Tried multiplayer with a friend that has the Steam version, while I have the GOG version. Seems like the multiplayer relies on invites and friends' list, so, we can't play with each other.
I kind of expected that console owners can't crossplay with PC owners; however, further dividing the community, by not allowing Steam and GOG users to play each other? Bad move on Stainless' part. Should of at least added a direct IP option, or built a master server, even.
This forum is pretty dead, so I don't expect any responses, but hey, at least someone had to say something, lol.