In Sonic the Hedgehog's most recent fast-paced adventure, worlds are colliding. Discover the secrets hidden within the ruins of a long-gone civilization that was overrun by robotic hordes. Sonic gets stuck on an old island full of strange creatures while looking for the missing Chaos emeralds. Take on legions of formidable foes while you delve into an incredible realm of suspense, exploration, and danger. Reach new heights and feel the exhilaration of open-zone platforming freedom at high speeds as you race across the five enormous Starfall Islands. Take on an adventure, use the Ancients' power, and battle these new, enigmatic enemies. Welcome to the Sonic game's evolution.