Faith and a .45 Co-Op Details
In single-player, you take control of Luke with Ruby as the second member of your squad, while in co-op (online or off -- jump in/out at any time) the second player controls Ruby directly. You have light squad control features in the single-player mode along the lines of a Gears of War, but the game does a few things you might not expect if you think of it as a "squad" game.