Here Come the Monsters!

From Introduction:

Here Come The Monsters! The Game of Gargantuans is a simple-to-learn, cheesy roleplaying game where players take on the roles of giant rubber monsters in a campy Toho-style movie. It assumes the players and ref already have some rudimentary experience with roleplaying. It is meant to be played in the vein of Godzilla and all of his countless spin-offs, so keep it light (yet stompy), and pass the beer & pretzels.