiiY  |     |c ",
+        "cc  r|ll|      |  =[==c ",
+        "cc hc||||      |  =  =c ",
+        "    c|@@|2|2|2||  =  [  ",
+        "||2|||  |;|;| ;|  =[==||",
+        "     =[=||||||||  | c c ",
+        "  c  Y   6|       | c c ",
+        "  iccc   6|       | i i ",
+        "  c      6|  |||2||     ",
+        "  c c|c   |22|    | c c "
+      ],
+      "palettes": [ "microlab" ]
+    }
+  },
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_strconc_floor",
+      "rows": [
+        " cc  |   c|  |c  c|   c ",
+        " cc  |   c|  ||||||   c ",
+        "     | h 6|      c|     ",
+        " dd  |==|||||||  ?|6h   ",
+        " hd  |tt|^    =  ?|6    ",
+        "|||=[|||| hth =Y ?||||||",
+        " c|  |##| hth =Y V|h  = ",
+        " c|  |##| hth =  c|dd = ",
+        " c|=[|##| hth =  a|   ] ",
+        "  |  |##|^    [   |   = ",
+        "|||  ||||||||||   |=[=||",
+        "     2                  ",
+        "     2                  ",
+        "||2||||||======[[=|  ||2",
+        "    r|##|^       ^|  |r ",
+        "cc  r|##| htth  hh|  |r ",
+        "cc h6|||| htth  tt|  |r ",
+        "    c|  2       tt|  |r ",
+        "||||||;i|foee   hh|  |||",
+        "     ||||||||||||||  |c ",
+        "  c      6|          |c ",
+        "  iccc   6|          2  ",
+        "  c      6|  |||||||||  ",
+        "  c c|c   |22|6hh6|cc   "
+      ],
+      "palettes": [ "microlab" ]
+    }
+  },
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_strconc_floor",
+      "rows": [
+        " cc c|c   |  |r  F|     ",
+        " cc       |  |r  F|   c ",
+        "        FF|  2   F|   c ",
+        " dd     |||22||||||     ",
+        " hd  rrr|    2    2     ",
+        "|||22||||    |||||||||||",
+        " c|  |l 2    2    2 d^= ",
+        " c|  ||||    |    | d = ",
+        " c|     2    | cc |   ] ",
+        "  2     2    | cc |   = ",
+        "|||||||||||22|||||||||||",
+        "   |FFccFF|   c   |     ",
+        "   |F    F|   T   |     ",
+        "||2||    ||   c   |  |||",
+        "          |   c   |  2  ",
+        "cc  cc  cc|   6   |  2  ",
+        "cc  cc  cc|       |  |  ",
+        "       h  |       |  |  ",
+        "||||||6tcc|^     ^|  |2|",
+        "     ||||||22||||||  |  ",
+        "  c      2           | c",
+        "  iccc   2           | c",
+        "  c      ||  |||||||||  ",
+        "  c c|c   |  |6hh6|cFc  "
+      ],
+      "palettes": [ "microlab" ]
+    }
+  },
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_strconc_floor",
+      "rows": [
+        " cc c|c   |  |c  F|c    ",
+        " cc       |  |c  F|c  c ",
+        "          |  |    2   c ",
+        " dd     |||22||||||     ",
+        " hd  FFF|hd      c|     ",
+        "|||5||||| d   iccc|2===|",
+        " c|              c| dh= ",
+        " c|cci  cic   iccc| d = ",
+        " c|              c|   ] ",
+        "  |cci |FFF|66cccc|   = ",
+        "2|||||||||||||||||||||||",
+        "                        ",
+        "                        ",
+        "||22((((((|||||22|||||||",
+        "          |^hd    rrr|  ",
+        "cc  cc  cc|  d      r|  ",
+        "cc  cc  cc|       rrr|  ",
+        "      YY  |W        W|  ",
+        "||   |6tcc||555||555||2|",
+        "     ||||||    |     |  ",
+        "  c  ccccc| X X|X X X| c",
+        "  i      c|XXXX|X X X| c",
+        "  c      c||||||||||||  ",
+        "    c|c   |^^|6hh6|cFc  "
+      ],
+      "palettes": [ "microlab" ],
+      "furniture": { "X": "f_crate_c" },
+      "terrain": { "W": "t_gates_mech_control_lab" },
+      "items": { "X": { "item": "tools_science", "repeat": [ 2, 6 ] } }
+    }
+  },
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_strconc_floor",
+      "rows": [
+        " cc c|r  r|  |   c|c    ",
+        " ||||||||||  | ccc|c  c ",
+        " |Y          ||||||c  c ",
+        " |           2    2     ",
+        " |  ||||||| |||||||     ",
+        "||  |l+         +l|2||||",
+        " |  ||| ||||||| ||| ccc ",
+        " 2  |;+   i|i   +;|     ",
+        " |  |||   i|i   |||     ",
+        " |  |;+   i|i   +;|FFrr ",
+        "||  ||||||||||||||||||||",
+        "                        ",
+        "                        ",
+        "||||||||||||||||||||||||",
+        " |ll|        (      c|  ",
+        " 2  dh       2  tt  c|  ",
+        " 2  d   cccc (      c|  ",
+        " |           |||||||||  ",
+        "|| cccc  ccc |rrr|F F|2|",
+        "F|   h    h  2   |F F|  ",
+        " |FFccc  ccrr|rrr|F F| c",
+        " ||||||||||||||||||2|| c",
