What can I say about this. I would have posted about this earlier, but I was pulled into the demo. Absolutely amazing game. If you do not download this, you are insane. I can't express how incredible the demo is, and if it is any indication of the rest of the game, we are all in for a treat. And don't forget, the same guys who made this, are making Duke Nukem Forever.
For specifics, the demo includes the first few levels of the game, and two multiplayer maps that can be played in Deathmatch or Team Deathmatch mode. The demo clocks in at about 450 megs, and you should download it now. That is all.
Download: 
