Eidos and Warner Bros. have announced that a free downloadable map pack will be available for Batman: Arkham Asylum this September.

The Insane Night Map Pack will include two challenge maps and will be available for the PS3, Xbox 360 and PC from the 17th of September. The new maps promise to “hone [players] FreeFlow Combat skills and test their Invisible Predator prowess.”

Read on below to find out more about the two maps.

“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.”

Batman: Arkham Asylum is available now for the PS3 and Xbox 360. The PC version of the game is scheduled to hit shelves today.