Unless you lived as a hermit in recent months, you've probably heard of Agario, the game of the moment that is all the rage on browser and also recently on mobile devices. The concept of this massively multiplayer game is basic but very addictive: control a cell using the mouse, grow bigger by eating everything smaller than you and avoid bigger blobs. The more you will increase your size, the more you will lose speed. Agar.io also contains some subtleties, such as the ability to split (Space Bar), eject some mass (W) or the presence of viruses (green cells with spikes) allowing small cells to hide behind them and larger ones to split.