Some are much more subtle and don't parody horror, such as An American Werewolf In London. Another style of comedy horror can also rely on over the top violence and gore such as in Dead Alive (1992), Evil Dead (1981), The Toxic Avenger (1984), and Club Dread - such films are sometimes known as splatstick, a portmanteau of the words splatter and slapstick. It would be reasonable to put Ghostbusters in this category.