Warner has announced a new update for Batman: Arkham City Lockdown is now available for iPad, iPhone and iPod touch. The update includes a new level featuring Harley Quinn, a Bruce Wayne skin and achievements. In it, Batman must track down Harley by fighting his way through her henchmen using new gameplay elements, and the Batarangs in a timed showdown. The update is now live, and free, on the App Store. Screenshots are below.