"The volcano headquarters of the Autobots on Earth was destroyed in a Decepticon attack. Now, in the year 2006, Autobot City has become the new Autobot base. Autobot City is also a Transformer, known as Metroplex, with the capacity to transform from city mode to a battle station, or to a giant robot. Metroplex is the Autobots' last line of defense, the robot they depend upon when all other options fail. When Metroplex transforms to a robot, some of his modular components from smaller, separate robots: Six-Gun, the ideal defensive battle scout, Slammer, the tank, and Scamper, the tough little car that berths in Metroplex's city ramp. To counter the power of Metroplex on Earth, the Decepticons have built Decepticon city, known as Trypticon. The city can transform to battle station mode, becoming a mobile menace with X-ray lasers and twin photon cannons. Trypticon also has a dinosaur mode, an immense walking reptilian form that crushes anything in its path. Metroplex and Trypticon are each other's deadliest enemies. Whenever they approach one another, they lock in battle and engage in incredible combat, and the victor and their epic struggles may someday turn the tide of battle in favor of either the Decepticons or the Autobots. Which will it be?"