Celebrating the wide acclaim of their 2011 action title, Warner Bros. and Rocksteady Studios have announced a Game of the Year Edition for Batman Arkham City that will come packed with the five previously released downloadable content expansions as well as a newly announced story expansion centered around femme-fatale Harley Quinn -- promising an additional "two hours of fresh gameplay".

Fans who already own an original boxed edition of Batman: Arkham City can experience the new gameplay by downloading the Harley Quinn’s Revenge Pack, which will be available in all international markets beginning May 30 in the PlayStation®Network and in the Xbox LIVE® Marketplace for Xbox 360.

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. Gamers must utilise each of the characters' unique combat and investigative skills to uncover Harley's vengeful plan and shut the gates on the urban mega-prison forever. In addition to experiencing a new storyline, fans can explore new environments and face-off against Harley’s all new gang of thugs.

Batman Arkham City Game of the Year Edition is due on September 7th 2012 for PC, Xbox 360 and PlayStation 3. Watch the GOTY Edition trailer embedded below or click here for the HD video page.