The game does not work offline. If you try to run it, the game will load, show a black screen and then nothing else. If you check the game's log file you will see the following lines : "UnityEngine.Logger:Log(LogType, Object) UnityEngine.Debug:Log(Object) StartGames:OnlineToGame() Curl error 6: Could not resolve host: docs.google.com Cannot resolve destination host" If the dev has no intention of enabling offline functionality, this game doesn't belong on GOG.