Following the adventure from "Sonic & Knuckles", the Death Egg has finally been destroyed and the Master Emerald has been returned to Angel Island. This humiliating defeat only serves to further Eggman's rage, and he has determined once and for all to rid himself of Sonic. Eggman revisits - and improves - the very best of his creations to defeat our spiked hero. But is there something further to his plan?

And so a new adventure begins...