Forget campaigns and survive several enemy incursions in Metro 2033 Random Battles. Shoot at anything that moves in this action game filled with weapons. Start with heavy guns and exchange them for cooler ones simply pressing the F key. Mouse is useful to aim and shoot, yet it's the R key that reloads the gun. Get ready for random battles in the subway and other urban scenarios. Move around with the WAD keys and click Play to start once controls are learned. Watch for the health bar and take cover by crouching with S. Heal friends wounded with the key E.