Sonic the Hedgehog: Spinball
Dr. Eggman (aka Dr. Robotnik) is once again turning the animals of Mobius into robots with his monstrous contraption, the Veg-O-Fortress. Only Sonic can penetrate the Pinball Defense System to free the animals, retrieve the Chaos Emeralds and put an end to Dr. Eggman's diabolical plans!
Story
Sonic the Hedgehog Spinball is one of the few games in the Sonic series that is set in the universe of the animated series Sonic the Hedgehog. The evil scientist Doctor Robotnik has built a fortress on a volcano to turn the animals of the planet Mobius into robot slaves. The volcano's magma powers the fortress and pinball-like defense systems. The volcano is kept in a stable state with Chaos Emeralds. Sonic the Hedgehog and his friend Tails launch an air attack on the fortress. Sonic is pushed into the water surrounding the volcano, but reappears in the caves under the fortress. He infiltrates the defenses, escapes with the Chaos Emeralds and frees the animals. Without the Chaos Emeralds, an eruption begins that destroys the fortress. Sonic destroys Robotnik's escape ship. Tails saves Sonic while Robotnik falls into the volcano, which then sinks into the sea and explodes.