The cab transforms into the robot mode of Optimus Prime himself, with the addition of a pair of removable blue fists that plug into his headlights. The fists themselves do not store anywhere in vehicle mode, but can fit easily in Prime's opening chest compartment (originally designed to accommodate two Diaclone driver figures). Prime is armed with a black laser rifle that, due to design, he cannot hold straight.
Later, Optimus pursued Megatron to Earth to stop him from pillaging the planet's energy resources. Prime's loyal team of Autobots clashed with Megatron's Predacons on many occasions, stopping their schemes with the aid of Koji, a human whose father had been abducted by the Predacons. Prime and Koji went on to form a strong friendship, although Prime blamed himself for Koji's father's abduction. Optimus proved his bravery on many occasions, battling and defeating Sky-Byte in an underwater duel and personally rescuing Side Burn from a Predacon trap. Later, when Megatron targeted a tanker truck to scan as the alternate mode of the final protoform, Optimus Prime leapt into action in order to save the truck's human driver and, as a result, the tanker, Prime and the human were all scanned. With an infusion of Megatron's spark energy to complete the concoction, Scourge was born, emerging from his pod as a dark twin of Optimus Prime. Prime's pleas to make Scourge remember his original Autobot loyalties fell on deaf ears.
I don't have a really good pic and I probably have something more rare in a box somewhere that I can't remember but this is my fav 'rare' Transformer: https://s3.amazonaws.com/tf.images/reduced-image_4474_106.jpg Sorry I don't have a real pic, I am packing up to move but here is a stock pic of TF Prime FE Japanese Convention Exclusive Optimus Prime.
The third version  would quite possibly have been the most gimmick loaded Transformer in the history of the line, simultaneously being a Powermaster, Headmaster, and Triple Changer. The Headmaster also would have been a Triple Changer, turning into a sort of armored four-wheeled rover (Roller II?) and robot as well as a rather silly looking Optimus Prime head with four vertically aligned wheels jutting off the sides. It seems that when the extra Headmaster gimmick was scrapped, the super mode head remained separate rather than being reintegrated into the trailer hitch such as on the earliest design. Notably, the body of this design is extremely close to the final design.
1. Color diversity: Back in the 80s, most sets were comprised of a few basic colors; red, blue, yellow, white, gray, and black. It was much easier to acquire a “critical mass” of pieces in each color to start building one’s own creations in coherent color schemes. Space, Town, Castle sets all had the same basic colors. Today Lego uses a much wider array of colors in their sets. While this adds a lot of variety and visual appeal to today’s sets, this means that one has to buy a much larger number of sets (or scour bricklink) to get achieve a workable critical mass of pieces in each color. After buying some of the modern sets, I end up with a few dark-blue or lime-green pieces that I don’t really have enough to much with other than use as accent colors. They end up in my misc color bin in the event I decide to build the set they originally came with or sell them off on bricklink.
The toy itself is a mix of different versions. The cab has the safety modifications, including the shortened smokestacks and longer missiles (and thicker rifle), but also has the modified hitch of the 2011 Chronicle DOTM two pack. Meanwhile, the trailer is the lighter grey version from the 2008 Universe release. This version also seems to suffer from mold deterioration.
A Toys R Us-exclusive item, this Titanium two-pack features the previously released War Within Optimus Prime and the upcoming War Within Megatron figures. Also included is an exclusive variant cover War Within comic book. Missing, however, is the unique base that comes with all single-pack 6-inch Titaniums (including the original release of War Within Optimus). The Megatron figure is also lacking its base, this despite bases for both figures being depicted on the instruction sheet.
Inspired by the 1985 promotional version of Optimus Prime that featured Pepsi stickers on his trailer, this outlandish incarnation of Prime is a slightly altered version of Takara's 2005 Pepsi Convoy figure (which represented a different character to Prime). The figure was only sold by Hasbro Toy Shop at various conventions, and given away as a promotional prize by Pepsi, via their Mountain Dew brand.
