Battle Unit Zeoth - In-Box - GameBoyBattle Unit Zeoth takes place in the future where mankind is invaded by a race of alien robots known as the Grein. The Earths forces were triumphant in battle and the Grein forces fled the Solar System. However, as they retreated, the Grein left behind a secret underground base filled with self replicating Grein machines. Forty two years after the Earths victory, the Grein base opened and a new attack force decimated the city of New Age. To retaliate,