Left 4 Dead (Xbox 360, 2008)

This is the game where you can reenact such great films like 28 weeks later, or Dawn of the Dead, where it's just you and four friends offline or online, via xbox live or system link and you face hordes of zombies. Zombies as well as "special" infected like the tank or the witch where their zombies that can litterally tear you apart. The best is the AI director where the game plays different everytime you play...it's different everytime! This factor is so good I'll type it again...it's different everytime! So everytime you play with your friends it's an adrenaline rush everytime.