The Hasbro release comes with a pack-in file card. In addition to the regular version, Optimus was also released in a special "advance release" assortment alongside Bulkhead, Megatron and Starscream, with each figure including a mini-DVD that contains the Transformers: Prime episode "Masters & Students". Yes, all four of them come with the same episode.
After his attack on Optimus Prime, Megatron was thrown out of the Ark when Blackarachnia activated the ship's defense systems. However, he was not thrown far enough and the Predacon managed to reenter the Ark and blast the Autobot leader, decisively erasing the Maximals from the timeline. A Change to the Agenda This had the effect of producing a wildly different timeline.

Alternity Convoy was simultaneously available in both this silver coloration, and a deco based on his traditional appearance termed "Vibrant Red" (see below). The figure was later redecoed to create "Convoy Super Black" (representing not Optimus Prime, but Universe Nemesis Prime), Alternity Ultra Magnus, and Alternity Dai Atlas. It was retooled into Transformers GT GT-R Prime, GT-R Saber, GT-R Megatron and GT-R Maximus.

If Powerglide did not heed Optimus orders, he indadvertedly caused the water supply to be poisoned anyways. If however, Powerglide listened to Optimus’s orders, the Autobots attempted to lure the Decepticons away from the reservoir and into some nearby woods, where the Autobots would have some cover against the Decepticons. Finding themselves under heavy fire before they could reach the treeline, the Autobots were forced to fight back in the open. With Autobots falling beside him, Optimus gritted his teeth and took careful aim at the poison containers the Decepticons were carrying. After taking out both of the planes carrying the poison, Optimus continued to battle Megatron and his Decepticons until nightfall, until the Autobots were finally victorious.
A retool and repaint, including really shiny chrome, of Revenge of the Fallen Leader class Optimus Prime. In this version, his dark-blue is replaced with a more purplish color and his orange blades have become translucent with some silver. Also, his fuel tanks detach and combine to form his Ion Blaster and his mouth is now visible. Unfourtanetly, all that chrome makes it even harder for him to transform than the last prime. All of these new things make him even more accurate to the movie than his predecessor. Like the picture on the right says, Buster Optimus Prime was rereleased, this time with his mouthplate, in an exclusive set with a redecoed Jetfire.
It was expected that the release of a new movie would involve the production and release of associated toys from Takara and Hasbro. Images surfaced, on-line, of some toy prototypes, notably Starscream and a new Decepticon who was to be named Blackout, along with packaged samples of movie preview "Protoform" Optimus Prime and Starscream toys. Similarly, fans found preliminary artwork of multiple characters, although it was not known at the time how close these were to the final designs. The designs were significantly different from those of the Generation 1 characters with the same names. Reactions varied widely: some fans objected strongly to the designs, occasionally going so far as to threaten a boycott if the designs were not changed to be more traditional, while others liked them. The issue became a divisive one, as detractors accused supporters of lacking respect for the franchise's history, while supporters accused detractors of being "stuck in the past", and not accepting change.
Replacing the weapons of the Hasbro releases, these new Mini-Cons transform into their larger parnter's signature weapons. They came as unassembled, unpainted model kits, similarly using stickers to fill in details. Several Arms Microns also came by themselves in bagged kits, plus there was a metric ton of promotional Microns throughout the line, possibly more than any prior line (even Micron Legend!), and that's not counting the ones that were released during the First Edition series. The Arms Microns also had multiple 5 mm posts and holes, and could be combined into super weapons, plus the larger toys were retooled to have new Arms Micron mounting points.
I you can get an official reissue for around the same price, do it. I lucked out and got an opened but mint Encore for $50 last week but you'll be getting lucky that way. All Hasbro reissues have short smokestacks and long stacks are harder to get separate to swap out. Average price for a Japanese reissue is around $100 opened. If you are on a budget and the kid doens't care about slight issues, the $40 KO would be the better option.
An additional oddity is that unlike every other toy in the Go! toyline, Optimus Exprime came packaged in a box without a window. This is potentially because of the sheer amount of information TakaraTomy wanted to print on the box, or because they were unable to fit him into the box in robot mode with all of his accessories displayed. Whatever the reason, it left him with a smaller box than the other voyagers in the line, a substantially-altered box layout, and a much shorter profile.
The "Unicron Trilogy" version of Optimus Prime is a fictional character of this branch of Transformers lore. Appearing in Transformers: Armada, Transformers: Energon and Transformers: Cybertron (known as the aforementioned trilogy), Optimus is the leader of the heroic Autobots. He often converted to his super combat mode. In all three series, Optimus' English voice actor is Gary Chalk, who previously voiced Optimus Primal in Beast Wars and Beast Machines.
A redeco (or should that be de-deco?) of the Grand Convoy Super Mode Pla-Kit, Grand Convoy Super Mode White Version was available exclusively on July 17th and 18th at the Japanese convention, Kodansha Super Chara Festival 2004 ("K-Fest"). It is a solid white version of the normal model kit, possessing all the features of the normal figure, which was intended to be used in a customization/painting contest held at the convention. It lacks the comic of the normal release.
When Robotmasters G1 Convoy was turned into a Lucky Draw figure, the color scheme into which he was redecoed was chosen through a children's coloring contest held in the pages of the December 2004 issue of TV Magazine. The winning entry was a... startling mixture of blue, orange and two shades of green, earning the toy the fan-appointed nickname of "Crayola Convoy". As with all Lucky Draws, it is extremely rare, with only ten units produced.
Prime would make one further surprise appearance in Dreamwave's Transformers: Armada comic series, although it would not be the Prime of Dreamwave's first series. When the Optimus Prime of the Armada universe disappeared, pulled into another dimension by the power of Unicron, the Chaos-Bringer sent something back in his stead: a nearly dead Optimus Prime from that universe, who warned the transformers of Unicron's coming into their universe before dying.
The 1984 and 1985 toy lines contained several figures of note. Megatron, the Decepticon leader, originally transformed into a realistic Walther P38 pistol with stock and barrel extensions and scope. The Megatron toy was delayed till 1985 for release in the UK. The Constructicons were the first "gestalt" team in the Transformers line, but were different from most subsequent gestalt teams in that they consisted of six members instead of five. The Autobot Jetfire was repainted from a Macross toy, specifically the VF-1 Valkyrie, and the character was renamed Skyfire in the animated television series program for copyright reasons.

