Sonic is back to save the world in his biggest adventure yet. The mad scientist Dr. Robotnik has found a way to harness pure evil from the chaos emeralds and destroy the world. Joined by friends new and old; Sonic must keep Dr Robotnik from obtaining all seven emeralds and unleashing Chaos on the world. Sonic makes his debut to the Dreamcast in a full 3D world of visual splendour; providing a thrilling experience. Featuring signature high velocity action stages and adventure fields; Sonic’s adventures are only just beginning!