TeamXbox offers impressions of the upcoming game.
"Although the game can be played solo, all of Army of Two's gameplay revolves around the idea that co-op isn't simply a mode, it's the actual game. This means that you'll be able to do the same things with an AI partner as you could with a real life buddy, and vice versa. From what we've seen, the I in AI actually does stand for intelligence, something that not all games can say for themselves. The best way to describe the game is as a "tactical shooter," meaning you'll probably get smoked if you just run into a situation with your guns blazing."