+        " cFFc|cccc|^^|cccc|     ",
+        "     2    |  2    |     "
+      ],
+      "palettes": [ "microlab" ]
+    }
+  },
+  {
+    "type": "mapgen",
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+    "om_terrain": [ [ "microlab_generic" ] ],
+    "method": "json",
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+    "method": "json",
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+    }
+  },
+  {
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+    "om_terrain": [ [ "microlab_generic" ] ],
+    "method": "json",
+    "object": {
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+    }
+  },
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+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_strconc_floor",
+      "rows": [
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+        " c|l |R    ttttt R|  |c ",
+        " c|l |R          R|  |  ",
+        " c|l      RRR66RRR|  |  ",
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+]
diff --git a/data/json/mapgen/microlab/microlab_generic_edge.json b/data/json/mapgen/microlab/microlab_generic_edge.json
new file mode 100644
index 0000000000000..13cdfd99ece20
--- /dev/null
+++ b/data/json/mapgen/microlab/microlab_generic_edge.json
@@ -0,0 +1,512 @@
+[
+  {
+    "type": "mapgen",
+    "method": "json",
+    "nested_mapgen_id": "concrete_wall_ew",
+    "object": {
+      "mapgensize": [ 24, 24 ],
+      "set": [ { "line": "terrain", "id": "t_concrete_wall", "x": 0, "y": 0, "x2": 23, "y2": 0 } ]
+    }
+  },
+  {
+    "type": "mapgen",
+    "method": "json",
+    "nested_mapgen_id": "concrete_wall_ns",
+    "object": {
+      "mapgensize": [ 24, 24 ],
+      "set": [ { "line": "terrain", "id": "t_concrete_wall", "x": 0, "y": 0, "x2": 0, "y2": 23 } ]
+    }
+  },
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic_edge" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_strconc_floor",
+      "rows": [
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+        "|||||||22||22||((22|||||",
+        "          |  |     |FFF ",
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+        "   cc  cc |  |6h        ",
+        "   cc  cc 2  |c  ccccc  ",
+        "          |  |          "
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+      "place_nested": [
+        { "chunks": [ "concrete_wall_ew" ], "x": 0, "y": 0, "neighbors": { "north": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ns" ], "x": 23, "y": 0, "neighbors": { "east": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ew" ], "x": 0, "y": 23, "neighbors": { "south": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ns" ], "x": 0, "y": 0, "neighbors": { "west": "microlab_rock_border" } }
+      ],
+      "palettes": [ "microlab" ]
+    }
+  },
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic_edge" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_strconc_floor",
+      "rows": [
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+        "     2     YY      2    ",
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+        "    r|         6   |    ",
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+        "cc hc||||||  ||((22| h  ",
+        "    c2    2  |     |6tt ",
+        "||||||    |  ||((22|||||",
+        "          |  |     |FFF ",
+        "   c6  6c |22|c    |    ",
+        "   cc  cc |  |6h        ",
+        "   cc  cc |  |c  ccccc  ",
+        "          |  5          "
+      ],
+      "place_nested": [
+        { "chunks": [ "concrete_wall_ew" ], "x": 0, "y": 0, "neighbors": { "north": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ns" ], "x": 23, "y": 0, "neighbors": { "east": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ew" ], "x": 0, "y": 23, "neighbors": { "south": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ns" ], "x": 0, "y": 0, "neighbors": { "west": "microlab_rock_border" } }
+      ],
+      "palettes": [ "microlab" ]
+    }
+  },
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic_edge_edge" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_strconc_floor",
+      "rows": [
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+        "|#########|  2    2     ",
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+        "||2|||D   |22|    D|((2|",
+        "    6|@@  |  |   @@|    ",
+        "    6|D   2  |    D|c   ",
+        "    c|@@  2  |   @@|c   ",
+        "    c|  ll|  |ll   |c   ",
+        "     ||||||  |||||||    "
+      ],
+      "place_nested": [
