In alphabetical order, a few that I don’t think have been mentioned:
Angel Heart
The Cabin in the Woods
Count Dracula (BBC)
The Crazies
The Descent
The Exorcist III
Ghostwatch
Henry: Portrait of a Serial Killer
The Mist
Night (Curse) of the Demon
The Poughkeepsie Tapes
Se7en
Texas Chainsaw Massacre 2
The Torture Chamber of Dr. Sadism
In alphabetical order, a few that I don’t think have been mentioned:
Angel Heart
The Cabin in the Woods
Count Dracula (BBC)
The Crazies
The Descent
The Exorcist III
Ghostwatch
Henry: Portrait of a Serial Killer
The Mist
Night (Curse) of the Demon
The Poughkeepsie Tapes
Se7en
Texas Chainsaw Massacre 2
The Torture Chamber of Dr. Sadism
Plus a few that aren’t horror, but are unpleasant/unsettling enough to almost qualify:
Bone Tomahawk
Brawl in Cell Block 99
The Day After
Elephant
Heavenly Creatures
Requiem for a Dream (made me physically sick)
The Swimmer
We Need to Talk About Kevin
“Enjoy.”