Batman Arkham City DLC Harley Quinn's Revenge official Trailer. Robin (Tim Drake) enters the Steel Mill to rescue the Dark Knight from Harley! Is this the end of the Dynamic Duo? Find out May 29th 2012!

Harley Quinn's Revenge DLC walkthrough part 1 - http://youtu.be/WhiDww_NCCQ
Batman Akrham City Walkthrough & DLC maps - http://www.youtube.com/playlist?list=PLA240D900F373A51F&feature=plcp

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