Zombies, Zombies, and guess what? More Zombies!
Their are 4 campaign missions you can play. Which are kind of short. And some what easy on the easier difficulties. But don't let that get you down! After you beat on the easier difficulties you can really challenge yourself on the expert difficulty. Which is very hard!!!
After you get done with the campaign there's also a multiplayer where you get to choose from 2 of the campaign missions to play 4 on 4. Four people are the four survivors, then the other four people are 4 zombies, but not just regular zombies...The special infected. You randomly become either a hunter, smoker, or a boomer. But when you reach a part where a tank should be, one of them becomes a tank! Then either when the survivors reach the safe room or they all die you switch sides.
All in all this is a must own game! If you don't buy it, you will be haunted by a zombie till you get it! Just kidding, but really you need this game!