Four million years ago, Cybertron, shaken from its orbit and drifting through space, became threatened when it floated into the path of an asteroid field. Prime led a group of elite Autobot warriors on the Ark, the Autobot starship, on a mission to destroy the asteroids. Although the mission was successful, during the aftermath of this mission, the Ark was attacked by Decepticons hoping to overpower their weakened foes. Intent on keeping the secrets of the Ark from the Decepticons, Prime set the craft on a suicide course, crashing it into the then prehistoric planet Earth.
Optimus and Prowl received message from Skyfire of a coal transport in Africa, and discovered Megatron was using human slaves. Megatron detonated his coal mines with the world's largest explosion, killing the humans and forging the world's largest diamond — that he would use to as a lens for a satellite to focus the Sun's beams, melting the Rocky Mountains! Prime ordered Skyfire to attack the satellite, and Ratchet to build a square mile panel of metal to deflect the beam, blowing the satellite up. Satellite of Doom The Decepticons attempted to drain the Prudhoe Bay oil reservoir, causing volcanic eruptions and Russia to approach America, accelerating tensions between the countries. Optimus ordered razon gas to be pumped into the reservoir, returning the oil below and raising the Decepticons' aquatic drill. When Continents Collide
Optimus Exprime's electronics are slightly less complex than those of Kenzan and Gekisoumaru. In robot, dragon, and train modes, pressing a button sets off red flashing LEDs and causes him to play one of seven sounds or phrases (which do not change depending on the mode). Pressing and holding the button activates a combination mode similar to the ones found in Kenzan and Gekisoumaru. Optimus Exprime calls on Kenzan and Gekisoumaru to combine with him, and then combination music plays as the LEDs flash blue, purple, and red (with the two halves of his Autobot insignia showing different colors!). Completing either combination by snapping the correct kabuto helmet into place ends the combination mode and triggers another phrase.
In "A Fistful of Energon", Optimus Prime is informed by Ultra Magnus about Starscream's escape from prison. He is quite upset when he has heard that Prowl set out in search for him on his own. He orders Prowl to return, but he disobeyed him. Later, Prowl is bound and abandoned by Lockdown, who wants to get the bounty that Megatron had set on Starscream. But Optimus Prime, together with Bulkhead and Ratchet, succeed in finding and releasing Prowl.
The most controversial line of this period was the Pretenders. Pretenders consisted of a Transformer contained inside an action figure shell who could "pretend" to be either a human or a monster. Complaints with this line were numerous, including the lack of articulation of the figures (the shells could only move their arms), the simple transformation of the robots within, and their increasing lack of resemblance to any sort of modern recognizable vehicle. Still, despite the complaints, the Pretender line continued through all but the final year of Generation One, with variations such as Beast Pretenders, Monster Pretenders, Classic Pretenders, Mega Pretenders and Ultra Pretenders, each with variations on the theme or increasing levels of complexity.
Timelines Rodimus is a BotCon 2008 exclusive recolor of Classic Rodimus in black that is based on Black Rodimus. An evil alternate version of the Generation 1 character, according to the comic writers his personality is based on Vinnie Barbarino from the TV series Welcome Back, Kotter, using variants of Vinnie's famous put-downs. His new appearance has inspiration from the facial hair of parallel universe Mister Spock from the Star Trek episode "Mirror, Mirror".
The main torso-bot is based on Generation 1 Optimus's original body. Two of his limbs are based on Armada Optimus Prime; one "normal" (Inferno helmet), one pre-Earth-body (Knock Out helmet). Another is based on live-action Optimus (Soundwave helmet), and the remaining one (Ironhide helmet)... actually looks to be based on the Optimus-like-but-not-Optimus Micromaster Overload! The heck?
The conclusion to the storyline was forestalled when Hasbro retracted 3H Enterprise's license, but an explanation can be found in issue 8 of the Transformers Collectors Club magazine, Cybertron/Robots in Disguise. In this issue, Prime tells the tale of how Unicron's forces were defeated in the last battle by Optimus Primal's forces and Unicron disappeared into the black hole opened in Transformers: Energon. Combined as Omega Prime, they could not escape fast enough, and were sucked into another dimension.

The U.S. release of Super Fire Convoy had the Japanese voice replaced with an English voice (with the lines, "Optimus Prime, Maximize!" and "Autobots, Transform"), and Autobot insignias were added on the side panels. Much like the Japanese version, Optimus Prime's normal robot mode can combine with Ultra Magnus (sold separately) to form Omega Prime.[48]


Optimus Prime can also combine with Leader-class Jetfire to form Jetpower Optimus Prime by slightly transforming his backpack and feet. Sadly, this takes away from his leg articulation, because otherwise he could never support the massive backpack he has in this mode. However, fans have created alternate configurations that increase leg articulation and movie-accuracy.
This Japanese e-Hobby exclusive is a redeco of Targetmaster Kup, made to represent the character [[Optimus Prime#The Transformers cartoon|Orion Pax]] from the cartoon episode War Dawn. He transforms into a Cybertronic pickup-truck thing. His truck bed has a peg-hole to mount his partner Barrelroller, who also serves as a hand-held weapon. The set also came with a re-deco of Wheelie as Dion.
In the interim year, with the Decepticons defeated, the Autobots entered into an even closer relationship with Earth. The Autobots also began the colonization of other worlds, the first of which was the planet Athenia, where Optimus Prime was stationed. It soon became apparent, however, that the consequences of releasing the energy of the Matrix to cure the Hate Plague were more far-reaching than Optimus had anticipated. Without the energy of the Matrix to act as a balancing factor, Vector Sigma had become destabilized. The Decepticons suddenly returned to exploit this, assaulting Cybertron in order to seize control of the mega-computer. Prime took a squad of troops to aid in the battle on the planet. When the arrival of the Autobot Headmasters tipped the battle in their favor, Prime broke off from the main attack and headed down into the depths of the planet, planning on stabilizing Vector Sigma at any cost.

Though Optimus allowed himself to be destroyed when he betrayed his own moral code while playing a video game, a copy of his mind survived on a floppy disk. Years later, he was restored as a Powermaster, binary bonded to the Nebulan, Hi-Q. Optimus Prime slowly earned the respect of Decepticon leader Scorponok, mourned the loss of his friend Ratchet, and ultimately sacrificed everything to defeat Unicron. Though Optimus died again, his mind persisted in Hi-Q, and the Last Autobot was able to restore him as an Action Master in time to bring a temporary end to the war.

Two custom-made pieces (presented in robot and vehicle mode) by the Hasbro Transformers team as the grand prize for G4TV and Jumpcut's contest for fans to remix selected Transformers clips. Won by TFW2005.com member James Zahn, this one of a kind (well, two of a kind) piece is a almost fully vacuum-metallized Leader class Optimus Prime in red, silver and blue (based heavily upon Generation One Optimus Prime), presented with a custom display base with an embossed silver Autobot insignia and a perspex display case.

TakaraTomy released another reissue based on the Encore version as part of their Chronicle line in 2011, lacking the original Generation 1 trailer. Instead, the Chronicle version was available in a two-pack with Dark of the Moon Deluxe Class Optimus Prime and a new trailer that could be used by both Optimuses, thanks to a retooled trailer hitch on the Generation 1 Optimus Prime figure.
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