Left 4 dead 2 is 45 on gamestop.com with a free in game bat. The game looks great, more weapons, grenade launcher, frying pan, cro bar, chain saw, and maybe some other things. each level has a different type of zombie i believe, for example the carnivall level has a clown zombie that when he walks his shoes squeek and brings hordes of zombies. There are 5 campaigns instead of 4, and there are suppose to be multiple ways to finsh a campaign and the AI director will block different ways each game.