Run NoxSerialFixGOG.bat as Administrator and follow the interactive prompt.Extract the contents of NoxGUI_latest.zip to your Nox installation directory Default: C:\GOG Games\Nox, overwriting game.exe in the process.Run setup_nox_2.0.0.20.exe as Administrator.Nox Installation Guide: GOG.com version (Re-enables online multiplayer!) Now your Nox installation is complete, but you will also need a username & password to play online, the handiest way to register a username is through the website.