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Are you ready to rumble with all of these big and totally bad cells? If so, then float into the petri dish within Agar.io. It's an addictive and massively multiplayer online action game!

You’ll be going up against other gamers from all across the planet. How long can you last while each and every one of them attempts to gobble up your cell? You’ll need to consume little bits of agar in order to grow bigger and stronger in this multiplayer game.

If you play it safe and avoid the larger cells, eventually yours will be able to start fighting back and controlling other smaller cells before you begin your own feeding frenzy! You can even customize your cell with a cool logo or creative design that will strike fear into the hearts of your opponents...or just make them LOL!

How to Play Agar.io?

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


  • USE THE MOUSE to move your cell.
  • LEFT CLICK to speed up.


  • PRESS W to spit out mass.
  • PRESS THE SPACEBAR to split your cell into multiple parts.

Similar Games

Here’s some more awesome action games you should try next!

  1. Slither.io
  2. Paper.io 2
  3. Worms.Zone
  4. Wormate.io
  5. Hole.io

Who Developed Agar.io?

Agar.io was created by the game designer Matheus Valadares.

Can I Play Agar.io on Mobile?

Yes, Agar.io is available to play on your favorite mobile devices via Google Play and the Apple App Store.

Need help? watch our Walkthrough for this game.

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