Batman: Arkham City - Game of the Year Edition (Xbox 360)

The Harley Quinns 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 Harleys all new gang of thugs.

The DLC included on disc includes the Catwoman Pack, Nightwing Bundle Pack, Robin Bundle Pack, Challenge Map Pack and Arkham City Skins Pack.
All told, Batman: Arkham City Game of the Year Edition packages new gameplay content, seven maps, three playable characters, and 12 skins beyond the original retail release:

Maps: Wayne Manor, Main Hall, Freight Train, Black Mask, The Jokers Carnival, Iceberg Long, and Batcav

Playable Characters: Catwoman, Robin and Nightwing

Skins: 1970s Batsuit, Year One Batman, The Dark Knight Returns, Earth One Batman, Batman Beyond Batman, Animated Batman, Sinestro Corps Batman, Long Halloween Catwoman, Animated Catwoman, Animated Robin, Red Robin and Animated Nightwing

Batman: Arkham City builds upon the intense, atmospheric foundation of Batman: Arkham Asylum, sending players flying through the expansive Arkham City five times larger than the game world in Batman: Arkham Asylum the new maximum security home for all of Gotham Citys thugs, gangsters and insane criminal masterminds. Featuring an incredible Rogues Gallery of Gotham Citys most dangerous criminals including Catwoman, The Joker, The Riddler, Two-Face, Harley Quinn, The Penguin, Mr. Freeze and many others, the game allows players to genuinely experience what it feels like to be The Dark Knight delivering justice on the streets of Gotham City.