Agar.io is a game that you span in as a ball and then you have to eat smaller balls that are called mass so you eat the mass and you start getting bigger and bigger when you get big another you can start eating other people and when you eat them you get there mass so when you get really big you get on the leader board you can team up with some one if they want to help you.
Some people are really good at the game that it turns into a habit and get really big on the game so they start putting videos on YouTube.
Jumbo Agar.io Gameplay (8628)
This game can be played on what ever day you want to play it when ever you what to play it . Just the you will need to have internet because the game is a online game.
Agar.io can be played by everyone there is not lone place that you can't play this game.