Bloodbath at the House of Death

Bloodbath at the House of Death is a 1984 British comedy horror film directed by Ray Cameron and starring Kenny Everett, Pamela Stephenson and Vincent Price. It is an over-the-top spoof loosely inspired by The Amityville Horror and other horror films of the era, including Alien, The Exorcist and Poltergeist, among others, concerning the investigation by a pair of scientists of a manor house under the control of Satanist monks.

Source: Wikipedia — Bloodbath at the House of Death (CC BY-SA 4.0)