Lock horns and battle other players in all the latest .io games. Enjoy original titles like Slither.io and new .io games such as Betrayal.io, Shell Shockers, Krunker, and Smash Karts. You can sort this IO games list by newest, most played, and top .io games using the filter.
The Rise of IO Games
The first .io game was Agar.io. It was developed by Matheus Valadares in 2015 and gained significant popularity through the internet forum 4chan. The game revolves around cells that grow by eating agar and consuming other players. A few months after its release, the game was acquired by Miniclip, and a new game genre started to emerge based around the humble .io domain extension.
The games that followed were focused on the growth mechanics that made Agar so popular, strengthening the idea of .io as a genre, not just a domain extension. Slither.io was one of those games, with the same simple yet addictive concept but with snakes. There are now grow games like Little Big Snake taking this concept further, with level and skill systems adding huge replay value.
How to Play .IO Games
Many .io games are still based on growing your character by consuming food and slaying other players. Reach the top of the leaderboard by doing this repeatedly until you're the biggest! Most IO games feature:
- A large online multiplayer arena with a competitive leaderboard.
- Simple mechanics that make gameplay possible for anyone.
- Players that consume food, and often other players, to grow bigger.
- Mostly a ‘survival of the fittest’ free-for-all, sometimes with cooperative gameplay.
Newest .IO Games
Some of the newest .io games include Smash Karts and the fantastically futuristic FPS game, Ev.io. Both games were released in 2020 or 2021 and have already gained traction on CrazyGames. Check out DuckPark.io and Hungry Shark Arena - a Ubisoft Nano title, for two of the newest and most fantastic .io games available.
Most .io games work seamlessly on mobile devices and desktop, since the controls are easy to learn. Browse the full collection on this page for all IO games, and be sure to check back regularly for the latest and greatest browser-based .io titles!
What are the most popular .io Games?
- Shell Shockers
- Smash Karts
- Mini Royale: Nations
What are the best .io Games to play on mobile phones and tablets?
What are .io Games?
IO games are real-time online games you can play in your web browser for free. The most common theme among .io games is online multiplayer. Besides that, these games are mostly based on the domain extension .io, which stands for ‘Indian Ocean.’ The top level domain extension is popular with software engineers since IO is short for 'Input / Output', a common term in computing.
We collected 435 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 and top .io games such as Shell Shockers, Smash Karts, and Slither.io.