Scary Monsters is essentially a sideways scrolling platform game, with an overhead map section where you travel from one location to another, controlling an actor in a classic B movie Horror flick battling monsters in a haunted house.
The idea is to locate six weapons hidden somewhere on Graves Island, then find the six classic monsters from the silver screen, including Frankenstein, Dracula, the Mummy and the Werewolf and destroy them with the right weapon. Apart from the weapons, you can also say 'Boo!' to the monsters to clear your way, but only inside a mansion and your Boos! are limited in number!