IO Games is a genre of thousands of online games that you can hop into instantly, compete against players around the world.

First overview

Born with the viral hit Agar.io, IO games are lightweight, browser-based multiplayer games. Anyone can join in seconds. No installs, just pure competition. You jump into an arena, face off against strangers (or friends). And, the last one standing—or the biggest, fastest, smartest—wins.

Why join this genre?

Instant Action – Open your browser, choose a name, and you’re in the fight.

Global Competition – Battle real players from around the world in real time.

Endless Variety – From snake battles in Slither.io, to tank wars in Diep.io, to survival challenges in Zombs.io, there’s something for every mood.

Simple, Addictive Gameplay – Easy mechanics but tons of skill to master.