Like the Mega Drive, the third installment has the graphics totally renewed as you play Sonic or (at last) Tails, as you attempt to foil Eggman's plans. Robotnik has gone on another 'take over the world' bender, and has created a new fortress, the Electric Egg Zone. Capturing all of the little animals again (he just doesn't know when to quit, does he?), its your job to get to Eggman's base and destroy his ways. Always making the plot different from the last two games, you yet again have to collect the Chaos Emeralds, as Robotnik can't seem to be bothered to get them himself. So collect the emeralds, destroy Eggman's robots and slap the fat boy about a bit. The harder levels don't make it easy though...