.io Games

With our complete list of unblocked .io games you can lock horns and battle other players in real-time. Our list includes classic io games like Slither.io and Agar.io along with newer titles such as Betrayal.io, Shell Shockers and Krunker.

Table of Contents

  1. A brief history of .io games
  2. Our .io games
  3. Fortnite-inspired .io games
  4. Notable games in the .io category

A brief history of .io games

The very first .io game was Agar.io. It was created in 2015 by Matheus Valadares, a Brazilian software developer, and released on the internet forum 4chan. It became an overnight sensation, amassing millions of players. The game features cells which grow by eating agar or other players, and which can be split. Agar.io was acquired by Miniclip a few months after its original release.

Agar.io's success inspired other developers to build similar browser-based real-time multiplayer games. Steven Howse, a developer from Michigan, USA, released Slither.io in March 2016. In that game, players return to the world of classic Snake in an improved, multiplayer-enabled version. Players run around the arena eating cool glowing orbs to grow their snakes. All it takes to die is one collision with another player (or yourself). The game reached its peak in July 2016, earning, in that period, an income of over $100,000 dollar per day (according to the Wall Street Journal).

Diep.io was released in April 2016 by Matheus Valadares. The game features various tanks which can be leveled up by destroying other players. The game was received generally positively (albeit not as positively as Agar.io) and proceeded to be a hit.

These 3 games inspired new developers to create many more .io games, e.g. Bonk.io, Wormax.io, Wormate.io, Paper.io 2, Brutes.io, Spinz.io, and so forth. They became too numerous to remember, which is why we collected them here on CrazyGames!

Even years after the creation of the initial .io games, developers are still bringing out new games in the same genre. Some of the .io games fizzle quickly, but some build a lasting player base. Examples of such long-lived .io games are Shell Shockers, Krunker and Zombs Royale.

Our .io games

Show your skills by beating people's high scores and rise to the top of the leaderboards in games like Agar.io and Slither.io. These browser-based multiplayer games feature unique gameplay and endless real-time competition. We update the list weekly to make sure you can always play the most recent .io games. All of these games are unblocked so you can play them anywhere. You can play many of the io games with friends, and some contain a chat functionality that lets you talk to other players.

Properties of .io games

.IO games come in all shapes and colors, but they do have some shared properties:

  • Players grow by eating or otherwise killing other players. By growing, they rise on the leaderboard.
  • The game takes place in an arena. This arena can be either fixed-size or shrinking (in Battle Royale style games).
  • Almost all games use HTML5 technology to run in any modern browser.
  • The games are fiercely competitive and feature real-time multiplayer gameplay.

Fortnite-inspired .io games

The Fortnite / PUBG inspired io games are also a lot of fun. In this genre, our 2 most popular games are Surviv.io and the amazing Zombs Royale. Fight until you're the last player surviving in an ever-shrinking arena! Whether you're a fan of strategy, retro, shooters or platform games, you'll have plenty to choose from. So go back to a simpler time and take the fight to others while you're at it!

Other notable .io games

It's impossible to discuss all our .io games (that's why we have the handy list), but here are some notable games.

Krunker.io is a first-person shooter .io game initially released in May 2018. It has 3D graphics and pixel graphics similar to those in Minecraft.

Shell Shockers is another first-person shooter .io game, but this time you take control of an egg. The game is developed by Egg and Dairy Ministry of Belarus. Your goal is to kill other players (which are also eggs!) using a variety of weapons.

Little Big Snake takes the snake-based gameplay championed by Slither to another level. It is made by Russian-based Neodinamika and features a lovable, bug eating, snake-eating cuddly little BIG snakes. Many other Slither-inspired games have risen in popularity, including Wormate and Worms Zone.

Get ready to control a black hole in Hole.io. Absorb anything that comes close to you, including other players. Time is limited, so be quick!

Conquer territory in Paper.io 2 by circling areas. Play with friends, or with people from around the world in this real-time multiplayer game!

Betrayal.io is a fantastic .io game created by End Game that is inspired by Among Us. In the game, you play as either an adventurer or a betrayer and you need to respectively complete and sabotage tasks.


What are the most popular .io Games?

  1. Shell Shockers
  2. Betrayal.io
  3. Slither.io
  4. Smash Karts
  5. Krunker
  6. Stabfish.io
  7. Zombs Royale (ZombsRoyale.io)
  8. MiniGiants.io
  9. EvoWars.io
  10. Voxiom.io

What are the best .io Games to play on mobile phones and tablets?

  1. Shell Shockers
  2. Betrayal.io
  3. Slither.io
  4. Smash Karts
  5. Krunker

What are .io Games?

Io games are a series of real-time multiplayer games of which the name ends in the domain extension "io". The .io top-level domain (ccTLD) is originally the country code from the British Indian Ocean Territory, but was popularized for games by some of the initial hits in the .io genre. The .io games' appeal lies in their casual nature that involves real-time multiplayer battles between players in an arena. Players earn points by killing other players. The top players are listed on the leaderboard. The original .IO games are Agar.io and Slither.io.

We collected 651 of the best free online .io games. These games include browser games for both your computer and mobile devices, as well as apps for your Android and iOS phones and tablets. They include new .io games such as Sea Guys (.io) and top .io games such as Shell Shockers, Betrayal.io, and Slither.io.
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