+        { "chunks": [ "concrete_wall_ew" ], "x": 0, "y": 0, "neighbors": { "north": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ns" ], "x": 23, "y": 0, "neighbors": { "east": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ew" ], "x": 0, "y": 23, "neighbors": { "south": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ns" ], "x": 0, "y": 0, "neighbors": { "west": "microlab_rock_border" } }
+      ],
+      "palettes": [ "microlab" ]
+    }
+  },
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic_edge" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_strconc_floor",
+      "rows": [
+        "|||||||||||  |    |     ",
+        "|tRt  yyyy|  2    2     ",
+        "|     y  y|  ||||||||   ",
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+        "|RRR      |  2     |d   ",
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+        "|OOOO     |  |||||||6   ",
+        "||||||||22|     ^^^|||2|",
+        "                        ",
+        "                        ",
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+        "    t||||||  |||||||c   ",
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+        "    6|^hd =  =  d B|c   ",
+        " c  6|^ dh=  = hdhB|c   ",
+        " c  c||||||  |||||||c   ",
+        " c  c|    2  2  FF|UU   ",
+        "     |    |  |    |     "
+      ],
+      "place_nested": [
+        { "chunks": [ "concrete_wall_ew" ], "x": 0, "y": 0, "neighbors": { "north": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ns" ], "x": 23, "y": 0, "neighbors": { "east": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ew" ], "x": 0, "y": 23, "neighbors": { "south": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ns" ], "x": 0, "y": 0, "neighbors": { "west": "microlab_rock_border" } }
+      ],
+      "palettes": [ "microlab" ]
+    }
+  },
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic_edge" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_strconc_floor",
+      "rows": [
+        "|||||||||||  |    |     ",
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+        "|||||||||||  |(((((||| |",
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+        "   h      |       ^|6   ",
+        "  tRRt    |       V|6   ",
+        "||||||||22|       ^|||2|",
+        "                        ",
+        "                        ",
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+        "    t||||||  |||||||c   ",
+        "||2|||^   2  2    ^|((2|",
+        "    6|^hd =  =  d B|c   ",
+        " c  6|^ dh=  = hdhB|c   ",
+        " c  c||||||  |||||||c   ",
+        " c  c|    2  2    F|c   ",
+        "     |    |  |     |    "
+      ],
+      "place_nested": [
+        { "chunks": [ "concrete_wall_ew" ], "x": 0, "y": 0, "neighbors": { "north": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ns" ], "x": 23, "y": 0, "neighbors": { "east": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ew" ], "x": 0, "y": 23, "neighbors": { "south": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ns" ], "x": 0, "y": 0, "neighbors": { "west": "microlab_rock_border" } }
+      ],
+      "palettes": [ "microlab" ]
+    }
+  },
+  {
+    "type": "mapgen",
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+      ],
+      "palettes": [ "microlab" ]
+    }
+  },
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic_edge" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_strconc_floor",
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+        " U |      |  |   hh|cc  ",
+        " U |      |  |   tt|cc  ",
+        "   |      |  |   hh|    ",
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+        { "chunks": [ "concrete_wall_ew" ], "x": 0, "y": 23, "neighbors": { "south": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ns" ], "x": 0, "y": 0, "neighbors": { "west": "microlab_rock_border" } }
+      ],
+      "palettes": [ "microlab" ]
+    }
+  },
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic_edge" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_strconc_floor",
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+        "||2|||22|||  |   hR|((2|",
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+        " c        (  |     |U   ",
+        " c |c cc c|  |     |U   ",
+        "   |      |  |||||||    "
+      ],
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+        { "chunks": [ "concrete_wall_ew" ], "x": 0, "y": 23, "neighbors": { "south": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ns" ], "x": 0, "y": 0, "neighbors": { "west": "microlab_rock_border" } }
+      ],
