Slitherio online is free to play at school or home. You will enter a new world in which you will help your own snake fight against others to become the longest player. The first thing you need to do in this smash-hit Slitherio is to eat colorful glowing circles to grow longer. While moving, you should pay attention to other snakes. Don’t run into them or you will disappear! Especially, you can boost when you are b enough. Let’s start and enjoy it!