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Arc 1: "Siege" Cybertron has been ravaged by the civil war between the Autobots and Decepticons. In an attempt to end the conflict, Megatron considers using the Allspark as a last resort, but Optimus Prime wants to prevent that from happening, even if that means destroying Cybertron in order to save it. Arc 2: "Earthrise" The Transformers leave Cybertron in search for the Allspark, leading the Autobots and Decepticons to land over Earth. Arc 3: "Kingdom" After a freak time travel accident during their voyage home to Cybertron, the Autobots join forces with their descendents, the Maximals, against the Decepticons and their descendents, the Predacons, for the fate of prehistoric Earth and its surprisingly large amount of Energon.

Animated series set in the world of battling Autobots and Decepticons.

Animated series set in the world of battling Autobots and Decepticons.

The autobots and decepticons have obtained peace with one another after the combiner wars. now all of cybertron is in danger from a new/old enemy’s.

It is the year 2005. Twenty-one years after the heroic Autobots and the evil Decepticons resumed their neverending war on planet Earth, the Decepticons have conquered the robots' home planet Cybertron. After a surprise attack by the Decepticons, both factions wage a gruesome battle at Autobot City. In the midst of the battle, Autobot leader Optimus Prime dies during his fight with Decepticon leader Megatron. The Autobot Matrix of Leadership is then passed on to second-in-command Ultra Magnus. Meanwhile, a badly-damaged Megatron is jettisoned by Starscream into deep space, where he encounters the planet-eating robot Unicron and is reborn as Galvatron, the new Decepticon leader. With Galvatron's reign on the rise and Unicron's imminent arrival within Cybertron's orbit, the Autobots must act quickly and protect the Matrix or face total annihilation.