Terr.io is a great IO game online where you will move around the arena as a tiny cell that is trying to build your size. There are so many generated smaller orbs scattering around. You need to collect them as much as you can, eat them all then get larger. Make sure you keep your cell away from the bigger enemies, or else they will end your life by consuming you. Just like Agar.io, you need to survive longer in order to climb the top rank on the scoreboard. Have fun!
How to play
The mouse is used for controlling your cell. Tap spacebar to divide it, and use key W to throw out your mass