Metal Gear Solid: Peace Walker/Characters

Snake
Snake is a world-renowned soldier and infiltrator. Formerly affiliated with the CIA's FOX unit, Snake is now a mercenary commander with a following of fanatically-loyal soldiers organized into the unit Militaires Sans Frontieres (MSF). In the 1960s, he was sent into Soviet territory to assassinate his mentor The Boss, averting global thermonuclear war. After the completion of this "Operation Snake Eater" and saving the world, Snake became known among soldiers and mercenaries in the West and East as "Big Boss."