| Problem | Solution |
|---------|----------|
| Crash on launch | Run ron.exe as Administrator. Disable Discord/RTSS overlays. |
| No sound | Install DirectX 9.0c (yes, even on Win 11). |
| Multiplayer desync | Both players must set Network Latency to High in Game Lobby. |
| “Failed to join game” | Forward ports: TCP 27015-27030 or disable Windows Defender Firewall temporarily. |