blakstar: I thought I'd post an extra bit of information, and hope I didn't miss any comments after reading through this topic quickly!
I know most of the comments here refer to the Windows version, but I thought I'd give the Linux version a try after reading much of this topic.
It would seem that the Linux version works OK with the pre-authenticated key when connected to the Internet. It displayed "Authentication Status: Unknown" when disconnected, however it seemed to be OK, as far as I could tell, but I must admit I didn't test it much.
No, I'm not suggesting that people try to use the Linux version, but I thought, since it's available for both Windows and Linux, that it was worth mentioning.
What does it say at the bottom when you are connected? On windows it says "key revoked". If the Linux version is fine, my guess is that it's been packaged with a different key that the dev hasn't revoked yet.
WakaloX99: They found out that one game is with DRM.
And everybody loses their minds! :))))))
Well duh. GOG is supposed to be DRM-free.