Arkham Asylum for the Criminally Insane is a fictional setting, a psychiatric hospital that, for the purpose of this roleplay, is set in New York, New York. Arkham Asylum's origins belong to the DC Universe, where the asylum is located in Gotham City.

Season one participant Cillian Crowe hailed from Arkham Asylum.

Given trends towards realism in later versions of SOTF, the existence of Arkham Asylum in the universe should be considered unlikely unless the staff rule otherwise, and Cillian should most likely be considered an inmate from a non-DC Comics New York psychiatric hospital.