Cybertron

Cybertron
Films	Transformers The Universal Studios Movie (mentioned)
Games	The Universal Studios Video Game
Rides	Transformers: The Ride 3D (mentioned)
Background Information
Location	Galaxy
Ruler	Optimus Prime
Inhabitants	Bumblebee, Jazz, Ironhide, Ratchet, Sideswipe, Wheelie
Visitors	Megatron, Barricade, Starscream, Brawl, Bonecrusher, Blackout, Sideways, Ravage, Grindor, Devastator

Cybertron was the former home planet of the Cybertronians (Autobots and the Decepticons) because of the the Decepticons starting the Great War. It's also the planet form of Primus.