The cross play system works fine for a small group, but it means inconveniencing the entire group. All steam players have to go out of their way to play with GOG players. Now you're asking, well can't people, you know, just do that? However when you want to play on public games, most people could not care less about getting you on. Some do not know what to do to allow cross play. For a supposed "DRM-free" game, it sure likes to shoot you in the foot for the audacity of buying a game anywhere other than Steam. DO NOT BUY THIS GAME IF YOU JUST WANT MULTIPLAYER!
