Arkham City has come to the iPhone, iPod Touch and iPad in the form of Batman: Arkham City Lockdown. The brand new Infinity Blade II-style fighter made its debut on iOS devices last night, and is available for download now from iTunes and the App Store. In addition to Unreal Engine-powered battles with enemies including The Joker, Two-Face and the iOS exclusive Deathstroke, the game features awesome extras including variant skins and bonus content.