Interrogation

Interrogation is interviewing as commonly employed by officers of the police, military, and intelligence agencies with the goal of extracting a confession or obtaining information. Interrogation may involve a diverse array of techniques, ranging from developing a rapport with the subject to outright torture. In addition, soldiers that are captured and interrogated normally give the primary four necessities, which are name, rank, serial number, and date of birth.

Electric shock
Electricity-based torture was first widely-practiced by the French. It involved administering gradually increasing electric shocks to the victim, pausing only to demand answers from the person being questioned with the implication that they'll continue if they either don't answer or don't give the correct answer. The person is generally equipped to a machine that administers electric shocks, although they can be hit with electric rods as well. In some cases, they also douse the victim with water beforehand, in order to ensure that they receive the shocks due to water conducting electricity.

Physical
Physical-based torture, as the name suggests, involved physically beating the victim until the victim talks. It can range from grabbing the person being questioned and being lifted into the air, to being restrained and placing a knife or a similar object inches away from the throat, to being suspended and beaten, to bamboo manicures (which involved slowly removing the victim's nails for maximum pain, each one until the victim talks, and if that doesn't work, removing the teeth), to strangulation, even to prolonged beatings. Sometimes, the interrogator will also threaten the person at gunpoint to force a confession.

Serum-based
In some cases, the victim is injected with drugs that ensure they talked. Commonly referred to as truth serum, the most common drug used is Sodium Pentothal.

Waterboarding
The victim is force-fed water to simulate drowning until they are forced into talking.

Psychological
This form of interrogation involves subjecting the victim to mind games, some simply by tricking them, other times by directly tormenting their minds such as torturing someone's loved ones or holding them hostage until they talk.

Colonel Volgin
GRU Spetznaz colonel Yevgeny Borisovitch Volgin was a renowned practitioner of interrogation via torture, during the Cold War. In August 1964, during the time of Operation Snake Eater, Volgin tortured Aleksandr Leonovitch Granin and Nikolai Stepanovich Sokolov in Groznyj Grad, as to who they had passed secret data on to. He proceeded to beat the two to death with his bare fists (Granin while in a metal drum), though unbeknownst to Volgin, Sokolov would survive. In addition, when Sokolov refused to be led back to finish the Shagohod, Volgin tortured Tatyana in front of Sokolov in order to force Sokolov into cooperating. Volgin also frequently tortured Tatyana with "hentai play" on his own free time.

After capturing CIA spy Naked Snake, Volgin put a plastic bag over his head and suspended him above the floor of a prison cell by his arms, before beating him and demanding to know what his mission was. When Snake refused to answer, Volgin doused him with water, then administered him with high voltage electric shocks with his unexplained powers of electricity. However, this too failed, although it was brutal enough for Naked Snake to urinate himself due to the pain and have Volgin taunt him about it. Volgin also intended to torture Snake at a future point, also threatening the guard with the penalty of death should Snake die before he returned, although Snake's escape from Groznyj Grad forced him to abandon these plans.

U.S. Government
During Naked Snake's recovery at an ICU, the U.S. Government frequently questioned him regarding his possible involvement in The Boss's defection, enough for Snake to request that Major Zero let them know about visiting hours. Zero explained that they were looking for a scapegoat, and implied that he was in exactly the same situation as Snake.

During the Shadow Moses Incident in 2005, Naomi was to be interrogated regarding the modifications she had made to the FOXDIE virus. Roy Campbell wished to avoid the "rough stuff," but there were few alternatives, since even Sodium Pentothal was unavailable for use.

EVA
While operating under the alias of Tatyana, EVA interrogated Sokolov as to the location of the Philosophers' Legacy. She threatened him with a supposed "kiss of death"; a single-shot gun disguised as a lipstick. He denied any knowledge on it in a panic. Tatyana then revealed that she was bluffing by unrolling the cylinder to reveal that it was normal lipstick and put it on her own lips.

