Cybertron (Earth-1984)

Cybertron is the home planet of the Transformers and the body of their creator Primus.

Origin
After the creation of the universe, two beings named Primus and Unicron fought for the fate of the universe's existance. Primus creates the thriteen original transformers, led by Prima, to battle Unicron. One of the original transformers, however, named Megatronus, betrays them and now serves Unicron, now calling himself the Fallen. Primus went into slumber after his climatic battle against Unicron, allowing the Thirteen to grow into a race on the newly formed Cybertron.