Our .io games

Get ready to battle players around the world in real-time with our complete list of the most popular .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!

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, Zombs.io, Paper.io 2, Brutes.io, Spinz.io, and so forth. They became too much to remember, which is why we collected them here on CrazyGames!

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.
• The game takes place in an arena.
• Most 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.

Bonk.io is a Flash .io game developed by Chaz which takes place in hundreds of different maps that can be customized by players.

Little Big Snake takes the snake-based gameplay championed by Slither to another level. It is made by Russian-based Neodinamika and features “lovable, bug eating, snake-eating cuddly little BIG snakes”.

Get ready to control a black hole in Hole.io, a recent addition to the .io games category that is a lot of fun. 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!