Minor note: Powermaster Prime's animation model as used in the commercials and as a character guide for the Marvel comics is a composite of the second and third designs. The body of the model is actually a straight tracing of the concept lineart for the third version (including its different rifles and twin faux shoulder stacks), with a slightly simplified drawing of the second version's head drawn on top.
The Happy Meal version of Energon Optimus Prime features a very similar transformation sequence to his larger figure, though his limited articulation means that his shoulder insignias aren't visible in robot mode when his arms are facing forward. His torso is hollow to contain his electronic "Energon Cube" accessory, which generates effects when activated by remote control. This remote is in the form of the Mini-Con jet Wreckage, and can mount on the top of his cab in truck form.
Outside the United States, this set was available in a thinner rectangular box. It contained all the original accessories from the American release, but not the DVD. An English-only version of this packaging format was available in Asia and Australia (initially only available at Myer stores, but later also at Toys"R"Us, Kmart and Target, eventually at drastically reduced prices), while a bilingual English/French packaging variant was available in Canada, still including—though not advertised on the packaging—the (English only) comic book.
Released in conjunction with Japanese cellphone maker au, au x Transformers INFOBAR Optimus Prime celebrates 15 years since the 2002 au Design Project that resulted in the INFOBAR cellphone, as well as the 10th anniversary of the live-action films. He transforms into a (non-functional) scaled-down replica of the 2002 au INFOBAR, and in lieu of cellphone functions, the figure can be paired via Bluetooth with a smartphone, such as an iPhone, to act as a notification alarm in either robot or INFOBAR mode. The screen is also non-functional, but pre-printed cards are included which can be slid into the screen to show an Autobot logo, Decepticon logo, a mockup of a cellphone home screen, or a technical "Transformers INFOBAR" design. The figure also includes a display stand.
The second known version  ditched the triplechanging gimmick on the cab and simplified things a good bit. This Powermaster Prime has several distinct characteristics only seen in the second design, such as the wider "block head" and two faux smokestacks on top of either shoulder as opposed to one. Also, in a rather odd twist, this design features a black head and fists for both super and regular modes rather than the traditional blue. It also had yellow eyes in either mode a la the original Optimus Prime.
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.
Available exclusively at Hasbro Toy Shop and their booth at San Diego Comic-Con 2011, this version of Ultimate Optimus Prime is presented in vehicle mode, packaged into a large, foil-embossed bubble packaging (similar to late Alternators packaging) styled after Optimus Prime's trailer, with an additional foil-embossed sleeve styled after the hood of Optimus Prime's truck. Exclusive to this release is a set of stickers one can apply to the trailer. The toy itself is otherwise identical to the regular retail release.
In robot mode, Voyager class Optimus Prime is proportionally more accurate to his CGI design than the leader class toy and has a more accurate headsculpt. However, due to the aforementioned lessened complexity, significant sacrifices had to be made, such as "cheats" to the transformation sequence to achieve this. He is thus less accurate overall than he initially appears. In addition to previously mentioned changes, he carries much of the truck's front hood, grill and fenders on his back like a backpack. Nevertheless, he maintains a superb level of articulation and posability.
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