When Dr. Eggman holds the president and his daughter hostage, Sonic must comply with the evil scientist’s demand to travel to Eggmanland. There, he is tasked with stopping Black Eggman and deactivating the city’s generator before it reaches critical mass. Unbeknownst to Sonic, the mission is a trap designed to activate Hyper‑Metal Sonic, a robotic counterpart built by Eggman to destroy the hero.