+      "palettes": [ "microlab" ]
+    }
+  },
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic_edge" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_strconc_floor",
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+        " c |||||2||  |   h |U   ",
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+      ],
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+        { "chunks": [ "concrete_wall_ns" ], "x": 23, "y": 0, "neighbors": { "east": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ew" ], "x": 0, "y": 23, "neighbors": { "south": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ns" ], "x": 0, "y": 0, "neighbors": { "west": "microlab_rock_border" } }
+      ],
+      "palettes": [ "microlab" ]
+    }
+  },
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic_edge" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_strconc_floor",
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+        { "chunks": [ "concrete_wall_ew" ], "x": 0, "y": 23, "neighbors": { "south": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ns" ], "x": 0, "y": 0, "neighbors": { "west": "microlab_rock_border" } }
+      ],
+      "palettes": [ "microlab" ]
+    }
+  },
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic_edge" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_strconc_floor",
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+      ],
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+        { "chunks": [ "concrete_wall_ns" ], "x": 23, "y": 0, "neighbors": { "east": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ew" ], "x": 0, "y": 23, "neighbors": { "south": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ns" ], "x": 0, "y": 0, "neighbors": { "west": "microlab_rock_border" } }
+      ],
+      "palettes": [ "microlab" ]
+    }
+  },
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic_edge" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_strconc_floor",
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+        "|2||=======[=|22(((|((2|",
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+        "|2||v       ^|     |((2|",
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+        "  U|2|||2||2||   h |c   ",
+        "   U |UU U|  |^BBB^|U   ",
+        "     |    |  |||||||    "
+      ],
+      "place_nested": [
+        { "chunks": [ "concrete_wall_ew" ], "x": 0, "y": 0, "neighbors": { "north": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ns" ], "x": 23, "y": 0, "neighbors": { "east": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ew" ], "x": 0, "y": 23, "neighbors": { "south": "microlab_rock_border" } },
+        { "chunks": [ "concrete_wall_ns" ], "x": 0, "y": 0, "neighbors": { "west": "microlab_rock_border" } }
+      ],
+      "palettes": [ "microlab" ]
+    }
+  }
+]
diff --git a/data/json/mapgen/microlab/microlab_special_tiles.json b/data/json/mapgen/microlab/microlab_special_tiles.json
new file mode 100644
index 0000000000000..3cb252a95d5eb
--- /dev/null
+++ b/data/json/mapgen/microlab/microlab_special_tiles.json
@@ -0,0 +1,176 @@
+[
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_strconc_floor",
+      "rows": [
+        " cc  |   c|  |c  c|r    ",
+        " cc  |   c|  |c  c|r  c ",
+        "     | h 6|  2    2   c ",
+        " dd  |==|||22||||||6h   ",
+        " hd  |tt|--  -----|6    ",
+        "|||22||||-   -fYf-||||||",
+        " c|  |##|-dd -f f-|hd^= ",
+        " c|  ||||-h  -f f-| d = ",
+        " c|    c|-G55-f f-|   ] ",
+        "  2    c|-   --2--|   = ",
+        "|||    c|-       -||||||",
+        "       ?|-Y  cc c-|     ",
+        "       ?|-   cc c-|     ",
+        "||2||||||-h     c-|  |||",
+        "       r|-tt-   c-|  |r ",
+        "cc  c  r||((-   Y-|  |r ",
+        "cc  c rr|-@;-5- h-|  |r ",
+        "       r|-@M5 -dd-|  |r ",
+        "||||||rr|---------|  |||",
+        "     ||||||||||||||  |c ",
+        "  c      6|          |c ",
+        "  iccc   6|          2  ",
+        "  c      6|  ||22|||||  ",
+        "  c c|c   |22|    |cc   "
+      ],
+      "palettes": [ "microlab" ],
+      "terrain": { "G": "t_card_science" },
+      "items": { "f": { "item": "mutagens", "chance": 60, "repeat": [ 1, 4 ] } },
+      "monster": { "M": { "monster": "mon_mutant_experimental" } },
+      "place_monsters": [ { "monster": "GROUP_LAB", "chance": 2, "x": [ 2, 21 ], "y": [ 2, 21 ], "repeat": [ 1, 5 ] } ]
+    }
+  },
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_strconc_floor",
+      "rows": [
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+        "     2    2  2    | c c ",
