Metal Gear, Snake's Revenge, and MG2: Solid Snake.
Gametrailers.com - Metal Gear Retrospective - Part One

Metal Gear Solid, VR Missions, and The Twin Snakes.
Gametrailers.com - Metal Gear Retrospective - Part Two

Metal Gear Solid 2: Sons of Liberty and MGS2: Substance.
Gametrailers.com - Metal Gear Retrospective - Part Three

Metal Gear Solid 3: Snake Eater, MGS3: Subsistence, and the story of Portable Ops.
Gametrailers.com - Metal Gear Retrospective - Part Four

The handheld missions of Ghost Babel, AC!D and Portable Ops.
Gametrailers.com - Metal Gear Retrospective - Part Five

A chronological briefing of Snake tales from 1964 to 2014.
Gametrailers.com - Metal Gear Retrospective - Part Six