Blame the rim-lighting.
Did you watch the trailer for the recently announced Metal Gear Solid: Ground Zeroes over the weekend? But, more important, when Snake revealed himself did you stop and reflect about how he looked quite old?
Let's have another peek at the trailer in question:
It's not grey hair at all, actually, according Kojima. "Saw many tweet about Snake in grey hair after taking off the goggle. This is due to the rim-lighting," he said on Twitter.
So there you have it, guys; if somebody ever makes a comment about your age, just say it's because of the rim-lighting.
Metal Gear Solid: Ground Zeroes alleges to be an open-world game for Xbox 360 and PlayStation 3, though the game currently has no release date.