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Left 4 Dead 2 is a co-op first person shooter from Valve. In the game, 4 Survivors try to make it through multiple campaigns with different game modes by using a variety of weapons.
SpecsUpdate
Pros
Pro Unique forced cooperation
Left 4 Dead 2 requires players on the same team to cooperate to survive. This makes for an interesting dynamic for teammates, as it will be increasingly difficult to make it through a level is any one player on the team decides to go off on their own instead of staying with the group and cooperating.
Pro Unique co-op versus mode
Left 4 Dead 2 features a versus mode that pits two teams against one another. For the survivor team, it is basically the same game as the normal campaign. However, versus adds a new way for teammates on the opposing team to work together by playing as the infected, which opens up a whole new play style and set of strategies.
Pro Invigorating cooperation based survival dynamic
Left 4 Dead 2 requires players on the same team to cooperate to survive. This makes for an interesting dynamic for teammates, as it will be increasingly difficult to make it through a level if any one player decides to go off on their own.
Pro Turn the gameplay upside down by hunting the hunters in a unique co-op mode where you play as the zombies
Left 4 Dead 2 features a co-op 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.