Tested and works on Windows 10 and Linux (RimWorld native binary, Debian 9)

• Start Executable with "-host" parameter or add it to a shortcut

• Fullscreen should be on, and also RunInBackground in RimWorld XML Configs

• Also set the resolution to something like 640x480

• Edit the "start_RimWorld.sh" to contain following parameters at start "-host"

• Don't use "batchmode nographics" on linux (autosave on linux broken in batch mode, windows is fine, wine is also broken)

• Don't forget to add a pre-generated singleplayer savestate, that will be started in host mode.

• Also don't forget to copy over your pre-configured mod list config. (how do you want to configure it without a gui duh)

• The host mode loads always the file with the newest timestamp. Replay saves have priority over normal saves.

• Use a fake framebuffer display driver (sudo apt-get install xvfb)

• Then execute (or add to the sh file) "Xvfb :1 -screen 0 640x480x24 &"

• Then execute (or add to the sh file) "DISPLAY=:1 ./start_RimWorld.sh"

• Now the server should run fine

In my case the localhost ports were blocked by iptables. Add those lines into your config (/etc/iptables/rules.v4)

• iptables -A INPUT -i lo -j ACCEPT
• iptables -A OUTPUT -o lo -j ACCEPT

Yeah, im lazy. Feel free to edit "Multiplayer.cs" and recompile heh