7. The Exorcist (1973)Photo: bleedingcool.com
William Friedkin’s The Exorcist remains perhaps the seminal “true” horror film of all time. In this instance, “true” means that it doesn’t include another genre like “Alien” does with science fiction. “The Exorcist” is another slow burn horror movie about a little girl possessed with the devil. That slow buildup is more than worth it during the climactic exorcism sequence that sees a team of priests try to rid young Reagan of her demons once and for all.