Most people believe that IO Games are those with.io as their top-level domain, but this is not the case. Little Big Snake, for example, has always been a.com domain (and not a .io domain).

IO Games are a type of game that is designed to be played for free in the browser, has simple controls, is multi-player, and can be played with players from all over the world. Typically, the game has minimal, appealing graphics, but some IO Games these days can have comprehensive graphics and are also available for download on phones/tablets.

In these games, the player's usual goal is to gain as much weight, height, or territory as possible. The game is still unending.

Nobody knows why this game genre is called "IO," but it is said that the trend started with the first MMO game, Agar.io, which had the aforementioned features, and it went viral, after which many more such games developed, such as slither.io, diep.io, cell.io, and so on.

Why are io games so popular?

— Simple and enjoyable gameplay — Multiplayer and team play with a large number of online players.

— Simple to start and learn, because most games have continuous gameplay.

Unlike mainstream "freemium" games, io games are completely free, with no additional payments required. Some io games can also be found on the iOS and Google Play stores.

Can I play io games free?

You might think that because it's a browser game, an io game can run on any device, but you'd be wrong. Because the game runs in the browser, it makes extensive use of the device's resources. As a result, games on older computers may be laggy. To avoid them, you will need a relatively new computer and a high-speed network connection. If the game continues to lag, try exiting full screen mode. In some games, you can also lower the graphics quality.