Zoids Saga is a series of Game Boy Advance (and later Nintendo DS) games based on the Zoids franchise, primarily released in Japan. The series encompasses four games and one international adaptation; Zoids Saga, Zoids Saga II (released as Zoids: Legacy in several English-speaking nations), Zoids Saga III: Fuzors, and Zoids Saga DS The games are closely linked to the Zoids anime series. Because of the difference in time between these anime in the Zoids fictional universe, the games rely heavily on time travel.