The aliens have invaded the land and captured all the heroes who could defend us. With the modern weapons they have, aliens are dedicated to eradicating all life forms on the planet. At that moment, Luigi and his pet Spaghetti (a worm) decide to free all the heroes.

You take control of Luigi and Spaghetti, who will help you accomplish your mission. First, you will have to crush all the alien eggs by jumping on them. Then, release the hero prisoner. The game is divided into 7 locations: Egypt, the Amazon, Italy, Camelot, United States, Transylvania and finally the Moon. Each place has its own environment and creatures.