1 Train to Busan\n\n The zombies in Train to Busan aren't just fast, but they're also difficult to kill. While they can be dismembered, only a headshot will permanently kill these undead.

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.

'The Exorcist' (1973)\n\n Made nearly 50 years ago, "The Exorcist" still holds up and remains one of the scariest movies of all time. It's film that you can't unsee once you've seen it  including Regan's (Linda Blair) 180-degree head turn.