Starting The Big Run

It’s time to get the Big Boss emblem in Metal Gear Solid 4: Guns of the Patriots. Not a task for the faint of heart; play the hardest difficulty level in less than 5 hours, don’t use healing items, don’t kill anyone (you can knock them out with a tranq gun or stun grenade) and don’t get seen by any enemies.

Fortunately, you can save in between rounds, something that a similar task on the original Metal Gear Solid wouldn’t even allow you to do without disqualifying yourself.