User blog comment:TheBlueRogue/The Timeline of Big Boss/@comment-25854010-20150916093517

There are unrelated timeline of Metal Gear Series were not part of:

Snake's Revenge: Formerly, Big Boss was a support character in the first game, later became a cyborg as a main antagonists.

Metal Gear Ghost Babel: In alternate sequel, Big Boss died when he fight his son, Sloid Snake.

Metal Gear Acid: Nobody mentions about Big Boss.