Shooting and killing is fun, especially when you have cool gadgets to help you out. You have been given some pretty awesome glasses that allow you to scan for enemies and things that might help you kill them. Push the spacebar to activate the glasses, and push them again to deactivate them. Hit the right arrow to pick the shotgun, use down to choose the machine gun, use left arrow to pick the hand gun, and use the up arrow for health recovery. Every time you kill an enemy, you will be given some blood in the blood meter. When that meter fills up, it gives you health recovery when you press the up arrow. Use your mouse to aim and shoot.