tastymonkey: Is it only online? I tend to play multiplayer games with my eldest and I don't want to deal with an Internet requirement.

tastymonkey: Is it only online? I tend to play multiplayer games with my eldest and I don't want to deal with an Internet requirement.

Kevin04: Coop technically works, in general. I didn't experience any problems actually establishing a session, i. e. joining and staying in a game worked fine.

However, just as a warning, the coop experience once playing was abysmal for us. It's all pretty fine for the host, except that it looks like the coop partner lags a lot. The partner however has to deal with a lot of lag and sync problems, including being teleported back to previous positions (in extreme cases even 10 seconds of moving or more are lost, multiple times), the game world not updating properly (breakable walls stay intact after breaking, eaten orange goos are still there, grappling seeds can't be placed, ...), the proton tether being very unreliable with janky camera movement so grappling is a real risk or all kinds of stuff just not working for the partner at all so you have to let the host do it. We got surprised with new ways the game breaks for the coop player right until the very end. It's completely inconsistent - you can still finish the game that way, even 100% as we did, but it's a frustrating.

I have no idea if it's an isolated problem for us (four people in three different households). Apparently it works fine on Steam, because we had another pair of players there. Swapping hosts didn't help. It's definitely an odd one out for us, we play other games too and they work fine, even over Galaxy.

EDIT: "breakable walls stay broken" made no sense, also fixed some minor grammatical errors

Riskyy: I'm having the opposite problem suddenly. Not having much lag or desync, even on the non host but now I can't get the actual co-op game to remain connected. After about 2 minutes of play we're constantly getting booted out saying "Lost connection to co-op player". Was working fine about a week ago, we've played up to about 45% completion according to the save file when we load in. Now it's unplayable.

We're both on the same connection and it doesn't drop internet or anything when we get booted. Have restarted router, both PC's, verified via GOG Galaxy.

Anyone know if there's anything we can do? We were really enjoying the game so would be gutted if we can't finish it.

dmoogie: same problem here. coop worked great over a few sessions, now at ~35% completion, and we can't play more than 4 minutes without losing connection. i am host. my partner (with new gaming PC) describes flashing and lagging on his end, then lost connection. has happened last 2 sessions during last week in Jan. each time we tried 3 times. then played something different.