Payback’s a bitch, especially when dealing with The Joker’s most psychotic sidekick, Harley Quinn. Harley is the new boss of Arkham City and is determined to make Batman pay for what he’s done to The Joker. Warner Brothers and DC Entertainment have released a new trailer for Harley Quinn’s Revenge Pack, the final chapter of Batman: Arkham City saga that adds more than two hours of fresh single-player gameplay to the critically-acclaimed title from Rocksteady Studios. The Harley Quinn’s Revenge mission sends players back into Arkham City to face their final challenge as they interchange between playing as both Batman and Robin. Harley Quinn’s Revenge Pack releases on May 30th for $10.