Sonic.io unblocked is a free multiplayer game online that can make you nostalgic a bit, especially if you are a fan of Sonic. Sonic.io free online features the same mechanics and characters as SEGA classic game. You take control of Sonic-like character racing across the map to gather as many gold rings as possible. On your way, you will come across many enemies randomly spawning, and you must elude all of them or if you have any tricks ready, use them to destroy all enemies before they eliminate you. Besides that, you must also dodge all the incoming projectiles, otherwise, you will take damage, which means the game will be over. You have to focus on collecting the rings around the map to grow your score to the top but at the same time, try to defend yourself as well. Let Sonic only keep you engaged for hours and help you upgrade your skills. Have fun!