Sonic is truly in a world-wide race against time... as the sun sets, a new adventure awakens. In this new adventure, Dr. Eggman is up to his evil antics again, in his quest for World domination. He unleashes a powerful ray that not only divides the world into several continents, but has an unexpected transformation on Sonic's state.
Sonic must travel across the globe, completing action-packed stages to retrieve the power of the Chaos Emeralds to ultimately save the world... and himself! Sonic's world has been transformed, courtesy of a powerful new game engine that delivers the tight gameplay of a 2D sidescroller in stunning, picturesque 3D environments. Sonic Unleashed takes everything you know and love about Sonic and upgrades it with spectacular scenery, new combat powers, an unexpected storyline, and, of course, blistering speed.