Optimus Prime finds his home planet, Cybertron, now a dead planet, in which he comes to find he was responsible for killing. He finds a way to bring the planet back to life, but in order to do so, he needs to find an artifact, which is on Earth.
Sequels:
Transformers (2007)
Transformers: Revenge of The Fallen (2009)
Transformers: Dark of the Moon (2011)
Transformers: Age of Extinction (2014)
Sequels:
Transformers (2007)
Transformers: Revenge of The Fallen (2009)
Transformers: Dark of the Moon (2011)
Transformers: Age of Extinction (2014)