Fight Togerther. Survive Together. A carefully orchestrated series of mysterious catastrophes is dragging Shanghai, China to the brink of ruin, and now the Army of Two must fight their way through ravaged city districts as they try to beat the odds and uncover the secret of the 40th Day. Army of Two: The 40th Day has been built from the ground up with a focus on an incredible cooperative experience. The result is a bigger, better, more organic and immersive co-op experience that lets you put your best two-man tactics to use whenever and wherever you want.