Add an exception for GroundBranch.exe in Windows Defender to prevent blocked packets.
If you are hosting, you must forward UDP Port 7777 (Game) and UDP Port 27015 (Query) in your router settings.
One player acts as the host. Great for quick co-op with friends, but if the host lags or crashes, the whole session is affected.
Because of the "one-tap" lethality, a ping under 80ms is ideal. High latency causes "rubber-banding" and delayed hit registration.