Adventure through the mystical Northstar Islands in this all-new take on classic 2D Sonic high-speed action platforming. 

• A new Spin on a Classic: You've never played classic Sonic like this before!
• Multiply, swim up waterfalls, change form, and more with the powers of the Chaos Emeralds.
• Play as Sonic, Tails, Knuckles, and Amy Rose, using their unique abilities to explore and uncover new paths and secrets. 
• More friends, more fun: Play with up to 3 other players in local co-op and challenge players from around the world in battle mode!