+        "   F|||||||  |||||||c c ",
+        "   F|m 5  |22|0c7c0|c c ",
+        "   F|(((  (  |     |    ",
+        "|||||m 5  (  |((2((|  ||",
+        "  66|(((  (       c|    ",
+        "    |m 5  (       6|  c ",
+        "  cc||||  |((((   c|  c ",
+        "    |  2  5   (    |    ",
+        "2((||2||((|  m(    ||2||",
+        "   2      (((((    2    ",
+        "   2               2    ",
+        "2((||              ||2||",
+        "   c|      d6d     |c   ",
+        " c c| d6d   h   d6d|c c ",
+        " c c|  h         h |c c ",
+        "   c|              |F   ",
+        "|||||              |||2|",
+        "c66c|FFFFFF  |ccccc|cc  ",
+        " c c|||||||22|||||||    ",
+        " c cc(ccc |  |FFFF|  cc ",
+        " c        2  ||22||  cc ",
+        "     (    |  |    |     "
+      ],
+      "palettes": [ "microlab" ],
+      "terrain": { "0": "t_vat" },
+      "monster": { "T": { "monster": "mon_mutant_experimental" } },
+      "place_items": [  ],
+      "place_monsters": [ { "monster": "GROUP_LAB", "chance": 2, "x": [ 2, 21 ], "y": [ 2, 21 ], "repeat": [ 1, 5 ] } ]
+    }
+  },
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_strconc_floor",
+      "rows": [
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+        "     |    |^^|    |cccc ",
+        "  ||||||||||||||||||||c ",
+        "  |------------------|6 ",
+        "  |-F   cccccc -lll -|r ",
+        "|||-F          2   c-||2",
+        "  |---  cc cc  -  h6-|  ",
+        "  |-F   cc cc  - h c-|c ",
+        "  |-F   cc cc  -cccc-|c ",
+        "  |---         -((((-|  ",
+        "2|G            2   7-|||",
+        "  5  T----22----  @@-|  ",
+        "  5  T-h       5   7-|  ",
+        "||-lll-66      5    -|||",
+        " |-----(((222---------|c",
+        " |-0 0 0 0   0 0 0 0 -| ",
+        " |-0 0 0 0   0 0 0 0 -| ",
+        "c|-                  -|c",
+        "||-0 0 0 0 0 0 0 0 0 -||",
+        "c|-0 0 0 0 0 0 0 0 0 -|F",
+        " |--------------------|F",
+        " |||||||||||||||||||||||",
+        " cccc|c   |^^|    |  cc ",
+        "    c|c   2  2    |     "
+      ],
+      "palettes": [ "microlab" ],
+      "terrain": { "0": "t_vat", "G": "t_card_science" },
+      "monster": { "T": { "monster": "mon_turret_rifle" } },
+      "place_monsters": [ { "monster": "GROUP_LAB", "chance": 2, "x": [ 2, 21 ], "y": [ 2, 21 ], "repeat": [ 1, 5 ] } ]
+    }
+  },
+  {
+    "type": "mapgen",
+    "om_terrain": [ [ "microlab_generic" ] ],
+    "method": "json",
+    "object": {
+      "fill_ter": "t_strconc_floor",
+      "rows": [
+        "^|FFF|c  c|  |c  c|     ",
+        " ||||||||||  |||||||||| ",
+        " |D      D|  |^^^^|ccc| ",
+        " |@@    @@|       2   2 ",
+        "^|D   T  D|       |   | ",
+        "||@@    @@|  |2(((||||||",
+        "r|        2  |       O| ",
+        "r|||||2||||  |  RR   O| ",
+        "r|l  | | l|  |  RR   O| ",
+        " |l  | 2 l|  |       O| ",
+        "2||||||||||22|  |-tt-|||",
+        "           YY|  |-((--|^",
+        "           YY|  |-@Ti-|^",
+        "|||||2||||||||5G|-@ ;-||",
+        " |        |---5----2--| ",
+        " | cc  cc |-p   Y   p-| ",
+        " | cc  cc |-p   7   p-|t",
+        " |     cc |-p   / T p-|t",
+        "||     cc |-         -||",
+        " |2|||    |-(- -(-   -| ",
+        " |   |dh d|-T-6-T-ppp-| ",
+        " 2   |dddd|-----------| ",
+        " |||||||||||||||||||||| ",
+        "     |ttt |^^| cc |     "
+      ],
+      "palettes": [ "microlab" ],
+      "terrain": { "G": "t_card_science" },
+      "furniture": { "7": "f_autodoc", "/": "f_autodoc_couch", "T": "f_counter", "p": "f_counter" },
+      "items": {
+        "p": { "item": "bionics", "chance": 20 },
+        "T": [
+          { "item": "bionics_sci", "chance": 100, "repeat": [ 1, 2 ] },
+          { "item": "bionics", "chance": 100, "repeat": [ 1, 3 ] }
+        ]
+      },
+      "place_loot": [ { "item": "anesthetic_kit", "x": 20, "y": 15 } ],
+      "place_monsters": [ { "monster": "GROUP_LAB", "x": [ 2, 21 ], "y": [ 2, 21 ], "repeat": [ 1, 5 ] } ],
+      "monster": { "T": { "monster": "mon_prototype_cyborg" } },
+      "computers": {
+        "6": {
+          "name": "Surgery room computer",
+          "security": 3,
+          "options": [
+            { "name": "Open Storage Chambers", "security": 5, "action": "release_bionics" },
+            { "name": "Manifest", "action": "list_bionics" }
+          ],
+          "failures": [ { "action": "manhacks" }, { "action": "secubots" } ]
