"Take on the role of your beloved characters: Select from Sonic, Tails, Knuckles, and Amy Rose, each with their unique abilities, and embark on a thrilling adventure across the Northstar Islands as they race to thwart Dr. Eggman's plans, now joined by an old foe, Fang. Harness the extraordinary might of the Chaos Emeralds: Utilize the Chaos Emeralds to perform feats like duplication, scaling waterfalls, transformation, and more. More companions, more excitement: In a Sonic first, enjoy the entire campaign alongside up to three other players in a seamless 4-Player Local Co-op mode, allowing for drop-in and drop-out multiplayer action. A fresh take on a classic: Rediscover the cherished 2D Sonic high-speed side-scrolling action platforming you hold dear, reimagined with fully realized 3D graphics, fresh powers and abilities, a brand-new environment, and innovative gameplay mechanics! Experience classic Sonic in a way like never before."