Metal Gear Solid: Portable Ops (commonly abbreviated to MPO) is a stealth action game directed by Masahiro Yamamoto and produced by Noriaki Okamura and series creator Hideo Kojima. Portable Ops was developed by Kojima Productions and published by Konami in 2006 for the PlayStation Portable. It is the fourth Metal Gear title for the PSP and the first one to retain the series' action-based gameplay. It was also the first game to utilize graphic novel inspired cutscenes.
Set in 1970 in South America, six years after the events of Metal Gear Solid 3, the game follows the exploits of Big Boss after his former unit, FOX, goes renegade. The game also chronicles the eventual founding of FOXHOUND, as well as the inspiration of the military state Outer Heaven.
According to Kojima, Portable Ops's official abbreviation, MPO, was intended to stand for "Metal Gear People Online," paralleling how Metal Gear Online was abbreviated MGO.
PlotSix years after the events of Operation Snake Eater, Naked Snake's former team, FOX, has broken their allegiance with the CIA and gone renegade. Snake himself is also targeted by the FOX unit, which sent renegade FOX unit soldiers to attack and capture him. Snake is tortured and interrogated by one of the members of FOX, Lieutenant Cunningham, who's trying to locate the whereabouts of the missing half of the Philosophers' Legacy, with the United States Government having already acquired the other half of the Legacy from the Soviet Union at the conclusion of Operation Snake Eater. Snake is imprisoned in a cell next to Roy Campbell, the sole survivor of an American Green Beret team sent in to investigate the base. Snake learns through Campbell that they're on the San Hieronymo Peninsula, the site of an abandoned Soviet missile silo in Colombia.
The two escape and Snake makes his way to a communications base, where he attempts to contact his old CO, Major Zero. Instead, he is greeted by his old FOX comrades Para-Medic and Sigint, who reveal that Snake and Zero are being accused of instigating the revolt and that the only way for Snake to clear their name is to find and apprehend the leader of the rebellion, Gene. To complicate matters, Gene has also convinced most of the Russian soldiers stationed on the base to join their side by simply taking over the chain of command of a former Red Army unit, that was secretly stationed inside the Colombian territory. In order to complete his mission, Snake must persuade enemy soldiers to join his ranks.
Please Note: This is an NTSC-J Japanese version game. PSP's however are not region-locked, meaning that the game will play on any model of PSP, regardless of country of origin.