Revolver Ocelot
As a member of the Spetsnaz, Major Ocelot often performed a variation of Russian roulette with his three revolvers in order to intimidate a subject. After suspecting that Tatyana was a spy, he used this method to test her loyalty, though he would have shot her had Naked Snake not intervened.

Witnessing Volgin's earlier torture of Snake left an impression on Ocelot, and he concluded that it was the "ultimate form of expression."

After Big Boss awakened from his coma after the attack on Mother Base, Ocelot allied with him and Kazuhira Miller, acting as the interrogation specialist for the Diamond Dogs unit. His torture victims included the sniper Quiet and scientist Huey Emmerich. He oversaw the former being subjected to electroshocks, while he personally doused the latter with water and injected what was presumably truth serum in the neck.

He would later participate in the Soviet invasion of Afghanistan, becoming feared amongst the Mujahideen as a sadist, for which they named him "Shalashaska." He also worked in the Soviet Union's concentration camps as a special torture advisor, and was known to have utilized the Lubyanka prison beneath KGB headquarters for training in interrogation of his victims.

In the early 2000s, he became FOXHOUND's interrogation specialist under the codename Revolver Ocelot. During the Shadow Moses Incident, he tortured both the ArmsTech president Kenneth Baker and DARPA Chief Donald Anderson in order to learn the detonation codes for Metal Gear REX. He broke Baker's arm and learned his code. In Anderson's case, he was deliberately killed by Ocelot since he known the latter's identify. His death was then covered it up as an accident. Ocelot would later torture Solid Snake regarding an alternative means of activating REX, also threatening to do the same to Meryl Silverburgh should he submit. He utilized a machine that administered electric shocks, steadily increasing the duration as each session progressed, though Snake refused to submit.

During the Big Shell Incident in 2009, Ocelot injected Emma Emmerich with truth serum in order to learn information relating to GW, so that Solidus Snake could activate Arsenal Gear.

Cunningham
Lt. Cunningham served as the interrogation specialist of the FOX unit. In November 1970, during the San Hieronymo Takeover, Cunningham tortured Naked Snake by subjecting him to electric shocks with shock rods, as well as forcing his prosthetic leg down on Snake's groin, in order to locate the other half of the Philosophers' Legacy (which he and the Pentagon were led to believe that Snake stole at the end of Operation Snake Eater).

Following Snake's escape and subsequent recapture, Cunningham proceeded to remove Snake's clothes, tie him to a chair, and beat him as part of his interrogation, although Snake's prior experience as a FOX member made him resistant to physical torture. He then planned to inject Snake with a new model of truth serum to force him to reveal whatever he knew about the Legacy, with his commanding officer Gene reluctantly allowing him to do so, since he believed that the serum might break him before they gleaned anything useful.

After Snake was rescued by some personnel, who he had earlier recruited to help stop FOX, the group were ambushed by Cunningham and a unit of soldiers. Cunningham, persisting in his efforts to locate the Legacy, wounded two of Snake's companions by gunshot, in an attempt to make him speak, until Elisa intervened.

Peace Sentinel
During the Peace Walker Incident in 1974, the CIA Peace Sentinel tortured many Sandinista captives during their secret operations in Costa Rica, and succeeded in breaking some of them, usually executing them afterwards. In addition, Paz Ortega Andrade ended up tortured shortly after she stumbled upon the facility allegedly in search of a lost friend, of which she received scarring on her arms as a result. Dr. Strangelove also tortured Naked Snake after his capture, utilizing electric stun rods (or laughing rods), in order to learn more about The Boss's final mission in Tselinoyarsk.

Colombian government soldiers
During the 1970s, various Colombian soldiers practiced interrogation techniques, including digging bamboo shards to forcibly remove the fingernails for a long period of time, and eventually yanking out the 28 teeth once all 20 nails are removed. It was originated by and favored by the French during the Indochina wars.

Big Boss and his allies
Naked Snake, a.k.a. Big Boss, and his military forces would often use interrogation techniques for acquiring classified intelligence, namely via threatening to put a knife through the interrogatee's throat, or in the case of the Peace Walker Incident, shocking the individual on the neck via the stun rod.

