* BaseBreaker: Grace in [=GK2=] can be this. While many fans find her gameplay more interesting, there are others who can't stand [[{{Tsundere}} her attitude]].
* BestLevelEver: Le Serpent Rouge in Gabriel Knight 3 is regarded as one of the greatest puzzles in the genre.
* ContestedSequel: Gabriel Knight 3
* [[CrowningMusicOfAwesome Crowning Soundtrack of Awesome]]: Among Sierra's best, including an entire libretto written for ''The Beast Within''.
* EnsembleDarkhorse:
** Grace is arguably more popular than the titular character. The character has her own Wikipedia page while Gabriel doesn't, is PromotedToPlayable in the sequels, and people generally find her parts of [=GK2=] and 3 to be more interesting than Gabriel's.
** Friedrich von Glower is fairly popular with the fans. Mainly because [[spoiler:of his interest to Gabriel.]]
* FirstInstallmentWins: Whilst [[BrokenBase opinion is divided]] as to whether GK 2 or 3 was the worse sequel, it is agreed neither hold a candle to the original.
* FoeYay: [[spoiler:Gabriel and Von Glower]] -- very intentionally too.
* HarsherInHindsight: In ''Sins of the Fathers'', it's possible to have a conversation with the gravedigger where he outlines in graphic detail what would happen to the bodies buried in New Orleans if there was a flood, twelve years before Hurricane Katrina.
** An in-universe example, probably deliberately played up in the 20th anniversary remake, where it's far more pronounced. If Gabriel continues to bug Grace for his messages after she's read them all for him, she'll exclaim in mock melodramatic exasperation "I've given you everything I have!" Funny enough, but if you've played the whole original trilogy and know how their relationship ends up taking its toll on Grace, it's an uncomfortable bit of {{Foreshadowing}} on her part.
* HellIsThatNoise:
** The music at the basement in Chateau de Seres sounded like somebody is screaming.
** Gabriel screams [[spoiler: whenever he falls at the invisible tiles]] towards the end of [=GK3=].
* HilariousInHindsight: In [=GK3=], Larry Chester is writing a manuscript he hopes will introduce [[spoiler: the fact Jesus has descendents]] to mainstream society. He tells Gabe it'll come to light in the next decade. Out of universe, about four years after the game, [[spoiler: Literature/TheDaVinciCode]], a book featuring the same pseudo-history, became a best seller.
* HoYay: plenty in ''The Beast Within''. Specifically, [[spoiler: von Glower's past lovers include Ludwig and von Zell, and he's [[http://www.youtube.com/watch?v=8Us4_nKLd1g&t=3m44s clearly]] interested in Gabriel as well.]]
* MagnificentBastard: [[spoiler: Von Glower.]]
* NightmareFuel: [[spoiler:Wolfgang tears his own heart out so Gabriel can get the Schattenjäger amulet.]]
* NeverLiveItDown. The cat moustache puzzle in [=GK3=]. To this day, many adventure game-related articles such as the infamous [[http://www.oldmanmurray.com/features/77.html rant from Old Man Murray]] tend to use that puzzle as one of the main examples why adventure genre died.
* OohMeAccentsSlipping: Curry actually does a fairly convincing Southern-American accent about 99% of the time, but every once in awhile you'll hear a critical fail that wasn't redone.
** NarmCharm: This actually is probably the only "bad" voice acting in the game, sans the Narrator. When it fails, it's an EpicFail but that's what adds to the charm.
** Curry repeatedly pronounces "New Orleans" as "New Orleens", which is obviously something a true New Orleanian (or someone who's watched ''Series/{{Treme}}'') would never do. One of the few directorial changes to voice acting in the 20th anniversary remake is to have Gabriel pronounce it "N'Awlins"
* ParanoiaFuel: In ''Sins of the Fathers'' once you find out about the Rada Codes. Then you notice the drummers stationed all over the city. You know, the ones you've probably been ignoring because they just sit there all day and drum. [[spoiler:They're not only watching you, they're broadcasting your moves to the creepy voodoo cartel that's already left a number of messy corpses all over the city.]] And of course, the creepy looking guy who just stands outside the shop for two days and stares in the window.
* SpecialEffectFailure: The Beast Within, when it comes to the Werewolves. They are completely computer generated and looked awful(but not in the intended way) when the game was released. The fact that the Normal wolves are depicted via video footage of actual wolves makes the werewolves look even worse by comparison. The damage is limited by the fact the wolf-form werewolves get relatively little screen time until the end.
* TearJerker: [[spoiler: Wolfgang's HeroicSacrifice]] in the first game.
* ThatOnePuzzle:
** In the first game, translating and writing a message in the cemetery certainly does a mention.
** The cat moustache puzzle, as stated above.
* TheyChangedItNowItSucks: Many fans aren't happy with the results in the first game's remake.
* UncannyValley: The character models in [=GK3=] looked awkward and have not aged well even during the game's initial release.
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