

MPO is the fourth Metal Gear title made specifically for the PSP and the first one to retain the series' action-based play mechanics. It is the first canonical outing of the Metal Gear Solid series for a portable platform, following the storyline of Metal Gear Solid 3: Snake Eater. Set in Colombia in 1970, six years after the events of Snake Eater, the game follows the exploits of Naked Snake after his former unit, FOX, goes renegade. The game also chronicles the eventual founding of FOXHOUND and The Patriots, as well as the inspiration of the military state Outer Heaven. Metal Gear Solid: Portable Ops has received highly positive critical reception from critics, and is often viewed as one of the best games released for the PSP. It was praised for its visuals, usage of Metal Gear elements and story, while criticism was directed at the game's control scheme.
Portable Ops takes place in 1970, six years after Metal Gear Solid 3: Snake Eater. It follows the soldier Naked Snake (David Hayter/Akio Ōtsuka) who is forced to fight off his former unit, FOX, after they instigate a revolt in a South American base. In his fight he meets Roy Campbell (David Agranov/Toshio Furukawa), a surviving member of the Green Berets team that was sent to investigate the affair. Snake's former teammates including his commanding officer Major Zero (Jim Piddock/Banjō Ginga), Para-Medic (Heather Halley/Houko Kuwashima) and Sigint (James C. Mathis III/Keiji Fujiwara) return as the support crew as they are suspected for treason alongside Snake. The main antagonist is Gene (Steven Blum/Norio Wakamoto), the current commander of the FOX unit who seeks to establish his own military nation. He is a product of the Successor Project that aimed to artificially create the perfect commander, patterned after The Boss. He is assisted by Lt. Cunningham (Noah Nelson/Daisuke Gōri), an expert in interrogation techniques. (who is later revealed to be a double agent of the Pentagon sent to tarnish the CIA's reputation) Gene also has a protégé named Elisa (Tara Strong/Saori Goto) who is gifted with extraordinary psychic abilities, implied to be the result of exposure to nuclear fallout during the Kyshtym disaster. Elisa suffers from dissociative identity disorder and has a developed a second personality called Ursula', whose psychic abilities are stronger than her "Elisa" personality. As "Ursula", she works as a member of FOX, while her "Elisa" personality is a medic who takes care of Null and an informant for Snake. Snake meets Elisa, who initially tells Snake that she and Ursula are twin sisters, only to later learn the truth. Two FOX members previously associated with Snake include Null (Larc Spies/Jun Fukuyama), a teenage assassin trained to be the perfect soldier. and Python (Dwight Schultz/Yusaku Yara), a former war buddy of Snake who was previously presumed dead during the Vietnam War. Other characters include Ghost (Brian Cummings/Naoki Tatsuta), an informant who comes into contact with Snake, revealing the existence of ICBMG, the new Metal Gear prototype, Ocelot (Josh Keaton/Takumi Yamazaki), a former Spetsnaz Major who assists Gene from behind-the-scenes, EVA (Vanessa Marshall/Misa Watanabe), a spy for the PLA who assisted Snake in Snake Eater and Raikov (Charlie Schlatter/Kenyu Horiuchi), a GRU Major. Teliko Friedman (Kari Wahlgren/Yūko Nagashima) and Venus (Kathryn Fiore/Rika Komatsu), the heroines from Metal Gear Acid and Metal Gear Acid 2 respectively, can both be added to the player's squad by either: completing certain side-missions or by starting the second playthrough with save data from their respective games.

Shooter / Simulator / Strategy / Action / Stealth
One soldier on action-packed missions behind enemy lines. Get ready for a fast-paced, easy-to-learn combat game featuring intelligent challenges, suspenseful scenarios and endless action- perfect for arcade gamers, combat strategists and simulation fans alike. Nobody but Microprose could pack so many kinds of fun into just one game. Go in with guns blazing, or try a subtle approach by crawling through trenches and natural cover- the choice is yours! Leap into combat with an M-16, grenades, anti-tank rockets and timed plastic explosives. Overcome enemy soldiers, machine gun nests, minefields, robot mini-tanks and more! Run, walk, crawl and shoot in any direction across full-scrolling, 3-D terrain that changes every time you play.

Shooter / Tactical / Adventure / Action / Science fiction
Metal Gear Solid is a stealth game created by Hideo Kojima which follows the MSX2 video games Metal Gear and Metal Gear 2: Solid Snake. Despite a transition to 3D, Metal Gear Solid's gameplay remains similar to his predecessors. The game utilizes a traditional top-down view and the player must navigate the protagonist Solid Snake through the game's areas without being detected. Detection will set off an alarm which draws armed enemies to his location. Conversations with Snake's allies and cutscenes are used extensively to advance the plot and gain more insight into it. Metal Gear Solid is regarded as one of the greatest and most important video games of all time, and helped popularize the stealth genre and in-engine cinematic cutscenes.

