Cybertron (Unicron Trilogy)

Cybertron is the home planet of the Transformers in the three television series, ', ' and "".

Origins

The presence of a sentient energy core named "Primus" at the heart of Cybertron in the "Armada/Energon" universe suggests its history is some variation of the Primus/Unicron legend. An American-written trading card suggests a story similar to that of the Dreamwave universe - Primus and Unicron are twin heralds, but Unicron turns on Primus and fells him, casting his body into the orbit of a nearby star. The card does not state that Primus became Cybertron, but it can be assumed with some degree of certainty.

History

At some undefined point in Cybertron's ancient past, it was attacked by Unicron, who was fended off by the planet's guardian, Omega Supreme. Omega and four other guardians subsequently entered stasis below the planet's surface, guarding a reservoir of "Super Energon" for its use in the future. Few other facts from this Cybertron's history are available - it is not clear when the Autobots and Decepticon began warring relative to this event.

Transformers: Armada

Long ago, Cybertron was peaceful, until the evil Decepticons waged war against the Autobots. Both sides fought for control of the planet, each ruling one half.

Eventually, a mysterious, unclarified "cataclysm" struck the planet, following which the small race of robots known as the Mini-Cons emerged. It would later be discovered that the Mini-Cons were creations of Unicron - currently orbiting Cybertron in a weakened state, disguised as a moon - who had implanted his cells within Cybertron, where they grew and hatched into the Mini-Cons; presumably, then, the cataclysm was caused by Unicron's implantation of his cells. The larger Transformers on Cybertron soon discovered that the Mini-Cons possessed power-enhancing abilities, and began to war over the small robots (it is unclear if the Autobots and Decepticons were already at war, or if it was the emergence of the Mini-Cons which began the conflict).

Through a complication bout of time-travel, however, the Mini-Cons had the seeds of souls and sentience planted within them at the moment of their creation by a group of time-displaced human children, and as they came to think and feel for themselves, they sought to fulfill their own destiny, by going to Earth to find the humans. The Autobots agreed to aid the Mini-Cons, preferring that they be free and not subject to anyone's will, but the Decepticons still sought to control them, and attacked the launch of the Mini-Con ship, which was crippled as it escaped through a portal, causing it to crash-land on Earth, where the Mini-Cons remained dormant for a million years until they were awakened by the very humans they had come to find. The signal released by their awakening brought the Transformers on Cybertron to Earth in pursuit of them.

Some time into the conflict on Earth, several Autobots and Decepticons followed Optimus Prime and Megatron's teams to Earth, where the battles eventually culminated in Megatron attaining possession of the three Mini-Cons weapons. Returning to Cybertron, he used the weapons to cut a swathe of destruction across the planet, quickly establishing control over the vast majority of it. However, the sudden escalation in the Autobot/Decepticon war caused by the Mini-Cons' reawakening had resulted in a vast increase of the hatred and "negative energy" that powered Unicron, who soon shed his moon disguise and attacked the planet in his re-energized gargantuan robot form. Cybertron took heavy damage from the planet-eater, but by rescuing the Mini-Con weapons from within his body, the Transformers were able to briefly halt his rampage - until Megatron (now Galvatron) challenged Optimus Prime to a final duel, the ferocity of which began to awaken Unicron once again. In the end, Galvatron sacrificed himself to break the circle of hate, leaving the Decepticons allied with the Autobots, working together to restore their shattered world.

Transformers: Energon

As part of the rebuilding program, the Autobot-Decepticon alliance entered into a partnership with Earth's governments to mine Earth and the Sol system for the energy-rich mineral known as Energon. Over the next ten years, Cybertron was steadily restored as "Cybertron Cities" were built in strategic positions on Earth, its moon and Mars to gather Energon and keep the planet rich and healthy.

Following Megatron's resurrection through the power of Energon, he began a quest to restore Unicron to life, under his control, which eventually led him to move the planet-eater's body through a spacebridge into the vicinity of Cybertron itself. After a series of attacks on the planet, during which Primus's chamber was penetrated by Terrorcons, a reaction between the negatively-charged Energon within Unicron's body, and the positive Energon used by the Autobots caused a rupture in space, leading to a new sector of the universe where the planets consumed by Unicron had been recreated. A series of battles followed which eventually resulted in Unicron's restoration and destruction, save for his consciousness, which continued to exist within Megatron.

Guided by Unicron, Megatron gathered the remnants of his army and attacked Cybertron once more, using the destruction as a cover for his true motive - to acquire the power of the Super Energon, which transformed into Galvatron. With the aid of Sixshot, the Decepticons were then able to seize control of Cybertron's computer systems, enshrouding the surface of the planet in a poisonous Energon gas that kept the Autobots at a distance while the Energon Towers were used to propel Cybertron through the spatial rift, into the new region of space. It's motion slowed by a giant-sized, Primus-empowered Optimus Supreme, Cybertron was liberated from the Decepticons when Galvatron turned his attention away from it, using the Super-Energon to grow to colossal size himself and departing the world, heading out to find Unicron's spark, drifting in space.

When Galvatron was subsequently possessed by Unicron's spark, Primus used the Super Energon to create a foundling sun, into which Galvatron plunged himself, preferring to perish than to allow himself to be controlled. But, while appearing to be the end of Unicron's threat, in truth, it was the beginning of a much greater danger...

Transformers: Cybertron

Primus's plan to contain Unicron's spark within the Energon sun was doomed to failure - close to a decade later, the sun collapsed in on itself, turning into a gigantic black hole which threatened not merely Cybertron, the fabric of reality and the multiverse itself, causing ripples throughout space and time that disrupted history, causing inconsistencies between the "Cybertron" animated series and its predecessors. Many Transformers were forced to depart for Earth while the Autobots search for the Cyber Planet Keys to save their world. Over time, it would turn out Cybertron was a dormant Primus. After the destruction of the black hole, Primus turned back into Cybertron with cities, atmosphere for humans, roads and wildlife.