PhiClient Mod – RimWorld Multiplayer

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Authors of the PhiClient Mod – RimWorld Multiplayer: [CPC] Longwelwind, Mlie

The Phi Mod allows multiplayer interactions between players’ colonies such as chatting and sending resources from one player to another. Finally RimWorld Multiplayer is a reality!

The Phi Mod doesn’t (and will never) allow two players to play on the same colony simultaneously. It only provides interactions between colonies played by different players

Phi Mod – RimWorld Multiplayer features

With the Phi Mod you can connect to the global default server or host your own server to play with your friends. It doesn’t matter whether you are playing via Steam or not.

New features are added with every update, but currently the Phi Mod will allow you to perform the following multiplayer actions:

  • Chat with the connected players in real time.
  • Send pods containing items from your colony to other players. They will receive the items on their own colonies.
  • [Experimental] Send your own colonists to another player’s colony.

How to play RimWorld multiplayer with the Phi Mod

After enabling the Phi Mod, load a game and a new button named “Server” will be available at the bottom-right of the screen to open up a chat. This chat will list all the players that are available on the server.

Click on the nickname of another player to send items to him.

You can change the color of your nickname for better appearance on the chat using a tag like such: <color=#53ADE1>Nickname</color>

How to set up your own RimWorld Multiplayer server

Download the server setup file and place it anywhere on  your computer. Launch PhiServer.exe using a shell (so you get the server logs in case of an error). The server can also be hosted on a Linux server ( is hosted on a Ubuntu Server machine) using mono.

If you need further instructions on how to set up your own RimWorld Multiplayer server, head to the original Ludeon Forums post.

Compatibility notes

You can enable multiplayer on previously saved games, but it is recommended to back up the save file before attempting to use the Phi Mod.

This mod is compatible with existing saves, it does not require you to start a new game.

RimWorld Multiplayer Mods Pack

Make RimWorld a Multiplayer experience! Chat with other players in-game, send items or colonists to each other, trade goods on the multiplayer broker and much more to come!

View Expansion Pack


Version: 1.4

This mod is not updated to RimWorld V1.4
Alert! The PhiClient Mod – RimWorld Multiplayer requires the HugsLib Library and the Harmony Library in order to work.

Older versions Beta 18 Beta 19 1.0 1.3

Phi Mod Review
  • Necessity
  • Originality
  • User Interface
  • Fun


RimWorld Multiplayer? Whaaat? If you thought it was impossible… you were wrong. The Phi Mod brings to you what many players have been longing for: a multiplayer RimWorld! You can now chat with other players even if they’re not on your Steam friend list, and send resources to each other! Instead of waiting for a trade ship to pass by… you can actually call a real human being to get help *cries a little*

User Review
3.14 (77 votes)