[From the back cover] The aliens are coming! The aliens are coming! The invasion has begun! You play as Cosmi, a comical alien from Planet Mischief who has made his way to Earth to make it his personal training ground. Your mission: Pull pranks and create havoc! Disguise yourself as a "human" to walk freely through the cities of Earth in order to setup practical jokes, create panic and disrupt the lives of these crazy "Earthlings"!