Adventure Through The Mystical Northstar Islands In This All-New Take On Classic 2D Sonic High-Speed Action Platforming. Play As Sonic, Tails, Knuckles, And Amy Rose And Harness All-New Emerald Powers To Move And Attack In Dynamic New Ways. Navigate Gorgeous, Never-Before-Seen Environments Solo Or With Up To 3 Other Players And Stop Dr. Eggman, Fang, And A Mysterious New Adversary From Converting The Islands' Giant Animals Into Badniks Before It'S Too Late!A New Spin On A Classic: The 2D Sonic High-Speed Side Scrolling Action Platforming You Know And Love, Reimagined With Fully 3D Graphics, New Powers And Abilities, An All-New Setting, And New Ways To Play! You'Ve Never Played Classic Sonic Like This Before! Play As Your Favourite Characters: Choose From Sonic, Tails, Knuckles, And Amy Rose And Take Advantage Of Their Unique Abilities To Blaze A Path Across The Northstar Islands As They Race To Defeat Dr. Eggman, Who Has Teamed Up With An Old Nemesis, Fang. Harness The Power Of The Chaos Emeralds: Multiply, Swim Up Waterfalls, Change Form, And More With The Powers Of The Chaos Emeralds. More Friends, More Fun: For The First Time Ever In A Sonic Game, Play Through The Entire Campaign With Up To 3 Other Players With Drop-In And Drop-Out 4-Player Local Co-Op.