While the .io domain stands for Indian Ocean, it holds a different meaning for gamers, developers, and software engineers. In their universe, it means input/output. As you'll notice with games, you provide input by indicating which direction to move and when to shoot. The output is the actual action as a result of your input. Many io browser games present casual gameplay with idle input/output and basic controls. Some of them do the work for you, while you only provide input when it comes to the most critical decisions. Perhaps you want to upgrade how much income is made in the game per second, or you want to unlock new technology via research. We have plenty of browser games that have a main focus on input/output commands. They may appear basic to play, but many of them have more depth the longer you play them. You'll enjoy spending your time with them, giving you a new opinion of these easy online games. Keep an eye out for adventure or crafting game mechanics, as they are really fun to play.