Optimus Prime and the Autobots face the greatest danger in all eternity, a menace that threatens not only the survival of the Transformers, but the very existence of Cybertron, the home of their race, and the universe itself. A giant black hole that is poised to devour all of existence unless the mysterious Cyber Planet Keys can be found and used to unlock the full power of the Transformers god Primus. A power the Decepticons want for themselves.
Cybertron, or Galaxy Force as it is called in Japan, follows Energon as the final installment in the so-called Unicron Trilogy. And while the series itself has its weak spots, the toy line is top notch.