|This article is about the codename. You may be looking for the bosses featured in the Metal Gear series.|
Boss was a title bestowed upon individuals who displayed extraordinary fighting capabilities and services to their country. Only two individuals were known to have held the title of "Boss."
- Big Boss (originally known as Naked Snake): the founder and commander of FOXHOUND, the private military contractor of Outer Heaven (originated from the Militaires Sans Frontières) and Zanzibar Land, and the genetic father of Solid Snake, Liquid Snake, and Solidus Snake.
- The Boss (originally known as The Joy): the mother of U.S. Special Forces, the founder and leader of the Cobra Unit, the biological mother of Ocelot, and the mentor/spiritual mother of Big Boss.