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.
After passing the Matrix to Ultra Magnus and expiring in the aftermath of the battle of Autobot City, Optimus Prime found himself in Maccadam's Old Oil House. There he encountered Optimus Primal and another Optimus Prime from a different universe. Together, the four of them overcame the other Optimus Prime's doubts about his leadership, before returning to their respective time lines. Prime Spark
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.
For Transformers: Age of Extinction, Optimus Prime initially transforms into a rusty 1973 Marmon semi cab-over truck and later on a new alternate mode in a blue and red Western Star 5700 Custom semi-truck.[31][32] After humanity turns on all Transformers, regardless of faction, Optimus and the other Autobots go into hiding. Eventually, they find themselves being hunted by a rogue organization called Cemetery Wind. Optimus is severely injured in a trap set by the group, while many of the other Autobots, including Ratchet and Leadfoot, are slain. An inventor, Cade Yeager, comes to Prime's aid and helps restore his health. After uniting with a small band of Autobots, Optimus faces Lockdown, a ruthless bounty hunter allied with the humans, and KSI, an organization that produces man-made Transformers. Optimus is captured by Lockdown, but the Autobots rescue him. Optimus is quickly losing faith in humanity, but at the urging of Cade, chooses to stay and fight a resurrected Megatron and his new army. Prime awakens the ancient Dinobots, and rides a newly tamed Grimlock into battle through Hong Kong. He kills Lockdown and Harold Attinger at the film's climax as revenge for killing many of his friends, including Ratchet and Leadfoot. At the end of the film, he leaves Earth and flies off into deep space, seeking to find out the truth about his mysterious Creators.[33][34]

A Japanese TV Magazine exclusive, this release of the Super-Con class Prime toy has almost all of his parts cast in translucent coloured plastics—hence the 'crystal' moniker—representing the character's disembodied spark after his destruction in the Armada cartoon episode "Crisis" and resurrection in "Miracle". What that means for poor Over-Run (or "Surge" in Japan), also cast in translucent plastic, we couldn't say! Available via mail-order, only 5000 pieces were distributed in October of 2003.
Thanks to fellow Seibertron user, Sabrblade, we have discovered some new in-hand pictures of the forthcoming Transformers Studio Series #38 Voyager Class Transformers Bumblebee Optimus Prime figure! These come couresty of YouTuber TonTon Reviews, presumably as a preview of his next review. For comparison, they have put this new entry into the Studio Series with MP-10 and Takara Tomy's Movie Advanced series "Classics Optimus Prime" (Evasion Mode Optimus Prime). This gives us a good - Read More
This version of Leader-class Optimus Prime features a new lower face sculpt that lacks a faceplate, as well as the replacement of his fuel tank/exhaust assemblies with new, transforming versions that can combine into his ion blaster/barrage cannon. To the simultaneous pleasure and displeasure of people who had already purchased the first release of Leader-class Revenge of the Fallen Optimus Prime, Buster Optimus Prime features an extensive paint job that closely matches Prime's appearance on the big screen, including covering almost all of his grey plastic with silver paint or chrome, expanding and outlining all of the flame tampographs white for greater accuracy to ILM's computer model, and generally painting in small details, nooks and crannies that were neglected on the first release due to cost-cutting reasons. The red and blue plastic colors also vary from the original release, to better match his film appearance.
The Premium Series Optimus Prime is both a retool and a redeco of the Leader Class Optimus Prime toy. The major selling point is a more movie-accurate head sculpt with longer ears and detailing based on the final CG head design, and a flip-out energy sword to replace the ion blaster that was included with previous versions of the toy. This energy sword is detachable and attaches where the Ion Blaster did, compatible with non-premium Optimus Prime Leader-class-based releases. Because his ears are much longer, the truck roof panel that hides his head now has two holes cut into so the head can fit inside the cabin.

(translated from the Japanese Wikipedia article) The Transformers: Kiss Players was a Japan-only line of Transformers toys, manga, and audio dramas released in 2006. Kiss Players is set in an alternate Transformers universe where the Transformers are powered by the kisses of young girls. The toys themselves come packaged with small, scale figurines of the girls who power them. The toyline was openly admitted to be aimed at a specific part of the market — adults, rather than children. The comic that accompanied the Kiss Players was an unashamed reflection of this, with several images which were considered by some to be very sexually themed.
This release of Buster Optimus Prime was susceptible to a paint scraping issue on the silver painted slide-out barrel of his blaster. This problem was fixed for the DOTM Re-release by relocating the silver paint app from the barrel to the inside wall of an exposed gas tank that had been previously left as unpainted grey plastic. The black paint app on the barrel was left unchanged.

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 an almost fully vacuum-metallized Leader-class Optimus Prime in red, silver and blue (based heavily upon Generation 1 Optimus Prime), presented with a custom display base with an embossed silver Autobot insignia and a perspex display case.
This highly accurate model kit of Optimus Prime is a Japanese exclusive. It is extremely possible, and comes with his two swords that can be mounted either on his fore-arm, or the hand can be removed and it placed in the wrist via ball joint. His appearance is based on his Dark of the Moon look, as it his "Abbs". The head can be made either with the face-plate on or the face-plate of which reveals a detailed face. Interestingly though, he doesn't come with any of the guns he uses in the films, though it is thought he can hold Buster Prime's gun.
Nonetheless, I remain a big fan of Lego and although I think they have somewhat moved away from their roots with the excess of licensed products (and the earlier licensed products were, in my opinion, not very good because they contained too many specialized non-generic pieces that weren’t useful for generic building. But that situation is improved and in particular we have found the Star Wars sets to be of most value for generic building, because they generally have very few really specialized pieces (although to be fair the sets are most useful for building other spaceships, etc).
Released to commemorate the 10th anniversary of Revenge of the Fallen, this Studio Series Optimus Prime is a retool of the figure above, featuring many new parts, namely a new backpack, chest piece, and a pair of non-transforming fenders/legs, to better resemble his appearance in the first two movies. These new parts allow him to combine with Studio Series Jetfire to form "Jetwing Optimus Prime." His color scheme features a much higher contrast than the previous release. Instead of Energon Swords, he now comes with an ion blaster like that used in the battle of Mission City. He also comes with a cardboard backdrop display depicting the highway fight with Bonecrusher from the first Transformers film.

After their own Optimus Prime disappeared, Scavenger and Smokescreen discovered an alternate version of Optimus Prime lying unconscious and barely alive in Autobase Earth. Though Red Alert did what he could, the mysterious Prime reactivated only long enough to utter a cryptic statement about the walls crumbling and the coming of chaos, then died. Worlds Collide, Part 1 of 4

If Optimus ordered his troops to come to the humans’ aid, they found themselves taking part in a struggle in futility, as the entire town was near-weightless, meaning they couldn’t put the humans anywhere where they wouldn’t float away once more. Then, the Autobots heard Decepticons approaching. Helpless in their current position, the Autobots were quickly eradicated by the Decepticons. 
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