Left 4 Dead 2
The Left 4 Dead series is specifically built for those who are interested in coop. Let me just state for the record that Left 4 Dead 2 coop is a blast and there are very few games of such caliber that let you play coop in such a manner. Every stage is playable and populated with foes specifically meant to force players to play together. While the first game was strong, and had brilliantly designed elements to enhance the co-op experience, Left 4 Dead 2 goes a few notches up and really perfects the formula of coop.