"Vibrant Red" Alternity Convoy is a redeco of the "Ultimate Silver" figure in the much more traditional red and blue Prime color scheme, representing the Optimus Prime of universal stream Primax 109.0 Beta. The figure was available simultaneously with the Ultimate Silver version, sharing the same packaging and pack-in materials, save for the color of the illustration on the front of the box, and a sticker that identified the figure within.
Realizing that the planet is dying, Optimus orders a mass evacuation of all Autobot cities, but many transport ships are destroyed by the Decepticon satellite Trypticon, under orders from Megatron that no one shall leave the planet. He orders the Aerialbots Jetfire, Silverbolt and Air Raid to fly and destroy Trypticon. The aerial trio manages to destroy Trypticon's jet pack and send the Decepticon behemoth crashing into Cybertron, where Optimus Prime and the Autobots band together to narrowly defeat him, sending him plunging into a pool of raw energon. Optimus and the remaining Autobots volunteer to stay and defend Cybertron from Megatron for as long as possible while the rest evacuate the planet. He commissions a massive vessel known as the Ark to transport the remaining Autobots into space when the time comes.
Released as part of TakaraTomy's Welcome to Transformers 2010 campaign, the "Sons of Cybertron" set includes a redeco of the 2006 Classics "Ultimate Battle" pack Deluxe class Optimus Prime, cast mostly in translucent plastic (his shoulders remain opaque Polyoxymethylene (POM)). He comes packaged with a similarly translucent redeco of Classics Rodimus.
Two of his limbs are based on Armada Optimus Prime; one "normal" (Inferno helmet), one pre-Earth-body (Knock Out helmet). The main torso-bot is based on Generation 1 Optimus's original body. Another limb-bot 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?
Offered as part of a Lucky Draw campaign in August 2004, this extremely rare version of Masterpiece Convoy is almost entirely vacuum-metalized gold, lacking any other painted detail or stickers. The parts which are not viable are molded in a flat golden plastic; the only exceptions are its rubber tires, the core of the Matrix and the energon-axe, which remain black, blue and orange, respectively. Whether or not the figure was intended to evoke Optimus Prime's entirely-golden appearance in the cartoon episode "The Golden Lagoon", when he was coated with electrum, is unknown; given that entirely chroming a figure gold is a fairly standard deco for Lucky Draw figures, it may just be happy coincidence more than anything else.
In one reality, while the Autobots were boarding the Ark, Optimus voiced his lack of confidence in his leadership, before welcoming aboard Geosensus, who was incapable of transforming to robot mode. Four million years later, Prime and Prowl found the Ark was under attack and defended it with deadly force. In examining the wreckage of the attackers, they realised that the robot Optimus had destroyed was not a Decepticon but Geosensus, who had forced himself to transform in an attempt to fight off the Decepticons. Though Prime was willing to take the rap, Prowl insisted on covering up the mistake to protect Optimus's image as a leader. Parts
This agenda led the Predacon Megatron to attack the comatose Optimus Prime in stasis on prehistoric Earth, forcing Primal to take Prime's Spark into his body in order to preserve his life while his body underwent repairs. Primal was subsequently mutated into the massive "Optimal Optimus" form, which shared elements of Prime's form, prior to returning the Spark to its rightful place. The Maximals were occupied throughout the remainder of the series protecting Prime and the other Transformers aboard the crashed Ark until the Predacons were defeated. Various monuments to Optimus Prime appeared on Cybertron in Beast Machines, one of them a holographic statue in Iacon that Megatron took control of in order to trick Primal.

