Mount Palmer Psychiatric Institute

The Mount Palmer Psychiatric Institute is a branch of mental hospitals that originated in Pacific Glade in the 1930s. When they were brought under fire for questionable medical practices, the asylum packed up and migrated further east, eventually resulting in a chain of hospitals across the nation. In the modern day it is a reputable organization, although Rosen Corp often draws patients from its hospitals for their human augmentation trials.

On the Mountain of Madness

 * Mark Hannigan encounters the ruins of the original Mount Palmer Insane Asylum while pursuing Lester Barlow. After a car crash, Mark is transported to the asylum when it was fully functional in the 1930s. He manages to escape with the help of Deacon, but not before losing his mind and hallucinating old enemies from his past. However, it is unclear whether Mark was actually transported back in time or if the events in the asylum were all in his head.

Mary Ellen's Eyes

 * The serial killer going by Mary Ellen Irving is speculated to have escaped from a western branch of the Institute, although her whereabouts after the summer of 1992 were never confirmed.

The Staircase in the Library

 * A drug addict and mental patient named Dylan McAllister was abducted from the Mount Palmer branch in Minnesota by agents of Rosen Corp. His disappearance was never reported by any major local papers, and even though he was rescued by Julianna Park, correspondence within the agency reveals that he was later found and returned to his augmentation trials.

Fleshy Sensoria

 * Tom Ingram unearths information about Mount Palmer in the Rosen Corp database, confirming that Rosen Corp has the mental institute in their pocket. Because their trials are immensely dangerous and many participants don't come back alive, they prefer to use test subjects who won't be missed if something goes wrong.