I mean, big if you really like MGSV. Myself, I hadn't picked it up for weeks until I heard this little tidbit and had to try it out. So no spoilers here, but after a "certain" event that people got all mad about... Go play mission 11. And then go play it again. And again. And keep playing it until you've finished it seven times. The word "Replay" in front of the mission will change. To... ah... something else. Yes, I know I'm being cryptic, but I'm typing this on a phone. My PC is broken.