Master Chief is once again fighting against overwhelming odds - but that's just the way he likes it to be. Hell, he even tends to thrive under those situations! Once again he's got hordes of alien beasts to slaughter to keep the planet safe... but this time, he doesn't have the advantage of a big high powered aresenal to kill them with - he's stuck with only his pistol! Move your cursor around by moving your mouse to aim at foes. Click the left mouse button and you'll fire off a shot. Up in the top left it shows how many bullets you have remaining in your clip - while bullets are unlimited, you still will want to keep an eye on this because reloading will cost you valuable seconds, leaving you wide open and vulnerable unable to shoot as you swap out a spent clip for a fresh one. Reloading will take place automatically when your clip is empty, ideally you'll want to time this in a way that it's being done in those brief moments between waves of enemies - but this isn't always possible. Up in the top right of the screen there's a meter which displays your current amount of health - once this reaches zero, it's game over for you. See how long you can last against the endless waves of aliens!