Army of Two: The 40th Day on PS3 is a 2010 third-person shooter developed by EA Montreal and published by Electronic Arts. This sequel to Army of Two (2008) reunites series heroes Tyson Rios and Elliot Salem as they find themselves trapped in Shanghai when a terrorist group leads a devastating attack that causes the city to fall into chaos [web:732][web:733][web:734]. Set a few years after the original game, Rios and Salem now run their own paramilitary business called TransWorld Operations (TWO) with help from mission coordinator Alice Murray, but during what seems to be a routine mission they're surrounded by competing private military contractors intent on running amok [web:735][web:738]. The game focuses on two-player cooperative play with groundbreaking co-op functionality, featuring the buddy system for leaping through enemy attacks, the return of the Agro system (a meter determining who enemies perceive as the bigger threat), new cooperative moves providing fresh strategies, and four-player co-op Extraction mode [web:735][web:736]. It includes advanced weapon customization and upgrade systems, a cover system, four explosive online multiplayer modes focused on cooperative play, and can be played with an AI partner if you don't have a human partner [web:735][web:736].