The Metal Gear Solid games span across decades, though not in chronological order. This should clear the timeline up.

The order given to him is to infiltrate into enemy's headquarters called "Galuade" and destroy Metal Gear. Solid Snake by himself stands up against the impregnable armed fortress. But there awaits ...

That game was Metal Gear Solid, and it helped codify the stealth genre forever. Solid Snake’s story is full of betrayal, blood, and isolation. The initial technological threat in Metal Gear ...

One thing that I was surprised at though was the omission of Twin Snakes, which was the GameCube remake of the first Metal Gear Solid. Admittedly, the first-person mode in that game pretty much ...