Recs.
Updated
Left 4 Dead 2 is a co-op first person shooter from Valve. The game features four survivors, each played by an online or offline player (or sometimes just bots), whose role is to cooperate and try to make it through an assortment of campaigns, each with different game modes. This is done through with the help of a variety of weapons.
SpecsUpdate
Pros
Pro Unique co-op versus mode
Left 4 Dead 2 features a versus mode that pits two teams against one another. One takes on the role of survivors, which is very similar to the normal campaign. The other team, however, plays as the infected, opening up a whole new play style and set of strategies.
Cons
Con More of the same
While the game has been improved compared to the original, there are no wildly different game mechanics. If you did not have much fun with Left 4 Dead, you will probably not get much enjoyment out of the sequel. Some have gone so far as to complain that it feels like a large DLC update rather than a discrete game.