Batman Arkham City Lockdown was released for iPhone, iPod Touch, & iPad as a universal app a few days ago. The game plays a little like Infinity Blade, with Batman. You go through missions, fighting of villains one by one with swipe controls. You can do things like combo moves as well as some specials by tapping the bubbles that pop up during a fight. Lockdown looks great, plays great, and overall pretty fun. On the premium side of things, $5.99 for this game seems like a steal! Check it out in the app store with the link below.
Batman Arkham City Lockdown for iPhone 3GS, iPhone 4, iPhone 4S, iPod touch (3rd generation), iPod touch (4th generation) and iPad on the iTunes App Store