Welcome to Agar.io! This site offers a free MMO (mass multiplayer online) game where you control a petri dish of cells and your goal is to gain as much mass as possible by swallowing smaller cells without being swallowed by bigger ones!
To get started, I recommend selecting Play as Guest. This gives you an opportunity to get a feel for the game without having to register.
The game controls are very easy! You use your mouse to control your cell’s movement, you can press Space to split into two cells, and pressing W allows you to eject mass.
The game is supported by ads, so you’ll have to watch the occasional ad as you play. I just waited till I could skip it and moved on.
The question now is – how big can you grow your cell? Play today to find out!