In the animated series, Optimus Prime was originally in the Autobot Academy and friends with Sentinel Prime and Elita One. When Elita is lost on a planet dominated by giant spider-like aliens, he blames himself for leaving her behind, where she supposedly dies in the explosion of a wrecked Decepticon warship loaded with Energon. Sentinel doesn't forgive him for losing her and Optimus takes full responsibly for Elita's demise. This caused Optimus Prime to wash out of the Autobot Academy. However, Ultra Magnus pulls some strings so that Optimus Prime could be captain of a strange Space Bridge repair crew composed of a war vet named Ratchet, a fledgling cadet named Bumblebee, and his fellow cadet Bulkhead. Optimus is given command of the starship which is the vehicle mode of Omega Supreme.
Hot Rod was then summoned to Earth by Optimus Prime, as revealed in The Transformers: Escalation. With typical bravado Hot Rod and Hardhead insisted on heading to assist Prime's unit in stopping Megatron. Hot Rod left Hardhead to assist the other Autobots while he captured the Decepticon facsimile. Unfortunately, he almost collided with Prowl, who had had the same idea. Despite some bickering between the two, they were able to eventually capture the facsimile, forcing the Russian troops to back down. When Hot Rod heard the battle between the Ore-13 powered Megatron and the rest of Prime's troops, Prowl forbade him from interfering, entrusting him with the safe return of the facsimile. Calling Nightbeat for transport out, he was jumped and severely damaged by Skywarp and Thundercracker. Nightbeat teleported him away, but Hot Rod had been badly damaged, and the facsimile reportedly killed.
Ultra Magnus is a redeco of the Diaclone "Powered Convoy" figure, itself a redeco and slight retool of "Battle Convoy", the toy that became the original Optimus Prime figure, sporting a new trailer. One of the last few Diaclone toys to be released in the Transformers toyline, Magnus was recolored from the original toy's dark blue, red and black color scheme into a more patriotic red, white and blue, though his chestplate, which was rendered white in his package art followed a more the blue color scheme of his shoulders. He transforms into a Freightliner COE, towing a car-carrier trailer capable of transporting up to four normal-sized Autobot cars. As with Optimus Prime, his cab transforms into a small robot, which can then combine with the trailer to form a "super robot", although all original Generation 1 fiction prior to the 21st century ignored this and simply rendered the super robot as Magnus's default robot form. To facilitate this combination, Magnus sports a slightly longer front axle than Prime, thereby creating tabs on either side of the cab that slide into grooves in the trailer to help lock the small robot into place. He is armed with a rifle sporting two handles that allow either of his robot modes to hold it, and two shoulder-mounted missile launchers, whose spring-loaded firing mechanism was removed for the Hasbro release of the figure.
Optimus Prime is the fictional protagonist of the Transformers: Robots in Disguise (Fire Convoy in the original Japanese version) branch of the Transformers universe. Based on the character of the same name, Prime once again leads the Autobots against the Decepticons. His voice actor, Neil Kaplan, does his voice in a style reminiscent of that of Peter Cullen, the voice of the original Optimus Prime. Wired Magazine nominated Fire Convoy as one 12 most ridiculous Transformers ideas of all time.
When Sideswipe was accused and convicted of destroying the Nova Suspension Bridge, Optimus was infuriated that one of his own Autobots could commit such a heinous act. Optimus was tasked to hunt down and deactivate Sideswipe, though the task proved to be easy as Sideswipe did not run, hide or resist. After Optimus had deactivated Sideswipe, he was approached by Prowl, who pointed out that Sideswipe's actions made little sense, as he had committed the crime in broad daylight before many witnesses. Agreeing that the Decepticons might be behind the situation, Optimus allowed Prowl to take a team of Autobots to Carob Island to clear Sideswipe's name while Optimus and Jazz stayed behind to continue working on human/Autobot relations. Prowl returned with evidence that it was indeed a Decepticon-controlled clone of Sideswipe that had committed the crime. Optimus then presumably reactivated Sideswipe when his name was cleared. Deadly Paradise