Agar.io. Agario is a free online multiplayer arena and devour other players in hectic multiplayer action.you must give larger objects a wide berth or you will die. Start moving through the grid and try to catch all the tiny blurs of color. Eat and grow, split and multiply and rule the world.
Agar.io is developed by Matheus Valadares, a Brazilian developer, who was only 19 years old when he developed the game!