A mode for Arms Master Optimus designed for underwater combat, "Aqua Screw Mode" was shown in Cybertron Satellite segment of "Explosive Sword Transformation! Wheeljack and Dreadwing". C.L. and Balo are combined into a propeller engine and attached to his right foot, their GR and G redecoes do the same for the left, and B.H. B is attached to his right shoulder to act as a radar system. He wears Arc S's blade on his right arm and wields the Giga Tornado Cannon Combo Weapon.
Released in the latter stages of the Cybertron toyline, this redeco of the Leader-class Optimus Prime figure introduced a new colour scheme that several other tail-end releases would emulate. Taking its name from the Japanese version of Cybertron and with a bio noting that this new body depicts Prime after he embarks on his galaxy-spanning mission at the end of the Cybertron cartoon, "Galaxy Force" Optimus Prime replaces the original toy's blue parts with black and the translucent blue with smokey clear, and moulds several—but not all—grey parts out of red plastic, including the toy's rifles, rail gun covers, missile launchers, and Super Mode leg guns. In the realm of new paint operations, Prime now sports all four Cyber Planet Key symbols on his shoulders, and his unique Matrix-shaped Cyber Key (now with the code lo9x) finally has a gold-painted border, as it had always had in Japan. Additionally, Prime's hip joints were tightened up with this release, making it easier to stand him up in Super Mode.
The Transformers toyline was created from toy molds mostly produced by Japanese company Takara in the toylines Car-Robots (Diaclone) and Micro Change (Microman). Other toy molds from other companies such as Bandai were used as well. In 1984, Hasbro bought the distribution rights to the molds and rebranded them as the Transformers for distribution in North America. They approached Marvel Comics to create a backstory with names and short descriptions for each character, most of which were written by Bob Budiansky.
Another game was released for the Sony PlayStation 2 by Atari; simply titled as Transformers, it was based on The Transformers: Armada. The game's reception was mixed, particularly due to the popularity of a PS2 Transformers game released at the same time for a Japanese-exclusive market, though the Armada game was of a higher quality and featured much better gameplay. The game not released in America was based on the Generation 1 storylines.
Released as part of a collaboration between Transformers and Primitive Skateboarding, this figure is a black repaint of the Titans Return Powermaster Optimus Prime, with the deco somewhat resembling Nucleon Quest Super Convoy, but with some gold trims and Primitive Skateboarding markings partially designed by Primitive Skateboard founder Paul Rodriguez. He also comes with an extra ramp and skateboard accessory that resembles the one Daniel Witwicky used in The Transformers: The Movie, which Shreddicus Maximus (or any other Titan Master) can attach to. The ramp can also form Optimus Prime's gun.
This gold vacuum metallized (save for his black joints, which they were made out of unpaintable plastic) Protoform Optimus Prime figure was featured as a Lucky Draw giveaway (along side similarly gold vac-metal versions of Voyager class Optimus Prime and Protoform Starscream) in the December 2007 issue of TV Magazine. Released in 2008, only 5 pieces were made, making it one of the rarest Lucky Draw figures; the images at right represent the only known photographs of it.