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, officially abbreviated ''MPO'', is an action-adventure stealth video game directed by Masahiro Yamamoto and written by Gakuto Mikumo, with series creator Hideo Kojima acting as a producer. ''Portable Ops'' was developed by Kojima Productions and published by Konami in 2006 for the PlayStation Portable (PSP). ''Metal Gear Solid: Portable Ops Plus'' (officially abbreviated ''MPO+''), the game's stand-alone expansion focused primarily on online play, was released for the PSP in 2007-2008. ''MPO'' is the fourth ''Metal Gear'' title made specifically for the PSP〔Counting ''Metal Gear Acid'', ''Metal Gear Acid 2'', and ''Metal Gear Solid: Digital Graphic Novel''.〕 and the first one to retain the series' action-based play mechanics. It follows 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'' received highly positive critical reception from critics, and is often viewed as one of the best games released for the PSP.〔(PSP Games by Metascore ), Metacritic.〕 It was praised for its visuals, usage of ''Metal Gear'' elements and story, while criticism was directed at the game's control scheme. ==Gameplay== Unlike the previous titles on PSP, ''Metal Gear Acid'' and ''Metal Gear Acid 2'', which were turn-based tactical games with stealth elements, ''MPO'' retains the action-based gameplay from the console iterations, drawing heavily from ''Metal Gear Solid 3: Snake Eater'' and utilizing the camera system from the ''Subsistence'' edition of the game. The main addition to ''MPO'' is the Comrade System. Instead of the solo missions of previous ''MGS'' games, ''MPO'' goes for a squad-based approach, with Snake having to recruit allies and form a team of trained specialists. Before each mission, the player must compose a four-man squad. The squad is then sent into battle.〔〔 Each member of Snake's squad has his or her own strengths and weaknesses.〔〔 While some units are best utilized on the battlefield, others may specialize in producing items, healing allies, or providing intel for each of the game's maps.〔 During missions, the player controls only one squad member at a time.〔 Squad members not in use will hide themselves inside a cardboard box, and can be swapped into play when the player-controlled character finds a hiding spot, where he or she will hide in a cardboard box. A variety of methods can be employed to expand one's squad.〔 If an enemy character is tranquilized or stunned, they can be dragged to a waiting vehicle and captured.〔〔 After a few in-game days, the captured soldier will become a member of Snake's team.〔 The player can also drag enemy characters to any ally waiting in a cardboard box, where, through the use of a transceiver frequency, or by giving the cardboard box a "nudge", the ally will transport the enemy for the player, saving stamina.〔 Alternatively, by accessing the PSP in certain hotspots using the system's Wi-Fi feature, soldiers and even special bonus characters can be recruited.〔〔 The PSP GPS Receiver can also be used to similar effect.〔〔 Since the player's team consists primarily of former enemy soldiers and personnel, generic characters can walk among their own kind undetected as long as the player avoids suspicious actions such as pointing a gun or being spotted by an enemy of another type. Characters that can be recruited by the player include Soviet soldiers, FOX unit members, high-ranking officers, scientists, engineers and government officials. In addition to the standard male characters, the player can recruit and control female scientists and officers as well. The player can also recruit the GRU, KGB and Ocelot unit soldiers from ''MGS3'', but these are only attainable by AP Scan. Characters who are killed in combat are eliminated from the player's squad permanently.〔〔 "Unique characters" (i.e. characters important to the game's story, who can only be added into the player's squad by fulfilling certain tasks) are exempt from this rule.〔 If a unique character is wounded in combat, they are sent to an infirmary to recover, making them unusable for a few in-game days.〔 The player can also restart or abort a mission at any moment. Another new feature is the surround indicator added to the game's HUD.〔 Similar to the radar in previous titles, the surround indicator allows players to determine the relative proximity of enemy soldiers by the noises they make.〔 The surround indicator is composed of two circles; the outer circle displays the noises made by enemies and inner circle displays noises made by the player's character.〔 The game contains a Wi-Fi-enabled multiplayer mode, which is an expansion of the "Metal Gear Online" mode previously featured in ''MeSubsistence''.〔 The player's performance in the Online Mode may affect his or her performance in the single player campaign; the player can recruit and trade soldiers from beaten opponents, or vice versa.〔〔 Additionally, certain multiplayer options result in recruits being removed from the one's single player roster permanently. In contrast to the console games in the series, the cutscenes that drive the story are not rendered using the usual real time engine. Instead, they are presented using an animated comic style consisting of hand-drawn artwork by artist Ashley Wood.〔 This style was previously utilized in ''Metal Gear Solid: Digital Graphic Novel''.〔〔 The game also features voice acting, consisting of returning cast members from ''Snake Eater'' and new actors.〔 However, the number of cutscenes and voiced sections are minimal, due to the PSP's UMD storage capacity constraints.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Metal Gear Solid: Portable Ops」の詳細全文を読む スポンサード リンク
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