Pre-ordered mine, got the demo today.. Valve has done it again! IMO, Team Fortress 2 is the ultimate online team fps.. and this game is the ultimate co-op fps! Reminds me of playing DOOM coop on lan years ago.. you start each level at a small room with ammo and supplies, open the door and a horde of zombies comes after you and your friends, you just have to shoot everything that moves (the way I like it!), if you stand still for too much time, more zombies come, so you gotta keep moving.. sometimes zombies can jump on you, or some special zombies (smokers) can entangle you with their tentacle tongues and another player has to rescue you, also if you take too much damage you stay on the floor, you can still shoot to protect yourself, but can't move while no one comes to heal you.. that kind of stuff enforces the team work on the game, also, you can get killed, and if all four players die, you have to restart the level.. the numbers of zombies is impressive, and they can run.. and some can jump! Game is very fun, but not perfect, I have two complains.. first, the demo is too short second, I played the game once on single player mode and then online.. for those with no friends out there, the single player experience is almost as good as the online one, the AI is very well done, the CPU helps a lot and even take some items if they find it first (bastards!), anyway, my other complaint is that on the two times I've played, I played on the exact same levels.. and first time is awesome, second time is cool.. third time.. ok.. and I really don't see this having the lasting appeal of something like TF2.. I see this getting very repetitive after some weeks.. I hope Valve and the community supports this game like they're supporting TF2 with big updates and new maps every now and then, if that happens.. no complains then. So, anyone else got the demo!?