When the Deadly Six threaten to destroy his world, Sonic's new moves and power-ups are the only way to defeat them before it's too late! In his latest plot to defeat Sonic and rule the world, Dr. Eggman has harnessed the power of six menacing creatures known as the Deadly Six. However, when the Deadly Six rise up against their new master, Sonic must unite with his arch nemesis Eggman and explore the mystical Lost Hex in order to take them on head-to-head. Use Sonic's amazing new moves and incredible Color Powers to speed across a variety of unique terrains, racing inside, outside and upside down in every level. Features: The first handheld Sonic game ever to feature fully realized 3D levels. Unleash Color Powers exclusive to the 3DS version. Exclusive Special Stages! Tilt using the Motion Sensor to navigate hair-raising levels and obtain the elusive Chaos Emeralds. Create and customize radio controlled gadgets to help Sonic. Race against friends locally through ad-hoc and online through network play. PLUS: Share your gadgets between the Wii U and Nintendo 3DS versions.