Horror films is series of films originating from the horror genre that are designed to elicit fright, fear, terror, or horror from viewers. In horror film plots, evil forces, events, or characters, sometimes of supernatural origin, intrude into the everyday world and usually include a central villain. Early horror films often drew inspiration from characters and stories from classic literature, such as Dracula, Frankenstein, The Mummy, The Wolf Man, The Phantom of the Opera and Dr. Jekyll and Mr. Hyde. Later horror films, in contrast, often drew inspiration from the insecurities of life after World War II, giving rise to the three distinct, but related, sub-genres: the horror-of-personality film, the horror-of-Armageddon film, and the horror-of-the-demonic film. The last sub-genre may be seen as a modernized transition from the earliest horror films, expanding on their emphasis on supernatural agents that bring horror to the world.

Horror films have been criticized for their graphic violence and dismissed as low budget B-movies and exploitation films. Nonetheless, all the major studios and many respected directors, including Alfred Hitchcock and Stanley Kubrick, have made forays into the genre. Serious critics have analyzed horror films through the prisms of genre theory and the auteur theory. Some horror films incorporate elements of other genres such as science fiction, fantasy, mockumentary, black comedy, and thrillers. Some horror films are made in B-movie, made by minor film company. Some (not few) horror films are in public domain (e.g. The Little Shop of Horrors, Night of the Living Dead, The Terror, Suspiria, Embryo)http://www.desertislandfilms.com/drivein.html