Left 4 Dead 2
Console(s): Xbox 360
What's great for a dorm about Left 4 Dead 2 is how heavily the game emphasizes co-operative gameplay in its campaign mode, allowing you to play with up to three other players as you all fight to survive against the Infected. Rarely is working together so stressed in a video game, making the title one of the Xbox 360's truly essential, exclusive releases. Remember: leave no man left behind. Otherwise, you might just be left playing by yourself by the end of the school year.