Sonic.io is an ocean-themed online multiplayer game. It is free for all players throughout the real world to join an exciting match together. Play against each other and find the best way to reach the top spot on the leaderboard of unblocked Sonic.io! By collecting rings, you can improve your score. Besides, it is essential for you to survive. It is interesting to dodge every attack promptly and cause difficulties to rivals if you run around. Have fun!