6. Salo, or the 120 Days of Sodom (1975)
Pier Paolo Pasolini’s Salo is widely regarded as one of the most controversial films in history due to its graphic depictions of sexual violence, abuse, and exploitation.
Based on the Marquis de Sade’s writings, it explores the darkest aspects of human nature, making it a difficult watch for many. Its shocking content led to widespread censorship and bans.