1. The Exorcist (1973) By the '70s, horror had divided into two camps: on one hand, there were the 'real life' terrors of Psycho and Night of the Living Dead, films that brought horror into the realm of the everyday, making it all the more shocking.

1. The Exorcist (1973) Finally, we have reached the end of our list, with the 1973 Exorcist reigning as Rotten Tomato's all-time scariest film.