Embark on a grand adventure with your companions!Experience exhilarating high-speed action!The mysterious "North Star Islands," home to giant creatures, serve as the stage for Sonic and his companions Tails, Amy, and Knuckles' new adventure. Harness the new power of "Emerald Power" to take on Dr. Eggman and Fang, who are seeking to capture these giant creatures to achieve their ambitions!Moreover, this is the first game in the series that allows offline 4-player co-op and online competitive play. Enjoy the game with friends and family besides adventuring alone!- Sonic is back with a new evolution!Retaining the 2D side-scrolling gameplay of Sonic, with its graphics evolved to 3D, this game will feel both nostalgic and fresh, an evolution of high-speed side-scrolling action games!- Play as your favorite character!Besides Sonic and Tails, you can also play as Knuckles and Amy! Utilize their unique abilities like flight, wall climbing, and more as you dash across the North Star Islands!- Reach new heights with new powers!Use the new "Emerald Power" to unleash a variety of actions like creating duplicates and scaling waterfalls. Enjoy a new Sonic experience with this newfound power!- Fun for everyone!Besides adventuring alone, you can explore all the stages with up to four friends. The excitement and fun multiply fourfold when playing with four people!- Battle players worldwide!Engage in competitive play for the first time in the series, with up to 4 players offline and up to 8 players online. Win the minigames and strive for victory!* A bundle containing this item is also available for purchase. Please be careful to avoid duplicate purchases.