Army of Two: The 40th Day is the sequel to Army of Two. It's a third-person action game on the PS3 where players take on the roles of two mercenaries, Rios and Salem, facing a city in ruins during a devastating invasion. The game emphasizes cooperation between the two characters, offering team-based gameplay mechanics and the ability to customize their weapons and gear. Players must make moral decisions that impact the story's outcome, and the game features intense combat and tense situations in a post-apocalyptic setting.