Uploaded September 2025 | Updated September 2026, 6 hours ago

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The year is 1974. In Costa Rica, an unknown army of well-equipped soldiers has taken over the defenseless country. The soldiers have also brought along a nuclear warhead labeled "Peace Walker", to set off their last nuclear warhead for deterrence, and demonstrate their power with the perfect deterrent.[1] Big Boss is asked to save the country along with his Militaires Sans Frontières (Soldiers Without Borders). It is later learned that the soldiers that invaded the country are a rogue CIA unit, as well as the fact that the MSF's client, a University for Peace professor named Ramón Gálvez Mena, is actually an agent of the KGB. If Big Boss fights them then he will become an enemy of America. Eventually, Big Boss and his soldiers would come to be known as the founders of Outer Heaven.