Horror films are designed to frighten audiences and explore our deepest fears through disturbing and terrifying scenarios and endings. They feature conventions like isolation, darkness, storms, and murder to generate dread and tension. There are several sub-genres of horror that utilize different styles, enemies, and pacing, such as slashers, zombies, and psychological thrillers. Classic films like Psycho and Night of the Living Dead established conventions for these sub-genres that continue to influence modern horror films.