When you’re in Aim Mode, you’ll see a set of crosshairs at the center of the screen. That’s your targeting reticle, which is basically the sight you’ll use to aim every weapon in the game. To enter Aim Mode, hit the F2 key or click the middle mouse button. Reticle size matters—the smaller the reticle, the more accurate your attack will be. Remember, there is no aiming help here—no sticky targeting, no auto-aim—nothing but you, your weapon, and your target.