“Your mother's in here, Karras. Would you like to leave a message? I'll see that she gets it.”
― Pazuzu, 'The Exorcist' (1973)
After combing through movie lists from IMDB to Reddit, I think I've created the most complete collection of horror movies that climb inside your skull and mess with your brains.
Some people claim that the benchmark of true psychological horror is that the truly petrifying aspect is what isn't shown, not necessarily what is. But I've also included horror films that rely on the wholesale disintegration of the human psyche, and films where characters begin to lose faith in what is strictly real.
Beginner's Guide: Psychological Horror, via Film Inquiry:
What Exactly Is a 'Psychological' Horror Film?, via PopMatters:
The Top 10 Greatest Psychological Horror Movies, via WatchMojo:
Why 'The Shining' is the Best Psychological Horror Film Ever, via The Tangential:
Why We Crave Horror Movies (PDF), via Stephen King:
Common Themes in Psychological Thrillers, via The Artifice:
Death, Grief & Why Horror Films Matter, via Talkhouse:
The Psychology of 'Annihilation', via Storytellers:
Psychological Thriller ‘Oculus’ Challenges Perceptions Of Horror Genre, via The Heights:
Psychological Horror in the Films of David Lynch, via film-o-holic:
Last updated September 30th: Added Tales From the Hood 1 & 2, The Babysitter (2017) 1 & 2 and The Collected (The Collector 3). Films yet to be added (missing in database): Amityville 1974, Beyond the Green Inferno, The House on the Edge of the Park 2, Pumpkinhead (remake), Cannibals (sequel to Cannibal Holocaust), Laid to Rest: Exumed, Shrooms 2, Hellraiser TV series, Tremors: Island Fury, Tales From the Hood 3. Hannibal Lector films sorted under "Hannibal", Iterview With a Vampire & Queen of the Damned sorted under "Vampire Chronicles".