Welcome to the weirdest slumber party ever in the cult classic Monster Party for the NES. As a young boy named Mark, you are whisked away to a bizarre alien world by a gargoyle-like creature named Bert. In this strange and surreal action-platformer, you must help Bert clean up his monster-infested planet. Wielding a baseball bat, you'll battle a host of bizarre enemies inspired by classic horror tropes. With the press of a button, you can even transform into Bert for a limited time to fly and shoot powerful projectiles.