22. Man Behind the Sun (1988)
Director: Mou Tun-fei
Man Behind the Sun made history back in 1988, when it became the first movie to ever receive China's equivalent to an NC-17 rating (rating: III). Mou Tun-fei's intention was to make an anti-war film that would educate people to the heinous crimes committed by Japan's Unit 731 on its prisoners during World War II, but the censors deemed Man Behind the Sun more of an heartless exploitation flick than an informative tool.
Prisoners, of both Chinese and Soviet descent, are hung up on crosses, run over by trucks, and shot in cold blood, and Tun-fei never pulls his camera way from any of the gruesome atrocities. Battlefield veterans might not appreciate its graphic nature, but we're sure as hell convinced that WWII was hell on Earth.