We think it goes without saying that the above video is spoilerific, but just to be clear, we're putting that word in bold so your eyes quickly dart to it. Clocking in at just over 152 minutes, here's a video demonstration of how you earn the Big Boss emblem in Metal Gear Solid 4, which involves beating the game on the highest difficulty with no deaths, no alerts, no kills, no recovery items, no stealth suit and no special items ... all in under 5 hours. Prepare your mind to be utterly blown.

This article was originally published on Joystiq.