Heading back to the 100th floor basement of Building 3, Snake was contacted by Schneider regarding the truth behind Outer Heaven's leader, but his transmission was cut off before he was able to finish.
Snake pressed on and found himself in Metal Gear's hangar. Placing explosives on its feet as per Dr. Madnar's instructions, while avoiding gun cameras, it wasn't long before Metal Gear was destroyed. Suddenly, Outer Heaven's self-destruct sequence was activated. Making his escape, Snake came face-to-face with the legendary mercenary of Outer Heaven, which turned out to be none other than Big Boss himself.
Big Boss informed Snake that he had only been sent in to gather false information. However, because Snake had achieved too much, Big Boss told him that he had crushed his ambitions and would not die alone. After a ruthless battle, Snake defeated Big Boss and quickly made his way for the escape route, with the timer for the self-destruct sequence ticking away.
After successfully escaping, and with Outer Heaven exploding behind him, Solid Snake called back to HQ, informing them that Metal Gear had been destroyed, and that Operation Intrude N313 had been a success. Shortly thereafter, the South African radio station, KNK, reported breaking news of an earthquake occurring in the Galzburg region before sunrise.
