This document discusses the genre of horror films. It begins by defining horror films as aiming to create a sense of fear through portrayals of audiences' worst nightmares and the arrival of evil forces. It notes that horror films often include mythical creatures and violence. The document then profiles some iconic horror film characters and elements commonly found in horror films. It concludes by outlining several sub-genres of horror films, including slasher, splatter, psychological horror, and those featuring monsters, zombies, vampires, and Japanese horror.