The problem here is that we introduced a universal CD Key of sorts into the game so that it would effectively be rid of DRM, however, it seems that it has been banned by the developer once again (this is what caused previous problems with this title).

We have contacted them regarding this issue already and are working on a solution as we do realise that having DRMed games is simply not an option.

That is why I'd suggest that if you run the game, you run it offline or adding it to your firewall to block it froma calling home (it should work without the key that way) - we know that it's a very WIP solution and hope for it to be as temporary as possible, and we'll let you know once the issue is resolved and the game is DRM-free once more.

Guys, we've been in contact with the developer for a while now in order to get a build fully free of DRM (not even with a universal CD-Key).

We're hoping to get that ASAP, but the solution in the meantime is to play the game offline if you DO want to play it while it has DRM (so as not to NOT be able to access it entirely).

The build with no DRM is on the way - and I'll inform you in this thread when it does arrive for those that would like to hold off on their purchase until that happens.

DRM check in DEFCON has been removed by the developer.

The game still does seem to try calling home at startup, but that in no way influences single-player mode.

This is DRM check was enabled by a mistake by the DEV. We had a similar problem some time ago with DEFCON but it was fixed, it's back now and we've just been made aware of it. We've asked the developer to create a custom build for GOG in which this is prenatally fixed, unfortunately it will take some time for that to happen.

We apologize for the inconvenience - this is a situation that should not have happened. You are of course entitled to request refunds for the game due to this situation.