Sonic.io unblocked is a classic MMO Io game that gathers a lot of players around the world. Take part in that online multiplayer match and conquer the highest position on the leaderboard as soon as possible. Before you dominate the ocean in Sonic.io, you need to survive and collect everything useful. Actually, you must dodge incoming projectiles while roaming around, especially when you pick up rings. They are items that will increase your score for free. You are able to sprint if necessary. Good luck!