.io games are multiplayer games that never stop. You can take on other players from all around the world in endless battles or competitions that go around the clock, 24 hours a day!
The term ".io game" dates back to 2015 when the very first one went online using a .io domain based in a region called the British Indian Ocean Territory. Titled Agar.io, it became incredibly popular. As a result, other game programmers also decided to use .io domains with their own creations, thus creating a whole new genre of online gaming!