SelfServr Guide
Risk of Rain 2 Dedicated Server Setup
How to get a Risk of Rain 2 dedicated server running on your own machine, from downloading the server files to starting it up.
1. Get the server files
Risk of Rain 2's dedicated server is distributed through Valve's SteamCMD tool, under Steam app ID 1180760. If you don't have SteamCMD installed yet, follow our SteamCMD installation guide first.
From a SteamCMD prompt (or as command-line arguments), run:
force_install_dir "C:\GameServers\RiskOfRain2" login anonymous app_update 1180760 validate quit
A handful of dedicated-server tools require a Steam account that owns the base game instead of an anonymous login. If login anonymous is rejected, replace it with login <your-steam-username> and enter your password when prompted.
2. Required ports
Forward these ports to the server machine's local IP address on your router, and allow them through the server's firewall. See the port forwarding guide for how.
3. Start the server
Windows
start_headless_server.bat
This launches Risk of Rain 2.exe in headless mode. Linux hosts commonly run the same Windows build under Wine (e.g. via Xvfb), since there's no native Linux server build.
4. Save it as a script (optional, but recommended)
Saving the commands above as scripts means starting and updating the server is a single double-click instead of retyping them, and it's what lets Task Scheduler or systemd start the server for you -- see keeping it running 24/7.
Start script
Windows -- start-server.bat
@echo off cd /d "%~dp0" start_headless_server.bat
Save either script in the same folder as the server executable -- %~dp0 (Windows) and $(dirname "$0") (Linux) both mean "wherever this script itself lives", so it works regardless of the exact path you installed to.
Update script
Adjust the SteamCMD path below if yours isn't at C:\steamcmd:
Windows -- update-server.bat
@echo off C:\steamcmd\steamcmd.exe +force_install_dir "C:\GameServers\RiskOfRain2" +login anonymous +app_update 1180760 validate +quit
Linux -- update-server.sh
#!/bin/bash steamcmd +force_install_dir "/home/steam/GameServers/RiskOfRain2" +login anonymous +app_update 1180760 validate +quit
Adjust the install path above to wherever you actually want the server on your Linux machine -- it's shown as an example, not a requirement.
5. Generate a config file
Use the Risk of Rain 2 config generator to fill in server name, password, max players and more, and download a ready-to-use server.cfg.
Open the Risk of Rain 2 config generator →Keep it running
Once your Risk of Rain 2 server is working, see our guide on keeping it running 24/7 so it survives a reboot or crash without you needing to start it by hand.
Frequently asked questions
How do I install a Risk of Rain 2 dedicated server?
Download it with SteamCMD using Steam app ID 1180760, then run it from the install directory. See "Get the server files" and "Start the server" above for the exact commands.
What port does a Risk of Rain 2 server use?
UDP 27015, UDP 27016 by default, forwarded to the server machine's local IP address. See the port forwarding guide for how.
How do I configure a Risk of Rain 2 server?
Use the Risk of Rain 2 config generator to fill in server name, password, max players and more, and download a ready-to-use server.cfg.
How do I keep a Risk of Rain 2 server running?
Set it up as a Windows Task Scheduler task or a Linux systemd service so it survives a reboot or crash without you starting it by hand -- see the keeping it running 24/7 guide.
Players still can't connect?
If the server starts fine but friends can't reach it, see the connection troubleshooting guide -- it covers CGNAT, firewall issues, port forwarding mistakes and more, and includes an interactive diagnostic.