In the beginning a single omnipotent being travelled the galaxy discovering life, but with nothing equalling itself, it began conversing with itself. Two distinct and morally opposite psyches form. Primus a reassuring presence that accepts the universe as it is. Unicron a malevolent presence that seeks to correct the flaws he perceives. In time the increasingly divergent personalities arguing lead to the being fracturing into two. Unicron's rapacious and destructive nature forced the withdrawn Primus to act, they struggled for eons at a complete stalemate.

To try and turn to the tide of battle Primus created the Thirteen Primes; Prima, Vector Prime, Alpha Trion, Solus Prime, Micronus Prime, Alchemist Prime, Nexus Prime, Onyx Prime, Amalgamous Prime, Liege Maximo, Megatronus, and Optimus Prime. They train, strategize, and create weapons to combat Unicron. They eventually defeat Unicron and ultimately created the Earth. Though victorious all of them had been tainted with a touch of darkness.
For a time there was peace, they focused on building & construction. Tensions grew between them, culminating in war starting with the murder of Solus Prime by Megatronus who was manipulated by Liege Maximo. At the end of the war, Megatronus (now know as The Fallen) & Liege Maximo leave the Primes for good. Nexus Prime seperates himself into five sentient beings and they scatter. Vector Prime once idealistic had fallen into despair and seals himself inside a pocket dimension. Onyx Prime, Micronus Prime, & Optimus Prime sacrificed their lives by entering the Well of All Sparks to jump-start its creative processes creating the Cybertronian race. Alpha Trio & Alchemist Prime remained to nurture the Cybertronians. Quintus Prime, travels into deep space to create new races to ally with the Cybertronians in the future. Time passes the Thirteen pass into legend and are forgotten.
[hider=The Age of Evolution]The Well of All Sparks births Orion Pax, who is in fact Optimus Prime the thirteenth member of the Thirteen, reborn in a humbler shape, unaware of his origins or true heritage. He took a job working in the Hall of Records almost immediately. He was forced to take shelter underground in stasis lock, due to a red giant star passing by that caused meteor strikes & solar flares, not to mention interfering with Cybertron's sun.

After they ascended to the surface small settlements and villages were formed to create safe havens from the marauding warlords and their barbarian armies. Orion Pax took up residence in Iacon.

Orion was there when the Quintessons arrived and was one of the first to gain the ability to transform. Eventually the Cybertronians rebelled against the Quintessons, Orion had no part in the rebellion continuing to work in the Hall of Records the whole time. He eventually suppressed the traumatic memories of the Quintessons.

Orion didn't have any significant history during this time.

Orion would read & index information in the Hall of Records from the Communication Grid, he was forbidden analyze it. It was Jazz's job to analyze the information Orion indexed, leading to them developing a friendship eventually a brotherly relationship. As part of his job Orion monitored Megatron's transmissions this led to Orion and Megatron secretly conversing due their shared beliefs. They had friendly but intense debates over the nature of free will and their ideals dangerousness. Under Megatron's suggestion he began training under Jazz learning to wield an Ion Cannon and form swords from his arms. He eventually met with Megatron in person. After Megatron made his first public announcement on the Grid to denounce the Decepticons terrorist bombings Orion also made a speech of his own. Orion trusted his friend believing that if he was responsible he would want to be associated with the attacks.
During a meeting with the High Council, Megatron, and himself Orion rigorously defended their ideals, even reviving the ancient philosophical phrase "Autobots" to describe the autonomy his brethren sought. Orion was appointed to become the next Prime known as Optimus Prime by Councilor Halogen. Megatron accused Optimus Prime of treachery and murdered Halogen. Optimus prevented the Elite Guard from attacking Megatron.

Fort Scyk was the site of the first engagement in the war, Optimus forgoed participating in order to recruit more Autobots. During the Siege of Hydrax Plateau Optimus killed his first Cybertronian, he confessed to Alpha Trion that the act of killing made him feel like he was on the wrong side. The Autobots loss every battle until the Battle for Kalis, they had to win in order to maintain power in Iacon. Eventually the war became nothing more than the Siege of Iacon which lasted for millions of cycles. Optimus elected to eject the Allspark into space. Optimus eventually rescued Sentinel Zeta Prime from Kaon Prison, but Sentinel died from his injuries. After Sentinel's funeral Optimus officially became the next Prime. He journeyed to the Core of Cybertron which had been poisoned by Megatron with Dark Energon. Optimus was informed by the Core that he was too late and that the Autobots would have to leave while Cybertron healed itself and bestowed him with the Matrix of Leadership. He was given the prophecy that he would lead the Autobot back to Cybertron and would lead the Autobots in an "age of unimagined wonders".

As Optimus and his crew fled Cybertron aboard the Ark, Megatron pursued him. Megatron aboard the Nemesis using his and Orion's old frequency called to threaten that he would hound him through the stars and finally kill him for the Matrix. He explained they were still brothers, as they were bonded for life despite their enmity. The Nemesis & Ark fight as they approach the last Space Bridge, when the Space Bridge detonated they found themselves crash landing on a nothing dustball. The crash landing forced them into stasis lock.

Optimus wakes up on Earth.