Available exclusively at Toys "R" Us, Rodimus transforms into a futuristic car that is a homage to the vehicle mode of Generation 1 Hot Rod. A panel on the car's hood, which is also the figure's chest, can be flipped to either show an engine block or the figure's Autobot insignia. The figure comes with an Energy Bow, capable of firing two missiles. His bow can also be tabbed to the roof of his car mode or snapped on his hand. The tabs that secure his bow in vehicle mode are 5mm wide, making it usable by other figures as well. His legs are normally bent for the underside of his car mode but can be locked straight during transformation.

Optimus Prime is primarily voiced by Peter Cullen in most of his incarnations, who voiced him in the original series. Following the production of the 2007 film, Cullen reprised his role for the sequels and supporting media and would even voice Optimus in later series such as Transformers: Prime. Optimus has been voiced by a number of other voice actors in other series such as Neil Kaplan, Garry Chalk, and David Kaye in the series Transformers: Robots in Disguise, Unicron Trilogy, and Transformers Animated, respectively.

Certainly the most iconic, and most common, leader of the Autobots is Optimus Prime. But the thing about Optimus Prime is that he dies... a lot. And every time he dies, someone has to take his place-- until he’s invariably resurrected in one way or another, that is. In many storylines, including the original animated Transformers: The Movie, it’s Hot Rod who takes over as Rodimus Prime.

Like the original Warrior Class Optimus Prime, the figure features an undocumented feature: His axe can be stored on his vehicle mode trailer. Additional features include storing the axe onto either of his leg hooks, combining the launcher with either of the swords at their hilt, and storing the launcher underneath the vehicle. In a neat bit of engineering, he can fully transform with his swords attached.
The third United Optimus Prime toy is a redeco and slight retool of the Deluxe Class figure from Hasbro's 2010 Transformers toyline, itself an homage to Prime's Generation 2 "Laser" form. The toy features translucent blue plastic as opposed to Hasbro's orange, red paint is used on the biceps instead of blue paint, extra red paint applications on the knees like the original's sticker detail, and more broken-up red apps on the shoulders. Silver detailing was added to the cab mode on the grill, the bumper, and near the doors. The blue plastic in cab mode is now black plastic to make the figure more accurate to the Generation 2 original. The gray plastic is changed from the Hasbro version to more closely match the 2006 reissue of Laser Optimus Prime. Black paint was applied to the cab mode to mimic the fade from red to black on the original Laser Optimus, but still includes a flame deco like the Hasbro version, only in a different design. It lacks the roof-mounted rubsign of the Hasbro version, instead including Autobot insignias on the cab doors. (Disappointingly, they are Generation 1 insignias, rather than Generation 2 ones!) Additionally, a retool was made to the peg on the inside of his right shoulder, to make it shorter and wider than the Hasbro version, allowing it to move freely without hitting the torso, unlike the Hasbro release.
In late 1993, Hasbro relaunched the Transformers franchise with the Generation 2 line, with production again largely being done by Takara. The subgroups concept was done away with for the first year, but there were no new molds or characters. Generation 2 re-used the molds for many of the characters from the 1984 and 1985 line, but with mostly different color schemes and finishes, as well as different weapons and accessories. Megatron's figure was released later on. As noted previously, Megatron's original alternate mode, or "transformation identity", was a handgun with attachments, but in Generation Two, this was changed to a tank due to safety and security concerns. Most of the 1994 figures were re-releases or recolors of European G1 releases. 
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