Biome3d play the most popular agar.io is a 3D version of the game so much more fun. Believe me, when you play it once you will refrain from other games. You won't just control it with the mouse in the game, an enemy may come to you from behind. For this, using the routing keys, to the right, you can get a good look around you by turning it to the left. Biome3d 3dagario game online game. You can always play full screen. Europe, Asia and the Americas you can play on servers.