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. If you want to download a newer build than what's uploaded on Steam, please read the instructions in the README file.

How to use this mod?

1. Install and enable the mod
2. All players need the exact same savegame before starting
   1. When starting a new game, all players can create a New Game through the main menu (selecting the same map!)
   2. When loading a game, the player with the savegame has to share the savegame file with the other players
3. Click the Show Multiplayer Menu button in the top-left of your screen
4. To host a game click on Host Game
5. To join a game click on Join Game and enter the required information

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.

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. We will provide a more up-to-date list soon.

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.

Are DLCs supported?

DLCs should work if all players have the exact same DLCs installed and activated.

Why do I have to send the savegame manually?

We decided that syncing everything on join would be too difficult to implement, so we always want to start the synchronization at the same point for all players. Our plan is to automate the sending of the savegame to make it easier to use.

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