----
* ActorAllusion:
** Para-Medic calls Snake "a real Captain Nemo" after he states that his name is John Doe. Creator/AkioOhtsuka, the Japanese voice actor of Snake, had previously voiced Captain Nemo in the anime series, ''Anime/NadiaTheSecretOfBlueWater''.
** Likewise, Volgin shares some traits with Raoh, including unusual powers and being military dictators. Both Volgin and Raoh were voiced by Creator/KenjiUtsumi. Also, this isn't the only time Utsumi plays [[Manga/DragonBall a tyrannical leader of an army with the word "Red" and "Army" in it.]]
** And furthermore, for the Japanese version of the game at least, the comical NonStandardGameOver messages from Colonel Campbell (when he berates you for creating a TimeParadox via killing Ocelot, EVA or Sokolov) is an allusion to Creator/TakeshiAono voicing Doc Emmett Brown in the Japanese dub of the ''Film/BackToTheFuture'' movies.
* ArtisticLicenseBiology: The Pain doesn't seem that sure if his pets are bees or hornets. The two species don't exactly get along. Unless the strangled cry of "my HORNETS!" [[UnusualEuphemism refers to something else altogether]].
** There's also plenty of made up plants and animals: For example, there's no such thing as a Baltic Hornet (hornets can't make honey) and there is no golova fruit (although, it's based off of a real fruit called a jackfruit).
* ArtisticLicenseGeography: Good luck finding any tropical jungles ''anywhere'' in the former Soviet Union, not to mention the ludicrous variety of animals housed in it. The [[JustifiedTrope justification]] is that the animals were brought into the jungle from other regions by the scientists for research purposes, and the jungle setting is there mostly to trick people playing the pre-release demo.
** Despite the game saying it's a "jungle", it looks more like what's called a ''mixed forest'', which the Soviet Union did have, for instance the Caspian Hyrcanian zone in Azerbaijan. Also, there actually are pockets of lush forest right next to arid mountain regions in areas of Tajikistan (where the game is suggested to take place) like the Varzob region. The mountainous areas later in the game also resemble the lower ranges of the Tian Shan mountains in Krygyzistan.
* ArtisticLicenseEconomics: The Philosophers' Legacy consists of enough money to fight the Second World War ''five times over''. The economic repercussions of putting this much money aside and doing little with it, then ''losing'' it, although the next game actually does deal with the economic repercussions somewhat.
* CreatorBacklash: Done to Raiden from the previous game. Zero devotes a long CALL to the fact that the Raiden mask irritates him, and the Raiden mask is used to pose as Raikov, the impulsive, despised and ill-tempered lover of everyone's favourite homicidal lunatic Volgin; Snake beats him up and hides him in a locker, with the option of actually killing him. This pleased Raiden's substantial {{Hatedom}} to no end. [[RescuedFromTheScrappyHeap He got better]].
** In the Secret Theater video ''Metal Gear Raiden: Snake Eraser'', Raiden goes back in time to assassinate Naked Snake/Big Boss and take the Main Character Chair for himself. He ends up, among other things, getting kicked in the face by Naked Snake during the HALO jump, and [[BlackComedyRape is almost raped by Volgin]], mistaking Raiden for Raikov.
** The ''[[VideoGame/MetalGearSolid4GunsOfThePatriots Metal Gear Solid 4]]'' trailer also takes a potshot at Raiden, with the crowd booing heavily when he unmasks himself and his getting royally creamed by Snake during their fight for the main character chair.
* FakeNationality: British-born Neil Ross and American-borns Creator/JimWard and Grant Albercht voiced Russians.
* FanNickname: The river you "fight" The Sorrow in is often called the "River of Sorrow" by fans, for obvious reasons.
** The infamously long ladder climb after the fight with The End is jokingly referred to as the "Ladder Boss".
* HeyItsThatVoice: It seems [[WesternAnimation/FamilyGuy Diane Simmons]] decided to become a reporter in Quahog after Big Boss killed her. Also, Volgin's Japanese voice actor, Creator/KenjiUtsumi, previously voiced Commander Red in ''Manga/DragonBall'' and Raoh in ''[[Manga/FistOfTheNorthStar Hokuto no Ken]]'', making it his third role as a military despot. EVA's voice actress, although her alias names her as Suzetta Miņet, sounds a bit too similar to the voice actress of [[Disney/TheLittleMermaid a certain redhead mermaid in a Disney film]], although some fans think she may have also been Creator/DebiMaeWest even after an in-house interview confirmed that she wasn't Miņet.
