Two 3
Aim the turret of your tank with the mouse, and use the 2 and 3 keys on your keyboard to fire. Your 'bullets' are numbers, either 2s or 3s, depending on which key you press (2 for 2, 3 for 3, obviously). Numbers shot from your tank's turret at the enemies will subtract their value. Bring their values down to exactly zero to score. A challenging game that requires you to not only have quick reflexes but to also be using your brain in the process. Highly recommended and addicting game that you'll have a ton of fun with.