IO games, which have become a real phenomenon in the world of video games, are simple and attractive, attracting players from all over the world. They offer instant immersion in a game where success depends on ingenuity, quickness of reaction and the ability to adapt to changing conditions. From the moment of its appearance Agar.io In which users control cells that absorb smaller objects, the genre has expanded significantly, offering a variety of mechanics and game styles. Games such as Slither.io where players control snakes and try to grow up, avoiding collisions, maintaining a spirit of competition and interaction. The concept of joint survival and growth has become the basis for other io games, in which the numbers of rivals quickly attract attention and evoke a desire for leadership.