More than “two hours of fresh gameplay” will be added to last year’s award-winning Batman: Arkham City by the “Harley Quinn’s Revenge Pack”, a piece of downloadable content which will become available from PlayStation Network and Xbox LIVE worldwide from May 30th. The mission sends players back into Arkham City, playing as both Batman and Robin, in order to uncover Harley’s plan and shut to prison forever.

The DLC will also be included on the Batman: Arkham City Game of the Year Edition, which Rocksteady today announced for a release on September 7th in the UK. The edition includes the Catwoman Pack, Nightwing Bundle Pack, Robin Bundle Pack, Challenge Map Pack, Harley Quinn’s Revenge Pack, and Arkham City Skins Pack. That’s seven maps, three playable characters, and twelve skins beyond the original retail release.

You can check out four initial screenshots from the new edition of the game by clicking on the thumbnails below, and find out more about the game on its official website here.