Save your men using a mechanical vehicle! To guide your vehicle along the terrain, use the arrow or WASD keys, which ever you prefer. Aim your gun with the mouse, and click the left mouse button to shoot. Finally, press Spacebar to fire a mortar, and kill several enemies at once. But, you only have a few mortars, of course. They wouldn't make it that easy now would they!? If your health is getting low, search for one of the health packs lying around the place. There are four levels, each set in a different location, to conquer.