During the San Hieronymo Takeover in 1970, Snake's resistance soldiers interrogated high-level individuals, including a government official who had aided FOX in their rebellion, and a Soviet officer who manned the peninsula's missile silo, for information regarding the location of the silo and guest house, respectively, the latter of which was where Snake was being held prisoner. The resistance soldiers later interrogated a FOX soldier and a Soviet soldier, regarding a radio frequency to unlock a frequency-locked door at the peninsula, which contained supposed blueprints for the Saturn V rocket. Snake himself also ended up interrogating Cunningham about what his stake is in the mission while he himself was interrogated by the latter, after Cunningham inadvertently implied that he was actually taking orders from the Pentagon, not the CIA as he had earlier led him to believe.

Although Big Boss himself never practiced any interrogation techniques during his job for the Colombian government in 1972, he did teach the various soldiers some interrogation techniques, including the aforementioned bamboo manicure, and informed then-freelance mercenary Kazuhira Miller as much when trying to convince Miller to join the Militaires Sans Frontières.

In November 1974, during the Peace Walker Incident, Big Boss interrogated a Peace Sentinel radioman at a shipping facility in Puerto del Alba, following a brief struggle. Pressing a stun rod to the man's neck, he learned that their shipments were headed for Mt. Irazu, though he was forced to shock the man into unconsciousness after he broke free. Though unable to learn the cargo's contents, Big Boss deduced that they were nuclear weapons, based on the presence of film badges in the facility, and the radioman's earlier use of the word "spears." During Paz's stay on Mother Base, Big Boss also ended up interrogating Miller about the latter's womanizing behavior after it resulted in one of the soldiers being hospitalized for a month, which eventually escalated from an argument to a full-scale brawl in the sauna.

On December 21, 1974, during a reconnaissance mission, Big Boss, in order to covertly be supplied information by an undercover agent without either of them blowing his cover at the base, forcibly restrained him and proceeded to interrogate him, before knocking him out at his request. He later interrogated the agent again, this time in a genuine manner after it became apparent that the agent set him up. Upon learning who had the actual tape as well as the implication that Cipher had held the agent's family hostage, Big Boss then tracked down the person, a bald Marine, and interrogated him into giving up the tape.

On March 16, 1975, Big Boss and the rest of MSF also intended to interrogate ex-Cipher agent Paz Ortega Andrade shortly after they rescue her from Camp Omega alongside Chico, so they can find out more about Cipher and its goals. Kazuhira Miller, after XOF's attack on MSF that same night, interrogated Paz out of anger for the losses he and MSF suffered that night.

In 1984, Big Boss and Kazuhira Miller oversaw the interrogation of Huey Emmerich, presumably due to the latter's suspected role in the Mother Base attack. Big Boss, prior to the interrogation, also placed a black bag over Huey's head.

XOF/Skull Face
Skull Face frequently did inhumane torture, including forcing Chico to have sex with Paz, as well as ordering the rape of Paz, all to get information on Zero's location and gather intel on Mother Base and MSF. He also tortured another prisoner to make him see his viewpoint, an action that resulted in the prisoner dying. Skull Face himself ended up tortured as a youth by foreigners.

Frank Jaeger
During the Mozambican Civil War, Frank Jaeger was captured and tortured as a RENAMO soldier, during which his nose and ears were cut off.

South America
The girl who would eventually become Screaming Mantis briefly hid in a building that was actually the basement of a torture chamber, and was slowly driven insane by the screams.

Red Army
During the Soviet invasion of Afghanistan, some Soviet soldiers interrogated a female soldier by waterboarding her. In addition, several Soviet soldiers, presumably allied with either Cipher or XOF, ended up capturing and interrogating Kazuhira Miller ten days prior to Big Boss awakening from his nine year coma, with the interrogation being prolonged and brutal enough to result in the loss of the latter's right arm and leg, and leaving him too exhausted to even attempt to escape without aid by the time Big Boss found him.