+        }
+      }
+    }
+  }
+]
diff --git a/data/json/mapgen_palettes/microlab.json b/data/json/mapgen_palettes/microlab.json
new file mode 100644
index 0000000000000..e60bcc3cc3e90
--- /dev/null
+++ b/data/json/mapgen_palettes/microlab.json
@@ -0,0 +1,81 @@
+[
+  {
+    "type": "palette",
+    "id": "microlab",
+    "terrain": {
+      "+": "t_door_c",
+      ".": "t_metal_floor",
+      "3": "t_door_locked",
+      "2": "t_door_glass_frosted_lab_c",
+      "4": "t_door_metal_pickable",
+      "5": "t_door_metal_locked",
+      "6": "t_console_broken",
+      "[": "t_door_glass_c",
+      "-": "t_wall_metal",
+      "y": "t_pavement_y",
+      "|": "t_concrete_wall",
+      "=": "t_wall_glass",
+      "(": "t_reinforced_glass",
+      "e": "t_elevator",
+      "E": "t_elevator_control",
+      "<": "t_stairs_up",
+      ">": "t_stairs_down",
+      "Y": "t_utility_light",
+      "#": "t_rock"
+    },
+    "furniture": {
+      "&": "f_toilet",
+      "~": "f_shower",
+      "@": "f_bed",
+      "a": "f_armchair",
+      "k": "f_cupboard",
+      "D": "f_dresser",
+      "h": "f_chair",
+      "b": "f_bench",
+      "B": "f_bookcase",
+      "c": "f_counter",
+      "l": "f_locker",
+      "n": "f_trashcan",
+      "d": "f_desk",
+      "f": "f_fridge",
+      "F": "f_glass_fridge",
+      "o": "f_oven",
+      "O": "f_utility_shelf",
+      "U": "f_utility_shelf",
+      "i": "f_sink",
+      "r": "f_rack",
+      "?": "f_sofa",
+      "t": "f_table",
+      "R": "f_table",
+      "^": "f_indoor_plant",
+      "x": "f_safe_l"
+    },
+    "toilets": { ";": {  } },
+    "items": {
+      "d": { "item": "office", "chance": 70, "repeat": [ 1, 3 ] },
+      "B": [ { "item": "textbooks", "chance": 50 }, { "item": "manuals", "chance": 50 } ],
+      "F": [
+        { "item": "supplies_reagents_lab", "chance": 70, "repeat": [ 2, 5 ] },
+        { "item": "supplies_samples_lab", "chance": 40, "repeat": [ 1, 3 ] }
+      ],
+      "U": [
+        { "item": "tools_science", "chance": 30, "repeat": [ 1, 3 ] },
+        { "item": "supplies_reagents_lab", "chance": 70, "repeat": [ 1, 3 ] },
+        { "item": "supplies_samples_lab", "chance": 10, "repeat": [ 1, 2 ] }
+      ],
+      "c": [
+        { "item": "tools_science", "chance": 30, "repeat": [ 1, 3 ] },
+        { "item": "supplies_reagents_lab", "chance": 70, "repeat": [ 1, 3 ] },
+        { "item": "supplies_samples_lab", "chance": 10, "repeat": [ 1, 2 ] }
+      ],
+      "R": [
+        { "item": "tools_robotics", "chance": 20, "repeat": [ 1, 3 ] },
+        { "item": "robots", "chance": 40, "repeat": [ 1, 3 ] },
+        { "item": "supplies_electronics", "chance": 40, "repeat": [ 1, 3 ] }
+      ],
+      "O": [ { "item": "tools_robotics", "chance": 40, "repeat": [ 1, 3 ] }, { "item": "schematics", "chance": 2 } ],
+      "i": { "item": "cleaning", "chance": 20 }
+    },
+    "vendingmachines": { "V": {  } }
+  }
+]
diff --git a/data/json/monstergroups/lab.json b/data/json/monstergroups/lab.json
index 7f50e81061b6b..6d185f3415842 100644
--- a/data/json/monstergroups/lab.json
+++ b/data/json/monstergroups/lab.json
@@ -107,5 +107,31 @@
     "name": "GROUP_LAB_CYBORG",
     "default": "mon_broken_cyborg",
     "monsters": [ { "monster": "mon_prototype_cyborg", "freq": 400, "cost_multiplier": 0 } ]
+  },
+  {
+    "type": "monstergroup",
+    "name": "GROUP_MICROLAB",
+    "default": "mon_zombie_scientist",
+    "monsters": [
+      { "monster": "mon_blob_small", "freq": 40, "cost_multiplier": 0, "pack_size": [ 3, 6 ] },
+      { "monster": "mon_zombie_scientist", "freq": 40, "cost_multiplier": 0, "pack_size": [ 1, 5 ] },
+      { "monster": "mon_science_bot", "freq": 40, "cost_multiplier": 2 },
+      { "monster": "mon_zombie_labsecurity", "freq": 40, "cost_multiplier": 0, "pack_size": [ 2, 3 ] },
+      { "monster": "mon_zombie_hazmat", "freq": 40, "cost_multiplier": 1, "pack_size": [ 1, 3 ] },
+      { "monster": "mon_manhack", "freq": 20, "cost_multiplier": 1, "pack_size": [ 3, 12 ] },
+      { "monster": "mon_mutant_experimental", "freq": 10, "cost_multiplier": 0, "pack_size": [ 1, 3 ] },
+      { "monster": "mon_skitterbot", "freq": 10, "cost_multiplier": 0, "pack_size": [ 2, 3 ] },
+      { "monster": "mon_secubot", "freq": 2, "cost_multiplier": 5 },
+      { "monster": "mon_zombie_bio_op", "freq": 10, "cost_multiplier": 3 },
+      { "monster": "mon_zombie", "freq": 40, "cost_multiplier": 1, "pack_size": [ 2, 7 ] },
+      { "monster": "mon_zombie_fat", "freq": 40, "cost_multiplier": 1, "pack_size": [ 2, 4 ] },
