Agario Skins. Agar. Io (also known as Agario and Agar) is a multiplayer browser game in which players have to eat competitors or be eaten while striving to dominate the world of colorful cells. A giant Stalin mustaches, 9gag logo, or even USA flag are all cell skins which Agar. Io game players can easily change before starting the game. Our website is dedicated to all Agario skins and their meanings.