Army of the Devil
During the Liberian Civil War, an African soldier interrogated another soldier in their unit after one of their operations ended up being anticipated by the enemy, questioning him whether he had leaked any information to the enemy, while also threatening that the soldier would be executed along with his family if he doesn't respond, with the soldier also implying that he'll rape the soldier's wife before killing her, an interrogation process that Jack bore witness to. Whether the soldier actually leaked the information or not was ultimately not revealed, as Solidus Snake, then the group's commander, decided to slit his throat to demonstrate to Jack a blade's nobility compared to a gun. Jack, later known as Raiden, would later flash back to this event after undergoing emergency surgery as a result of a mission gone awry in Africa.

Zanzibar Land
The Zanzibar Land personnel, including Drago Pettrovich Madnar, interrogated Kio Marv on the location of OILIX, with Madnar in particular strangling him. However, he died before he could divulge the location due to heart problems.

Solid Snake
During the Shadow Moses Incident, Solid Snake, when Kenneth Baker failed to remember Meryl's frequency, ended up threatening to shoot Baker in the face to jog his memory in irritation, with Baker eventually remembering the frequency, or rather, it being on the back of the package. Snake later interrogated Hal Emmerich on Metal Gear REX, briefly grabbing him and lifting him off his feet when he claimed that REX was solely a defensive weapon. However, Snake stopped when he realized that Emmerich had been kept in the dark about REX's true purpose.

Raiden
Shortly after Fatman activated his ultimate C4 package, Raiden attempted to interrogate him in regards to what he just did. After Fatman initially ignored Raiden's rapport, Raiden forcibly removed the front of Fatman's laminated ballistic insert collar and demanded that he explain.

Nine years later, he then repeatedly questioned Sundowner about what would end up happening within three hours, eventually getting an answer shortly after defeating him, as well as asked whether Armstrong was involved when Sundowner replied weakly that "he'll launch Operation Tecumseh." However, although he learned about Operation Tecumseh's launch, he was unable to learn anything else from Sundowner, who simply stated that he "has already said too much."

Solidus Snake
After the AI GW became affected by a worm cluster during the Big Shell Incident, Solidus Snake injected Raiden with truth serum and interrogated him on information relating to the Patriots, atop Arsenal Gear. Solidus held him above the floor and choked him with the "snake arms" of his powered suit, although he realized he would have more success learning the information from Raiden's nanomachines, inside his cerebral cortex.

Outer Heaven PMC mother company
Outer Heaven subcommander Vamp, after Raiden was briefly restrained by the tendrils of various Gekko, cut into Raiden's cybernetic body. However, Raiden did not flinch from the cuts, causing Vamp to ask if Raiden was immortal, only for Raiden to respond that he simply didn't fear death shortly before being freed from his restraints by Snake.

World Marshal Inc./Desperado Enforcement LLC.
During the Abkhazian Coup in 2018, some cyborgs belonging to the PMC aiding the coup, Desperado Enforcement LLC., upon discovering a civilian near the main gate, suspected that he may have been a Russian spy, and proceeded to interrogate him. They then decided to execute him regardless of whether he was or not, although Raiden saved the civilian before they could get the chance.

A few days later, at Denver, Colorado, several cyborgs aligned to both Desperado and World Marshal Inc. found a civilian who failed to obey the order to evacuate Denver, and proceeded to interrogate him as to why he did so, before they decided that they had enough of it.

Unconfirmed usage
Kazuhira Miller was captured by the Viet Cong during the Vietnam War, having participated as a mercenary for the Army, and then tortured as a prisoner of war until he escaped from captivity and decapitated the head interrogator via gunshot.

After Liquid Snake was captured during the Gulf War, he ended up brutally interrogated by the al-Amn al-'Amm interrogation squads. It was because of this experience that he believed that humanity's true nature was violent and irredeemably evil.

During the Shadow Moses Incident in 2005, Naomi Hunter, after having been suspected with tampering with the FOXDIE program, was briefly interrogated, with her stalling. She then contacted Snake with her spare Codec when it was over, with her also believing that Colonel Campbell was not aware that the interrogation was actually over.

