Metal Gear Solid 4 family tree

Big Boss
First appearance: Metal Gear (MSX2)
Nationality: American
Affiliation: None (but he’s the “hero” of MGS3)
Looks like: Sean Connery
Voiced by: David Hayter
Biography: The DNA template for Solid, Liquid and Solidus Snakes, Big Boss was a Vietnam War hero who resented the machinations of politicians, resulting in him attempting to form his own army, Outer Heaven, and constructing the very first Metal Gear. His death at the hands of Solid has sparked much of the conflict in the MGS games.
What he’s doing in MGS4: Despite his “differently alive” status, he’ll play a role. This being MGS, he may not even stay dead…