This document discusses the horror genre and its conventions. It defines genre as a method of categorizing films based on similarities in narrative elements. Sub-genres are identifiable subclasses within a genre that have distinctive subject matter and styles. Hybrid genres combine elements of two or more classic genres. The document provides examples of horror sub-genres and their defining conventions, as well as generic conventions expected in horror films regardless of sub-genre, such as isolated settings and indestructible monsters. It also examines why audiences and producers are drawn to genre films and how genres evolve over time.