The second Free DLC pack for Batman: Arkham Asylum hits tomorrow September 24th. It’s titled the Prey In The Darkness map pack. Just like the last DLC it has one Free Flow challenge room called Heart of Darkness, it takes place in the Arkham Pumping Station. The Invisible Predator map is called Hothouse Prey, and challenges you to silently take down enemies in an abandoned Glasshouse. Just make sure you don’t throw batstones in batglasshouses(see what I did there?).