Batman: Arkham Asylum’s getting free DLC on September 17, and has been confirmed that it will be made available for PC and Xbox 360 as well according to a developer post on the forums.
Unfortunately what the download content actually is hasn't been announced leaving fans of the recent Batman: Arkham Asylum slightly perplexed. Rumor has it that the DLC will be the Insane Night DLC Pack, which contains the Dem Bones Scarecrow Challenge and Crime Alley Challenge Map Packs, these were included in the Collector's Edition for people who pre-ordered from GameStop.
