Army of Two: The 40th Day is a third-person shooter video game from Electronic Arts. Players take control of two mercenaries, Rios and Salem, who find themselves in the middle of a disaster that is devastating Shanghai, China. As they fight their way through ruined city districts they attempt to uncover the secret behind the mysterious catastrophes that are occurring. The game features new co-op moves that can be used by either player at any time which creates more strategies and choices for both players during gameplay.