value on loyalty to ideals and people, something The Boss treasured above all else. When Big Boss learns that his own DNA was being used for Zero's "Les Enfants Terribles" project, this proved to be the final straw. After his defection from Zero's cause, Big Boss plotted coup d'état with Outer Heaven and Zanzibar Land. Although he had survived these defeats, he was placed in an artificially induced coma with his genetic code used for an ID recognition system, the use of which allows access to the AIs that make up the Patriots. His body is recovered and reconstructed using parts from the bodies of both Liquid and Solidus, and he awakens from his coma after the fall of the Patriots' AIs. Following the game's voice casting credits, Big Boss appears before Old Snake. After he reveals the truth about himself and Zero, Big Boss shuts down his catatonic nemesis' life support system. He manages to come to terms with his feelings regarding The Boss, and then reconciles with his son before dying from exposure to the new FOXDIE virus. Metal Gear Solid: Peace Walker Naked Snake's past again serves as the scenario in Metal Gear Solid: Peace Walker after he and his business partner Kazuhira "Kaz" Miller established the mercenary force Militaires Sans Frontières (French for "Soldiers Without Borders") made up of expatriate soldiers recruited to his cause. He intends to use MSF to live out The Boss' final will, a world where soldiers are free to choose their own fights on their own terms, and not at the whim of a government. On Colombia's Barranquilla coast, two apparent representatives of the Costa Rican government (Paz Ortega Andrade and Ramon Gálvez Mena) seek to hire MSF to liberate Costa Rica from Coldman's CIA Peace Sentinel unit that has established bases in the country. Snake accepts the mission after Gálvez hands him an audio cassette with a recording of The Boss' voice. Following Kaz's advice, the MSF takes over an offshore research platform in the Caribbean as their base of operations in a bid to expand the group's capabilities. Over the course of the story, Snake comes to learn about the true purpose of Coldman's Peace Walker prototypes (Pupa, Chrysalis, Cocoon, and Peace Walker) and gradually lets go of his guilt for The Boss' death after encountering an AI replica, finally accepting his Big Boss title. Later in the game,