Gamestop revealed today that North American pre-orders for Batman: Arkham Asylum will receive a code for the “Dem Bones” Challenge Map.

In the challenge map, “Dem Bones”, players will face off against Scarecrow’s army of skeletons. This challenge map will be one of the most challenging maps that the game has to offer, which gives Batman: Arkham Asylum high re-playability. Batman: Arkham Asylum is due out nationwide on August 25, 2009.