
The io games boom began with Agar.io, developed by Matheus Valadares. In this game, players control a small cell and consume smaller cells to grow larger while avoiding being eaten by bigger players. Its viral success inspired a wave of similar games.
Soon after, other titles gained popularity, including:
Slither.io – A modern twist on the classic snake concept where players grow longer by consuming glowing orbs.
Diep.io – A tank battle game featuring upgrades and strategic combat.
Krunker.io – A fast-paced first-person shooter playable directly in the browser.
Each of these games maintained the core principles of simplicity and competition while introducing unique gameplay mechanics.