Defeat or be defeated. There's no other alternative when you play Agar.io. It's the trendiest entertainment at present for casual gamers that turns you into a tiny dot with a great ambition.
Eat or be eaten.
Manage to become the largest dot of them all
The gamers that spend their time on this game don't do so because of its stunning graphics or its plot. On the contrary, simplicity is one of the greatest aspects of this addictive pastime. You can play online with other users that, just like yourself, will try to eat the rest to grow. All in all, your only way to win is to eat everybody else up and avoid being eaten.