In the Beginning, there was nothing.... And 2 entities only existed in Universe.

Light and Darkness....

With time created by the superior being, the 2 entities then finally took their respective forms. The Light became Primus; and the Darkness became Unicron. Along with them, and with the superior being's power the superior being created the stars, planets, galaxies and other heavenly bodies. And thus, with his final breath of Life, he inherited his powers to Unicron and Primus.

Eons later, the universe was at last complete. With his creations, Primus grew more powerful and more dominant than his brother Unicron.
But Unicron, overcomed by his greed and the hunger for power, he plotted to overthrow his brother but he needed more power to overshadow Primus. And thus he discovered that he can only gain power by destruction and ruin. And so he devoured Primus' creations one-by-one which made Unicron even more stronger, weakening his brother Primus in the process. Primus later discovered that his brother was destroying what he had created; and the titainic clash between the 2 gods has begun.

But Unicron was proved to be more powerful than Primus expected. To stop this physical destruction, Primus shifted the battle to the astral plane, where he fared little better, forcing himself into what seemed to be a sacrifice play - in shifting the battle back to the physical universe without time to properly generate their energy forms, Primus entrapped both himself and Unicron in two barren asteroids. But this was not the end of Unicron - over the eons, he learned to psionically shape his asteroid, and transformed it into a metallic planet, and then again into a gargantuan robot. Primus, fearing that to follow suit by forming himself in a similar manner would simply pick up the conflict where it had left off, sought an alternative way to defend the universe against the threat of Unicron by turning his asteroid into the planet Cybertron.

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Eons Later,The alien race known as the Quintessons used the planet of Cybertron as a factory to produce cybernetic lifeforms. Their early experiments in fusing organic and technological components into single beings results in the creation of the "Trans-Organics," which prove too primitive and unstable. Subsequently, the Quintessons turn to pure robotics for their creations, producing lines of consumer goods and military hardware robots.

After a million years of slavery, the Quintessons' creations, having developed true sentience, come to understand the concepts of oppression and freedom. Led by the robot A3, the consumer goods robots lead a rebellion against the Quintessons, sparking the First Cybertronian War. Despite fierce opposition from the Quintesson-created Dark Guardian robots, A3 is able to use the device he created, the Coda-Remote to shut down the Dark Guardians. Having lost the war, the Quintessons flee Cybertron, scattering through the galaxy.

Following a brief peace after the First Cybertronian War, the military hardware robots, now calling themselves the Decepticons, begin a war with the more peaceful consumer goods robots, now known as the Autobots. Unsuited to combat, the Autobots cannot hope to match the Decepticons' raw strength. Using stealth as their tactic, they reconstruct themselves to have the ability of transformation - reconfiguring their bodies into new, disguised shapes. With this added skill, the Autobots achieve victory in the Second Cybertronian War. An era of tranquility descends on Cybertron, policed by the newly reprogrammed Dark Guardians, now called "Guardian Robots".

Although defeated and living in peace with the Autobots, the Decepticons' ideals of conquest have not been crushed, but merely put on hold. During this time they too develop the ability of transformation. Coupling it with the also newly developed ability of robot flight, the malevolent Decepticon leader Megatron is created.

Within moments of coming into existence, Megatron destroys the current Autobot leader in a strike on one of Iacon's outer cities. He then uses the reprogramming device known as the Robo-Smasher to brainwash the Autobots into his service alongside his like-minded minions.

As word spreads of Megatron's actions, the old Autobot leader, A3 - now called Alpha Trion - dilligently works on a new process to reconstruct Autobots into battle-hardy configurations so that they may stand a chance in the war he knows is now inevitable.

Needing energy supplies, Megatron dupes a naive young Cybertronian dock worker, Orion Pax, into allowing him access to a major energy warehouse. Following a skirmish over the warehouse, Megatron fatally wounds Orion Pax. Little does Megatron realize, however, that Alpha Trion will utilize Orion Pax as the test subject for his new, tactical reconstruction process, thus turning him into Optimus Prime, the Autobot who will eventually lead the Autobots in the Third Cybertronian War.

With Optimus Prime installed as the Autobots' leader, full scale war breaks out, lasting for the next five million years.

After five million years of war, during which many Autobots fled the planet, the Decepticons have nearly taken control of the entire planet. However, the war depleted Cybertron's energy resources to a dangerous low, necessitating a space mission to locate a new planet with new sources of energy that the Transformers could harness.

Optimus Prime leads his best and brightest on Autobot constructed starship, the Ark, pursued by Megatron's forces. Megatron succeeds in boarding the Ark but both it and the Decepticons' starship, the Nemesis, sustain heavy damage, leading them to crash into Earth, where they will remain in stasis for the next four million years.

Following of the eruption of the previously dormant volcano into which the Ark had crashed, the Decepticons are revived by Teletraan 1 and leave the Ark to conquer Earth. However, due to a mistake from Starscream, the Autobots are also revived and thus begins a struggle for the planet's energy resources.