One unfortunate day, the evil genius Dr. Ivo Robotnik decided to build his evil empire with the might of an army of robots. The Doctor goes to South Island to find six Chaos Emeralds and use them to build the ultimate weapon – the Death Egg, a space station that would become the capital of the evil empire. Once on the island, Robotnik used his army of robots to capture animals who live on the island and put them inside the robots, charging his machines with the energy of the animals.
Soon, the supersonic hero, Sonic the Hedgehog, arrives on the island and begins rescuing the animals by destroying the robots and searching for the Chaos Emeralds. After numerous battles, adventures and hardships, after finally collecting all six Chaos Emeralds, Sonic meets Dr. Robotnik in battle in the center of the villain’s main base, the Final Zone. Robotnik employs a gruesome trap, attempting to crush Sonic with specially placed pods called Egg Crusher. With no margin for error, Sonic defeats the villain and finally drives him away from South Island.