The single player campaign to Batman: Arkham City comes to a conclusion with the Harley Quinn's Revenge Pack.
Harley Quinn, the Joker's mental sidekick, is the new boss of Arkham City, and as the title suggests, she is out for revenge.
The DLC pack promises to add another two hours of gameplay, by send players back into Arkham City to face their final challenge (where play will alternate between Batman and Robin).
The content will be available from May 30, and will cost Xbox 360 users 800 MS Points and PlayStation gamers Ł7.99. Alternatively, if you can be patient, a Game of the Year Edition will be available on September 7, and all previous DLC, including Harley Quinn's Revenge, will be included.