Agario Game Unblocked
If you are looking for popular unblocked io games, you should try agario. It is an addicting game and also simple to play. Eat and grow your blob. Escape from bigger ones not to be eaten. Besides, you should notice the green blobs as they are viruses. If your blob is bigger than a virus, it will be split into many pieces once it touches. However, you can hide your blob in a virus if its size is smaller. According to your strategy, you can feed a virus to attack bigger blobs and explode them. Have a nice play!