Enjoy original titles like Slither.io and new .io games such as Rocket Bot Royale, Pixel Warfare, Shell Shockers, and Smash Karts. The first .io game was Agar.io. It was developed by Matheus Valadares …

Play with millions of players around the world and try to become the longest of the day!

Hop into a lobby and start playing IO games against other players. Finding a game full of people may be easy, but coming out victorious will be a challenge.

These games are playable directly through the website without the need for downloads or installations. Dive into a diverse array of Multiplayer experiences, compete with players globally, and enjoy …

Discover the ultimate collection of IO games available online for free. Our platform offers a wide variety of IO games, ranging from action-packed adventures to strategic multiplayer experiences. Whether …

.io games are fast, browser-based Multiplayer Games you play online with real people. Jump into a game round or shared map where everyone competes to survive or climb the leaderboard.

The "io" extension originally stands for "Indian Ocean," but game developers favor it because it also represents "input/output" – perfectly describing the accessible nature of these games.