** Colonel Volgin, The Fear, and The Pain are voiced by ''G.I. Joe'' veterans Creator/NeilRoss, Creator/MichaelBell, and Creator/GreggBerger, respectively.
** Colonel Campbell's seiyuu provided Dr. Emmett Brown's voice in the Japanese dub of ''Film/BackToTheFuture'', [[ActorAllusion Time Paradox]] indeed.
** The Boss voiced [[WesternAnimation/ToyStory3 Bonnie's mom]] as well.
** Creator/JimWard ([[VideoGame/ResidentEvil4 Jack Krauser]]) may have had a brief stint as a Soviet researcher who developed the Metal Gear weapons line.
** In Japan, [[Creator/KikukoInoue The Boss]] is basically what happens when [[Manga/AhMyGoddess Belldandy]] [[TookALevelInBadass takes massive levels in badass]]
** [[WesternAnimation/AaahhRealMonsters The Gromble]] and [[VideoGame/FinalFantasyX Jecht]] voice The Pain here in English.
** Raikov in English is Franchise/TheFlash, and likewise Ocelot in English is [[WesternAnimation/GreenLanternTheAnimatedSeries Hal Jordan]].
** ''The Fury'' attacks someone he'll ''become'' about [[VideoGame/MetalGearSolid4GunsOfThePatriots fifty years down the line]]. Talk about a mind screw.
** Seems like after he reunited the two worlds, [[Creator/ScottMenville Lloyd]] [[VideoGame/TalesOfSymphonia Irving]] defected to the Soviet Union and became an Ocelot soldier, a scientist ''and'' a radio operator who calls off the [=MiGs=] at the end.
* RecursiveImport: Subverted. ''Metal Gear Solid: Integral'' and ''Metal Gear Solid 2: Substance'' had English voice acting with subtitles for their Japanese releases. However, the ''Subsistence'' edition of this game kept the Japanese voice acting for its native release, but still added all the other extra features from the European version.
* ScrewedByTheLawyers: Why the [[VideoGame/ApeEscape Snake vs. Monkey]] minigame isn't in the 3DS and HD versions. Sony Computer Entertainment created, and owns the rights to ''Ape Escape'', killing any chance the minigame has of being on other consoles by default (though that doesn't quite explain its absence in the {{PlayStation 3}} and [[PlayStationVita Vita]] versions, except [[TheyJustDidntCare not wanting to bother putting extra effort into one version]]).
* ThrowItIn: Kojima wanted to use a piece of licensed music for the closing credits, and a colleague of his suggested he listen to the band stellastarr*. He misheard this as "Starsailor", and liked the track "Way to Fall", which ended up being used.
* WhatCouldHaveBeen
** Related to the above, the credits theme was originally planned to be Music/DavidBowie's "Space Oddity" and "Ashes to Ashes" when space development was originally one of the game's main themes.
** As the player goes through the game, Snake's injuries were supposed to leave visible scars on him, but the {{PlayStation 2}}'s hardware capabilities were unable to handle this feature.
** During the torture sequence, there was going to be various button prompts that would have Snake struggle and swear, but the concept was ultimately cut.
** Kojima and Creator/AkioOhtsuka proposed the idea of having the game be voiced in ''Russian''. By the ''Japanese voice cast''. Ohtsuka was so enthusiastic about the idea, he went for Russian lessons. The rest of the cast shot them down.
** ''The Naked Sample'' tech demo for the [=3DS=] showcased some significantly improved graphics, an updated sneaking suit design, and new set-pieces showing off the 3D capabilities of the [=3DS=] hardware. Unfortunately, the actual ''Snake Eater 3D'' is more of a straight port with updated textures and added game mechanics from ''Metal Gear Solid 4'' and ''Peace Walker''.
** The game was originally meant to be a {{PlayStation 3}} title, but it was released for the [=PS2=] instead when the former's development took longer than expected.

----