Sealed Brand New New Thrills Classic Feels 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 Army 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!