Sonic Unleashed will launch players on a revolutionary high-speed adventure through a world torn by chaos. Powered by the all-new "Hedgehog Engine", Sonic Unleashed merges classic Sonic gameplay with the latest in next-generation innovation. It launches players on a journey across the globe and merges blistering 2D action with picturesque 3D environments. With an exciting new storyline where day and night play drastically different roles, Sonic Unleashed will send Sonic on an unforgettable quest to save a dying world from the maniacal Dr. Eggman.