Eidos sends word that the Insane Night Map Pack will be available on the PlaStation Store, Xbox Live Marketplace and Games for Windows Live Marketplace starting September 17th. The map pack includes the FreeFlow Combat map and the Invisible Predator map and will be available for free.

In the ‘Totally Insane’ FreeFlow Combat map, players’ will be tested to their fullest as scores of escaped lunatics bear down upon BATMAN as they make their escape through the asylum’s secure records facility. These fast-moving foes will challenge all but the most practiced players, with quick reactions and expert timing needed to fend off wave upon wave of insane inmates, bent on taking down the DARK KNIGHT. In the ‘Nocturnal Hunter’ Invisible Predator map, players take on a wholly different approach, practicing their predatory skills to remain in the shadows, utilizing the Arkham watchtowers and Batman’s arsenal of gadgets to gain the upper hand on The Joker’s army of goons patrolling below.