The 10 Best Horror Movies Rated NC-17 or X, Ranked by Collider

"The NC-17 rating, known as 'X' before being replaced in 1990, is the most controversial rating in MPAA history. Receiving it often indicated that the film's content was too intense, provocative, or appalling for general audiences to handle, resulting in the movie being almost destined to fail at the box office. It's never often the intent for filmmakers to make their movies with this rating in mind, but sometimes it's unavoidable and can occasionally work in their favor. There truly are some incredible NC-17/X-rated movies out there. While the rating is given to many films across multiple genres, it often appears more in horror. In fact, many iconic NC-17 horror movies have been released throughout the years that blew audiences away with their shocking and disturbing content. Despite the ratings working against them, they continue to be praised by viewers and still are today. Here are ten of the NC-17-rated horror movies, ranked." - collider.com