Filmed at Land of Illusion Haunted Scream Park outside Middletown, Ohio.
At the beginning of the film, Dahmer, Bundy and Gacy are mentioned. This is just before the films psychopaths are introduced as The Cannibal, The Lady Killer, and The Clown. Jeffery Dahmer was a cannibal, Ted Bundy killed women , and John Wayne Gacy used to enjoy dressing as a clown.
Lord of Illusion Funhouse is named after Clive Barker's book and movie "Lord of Illusions" (1995).
Filmed partially in Middletown, Ohio.
One of the notes at the motel crime scene reads "The cake is a lie", a reference to the video game series Portal.