Batman: Arkham City' gets Harley Quinn DLC, Game of the Year edition - Polygon
In Batman: Arkham City (2011), you can find Harley Quinn's outfit from Batman: Arkham Asylum (2009) in Joker's Fun House, complete with Warden Sharp's ID tag. : r/GamingDetails
Rubies Batman Arkham City Asylum Harley Quinn Women's Costume : Target
Harley Quinn Batman Arkham Knight Cosplay [Self] : r/cosplay