How to Connect to Your Core Keeper Server
How to join your Core Keeper server using a Game ID or direct IP connection.
Connecting via Game ID
Find the Game ID in GameID.txt (generated next to the server executable).
In the XGamingServer Panel, check the Console or Files for this file.
Launch Core Keeper → Join Game → Join With Game ID.
Paste the Game ID and click Join.
📝 Note: Game ID mode uses Steam Datagram Relay — no port forwarding needed, but only Steam players can connect.
Connecting via Direct IP
Requires -port to be set in the server startup. Enables crossplay (Steam, Epic, Microsoft, GOG).
Find the connection string in GameInfo.txt (format: IP:PORT::PASSWORD).
Launch Core Keeper → Join Game → Join With IP.
Paste the connection string and click Join.
Ports 27015 + 27016 UDP must be forwarded.
Troubleshooting
| Issue | Fix |
|---|---|
| "Game Not Found" | Game ID may have changed after restart — re-check GameID.txt |
| Connection timeout | Verify ports 27015/27016 UDP are forwarded (Direct Connect mode) |
| Version mismatch | Both client and server must be on the same version |
| Crossplay not working | Must use Direct Connect mode (set -port in startup) |
Related Guides
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