Sonic the Hedgehog is heading out on an adventure like never before. Powered by an all-new engine, Sonic Unleashed combines classic Sonic thrills with the latest in next-generation technologies. Dr. Eggman has unleashed a slumbering beast from the center of the world, causing a seismic tremor that splinters the world into seven continents. Even more shockingly, this event causes a hair-raising change in Sonic himself, altering him with phenomenal new powers and abilities that come out when the sun sets. Help Sonic race to save the world and himself as he deals with his amazing transformations.Highly detailed 3D environments combine with furious 2D action in Sonic Unleashed. The compelling story finds Sonic maintaining his high-speed skills throughout the day, but at night he becomes a mysterious, dark form with never-before-seen powers. From 3D-action brawling to amazing agility, the heroic hedgehog will have a host of new tricks in his arsenal. Explore up to nine areas that resemble such real-life locations as the Great Wall of China, Arctic Pole glaciers and much more. Next-gen capabilities, including global illumination, grid computing, continuous data streaming and an intricate path finding system, treat you to Sonic gameplay that will excite you every step of the way.