Eater depicts a young incarnation of the character, under the codename Naked Snake, as a member of the CIA special forces unit FOX in 1964 that was founded by Zero. With Para-Medic and Sigint for additional support, he is sent on an assignment in the Soviet Union to thwart an uprising led by the sadistic Volgin, rescue key weapons researcher Nikolai Stepanovich Sokolov, destroy the Shagohod prototype, and kill The Boss, his mentor who defected to the Soviet Union, to avert a nuclear war. Over the course of his assignment, he encounters Major Ocelot multiple times, fights and defeats the Cobra Unit (consisting of The Pain, The Fear, The End, The Fury and The Sorrow). After the mission is completed and Snake kills The Boss, he learns that the defection was part of a mission to be carried out, and the government ordered his mentor's death to prevent war. According to EVA's debrief, the political motives behind the operation do not sit well with Snake, especially after he is awarded the Big Boss title for his actions which he initially rejects, prompting him to retire from active service. Metal Gear Solid: Portable Ops Metal Gear Solid: Portable Ops shows Naked Snake still under his former codename, believing that he has yet to surpass The Boss as a warrior. Having spent six years wandering the globe, Snake finds himself involved in an armed uprising caused by Gene's rogue FOX unit in the (fictional) San Hieronymo peninsula in Colombia and learns that he has been convicted for instigating the revolt. Hoping to clear his name, Snake forms his own team of specialists by recruiting both old allies and defecting enemy soldiers to his cause, one of whom happens to be Roy Campbell. He faces not only the members of the FOX unit, but also Metal Gear's first prototype. After he learned that The Boss' death had been planned all along, Snake defeats Gene and obtains the funds for Army's Heaven. Metal Gear Solid 4: Guns of the Patriots Metal Gear Solid 4: Guns of the Patriots revealed that Big Boss was one of the founding members of Zero's cause to initially realize The Boss' dream, but this spiraled into a conspiracy to impose order and control over the world after Big Boss disagreed with Zero's interpretation of the dream. Big Boss despised his role as figurehead, especially since Zero's vision placed no