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
- 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
- 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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