If you saw the gameplay demo of Metal Gear Solid: Ground Zeroes
in action you may be wondering why Snake appeared older than the promotional images released at the Metal Gear 25th Anniversary
event in Japan.
On his Twitter feed, Hideo Kojima confirmed that Snake's hair wasn't grey at all and it was mainly due to a 'rim-lighting' effect. I wouldn't put this 'effect' pass Kojima as a way to keep people guessing.
Saw many tweet about Snake in grey hair after taking off the goggle. This is due to the rim-lighting.
He also posted an image showing a moment in the gameplay demo where he appears to have a darker looking beard.
Having confirmed this 'issue', Kojima continues to withhold information on the era and location(s) of where the game takes place. The mention of Paz and Chico in the demo could very well place Ground Zeroes not to long after the events in Peace Walker.
No release date has been set for Metal Gear Solid: Ground Zeroes yet but it’s expected to be available for the Xbox 360 and PS3.