Mount Massive Asylum

The Mount Massive Asylum for the Criminally Insane.jpg
The Mount Massive Asylum for the Criminally Insane

The Mount Massive Asylum for the Criminally Insane, also known as the Mount Massive Asylum, is an insane asylum located within the remote mountains of Lake County in Colorado, USA, and it is the setting of the horror videogame Outlast and it's sequel Outlast: Whistleblower.

Due to illegal experiments performed on patients, Mount Massive Asylum was then taken by the very prisoners residing there. There was chaos at the asylum as it became a bloody massacre. Hundreds of serial killers, rapists, the mentally ill, pyromaniacs, psychopaths, cannibals and other worst kind of human beings imaginable were loose inside the mental institution. There was blood, flesh, screams, corpses everywhere, as the Mount Massive Asylum has became hell on Earth after the inmates' uprising and the carnage it caused, no one knows what happened inside the asylum after the army stormed the venue.

1945 - The O.S.S. initiates Operation Paperclip, recruiting scientists from Nazi Germany to conduct research for the United States of America.

1967 - Mount Massive Asylum for the Criminally Insane is established. 3 scientists are murdered by an unknown patient. Authorities order the asylum to cease all activities.

1971 - Mount Massive Asylum is finally closed.

1972 - CIA Director Richard Helms orders all MKUltra files to be destroyed. A small number of documents survive, scattered throughout the asylum.

2009 - The clinic was re-opened by the Murkoff Corporation, which for the next several years conducts illegal experiments on patients with the sole purpose being profit.

Known Inmates


  • Mount Massive is based off a real mountain of the same name, located in the Sawatch Range of the U.S. state of Colorado.
  • Mount Massive Asylum is modeled after the H. H. Richardson Complex, which is also a mental asylum located in Buffalo, New York.
  • The Mount Massive Asylum for the Criminally Insane shares similarities with the Vannacutt Psychiatric Institute for the Criminally Insane from the 1999 horror movie House on Haunted Hill.


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