With Sonic.io unblocked, you will feel nostalgic a bit when meeting a Sonic-like character. Sonic.io free unblocked has the same mechanics as the SEGA classic game. You direct your Sonic around a huge map racing against other players to see who will gather the most gold rings. It’s up to you to avoid enemies or destroy them, depending on your strength. But whatever you do, make sure you defend yourself from all dangers and stay alive for a high chance of winning.