Games Categories

IO Games

Zlax IO

Zlax IO

BadPoorGoodVery GoodExcellent
1

Agar.io

Agar.io

BadPoorGoodVery GoodExcellent
3

Your zone to play free online IO Games no download at Round Games. Online Io games are a series of real-time multiplayer games of which the name ends in the domain extension “io”. The .io top-level domain (ccTLD) is originally the country code from the British Indian Ocean Territory. But was popularized for games by some of the initial hits in the online io games genre.

In general, IO Games are casual multiplayer games. It involves real-time battles between players in an arena. Players earn points by killing other players. And the top players are listed on the leaderboard. The very first .io game was Agar.io. It was created in 2015 by Matheus Valadares. Then it became an overnight sensation, amassing millions of players. This game features cells which grow by eating agar or other players, and which can be split. Then we have collected some of the best free online IO Games to play now without download on Round Games. So enjoy and have fun.