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* ActorAllusion: Drebin has [[{{Expy}} too much in common]] with [[VideoGame/DeusEx Smuggler]] for it to be a coincidence: [[Creator/KharyPayton same voice actor]], same appearance and wardrobe, same job description.
** This can also applied to his [[Creator/KeijiFujiwara Japanese voice actor]] since he voiced the Shady Salesman in the Japanese dub of ''VideoGame/RatchetAndClankGoingCommando''.
* AscendedMeme: A few of them in the PS3 Trophies. Including "Hurt Me More!" for electrocuting someone with your stun knife.
* CreatorCameo: Kojima appears in the intro [[https://www.youtube.com/watch?v=93B2Bkw3jew Bomb Shelter Buffet]] TV segment.
* {{Defictionalization}}: Sony released a bluetooth headset styled after Snake's Solid Eye around the game's release, which was even compatible with the game itself and could be used to listen to Codec calls.
* DyeingForYourArt: David Hayter's voice for Snake featured age-based vocal decay, taking the GutturalGrowler trope UpToEleven. It apparently gave him trouble doing Snake's voice in later installments.
* FanNickname: "Movie Gear Solid", for its ''high'' StoryToGameplayRatio.
* HeyItsThatGuy: A somewhat recursive cameo, the intro TV segments include David Hayter being interviewed by Lee Meriwether; both not only play [[AsHimself versions of themselves]] in the clip, but they both star in ''[=MGS4=]'' as Old Snake and [[spoiler:Big Mama/EVA]] respectively.
* HeyItsThatVoice: Since when did [[WesternAnimation/TeenTitans Cyborg]] become a gun launderer?
** More importantly [[ActorAllusion Drebin]] [[{{Expy}} aged rather gracefully]] and goes by the alias "Smuggler" in [[VideoGame/DeusEx 2052]].
* HoYay: Vamp and Raiden in Act 2. Who ''do'' they think they're kidding?
* MemeAcknowledgment: According to Creator/DavidHayter, the voice director on the games brought in ''Franchise/MetalGear [[WebAnimation/AwesomeSeries Awesome]]'' for the cast to watch together during the recording of this game. Following this, Hayter and Creator/{{Egoraptor}} met at Anime Expo. [[http://www.youtube.com/watch?v=v4NJ4KhWQNo This was the result.]]
-->'''Snake:''' Omigod, hotness. I wanna bang you.\\
'''Snake:''' [[ScrewYourself I wanna bang you too]]. Right back at ya.
* TalkingToHimself: Averted. [[spoiler: Big Boss, who is normally voiced by David Hayter, is instead voiced by Richard Doyle in his scene with Old Snake.]]
** Similarly averted in the Japanese version, where [[spoiler: Big Boss, who is normally voiced by Creator/AkioOhtsuka, is instead voiced by his father, Creator/ChikaoOhtsuka.]]
* WhatCouldHaveBeen: The game had a bigger emphasis on the factional warfare between the PMC and whatever rebellion is in the area, and the war aspect was more played up, with the war afflicting the environment - and thus, places to hide, such as tanks blowing out buildings or the vehicle you're hiding in being driven off to fight. Enemies didn't even sound an alert when spotting you - they shouted to inflict Psych damage.
** In an "MGO Eyes" video, it was revealed that ''Metal Gear Online'' had three additional maps that did not make it into the game: the first being "Desert Duel," the second being a remake of the Town stage from ''VideoGame/MetalGearSolidPortableOps'' that was never officially named, and the third is "Lethal Leviathan," which was actually the ship bow of Outer Haven. The first and third were eventually added to the game's arcade version, ''Metal Gear Arcade''.
** Not from the game itself, but there was originally going to be more novels besides the novelization for this game written by Project Itoh, specifically ''Metal Gear Solid 3'' and ''Peace Walker''. Obviously, these plans were dropped as a result of [[AuthorExistenceFailure Project Itoh's death from cancer]].
* WriterRevolt: Originally, Kojima wanted to end the game with Snake and Otacon turning in to authorities only to be executed for being terrorists. His staff flat out refused to work on the game if it was to end that way.
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