Great first-person shooter co-op game where you and three others try to survive a zombie apocalypse. Each chapter in the campaign mode is about getting to the escape vehicle and characters not played by humans will be controlled by the computer until someone joins to play with you. You fight your way from one safe room to the next and if you all die you restart at the last one. The zombies in the game are slow to notice you but when they do they really moves fast and there are also a number of special zombies that demand special tactics. All in all a great game that is really fun to play and it's nice with a game to proves to idiots that people indeed play coop games (you know who you are...).