It’s up to Sonic and his pals to save the world from the evil Dr. Eggman, who has returned to once again try his hand at world domination. The evil Doctor’s scheme is to steal the seven Chaos Emeralds and raise the all-powerful Chaos monster to do his bidding. Entangled in the plot of the sinister Dr. Eggman, Sonic must enlist the help of his friends Amy, Tails, Knuckles and Big to foil Eggman’s every move. A second Sonic Adventure DX demo has been released, bigger and better with more playable characters, but still in Japanese (thanks 3DGamers). Read more for download links ...