S.T.A.R. Defence, or Satellite Turret Alien Recon Defence, is a game having you do whatever it takes to defend your planet from the incoming attacks of alien races. To do this, you will need to strategically place satellite turret defenders, or rather, STDs (heh heh), around your planet. Do this by moving your mouse over to where you would like to place it and then press either Z, X, C, or V on the keyboard, depending on which type of satellite that you would like to buy. Aim and fire your currently deployed satellites by simply pointing your mouse cursor at a target and then clicking. The turrets will then fire in the direction of the mouse cursor. Keep in mind that you won't damage your planet with your own gunfire, but also that you can't shoot through it to hit enemies on the other side. Enemies will be spawning in waves that increase in difficulty as you go along. Through destroying your enemies you will earn money that can in turn be used to buy more powerful types of turrets. Each turret has a limited amount of ammo, and will explode once the ammo has been depleted from it. The first wave of enemies will not start until you have placed 3 basic turrets around your planet. See how long you can last in this fast paced game of strategy and tactics!