All upgrades add more.
Lead your platoon of brave soldiers to victory over the blood thirsty alien invaders.
Use your MOUSE to move, Sarge will follow your mouse pointer, the other soldiers will follow Sarge.
Hold the mouse button to fire, your soldiers will stand still while firing.
Hold down SPACE or SHIFT to stay still and look and aim freely.
Switch weapons using the ,  and  keys (or buttons on the side-panel)