The story is all in the name. Agar.io stems from the substance agar, which is a jelly-like substance obtained from algae that is used to culture bacteria. You are a single celled bacteria in a petri ...

A free browser game that increases the size by absorbing smaller cells than yourself while manipulating circular cells is called "Agar.io"is. There are many games with the same rules as agar.io, but ...