Sonic Adventure

Doctor Robotnik seeks a new way to defeat his longtime nemesis Sonic and conquer the world. During his research he learns about an entity called Chaos, a creature that helped to protect the Chao and the all-powerful Master Emerald thousands of years ago. When a tribe of echidnas sought to steal the power of the Emeralds, breaking the harmony they had with the Chao, Chaos retaliated by using the Emeralds' power to transform into a monstrous beast, Perfect Chaos, and wipe them out. Before it could...