Metal Gear Solid Walkthrough Part 3: Second Hostage (Revolver Ocelot Boss Fight)
Following DARPA Chief's mysterious death and shootout with soldiers within the cell block, Snake heads into deepest part of the building in order to locate Kenneth Baker, eventually finding him tied up in one of the rooms. As he intends to free him, Snake learns that Baker is surrounded by wires connected to C4 explosive that will detonate if any of the wires is touched and that his captor, FOXHOUND's interrogator Revolver Ocelot is also in the room, forcing Snake to engage him in brief one-on-one shootout. However, the fight is interrupted by mysterious ninja-like exoskeleton-clad man who slices off Ocelot's hand with the sword and frees Baker before briefly confronting Snake and escaping. Upon interrogating Baker, Snake learns that he broke under Ocelot's torture and gave up his activation code, meaning that FOXHOUND can activate Metal Gear and launch nuclear weapon whenever they want. He also learns that ArmsTech took part in development of new Metal Gear in order to evade merger into larger company, a fate caused by global trend of military downsizing and consequent lesser demand for new weapons following the end of Cold War and loss of bid in development of next-generation fighter jet for the US Air Force, being pointed towards nearby nuclear warhead storage building where Metal Gear REX project lead named Hal Emmerich is held hostage as Snake will need his assistance to deactivate, or in worst-case scenario, destroy Metal Gear while PAL keys neccessary for non-violent deactivation are revealed to have been given to a female prisoner posing as a soldier that Snake helped escape earlier, making it neccessary for two to establish contact. Soon afterwards, Snake witnesses Baker dying in eerily simmilar fashion to DARPA Chief, having also suffered a fatal heart attack before heading out to find entrance into nuclear warhead storage building...