Behind the scenes
The act of interrogation has appeared often throughout the Metal Gear series, both within the games' storyline, and as a gameplay feature utilized by the player. Interrogation first appears in Snake's Revenge, the non-canon sequel to the original Metal Gear.

On September 20, 2013, Kojima confirmed in both TGS 2013 and Eurogamer that there will be a torture scene in Metal Gear Solid V: The Phantom Pain, though it is not actually interactive for the player. He implied that the reasons for the non-interactive aspect was due to the game's secondary theme being revenge.

Interrogation of the player
Interrogation of the main protagonist has featured in the series' canon storyline since Metal Gear Solid. Often the player's character is captured by the enemy and then subjected to interrogation via torture. Metal Gear Solid, Metal Gear Solid 2: Sons of Liberty, and Metal Gear Solid: Peace Walker, all feature an interactive torture sequence, in which the player must repeatedly press the action button to resist, or else die. Metal Gear Solid also features the option to submit, which results in an alternate ending to the game.

In the Grand Game Plan for Metal Gear Solid 2, it was initially planned that Raiden, Pliskin/Solid Snake, and Emma Emmerich would end up captured by Dead Cell and tortured, with Raiden specifically being injected with sodium penthanol, Pliskin apparently being killed from the torture, and Emma being killed as a result of the torture, the former two having been captured when an attempt to rescue her backfired. It was also during this instance that Pliskin's true identity of Solid Snake would have been revealed, due to a blood test that Fortune and Vamp conducted prior to the interrogation. Although ultimately cut by the time of finalization, Metal Gear Solid 3 did use a similar concept for Snake's capture and interrogation at the hands of Volgin.

A button-prompt torture sequence was also to have featured in Metal Gear Solid 3: Snake Eater, but was not included in the final version. Additionally, Metal Gear Solid: Portable Ops, features many instances of the main character undergoing interrogation, though none of these are interactive. Despite a similar button-prompt sequence appearing in Metal Gear Solid 4: Guns of the Patriots, it does not involve any interrogation on the main character, although it did feature a similar action in the ending of Act 3, where Liquid Ocelot managed to parry Snake's stun knife and stab his hand with it, and proceeded to humilate him. Interrogation sequences usually happen once before the player escapes or the scene progresses, with Metal Gear Solid, its remake The Twin Snakes, and Peace Walker being the exceptions, often having more than one consecutive torture sequence.

During the torture sequence in Metal Gear Solid 3, Naked Snake was wearing a plastic bag over his head. This was a reference to a common form of torture used by the KGB in the Soviet Union as well as the STB in Czechoslovokia. According to the director's commentary, the production team wanted to make it as realistic as possible, but the limits in motion capturing capabilities prevented them from getting further than the wearing of the bag itself and binding the person's arms by the ropes. Also, the motion capture team captured Snake's breathing while wearing the bag by placing the bag over someone and attaching a microphone to it, and used several different types of plastic bags to find out which gave off the best sound quality. In the end, a garbage bag designated by the Tokyo City sanitation department was decided to be such.

In the Japanese version of Peace Walker, because of censorship laws in Japan regarding the depiction of torture to the target audience, the torture sequence was modified to have Dr. Strangelove "tickle" Big Boss via "Laughing Rods," with it also being lethal if done at a high frequency, with future references to the torture also being omitted. The torture is kept as it was originally intended for international releases, however. If the player is playing the "Escape from the Prison" Main Ops level in CO-OPS mode, one of his/her partners can, after escaping, also access a monitoring station in the prison facility and use some buttons to adjust the electrical output to make the torture slightly easier for the one still stuck inside the cell.

Similar to Metal Gear Solid 4, Metal Gear Rising: Revengeance lacks an actual interrogation of the player, although it does have the player entering a mandatory fight with three cyborg soldiers while rendered emotionally unstable by Samuel Rodrigues' words to Raiden earlier, and thus under a significant handicap, before Sam comes out to observe the fight and question Raiden's resolve before Raiden replies by cursing at Sam.

