In Batman : Arkham City Blackgate has been moved to the Gotham mainland .
In Batman : Arkham City ( the sequel to Batman : Arkham Asylum ) , Arkham and blackgate has been relocated to the Gotham mainland as part of Quincy Sharp 's Arkham City project with neither Blackgate Penitentiary or Arkham Asylum in any condition to hold inmates or patients after it was ravaged by Poison Ivy in the first game .
Arkham Asylum