Agario was released 2 years ago by Matheus Valadares, a then 19-year-old Brazilian developer. The game has been a massive hit, and the beginning of a new genre. Agario has been sold to Miniclip 1 year later, which focused mainly on monetizing the game (adding coins, skins, and so on...) instead of improving the gameplay or adding new modes. A pity. Other famous .io games : slither.io, diep.io.