#4 Far Cry 3
In addition to Far Cry 3’s lengthy single-player campaign and competitive multiplayer offerings, the game comes with a co-op mode that has a lot in common with Left 4 Dead.
Players fill the roles of four characters who must venture through an island in search of the man who betrayed them and left them for dead, laying waste to mercenaries and pirates along the way. In addition to killing dudes on the regular, players can earn unlocks for their weapons and characters, which carry over to any progress they make in competitive multiplayer.