Interrogation by the player
The Truth Gas item in Snake's Revenge can be used by the player to interrogate enemy officers in the game. Interrogating officers helps to increase Solid Snake's rank, and by consequence the size of his Life gauge and item carrying capacity.

The gameplay element of interrogation returned in Metal Gear Solid 3 as a component of CQC. In order to perform an interrogation, the player has to grab the opponent, and then press the action button while holding down the left shoulder button to have Snake start interrogating the soldier. The interrogation responses vary from: giving info about the location, the amount of soldiers present, or targets that can be destroyed; giving gameplay hints; requesting to be spared; demanding that they be killed; or even insulting the player. Afterwards, the player has the choice of either letting them go, throwing them to the ground, or slitting the throat. Some of the soldiers can also give out codes relating to Metal Gear Ac!d. If the player performs CQC and interrogates a soldier while playing the Metal Gear Solid: HD Collection version of Metal Gear Solid 3, they will unlock the trophy/achievement "Tell Me Where the Bomb is!", a reference to Jack Bauer's methods of interrogation in the TV drama series 24. Coincidentially, Kiefer Sutherland, the actor who portrayed Bauer, would later act as the motion capture and English voice actor for Big Boss in Metal Gear Solid V: Ground Zeroes and The Phantom Pain.

CQC interrogation reappears in Portable Ops and Peace Walker, this time serving a role in the plot, in which the player must interrogate specific targets to advance in the game (although in Peace Walker, this is relegated to an interactive graphic novel cutscene). Although in Metal Gear Solid 3 and Snake Eater 3D, there is voice acting in regards to the soldiers being interrogated, it is absent in Portable Ops and Peace Walker, with only a grunt or a scream being accompanied with text-dialogue, and in the latter game, eight-bit sound effects to imply speech.

In Portable Ops Plus, soldiers will also give intel about their career. For example, the phrase "There is a faster way to drag soldiers," means that the subject's career is Rescuer.

Jungle

 * "When you walk on moist soil... Your footprints will..."
 * "In the jungle... Ammunition is valuable"

Crocodiles

 * "The crocodiles... are ferocious..."
 * "Crocodiles taste great"
 * "Throw a grenade into a crocodile's mouth"
 * "In the water, the crocodiles are tough..."

Hornets

 * "Watch out for hornets"
 * "There's a hornets nest around here"
 * "I shot down a hornet's nest around here..."
 * "Hornets... They're terrifying"
 * "The north crevice... so many hornets"

Dogs

 * "Dogs.. can't stand crocodiles..."
 * "What dogs really like... is animal meat"
 * "Dogs will pick up your trail... by smell"

Mountains

 * "On the mountains... chocolate chip camouflage would be effective"
 * "On the mountains... rations are... hard to come by"

Vultures

 * "Vultures... They feed on human remains. When you eat a vulture that has fed on a body..."

Scorpions

 * "Scorpions... they have lethal poison"
 * "If you get stung by a scorpion... use serum"

All areas

 * "Shooting Kerotan will..."
 * "Up ahead... Our numbers are strong..."
 * "Plants... Last a long time..."
 * "Fish... rots quickly..."
 * "Meat... tastes good... but rots soon"
 * "Fruit... is easy to get"
 * "Eat rotten food... stomach ache"
 * "Rations... don't go bad"
 * "Under the bed..."
 * "If the provisions storehouse is destroyed..."
 * "If you destroy the armory..."
 * "The armory... can be destroyed with TNT"
 * "In the provisions storehouse... there’s some good eats... a bunch!"
 * "In the darkness... If you light a cigar"

Dremuchij

 * "If you climb trees, there's fruit"
 * "Inside fallen trees..."
 * "At night, poisonous animals will..."
 * "In the south, the bottomless swamp..."

