As had been expected, Electronic Arts today officially announced Army of Two: The 40th Day, the co-op action game sequel featuring the two-man team of Salem and Rios.

In the game, Salem and Rios find themselves in Shanghai, China, which has been almost completely ruined. As they make their way through the city, they'll try to uncover the secret of the 40th Day. According to EA, gamers can expect a lot more co-op moves (more ways to slap butts please), resulting in a more "organic and immersive" experience.

In development at EA Montreal, Army of Two: The 40th Day is out this winter for PlayStation 3, Xbox 360 and PSP.