You are Petty Officer Spartan-117, better known as the Master Chief. An enhanced super soldier fitted out with the most advanced array of tactical weapons imaginable and a suit of assault armor that will protect you against the most lethal of attacks. Your target is the Forerunner Dreadnought. It is a command craft miles long, miles wide, filled to the brim with hostile Covenant forces and heading for Earth to activate the world-shattering weapon known as Halo. It's time to lock, load and save billions of people -- or die trying.