Dolinovodno

 * "If you fall off the rope bridge... you’re finished..."
 * "Under the rope bridge... Flatten yourself against the cliff wall, and proceed"

Rassvet

 * "We've got some guys in the grass"
 * "There are snipers up high.."
 * "In the swamp... Traps"
 * "Beyond the Swamp, there are mines"

Bolshaya Past South

 * "There are lots of traps around here..."
 * "Beyond the Swamp, there are mines"
 * "Watch your feet..."

Bolshaya Past Base

 * "The northeastern gun emplacement... Use the trenches."

Chyornaya Peschera Cave Branch

 * "In caves... Torches"

Exterior

 * "Get into the warehouse... from the stairs on the right."

Interior

 * "A little further ahead, the forest... is deadly"

Outside walls

 * "This facility... It used to be a cell"
 * "To open the door, you could call over someone with a key Soldiers with key... They should be just inside the door. To call a key holding soldier over, the CQC can be used to knock"
 * "Hidden by Grass... A hole in the wall"

Inside walls

 * "To the northeast... In the armory... There’s some ammo..."
 * "Under the truck... There’s some ammo..."
 * "From the Balcony... you can get out"

B1 East

 * "In this area, there is LIFE Medicine"
 * "The isolation cell guard... What an idiot"

B1 West

 * "The lab chief's room... is the furthest back"

Overall

 * The lab... it has two floors above ground... and one below"
 * "The chief's room... it's underground"
 * "If you're hungry... maybe you should try the second floor On the Second Floor... There’s some rations"
 * "If you can get down the northeast stairs... you'll find the jail"
 * "How about going to the toilet... relaxing a bit?"
 * "The open ceiling 2nd floor... hang..."
 * "Trying to Escape... You'll get put in an isolation cell"
 * "From the courtyard... you can jump down to the first floor"

East

 * "If you climb the tree behind the hut..."
 * "TNT, under the bed"
 * "A good sniping point... Up from the cliffs"

West

 * "Watch your feet... this area has traps"
 * "If you travel along the east wall"
 * "I don't know much about what’s north of here... It's out of my jurisdiction"

South

 * "To the west... an armory"

Overall

 * "Snipers are hanging out up high"
 * "Snipers like the grass"
 * "This place... gets a lot of rain"

Mountainside

 * "Inside the bunker... an item"
 * "The provisions storehouse... on the roof"

Mountaintop

 * "In the air raid shelter... a way out"
 * "Getting into the underground shelter, without a key..."

Groznyj Grad

 * "This area is huge"
 * "The armory... northwest"
 * "In the back of the armored truck"
 * "If you travel along the ditch..."
 * "Using the ducts... you can move safely"
 * "The Cell... to the east"
 * "The Provisions storehouse... Northeast"
 * "To the weapons lab main wing, they're a truck carry goods"

Sokolov

 * "We won't hand over Sokolov!"

Ocelot

 * "The Major He's looking for you"
 * "Major, He'll have his revenge"
 * "The Major would never lose to you!"
 * "That time... if only those hornets hadn't come"
 * "The Ocelot Commander... He likes quick draw gun duels..
 * "The north crevice... so many hornets"
 * "His revolver... reloading can be..."
 * "The Ocelot commander... He takes good care of his hat"

The Fear

 * "The fear... comes to eat... even spoiled and rotten food"

Flying Platforms

 * "Directly under the flying platform... Is it's blind spot"
 * "The flying platform's weakness... is its engine."
 * "The flying platform searchlights can be broken"

Soldiers

 * "A lot of us, we can’t swim."
 * "If our Radios are taken out... Our Contact Will..."
 * "The Others... If you want to learn more, take a look at the Survival Viewer Map For details... Look at the Survival Viewer Map"
 * "After taking us out... leaving us alone will..."
 * "There are guys who know alert cancellation frequencies"
 * "Listening to the radio can be relaxing..."
 * "If our radio man is taken out... Contact will be..."
 * "One punch... to the groin"
 * "If right hand gets shot.. the gun"
 * "Even threatening... won't show their dog tags"

Scientists

 * "The Scientists... We don't get along."

