Eidos have today announced Prey in the Darkness, a new Map pack for Batman: Arkham Asylum. The map pack will be available from tomorrow, September 24th, as a free download on the PlayStation Network and Xbox Live.

The content includes:

'Heart of Darkness' FreeFlow Combat map: Players will battle a mob of relentless and maniacal enemies at the Arkham Pumping Station. Even the most seasoned Batman: Arkham Asylum player will enjoy stepping into the boots of BATMAN to take down increasingly difficult waves of insane inmates.

'Hothouse Prey' Invisible Predator map: Players will have to rely on their Predator instincts to silently and effectively take down enemies at the Abandoned Glasshouse.