What Are the Scariest Movies of All Time?

'Alien' (1979) 1 of 16

With the tagline "In space no one can hear you scream," Ridley Scott imagined the modern monster horror film. A spaceship's crew awakes in deep space when their Mother computer picks up a distress signal on a nearby planet. In the emptiness of space, the crew descends to a desolate world and discovers a vast colony of pods right before they meet one of the most iconic, gruesome, and blood curdling monsters in movie history and the phrase "face-hugger" becomes embedded in horror movie lore.