* AlternativeCharacterInterpretation: [[spoiler:Did Gray Fox intentionally kill Gustava Heffner? Or was he unware she was there in the first place, or mistook Gustava for Solid Snake?]]
* SugarWiki/AwesomeMusic: [[AwesomeMusic/MetalGear See here]].
* BigLippedAlligatorMoment: While Snake is hiding in the sauna, waiting for Gustava's brooch to change shape, a naked guard enters the sauna, hangs out a little bit, and then leaves. Granted, the guard is probably there to ensure the player keeps Snake in the sauna the right amount of time, but it's still a pretty random moment.[[note]]When the game was officially released in North America, the sprite of the guard was altered so he's now wearing a towel.[[/note]]
* EvenBetterSequel: Or SurprisinglyImprovedSequel for those who weren't impressed by ''VideoGame/{{Metal Gear|1}}''. This game features a more complex plot, better graphics, the introduction of the radar, the ability to crawl, enhanced guard AI, and tons of little details. The improvement is so vast that first time players have been stunned by ''the opening credits sequence''.
* SugarWiki/FunnyMoments:
** In the official translated version of the game, after Holly White informs you she's been captured, she ends her transmission with [[CasualDangerDialog "I'll be waiting!"]]
** The women's restroom where Snake meets Gustava has an elevator that leads to the sewers. Snake only momentarily comments on how odd this actually is.
** The aforementioned [[NakedPeopleAreFunny naked guard]] that enters the sauna while Snake is waiting for the brooch to change shape. Doubly humorous if the player decides to have Snake shoot the guard while exiting.
* GrowingTheBeard: This is where the ''VideoGame/MetalGear'' franchise starts to resemble the ''Metal Gear'' franchise.
* HarsherInHindsight:
** Calling Master Miller during the fight with Big Boss will have him state that Big Boss was a monster. Granted, it's in the context of Big Boss's SuperStrength, but this line becomes significantly harsher after ''VideoGame/MetalGearSolidPeaceWalker'', where he was a former ally of Big Boss and one of the founders of Outer Heaven. Likewise, calling George Kasler during the fight has him mentioning a false rumor that Big Boss has cybernetic limbs to replace the ones he lost during the fight in the previous game. ''VideoGame/MetalGearSolidVThePhantomPain'' revealed that he ''did'' lose an arm and had it replaced with a mechanical one, long before the events of the first game. [[spoiler: Of course, that wasn't actually Big Boss. However, in an almost hilarious turn, the "Big Boss" of the first game, Venom Snake, the BodyDouble, ''did'' have a bionic arm.]]
** Big Boss' parting words to Solid Snake before their final battle now has a rather tragic flavor to them, as they retroactively reflects The Boss' parting words to Naked Snake in ''VideoGame/MetalGearSolid3SnakeEater''. It now shows how Naked Snake at this point in his life has gone full circle as a character and is actively repeating the mistakes of his old mentor:
--->"Whoever wins, our battle does not end. The loser is free from the battlefield, but the winner must remain there and the survivor must live his life as a warrior until he dies."
* HilariousInHindsight:
** A bit of a stretch, but in ''Metal Gear 2'', there were tanks in the hangar (and originally planned to be fought against) that were referred to as Goliaths. The next medium to use the name Goliath in regards to a Main Battle Tank is the TV Drama/TV adaptation ''Series/{{Kings}}''.
** Big Boss's comment about soldiers being dead weight out of the battlefield becomes somewhat hilarious after watching the WebVideo/Mega64 trailer of ''VideoGame/MetalGearRisingRevengeance'', where Raiden bombed at absolutely every single job his unemployment adviser offered him up until getting a job as a cybernetic private military contractor. It also goes int a bit of HarsherInHindsight, as the unemployment manager when first meeting Raiden mentions attributes to Raiden's four year unemployment to being the result of an implied terrible economy (at the time the trailer was released, the American economy, not to mention most of the world wide economy, especially the European economy, was undergoing a severe economic crisis).
* MemeticMutation:
** Snake having to deal with the highly poisonous Zanzibar hamsters. These hamsters, though never again showing up in the series, are frequently used (complete with NotMakingThisUpDisclaimer) to illustrate the absurd nature of TheVerse.
** The phrase "It's not over yet!", used in every ''Metal Gear'' game released after this, excluding the ''VideoGame/MetalGearAcid'' games and ''VideoGame/MetalGearGhostBabel''.
* MostWonderfulSound: That sound that plays whenever you inflict damage on a boss.
* OlderThanTheyThink: A ''lot'' of ''VideoGame/MetalGearSolid'' came from this game, including the bit of using the game's packaging to learn a frequency number.
* TearJerker: Even for an 8-bit game, it has them. The examples would be the deaths of Gustava and Gray Fox:
** Gustava's backstory reveals that she fell in love with a Western man named Frank Hunter, whom she intended to elope with. Unfortunately, she was denied U.S. citizenship, and was outcasted as a result. Her death by Metal Gear D hits Snake hard when he reveals that he didn't want to see a woman die in front of him in ''Metal Gear Solid''.
** For Gray Fox, he's a ShellShockedVeteran who cannot stay away from war as he thought he cannot function outside the battlefield. As the pilot of Metal Gear D, he ended up killing the woman he loved. He thought making a woman happy is something he cannot do. The theme that plays in the conversation between him and Snake is appropriately called "Tears".
* UnfortunateCharacterDesign: The Metal Gear D has a [[GatlingGood rotary cannon]] mounted right between its legs, resulting in many dick jokes.
* UnintentionallyUnsympathetic: Gray Fox for some. While his death scene is tragic, his killing of Gustava ''was'' a KickTheDog moment.
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