Salò, or the 120 Days of Sodom
Four corrupted fascist libertines round up 9 teenage boys and girls and subject them to 120 days of sadistic physical, mental and sexual torture.
Salò is primarily a political/arthouse drama. Its extreme depictions of torture are used to critique power and fascism, not to deliver conventional horror or fear-driven experience. While disturbing, horror is not the film's foundational identity, making its horror centrality moderate.
Best for viewers looking for a very scary, high-tension, psychological, slow-burning and very gory horror movie.
Movies with a similar horror experience.