In 1970, six years after the events of Metal Gear Solid 3: Snake Eater (2004), Snake has to fight against his own unit, FOX, which has turned renegade and captured a nuclear base in South America.
This is the only canonical Metal Gear game where one of the playable characters does not gain the infinity bandana, or similar special items.
Gene:
What's it going to be? Loyalty to your country, or loyalty to yourself? Your country, or your old mentor? The mission, or your beliefs? Your duty to your unit, or your personal feelings? Look at how much you've lost already! What kind of country ...
Japanese