The adventure takes place on the secret Northstar Islands in this new edition of the classic 2D Sonic action platformer.

Play as Sonic, Tails, Knuckles, and Amy Rose and use the new Emerald powers to move and attack in dynamic new ways.

Explore beautiful, unknown environments on your own or with up to 3 other players. You will experience new classic sensations.

Stop Dr. Eggman, Fang, and a mysterious new rival before it's too late.

• A new version of a classic: fast 2D side-scrolling action. You've never played classic Sonic like this!
• Play with your favorite characters: choose from Sonic, Tails, Knuckles, and Amy Rose and utilize their unique abilities to traverse the Northstar Islands.
• Hurry to defeat Dr. Eggman, who has allied with an old enemy, Fang.
• Harness the power of the Chaos Emeralds: Multiply, swim up waterfalls, change forms, and more with the powers of the Chaos Emeralds.
• More friends, more fun: For the first time in a Sonic game, play the entire campaign with up to 3 other players with 4-player local co-op.