Optimus Prime is the awe-inspiring leader of the Autobot forces. Selfless and endlessly courageous, he is the complete opposite of his mortal enemy Megatron. Originally a mere civilian known as Orion Pax or Optronix, he was chosen by the Matrix of Leadership to command, the first in a number of heavy burdens he has been forced to bear. Another is his bringing of the Transformers' conflict to Earth. Every casualty, human or Cybertronian weighs heavily on his spark. He does not show this side to his soldiers and never succumbs to despair. The Autobots need a decisive, charismatic leader and that is what he gives them. It was that leadership which turned the tide of the Great War.
Knight Armor Turbo Changer Optimus Prime is a Voyager-sized figure that transforms from truck to robot in just 2-steps: pulling his whole truck kibble to the front then fold down to complete the robot mode, although converting him back requires some few steps. His only articulation is the elbows, and he features 5mm compatible hands. He also features a "Knight Armor" gimmick, which consists of his mask popping out to his head with the press of the button on his chest. Take note that you need to flip back the mask manually before you turn him back into Truck Mode.
The first Unicron Trilogy Optimus Prime toy transforms into a longnose truck cab of made-up model. His clear-plastic smokestacks can detach and form a double-barrelled pistol that he can hold in robot mode, and a button on top of his head causes his mouthplate to jiggle up and down as if he were talking (the irony being that while this was a familiar trait of G1 cartoon Optimus Prime, in the Armada animated series, this Prime's mouthplate remained static when he talked). He can also hold a large cannon that is stored within his trailer, and his chest flips down to reveal a (non-removable) Matrix of Leadership. He is packaged with his Mini-Con partner Sparkplug.
If Optimus destroyed the duplicate Cosmos, the real one would inform the Autobots of the Decepticons’ schemes, and the convoy would roll out to take on their adversaries. They were soon met by a squad of flying Decepticons, but were at a strict disadvantage against their adversaries as their vehicle modes possessed no weapons. The Autobots nonetheless managed to fight their way to the Decepticons’ base, one way or another, and defeated the Decepticons by using their own gravity weapon against them. Desert Flight
On a mission with the Triggerbots to stop Megatron from claiming the Underbase, Prime was forced to jettison the massive databank into space to prevent anyone from acquiring its power. With this action, he proved his wisdom and skill to the Autobot Council of Elders. He continued to move up in rank, eventually becoming the field command over the Autobot armies.
In our list of things you didn’t know about Optimus Prime, we learned that the live action version of Optimus was based on actor Liam Neeson. It turns out Michael Bay likes to base his Transformers on real actors, because it’s been revealed that Bumblebee’s character movements are based on Michael J. Fox-- but not just regular old Michael J. Fox; we’re specifically talking about Marty McFly in the Back to the Future movies.

The 1986 line featured another significant change in that many, if not the majority, of the toys were conceived as futuristic vehicles and bore little resemblance to present-day machinery. This was due to changes in the movie and television series, which leaped ahead twenty years to the year 2005. Many have speculated that this change might have been what signaled the beginning of the end for the Transformers, as part of the novelty of the first lines was the realistic vehicles that turned into robots.
This Optimus Prime is a redeco of the figure above, featuring red wheels and various Tech Spec-sque patterns on the legs & chest which can be decoded with their transparent red weapons, which is molded in a sprue similar to the ones used for the Arms Microns kits & Robots in Disguise (2015) Mini-Con figures. He can use any weapons included in this set, although his primary weapon is an axe.
Released to conclude the 10th Anniversary of the live-action film series, Masterpiece Movie Series Optimus Prime is a brand new mold that transforms from a 25cm-tall robot (a little taller than MP10 Convoy) resembling how the character appeared in the first live action movie into a Kenworth W900 modified Peterbilt 379, with many of the engineering cues being distinctively based and improved on the ROTF Leader Class mold. His transformation takes a whooping 43 steps, making it one of the most complex Masterpiece figures to date! (Although this pales in comparison to MP-36 Megatron's 107 steps.) .
In robot mode, like Combat Hero Prime, the bottom of the truck became his familiar windowed chest based upon the original Optimus Prime toy. His main gimmick was light up LED headlights, and a lightpipe in the bottom of his right fist, illuminated by an LED in his right forearm, that would illuminate his clear sword or his double-barreled rifle if they were used in that hand. All three LEDs were activated simultaneously by pressing the sunroof-like depression on the roof of the truck.
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