Re: Coopordie not working (Steam version)
Hi widrea,
As far as I can remember, the Quake2 engine provided with the Steam version is not the last one (not the 3.20 release).
I don't know if you can update the game manually and continue to use it the same way through Steam. What I've personally done in the past is to copy the Quake2 folder outside Steam, applied the 3.20 patch, added the COOP or DIE files and played it outside Steam. I think you can start it from Steam like any other standalone game.
If somebody knows how to update the legit Steam Quake2 and play COOP or DIE, please, share your knowledge