Earth-64, or more accurately, Universe 64 is the universe where The Gammaean War takes place.
The universe is a universe with sixty four planets which five are inhabited with humans. One planet, known as Gammea, inhabited by Gammeans, has one individual with ultra-devastating powers known as Gamma.
All record of the history have been destroyed except the following.
- 2064 - Ben Tennyson, stuck in hybrid form between Celestialsapien and human dies fighting Gamma.
- All Omnitrix Aliens Species
- The Sixty Fourth Earth or known as just Earth