+      { "monster": "mon_zombie_tough", "freq": 20, "cost_multiplier": 2, "pack_size": [ 2, 4 ] },
+      { "monster": "mon_zombie_crawler", "freq": 10, "cost_multiplier": 1 },
+      { "monster": "mon_zombie_technician", "freq": 10, "cost_multiplier": 2 },
+      { "monster": "mon_zombie_armored", "freq": 1, "cost_multiplier": 5 },
+      { "monster": "mon_zombie_electric", "freq": 10, "cost_multiplier": 3 },
+      { "monster": "mon_zombie_necro", "freq": 1, "cost_multiplier": 15 },
+      { "monster": "mon_zombie_brute_shocker", "freq": 1, "cost_multiplier": 5 }
+    ]
   }
 ]
diff --git a/data/json/overmap/overmap_special/specials.json b/data/json/overmap/overmap_special/specials.json
index 7be59921c8a90..844df613f9a87 100644
--- a/data/json/overmap/overmap_special/specials.json
+++ b/data/json/overmap/overmap_special/specials.json
@@ -3995,6 +3995,101 @@
     "occurrences": [ 1, 1 ],
     "flags": [ "UNIQUE" ]
   },
+  {
+    "type": "overmap_special",
+    "id": "4x4_microlab",
+    "overmaps": [
+      { "point": [ 2, -2, -2 ], "overmap": "microlab_sub_connector_north" },
+      { "point": [ 2, -1, -2 ], "overmap": "microlab_sub_station_north" },
+      { "point": [ 0, -1, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 1, -1, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 3, -1, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 4, -1, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ -1, 0, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 0, 0, -2 ], "overmap": "microlab_generic_edge" },
+      { "point": [ 1, 0, -2 ], "overmap": "microlab_generic_edge" },
+      { "point": [ 2, 0, -2 ], "overmap": "microlab_generic_sub_entry_north" },
+      { "point": [ 3, 0, -2 ], "overmap": "microlab_generic_edge" },
+      { "point": [ 4, 0, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ -1, 1, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 0, 1, -2 ], "overmap": "microlab_generic_edge" },
+      { "point": [ 1, 1, -2 ], "overmap": "microlab_generic" },
+      { "point": [ 2, 1, -2 ], "overmap": "microlab_generic" },
+      { "point": [ 3, 1, -2 ], "overmap": "microlab_generic_edge" },
+      { "point": [ 4, 1, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ -1, 2, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 0, 2, -2 ], "overmap": "microlab_generic_edge" },
+      { "point": [ 1, 2, -2 ], "overmap": "microlab_generic" },
+      { "point": [ 2, 2, -2 ], "overmap": "microlab_generic" },
+      { "point": [ 3, 2, -2 ], "overmap": "microlab_generic_edge" },
+      { "point": [ 4, 2, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ -1, 3, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 0, 3, -2 ], "overmap": "microlab_generic_edge" },
+      { "point": [ 1, 3, -2 ], "overmap": "microlab_generic_edge" },
+      { "point": [ 2, 3, -2 ], "overmap": "microlab_generic_edge" },
+      { "point": [ 3, 3, -2 ], "overmap": "microlab_generic_edge" },
+      { "point": [ 4, 3, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ -1, 4, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 0, 4, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 1, 4, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 2, 4, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 3, 4, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 4, 4, -2 ], "overmap": "microlab_rock_border" }
+    ],
+    "locations": [ "wilderness" ],
+    "city_distance": [ 3, -1 ],
+    "city_sizes": [ 1, 16 ],
+    "occurrences": [ 4, 8 ]
+  },
+  {
+    "type": "overmap_special",
+    "id": "4x4_microlab_surface",
+    "overmaps": [
+      { "point": [ 2, 1, 1 ], "overmap": "microlab_generic_surface_roof_north" },
+      { "point": [ 2, 1, 0 ], "overmap": "microlab_generic_surface_north" },
+      { "point": [ 2, -2, -2 ], "overmap": "microlab_sub_connector_north" },
+      { "point": [ 2, -1, -2 ], "overmap": "microlab_sub_station_north" },
+      { "point": [ 0, -1, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 1, -1, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 3, -1, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 4, -1, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ -1, 0, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 0, 0, -2 ], "overmap": "microlab_generic_edge" },
+      { "point": [ 1, 0, -2 ], "overmap": "microlab_generic_edge" },
+      { "point": [ 2, 0, -2 ], "overmap": "microlab_generic_sub_entry_north" },
+      { "point": [ 3, 0, -2 ], "overmap": "microlab_generic_edge" },