Shooter / Tactical / Adventure / Action / Survival
Metal Gear 2: Solid Snake is an action-adventure stealth video game created and published by Konami for the MSX2 computer platform. Acting as a direct continuation of the MSX2 version of the original Metal Gear, it was written and designed by the series' creator, Hideo Kojima. Kojima's inspiration for this game arose as a response to the development of Snake's Revenge, a separate sequel being produced simultaneously for the NES, intended primarily for the North American and European markets.

Shooter / Tactical / Adventure / Action / Science fiction
Metal Gear is considered to be the progenitor of the stealth game genre, it was also the first video game designed by Hideo Kojima, who also directed many of the later Metal Gear sequels. The game revolves around a special forces operative codenamed Solid Snake who goes into a solo infiltration mission into the fortified state of Outer Heaven to destroy Metal Gear, a bipedal walking tank capable of launching nuclear missiles from anywhere in the world. The player must navigate the main character, a military operative codenamed Solid Snake, through various locations, while avoiding visual contact and direct confrontation with patrolling guards. If the player is seen, the game enters the "Alert Mode." In this situation, Snake must escape from enemy's sight in order to resume infiltration. The method of escaping varies depending on the circumstances behind discovery: If Snake is seen and only a single exclamation mark appears over an enemy's head, only the enemies in the player's present screen will attack and Snake can escape by simply moving to an adjacent screen. However, if two exclamation marks appear over the enemy (or the player triggers an alarm by being spotted by a camera, infrared sensor or by using an unsuppressed weapon), reinforcements from off-screen will appear as well. Snake can only escape by eliminating all incoming enemies, going outdoors, or by entering an elevator. The player starts the game unarmed, but eventually acquires firearms such as a Beretta 92F and an M79 grenade launcher, as well as explosives such as remote control missiles and landmines. Ammo and supplies for weapons are limited, but are replenished by picking up ammunition caches or additional supplies. Weapons can not only be used to kill enemies, but also to clear obstacles such as hollow walls and electrified floors. Snake can also use his fists to punch and defeat patrolling enemies. Occasionally, if the player defeats a guard with punches without alerting anyone, the defeated guard will yield a single unit of rations or an ammo box that can be picked up. In addition to enemy guards, the player will also be confronted by mercenaries who will challenge the player to combat, serving as the boss characters. The enemy base consists of three different buildings, with multiple floors (including basement levels) within them. The player uses key cards and other items to unlock doors and explore new areas. Each door will only open to its corresponding key cards. Information can be obtained by rescuing hostages being held within the buildings. After rescuing five hostages, the player's rank will increase by one star (with the maximum rank being four stars), allowing for increased carrying capacity and maximum health. However, if a hostage is killed, the player is demoted to the previous rank. A transceiver is available for the player to communicate with their commanding officer, Big Boss, or one of the resistance members operating covertly near Outer Heaven (Schneider, Diane, and Jennifer). Each of Snake's allies specializes in a specific subject. The player must keep track of their allies' frequency numbers in order to contact them. All of the radio messages are dependent on the rooms where the player is located.

Shooter / Tactical / Adventure / Action / Stealth
Metal Gear Solid: Integral is an expanded version of the original game. It includes most of the changes and additions that were made in the NTSC-U/C version of the original Metal Gear Solid as well as new features unique to this release, including a third disc consisting almost entirely of VR training missions.

Shooter / Strategy / Tactical / Action / Historical
The player play four Allied commandos in operations during World War 2. Mission vary from bomb planting to hostage rescue. The player can even drive tanks and other vehicles. The player can control a soldier in FPS mode and control the rest in a tactics mode. The campaign is divided into many episodes, and each episode into missions.

Shooter / Tactical / Adventure / Action / Stealth
Metal Gear: Ghost Babel is a Game Boy Color spinoff of the popular stealth action game Metal Gear Solid. This is not a port of said game but an original game made specifically for the Game Boy Color. Metal Gear: Ghost Babel is a non-canon game that serves as an alternate sequel to the events of the original Metal Gear.

Shooter / Tactical / Action / Stealth
Tom Clancy's Rainbow Six makes its next-generation hardware debut in the most dramatic installment of the renowned first-person shooter franchise to date. Experience Las Vegas like never before – through revolutionary next-generation technology as you work against the clock to keep one of the world's most recognizable cities from utter devastation.