Agar.io

Developer:
Rating:8.4(161,672 votes)
Released:June 2015
Last Updated:July 2023
Technology:HTML5
Platforms:Browser (desktop-only), App Store(iOSAndroid)

DESCRIPTION

Agar.io is the original .io grow game. Play as a simple agar cell fighting to become the largest cell in a multiplayer game arena. Avoid the bigger cells and consume the smaller ones to grow larger.

This is a simple game about growing your single-cell organism bigger than other players. We love it in our family because there is a surprising amount of strategy and collaboration. You need to pay attention to other players to decide if you are bigger or smaller than them. Taking your time and hiding behind virus cells is a tactic our youngest used a lot. Best of all though, splitting your cell to offer another player a way to grow is commonly seen as a sign to work together. We’ve had long games where we end up hunting in packs with others. It’s a great way to learn cooperation.

Review by FamilyGamingDatabase.

How to Play Agario

The game has 2 simple rules to follow:

  1. You can only consume targets that are smaller than you to evolve
  2. Larger agar will eat you

Slide around the Agario battleground, trying to exist as a single cell looking to evolve. Think like a survivor - don’t just avoid bigger agar, go in for the kill and eat as much as you can!

Pick up all the smaller blobs and eat the other players to grow larger in size. Avoid blobs bigger than you as they will consume you, which means game over! But you can always start the game over and go for your next best record.

Game Modes

There are four game modes in Agar.io. These are:

  • FFA (Free For All) - everyone fights for themselves
  • Battle Royale - Everyone fights for themselves in a shrinking arena
  • Teams - Two teams fight against each other
  • Experimental - Every player for themselves. Donate your mass to the pellets to get more bits in return!

About Agar.io

Launch

Matheus Valadares announced Agar.io on 4chan on 28 April 2015. Matheus, a 19-year-old Brazilian developer, wrote the game in a few days using JavaScript and C++. The game was announced without a name and users had to connect to Valadares' IP address to play.

It was only later that the name "Agar.io" was suggested by an anonymous user on 4chan. Matheus continued adding new features to the game one week later Agar.io entered Steam Greenlight.

Initial reviews

Initially, the feedback on the game's release was mixed. Some praised the game for its simplicity and game mechanics. Fans of the game even described the game as "a good abstraction of the fierce survival-of-the-fittest competition that you sometimes see on the microscopic level." However, there was also some criticism of the simple gameplay. This was mainly targeted towards the repetitiveness and the controls of the mobile version. Tom Christiansen of Gamezebo said the game wasn't able to hold his attention and that overall it was highly repetitive.

The success of the game

Nevertheless, Agar.io quickly became a success, mainly because it was frequently propagated through social media and broadcast on Twitch.tv and YouTube. The mobile version of the game was downloaded more than ten million times during its first week, and in 2015, Agar.io was Google's most-searched video game. In the same year, it was even listed as the fifth top game on YouTube’s list of top games. Fun fact, Agar.io was also featured in the Netflix TV series House of Cards!

More Games Like This

If you like Agario, you should definitely try out our other Krunker, a fast-paced game where you fight against rivals from across the world.

Features

  • Eat smaller cells to become bigger
  • Fast-paced online gameplay
  • Four game modes to enjoy
  • Play with your friends

Release Date

April 2015

Platforms

  • Web browser
  • iOS app
  • Android app

Developer

Agar.io was developed by Matheus Valadares, a Brazilian developer, who was only 19 years old when he developed the game!

Last Updated

Jul 19, 2023

Controls

  • Move mouse = move
  • W = eject mass
  • Space = split

FAQ

How do you split in Agar.io?

Press the spacebar to split the cells.

Can you play Agar.io on mobile?

You can play Agar.io on Android and iOS if you download the official app.

What is the oldest IO game?

Launched on 4chan on 28 April 2015 by Matheus, a 19-year-old Brazilian developer Matheus Valadares, Agario is considered the oldest IO game.

Gameplay Video

Collections

Funny Throat Doctor
Funny Throat Doctor
Bike Mania
Bike Mania
Back To School: Uniforms Edition
Back To School: Uniforms Edition
Penguin Fishing
Penguin Fishing
Build Royale
Build Royale
Super Mario Wonder
Super Mario Wonder
Defeat the virus
Defeat the virus
Mega Dressup – Seasons Best
Mega Dressup – Seasons Best
Valentine’s Makeup Trends
Valentine’s Makeup Trends
Valentine’s Makeup Trends
Valentine’s Makeup Trends
Jump Tarzan
Jump Tarzan
Cartoon Giraffe Puzzle
Cartoon Giraffe Puzzle
Epic Army Defense Rising War
Epic Army Defense Rising War
Grand Commander HD
Grand Commander HD
Glamour Beach Life
Glamour Beach Life
Princess Pup Rescue
Princess Pup Rescue
4×4 Easter
4×4 Easter
Puppy Merge
Puppy Merge
Slap Face
Slap Face
Smallest Dinosaurs Jigsaw
Smallest Dinosaurs Jigsaw
Imposter Expansion Wars
Imposter Expansion Wars
Rocket Clash 3D
Rocket Clash 3D
Flip Bottle
Flip Bottle
Fashion Girl Fitness Plan Game
Fashion Girl Fitness Plan Game
One Pipe
One Pipe
Moto Maniac
Moto Maniac
BTS Cars Coloring
BTS Cars Coloring
Merge Hotel
Merge Hotel
Geometry Dash Subzero
Geometry Dash Subzero
Dinosaur Cards Game
Dinosaur Cards Game
Noob vs Hacker
Noob vs Hacker
Free Rally: Vice
Free Rally: Vice
Summer Aesthetics
Summer Aesthetics
Hieronymus Bosch Puzzle
Hieronymus Bosch Puzzle
CubeCombo
CubeCombo
Love Archer
Love Archer
ATV Ultimate Offroad
ATV Ultimate Offroad
Xmas Wordering
Xmas Wordering
Tricky Kick 3D
Tricky Kick 3D
Planet Miner FRVR
Planet Miner FRVR
Urban Outfits Fashion
Urban Outfits Fashion
Neon Splash
Neon Splash
Shoot the Turtle
Shoot the Turtle
Dead Zone Sniper
Dead Zone Sniper
Bouncy Dunk
Bouncy Dunk
BTS Peppa Pig Coloring
BTS Peppa Pig Coloring
Brat Girl Summer
Brat Girl Summer
Foot star
Foot star
Lost World
Lost World
Punball Puzzle
Punball Puzzle
Car Drive City
Car Drive City
Grab Them All
Grab Them All
Frogman Jump
Frogman Jump
Junon.io
Junon.io
City Takeover
City Takeover
Kart Racing Jigsaw
Kart Racing Jigsaw
Halloween dress up game
Halloween dress up game