Does this version have the login requirement removed? I've bought it both on steam and the humble introversion bundle, and In both it can't connect to the authentication server, thusly regulating me to the demo version even though both copies are entirely legitimate = (

Ah I didn't read the description properly, it still requires you to connect to the authentication server. Which is pretty bad show as it's effectively DRM (and terrible, consumer harming DRM at that) on a site who's primary claim is DRM free, customer friendly games.

Nevermind, it seems on febuary 2012, the authentication servers were fixed, thereby allowing the game to be played again.

I'm still disapointed that such blatent DRM exists on gog.com, but at least it works for now.

Yes, it's somewhat disappointing but there is the fact that DEFCON lets you set up LAN games by IP.

I know that's a little off-topic, but since you've got two different versions, could you please explain, how are the activation keys handled there? I mean, are the different OS versions already activated with the same key or it was provided separately?

So, no authentication server is required to play DEFCON on a LAN?

edit: on my Humble Bundle version of DEFCON, the game requires online activation to unlock to the full version (DRM, in other words). If this is the same as how the GOG version is, then the GOG version does indeed have DRM.

I'm starting to wonder about this myself. I played a game of single player and it didn't require me to enter the serial number it gave me when I bought the game, nor did it ask me to, and I wouldn't have since I was only interested in playing single player.

When I went to play it a second time, someone tried to join my game. I changed the settings the first time to not advertise on the internet etc., but apparently these settings don't save. I didn't think it mattered since I didn't input the serial number anywhere and therefore should not have access to multiplayer, so I didn't bother to change the settings again. So was I surprised to see someone else connect.

I backed out to the main menu, and noticed at the bottom of the screen it said "Authentication Status Accepted." I quit the game and started it up again, and noticed it now said "Authentication Status Unknown" for a couple of seconds before it changed to Accepted. If I start the game with internet access disabled, it does not change to Accepted, so it does appear to be connecting to the authentication servers upon startup.

Single player still works if it can't connect to the auth. server, but it has previously done so, so I'm not sure what would've happened if I had never allowed it internet access.

I haven't authenticated at any point and I was able to get full access to the single player content.

Don't know about LAN, but I would be interested to know if someone else has found out.

For me, the game doesn't work at all if I don't give it internet access. Even the tutorial won't work without internet.

I'd still like to know why it is that GOG has stated multiple times that they are DRM-free...and yet this game requires CD-key server authentication in order to play a portion of it.

Don't get me wrong: I would have no problem doing it, but at the same time, it goes against one of the primary values of GOG.

Are the keys still working? I haven't introduced any key at all and I'm allowed to play single and multiplayer without any problems at all.

Ok thanks! I've introduced my own serial now just in case

I don't understand posts . I bought this game but not yet downloaded . This game is really have a DRM ? :/ I really hate DRM :S

Hy!
I'm a newbie here... and I had a few question.
Wtf is " DRM " ? :D
I bought a few hour ago Defcon but I don't have enough time to try it....
I hope I don't have any problems with the game :/

(sorry for my grammar mistakes. English is not my native language)