Frequently Asked Questions

What exactly does this mod provide?

This mod uses the client-server model.
You can build a single city in Coop together with your friends.

How to download this mod?

You can directly install it from the Steam Workshop: https://steamcommunity.com/sharedfiles/filedetails/?id=1558438291.
For other platforms, see the next question:

How to install without using the Steam Workshop (e.g. Origin or Epic)?

Please follow the instructions on the homepage: https://citiesskylinesmultiplayer.com

How to use this mod?

Install and enable the mod and then:

Server

1. Create a new game or open an existing game (if using an existing game, make a backup!)
2. Open the "Pause Menu" (ESC)
3. Click the Multiplayer button on the top of the menu.
4. Update any of the fields to your liking, click Create Server.

Client

1. Click Join Game on the main menu.
2. Enter the server ip address and your information.
3. Click Connect to Server and wait up to 60 seconds.

How do I access the chat (type commands or talk to players)?

Press the T key on your keyboard and start typing. For a list of commands, type /help.

How to show the chat again after hiding it?

To toggle the chat, press the T key on your keyboard.

Do I have to forward/open a port?

The game tries to open the required port automatically through UPnP. If this fails, the host will have to manually port-forward the UDP port that was set in the Host game menu (defaults to 4230) on their router.

Do others than the host also have to forward/open a port?

No, only the host needs to open a port.

What's the IP address I need to connect to?

The host can look up the local (when you're playing over LAN) or external (when playing over the internet) IP address in the Host Game menu. The clients need to enter this address to connect. If you're playing over a tunneling service like for example Hamachi you need to use the IP address that is provided there.

How many players are supported?

There's currently no limit. But there could be more bugs when more than 2 players play together.

Which game features are currently synced?

The mod is currently under heavy development, so we just support some basic features like money, buildings, roads, zones, areas, water and electricity networks. List:

Synced Items

• Roads (including settings).
• Buildings (including settings).
• Transport lines (including settings).
• Play/pause state.
• Game speed.
• Money (still buggy).
• Demand.
• Tax (Sync but be aware that it does not show on the UI).
• Budget (Sync but be aware that it does not show on the UI).
• Powerlines.
• Water pipes.
• Zones.
• Weather

Are mods supported?

We can't guarantee support for any mods, but mods that only modify buildings or similar things should be supported as long as all players have the exact same mods installed and activated. A list of known supported (or partially supported) mods can be found here.

Are DLCs supported?

DLCs could work if all players have the exact same DLCs installed and activated, but we don't support them explicitly at the moment.

It says "DLCs don't match"

That means that your DLCs don't match ;)
You both need to have the exact same DLCs enabled, check in Steam to make sure that this is the case (Deluxe Edition also counts as a DLC!)

Where can I find the game log?

The CSM mod writes it's log data to <Cities Install Dir>/multiplayer-logs/log-current.txt

Where can I get more help?

You can join our Discord Server: https://discord.gg/RjACPhd

Is it possible to donate to the project?

Yes it is, you can donate at: https://www.patreon.com/CSM_MultiplayerMod

It doesn't work/Failed to connect

1. Have you forwarded the port in your router (port 4230) and added an exception in your firewall?
2. Do you have the most recent CSM version (check with /version in the chat. Most recent is 2012.84)?
3. Did you enable the mod in the content manager?
4. Do you both have the same mods/assets/DLCs?
5. Are you using hamachi or radmin vpn? If yes, use the ip from those programs not the external given in the game.

I can't see X/The games are not synchronized

1. Try to disable all other mods and DLCs
2. Try restarting the games
3. If it happens only sometimes, the client can type /sync into the chat to resync the game