Splatter film in the context of "Grand Guignol"

Horror is a film genre that seeks to elicit physical or psychological fear in its viewers. Horror films often explore dark subject matter and may deal with transgressive topics or themes. Broad elements of the genre include monsters, apocalyptic events, and religious or folk beliefs.

Horror films have existed since the early 20th century. Early inspirations predating film include folklore; the religious beliefs and superstitions of different cultures; and the Gothic and horror literature of authors such as Edgar Allan Poe, Bram Stoker, and Mary Shelley. From its origins in silent films and German Expressionism, horror became a codified genre only after the release of Dracula (1931). Many sub-genres emerged in subsequent decades, including body horror, comedy horror, erotic horror, slasher films, splatter films, supernatural horror, and psychological horror. The genre has been produced worldwide, varying in content and style between regions. Horror is particularly prominent in the cinema of Japan, Korea, and Thailand, among other countries.

A grindhouse or action house is an American term for a theatre that mainly shows low-budget horror, splatter, and exploitation films for adults. According to historian David Church, this theater type was named after the "grind policy", a film-programming strategy dating back to the early 1920s that continuously showed films at cut-rate ticket prices that typically rose over the course of each day. This exhibition practice was markedly different from the era's more common practice of fewer shows per day and graduated pricing for different seating sections in large urban theatres, which were typically studio-owned.

A slasher film is a subgenre of horror films involving a killer or a group of killers stalking and murdering a group of people, often by use of bladed or sharp tools. Although the term "slasher" may occasionally be used informally as a generic term for any horror film involving murder, film analysts cite an established set of characteristics which set slasher films apart from other horror subgenres, such as monster movies, splatter films, supernatural and psychological horror films.

Critics cite psychological horror films such as Peeping Tom (1960) and Psycho (1960) and the Italian giallo films as early influences. The genre hit its peak between 1978 and 1984 in an era referred to as the "Golden Age" of slasher films. Notable slasher films include Black Christmas (1974), The Texas Chain Saw Massacre (1974), Halloween (1978), Friday the 13th (1980), My Bloody Valentine (1981), Sleepaway Camp (1983), A Nightmare on Elm Street (1984), Child's Play (1988), Candyman (1992), Scream (1996), I Know What You Did Last Summer (1997), Urban Legend (1998) and Terrifier (2016). Many slasher films released decades ago continue to attract cult followings. The slasher canon can be divided into three eras: the classical (1974–1993), the self-referential (1994–2000) and the neoslasher cycle (2000–2013).

In films and television series, psychological horror creates tension through exploiting the shared psychological and emotional vulnerabilities of the human psyche, differing from traditional horrors, where the source of the fear are material threats like grotesque monsters, serial killers, or aliens, as well as the splatter and slasher film genres which derive its frightening effects from gore and graphic violence. In Jungian psychology, this concept aligns with the "shadow" archetype, which encompasses darker, often repressed human traits like dread and paranoia of others, oneself, and the world.