Agar.io is a popular addictive game that has simple rules to play. If you don't know the rules, you can easily learn them and start playing now. You start the game with a small blob and grow it while eating balls. When you are big enough, you can eat less. Note that you will also be a target for larger blobs, as they can eat you. The more you grow, the slower you move. So you have to split your blob into two parts to move quickly and give some to the bigger blobs.