+      { "point": [ 4, 0, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ -1, 1, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 0, 1, -2 ], "overmap": "microlab_generic_edge" },
+      { "point": [ 1, 1, -2 ], "overmap": "microlab_generic" },
+      { "point": [ 2, 1, -2 ], "overmap": "microlab_generic_surface_connector" },
+      { "point": [ 3, 1, -2 ], "overmap": "microlab_generic_edge" },
+      { "point": [ 4, 1, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ -1, 2, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 0, 2, -2 ], "overmap": "microlab_generic_edge" },
+      { "point": [ 1, 2, -2 ], "overmap": "microlab_generic" },
+      { "point": [ 2, 2, -2 ], "overmap": "microlab_generic" },
+      { "point": [ 3, 2, -2 ], "overmap": "microlab_generic_edge" },
+      { "point": [ 4, 2, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ -1, 3, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 0, 3, -2 ], "overmap": "microlab_generic_edge" },
+      { "point": [ 1, 3, -2 ], "overmap": "microlab_generic_edge" },
+      { "point": [ 2, 3, -2 ], "overmap": "microlab_generic_edge" },
+      { "point": [ 3, 3, -2 ], "overmap": "microlab_generic_edge" },
+      { "point": [ 4, 3, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ -1, 4, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 0, 4, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 1, 4, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 2, 4, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 3, 4, -2 ], "overmap": "microlab_rock_border" },
+      { "point": [ 4, 4, -2 ], "overmap": "microlab_rock_border" }
+    ],
+    "connections": [ { "point": [ 2, 0, 0 ], "terrain": "road", "connection": "local_road", "from": [ 2, 1, 0 ] } ],
+    "locations": [ "wilderness" ],
+    "city_distance": [ 3, -1 ],
+    "city_sizes": [ 1, 16 ],
+    "occurrences": [ 0, 2 ]
+  },
   {
     "type": "overmap_special",
     "id": "ws_survivor_bunker_place",
diff --git a/data/json/overmap/overmap_terrain/overmap_terrain_microlab.json b/data/json/overmap/overmap_terrain/overmap_terrain_microlab.json
new file mode 100644
index 0000000000000..c97adcce3a1eb
--- /dev/null
+++ b/data/json/overmap/overmap_terrain/overmap_terrain_microlab.json
@@ -0,0 +1,65 @@
+[
+  {
+    "type": "overmap_terrain",
+    "id": "microlab_generic",
+    "name": "science lab",
+    "sym": "L",
+    "color": "light_blue",
+    "spawns": { "group": "GROUP_MICROLAB", "population": [ 40, 45 ], "chance": 80 },
+    "see_cost": 5,
+    "flags": [ "NO_ROTATE" ]
+  },
+  {
+    "type": "overmap_terrain",
+    "id": "microlab_rock_border",
+    "name": "solid rock",
+    "sym": "%",
+    "color": "dark_gray",
+    "see_cost": 5,
+    "flags": [ "NO_ROTATE" ]
+  },
+  {
+    "type": "overmap_terrain",
+    "id": "microlab_generic_edge",
+    "copy-from": "microlab_generic"
+  },
+  {
+    "type": "overmap_terrain",
+    "id": "microlab_generic_surface_connector",
+    "copy-from": "microlab_generic"
+  },
+  {
+    "type": "overmap_terrain",
+    "id": "microlab_sub_station",
+    "name": "subway station?",
+    "sym": "S",
+    "color": "light_blue",
+    "spawns": { "group": "GROUP_LAB", "population": [ 12, 25 ], "chance": 80 },
+    "see_cost": 5
+  },
+  {
+    "type": "overmap_terrain",
+    "id": "microlab_sub_connector",
+    "copy-from": "microlab_sub_station"
+  },
+  {
+    "type": "overmap_terrain",
+    "id": "microlab_generic_sub_entry",
+    "name": "science lab",
+    "sym": "L",
+    "copy-from": "microlab_sub_connector"
+  },
+  {
+    "type": "overmap_terrain",
+    "id": "microlab_generic_surface",
+    "name": "lab",
+    "sym": "L",
+    "color": "blue",
+    "see_cost": 5
+  },
+  {
+    "type": "overmap_terrain",
+    "id": "microlab_generic_surface_roof",
+    "copy-from": "microlab_generic_surface"
+  }
+]
diff --git a/src/overmap.cpp b/src/overmap.cpp
index 6fdf1bc8888d5..2a6f4dd45a57f 100644
--- a/src/overmap.cpp
+++ b/src/overmap.cpp
@@ -1493,6 +1493,12 @@ bool overmap::generate_sub( const int z )
             //oter_id oter_sewer = ter(i, j, -1);
             //oter_id oter_underground = ter(i, j, -2);
 
+            if( is_ot_match( "microlab_sub_connector", ter( p ), ot_match_type::type ) ) {
+                om_direction::type rotation = ter( p )->get_dir();
+                ter( p ) = oter_id( "subway_end_north" )->get_rotated( rotation );;
+                subway_points.emplace_back( p.xy() );
+            }
+
             // implicitly skip skip_above oter_ids
             bool skipme = false;
             for( auto &elem : skip_above ) {