Edios and Rocksteady Studios have been fairly quiet about Batman Arkham Asylum. So far Rocksteady has only shown images of what the game will look like, and few images of actual gameplay. Now Rocksteady has finally shown actual gameplay footage of Batman Arkham Asylum. The footage shown only shows the Silent Knight Challenge Mode, if this footage is any indication of how the story mode is going to turn out, then gamers will be in for a treat when Batman Arkham Asylum finally hits store shelves this Summer.