Behind Locked Doors (1968)

A young, beautiful career woman rents a backwoods cabin to write her first novel. Attacked by a group of local lowlifes and left for dead, she devises a horrific plan to inflict revenge.

In the late 18th century, two newlyweds move into the stately mansion of the Fengriffen family. The young bride is victim of terrifying visions and apparitions, threatening her very sanity. A London psychiatrist comes to her help and uncovers the terrible secret that haunts the estate.

With his partner, a celebrity performance artist publicly showcases the metamorphosis of his organs in avant-garde performances. An investigator from the National Organ Registry obsessively tracks their movements, which is when a mysterious group is revealed... Their mission — to use the artist's notoriety to shed light on the next phase of human evolution.

Amanda's deathbed request to her son, John, was for him to destroy all the lab notes etc. from her last experiment. She also blurts out he had a brother. At the funeral John meets Melissa, who claims to be his mother's biggest fan. Together with some of John's friends they go to Amanda's house, but none are prepared for what they find there.

Crazed members of a sadistic family return to their childhood home to terrorize the new owners.

A hedonistic man finds a mysterious puzzle box that summons a group of gruesome beings known as the Cenobites. These otherworldly entities open the doors to a dominion where pain and pleasure are indivisible.

In town for a job interview, a young woman arrives at her Airbnb late at night only to find that it has been mistakenly double-booked and a strange man is already staying there. Against her better judgement, she decides to stay the night anyway.

When a group of misfits is hired by an unknown third party to burglarize a desolate house and acquire one rare VHS tape, they discover more found footage than they had bargained for.

Catherine, a novelist with an insatiable sexual appetite, becomes a prime suspect when her boyfriend is brutally murdered -- a crime she had described in her latest story.

Two teenage couples traveling across the backwoods of Texas searching for urban legends of serial killers end up as prisoners of a bizarre and sadistic backwater family of serial killers.