Prime's homecoming was not all he had hoped for, for Shockwave had taken control of the planet. Prime and the other transformers were forced to go underground, waging a guerrilla war against the Decepticons. Around this time, Cobra would attempt to steal Teletran-3, but their attempt to teleport directly into the chamber would set off a catastrophic malfunction, one that threatened to crack open time itself. Optimus Prime and the Stunticons were amongst those who found themselves sent back in time. Optimus was reformatted into a 1920s semi-truck and was eventually rescued by Roadblock, Beach Head and the Baroness, who helped him capture the Stunticons.
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.
This Optimus Prime is a minor redeco of the One-Step Changer figure, omitting the paint apps on the knees, the flames on his shoulders, and changing the robot mode chest's deco. Along with his wavemate Bumblebee, Optimus Prime loses his pin on his leg, which is used to activate Stomp & Chomp Grimlock's pop-out weapons and gimmicks. As with the first wave of the Turbo Changers, Optimus features a nearly invisible tampograph on his vehicle front, which can be revealed with Mega Turbo Changer Dragonstorm's UV-powered Cyberfire gimmick.
The conclusion to the storyline was forestalled when Hasbro retracted 3H Enterprise's license, but an explanation can be found in issue 8 of the Transformers Collectors Club magazine, Cybertron/Robots in Disguise. In this issue, Prime tells the tale of how Unicron's forces were defeated in the last battle by Optimus Primal's forces and Unicron disappeared into the black hole opened in Transformers: Energon. Combined as Omega Prime, they could not escape fast enough, and were sucked into another dimension.