Helicopter

 * "Helicopters... also if you have an RPG"

Raikov

 * "Water... The Colonel is weak against water."
 * "The Colonel... He has problems with bright mushrooms..."
 * "April...30th..."
 * "We'll tell them everything... together."
 * "Today... is the day I met you."
 * "No, never heard that name before."

EVA

 * And then... when I was 17... ...35...26...34... ...Up up down down left right left right... I don't remember the rest... Instant noodles...

Soldier responses

 * "I'm not talkin'..."
 * "I... Don't Know Anything..."
 * "I... Don't have anything..."
 * "You... Stinking American!"
 * "...you imperialist pig...!"
 * "You lousy... !"
 * "Bastard!"
 * "Just try and kill me"
 * "I'll Never conform... to the west"
 * "You... do have freedom?"
 * "The freedom of the west... Is it really all that good?"

Scientist responses

 * ""
 * "They... They are forcing me to work here..."
 * "Even in our country... We can research as we please"

Play tips

 * "During Polygon Demos... Zoom with the action button"
 * "On the radio screen... Hold down the action button to..."
 * "When "R1" is displayed in the polygon demo, press the first person view button to..."
 * "The Machine Gun... with the action button..."
 * "If you stay low... you're hard to spot"
 * "By Stalking... You can find trap indicators"

Weapons

 * "In this area... There's a weapon"
 * "In the armory... There's an SVD"
 * "Grenades... Lying down will..."
 * "When throwing a grenade... If shot..."
 * "Guns can be fired... Even in water"

Camouflage

 * "In the water, water camouflage is most effective"

Traps

 * "Pass wire traps... by crawling"
 * "Shooting drums will..."
 * "If you shoot the barbed wire fence power source..."

Very Easy/Easy

 * "ACID Password: V-I-P-E-R"

Normal

 * "ACID Password: J-E-H-U-T-Y"

Hard

 * "ACID Password: X-M-E-I-G-H-T"

Extreme/European Extreme

 * "ACID Password: M-I-K-A"

Government official

 * "The warheads were brought to the silo located east of the ravine!"
 * "The guest house? It's across the rail bridge, near the sea."
 * ""A man with a revolver?" Yeah, he did talk to me. He mentioned a friend at the airport..."
 * "Who do you think you are!? Let me go!" (first time)
 * "Check the lockers at the security base... There's a radio frequency written there." (second)

Soviet officer

 * "They... They took some guy named Snake over to the guest house!"
 * "That reminds me. I saw a man twirling a revolver around in the urban zone..."

FOX soldier

 * "141.23..."

Soviet soldier

 * "The frequency... is 145.61!"
 * "14002..."
 * "14678..."

Other

 * "H-help meee!"
 * "Please don't kill me..."
 * "Kill me..."

Career-related

 * "There is faster way to drag soldiers"

Vladimir Zadornov

 * "The butt... is another weak point.

Kazuhira Miller
The Japanese version of this line's translation was closer to "I'm not hiding anything!"
 * "No skeletons in my...closet."

Main game

 * There are guys posted at these positions...
 * I told you all I know. Lemme go!
 * Those XOF guys... always hang around the admin building.
 * That was everything I know. What are you waiting for?!
 * You won't get past... these surveillance cameras...
 * You'll find some ammo here.
 * I don't know any more. Please, don't kill me!

Glaz

 * Are you... a phantom too...?

Palitz

 * A phantom comes...

Déjà Vu

 * You'll find a... cassette tape here.
 * You looking for the marking I saw here...?
 * The admin building's lights are controlled by the power system located here...
 * I'll tell you where the armored vehicles are...
 * I'll tell you where the prisoners are.
 * The surveillance camera is... in front of the admin gate.
 * You need a handgun, try here.
 * There's a submachine gun here.
 * They brought in some new weaponry. This is where it is.
 * They took a prisoner to the basement of the admin building. The boiler room.
 * There's a... non-lethal weapon here.
 * There are some... directional mines here.