So since LAN works... is it possible for Steam and GOG versions to play together? The question was asked in the original post but not yet answered.

Thanks.
It doesn't seem like it is. Galaxy seems to be required for online multi-player matchmaking but you can set up multi-player sessions yourself, online or not.

I am not sure if you are intentionally trying to mislead people but GOG support emailed me directly in response to a support ticket. They said

"Hello

Unfortunately no, multiplayer is available only between GOG Galaxy users. There is also no LAN multiplayer.
Sorry for the inconvenience.

Regards
Genoan
GOG.com Support"

Oh well, I own the game, I played it, I streamed it. I know what options it has. But you do not need to believe me. For your convenience I uploaded a screenshot. But I'm sure you understand I'll not go the lengths to make a video to show it in detail. I'm not going to argue here. But immediately assuming bad intentions towards another person isn't very nice. I just want to help. Believe whatever you wish to believe.

Yes you can do that with the LAN option. I took one for the team and bought it again on GOG (have it on steam already). I just did some testing between steam and gog versions and I could not get them to stay connected, every time I could find and connect to the other PC from either one, but it would disconnect immediately. There may be a way of making it work but I could not figure it out.

When I put the GoG version on both PCs it connected right away first try, nothing special. This is awesome!

I apologize but I often see people spreading misinformation on the internet and i thought that this was the case here since i heard the exact opposite from support. I too wanted to help people not make a purchasing decision based on what I thought was not the truth.

The support person who told me LAN was not supported jumped into another thread I posted in and confirmed he was wrong and LAN is supported. I would post the link to that thread but GOG wont allow me for some reason. Its the "Multiplayer only available for GOG Galaxy users" thread


Thanks,
Stinky