Agar.io is a competitive io game. The goal is to keep a cell in a petri dish alive for as long as possible while steadily helping it grow larger. If the cell gets big enough, you can start eating the cells controlled by other players.
Game Controls
Mouse
USE THE MOUSE to move your cell.
LEFT CLICK to speed up.
Keyboard
PRESS W to spit out mass.
PRESS THE SPACEBAR to split your cell into multiple parts.