''Les Liaisons dangereuses'' is an 18th century EpistolaryNovel by Pierre Choderlos de Laclos, adapted as a stage play by the same name and as the 1988 film ''Dangerous Liaisons''. It was adapted the very next year as the film ''Valmont'' and later updated in 1999 to a modern high school as ''CruelIntentions''; in 2003 another modern-dress (late 1950's/early 1960's) adaptation was filmed as a miniseries for French TV starring Catherine Deneuve and LeeleeSobieski.

The story follows wealthy aristocrats engaged in a malicious bet involving sexual conquests, revenge, manipulation, seduction, and love in the sophisticated, and decadent atmosphere of 18th century French high society.
----
!!Tropes used in ''Dangerous Liaisons'':

* AddedAlliterativeAppeal: The main characters are the Vicomte de Valmont and the Marquise de Merteuil.
* AllWomenArePrudes: Zig-zagged- it's implied that all the "virtuous" women are at best indifferent, but Tourvel is something of a grey area.
* ArrangedMarriage: Cecile's mother has one planned for her.
* TheBet
* BitchInSheepsClothing: Merteuil.
* BreakTheHaughty: [[spoiler:Merteuil in the end.]]
* ByronicHero: Tourvel and Volanges certainly consider Valmont to be this
* ConvenientMiscarriage: [[spoiler: Cecile's.]]
* CorruptTheCutie: Cecile.
* CostumePorn
* CryForTheDevil: Merteuil's ultimate fate is somewhat of an overkill.
* DeathByDespair: [[spoiler: Tourvel]]
* DeathEqualsRedemption: It's only [[spoiler: as he's dying that Valmont does something good.]]
* DoubleStandard: The novel makes much of the inherent unfairness in the way women's and men's reputations are affected by sexual rumors.
* DoNotDoThisCoolThing: As much as you are ''supposed'' to see these pompous, virgin-corrupting, manipulative sex addicts as the bad guys... you can't help but admire them and perhaps even subconsciously absorb a little of their experience in the love game.
** MoralGuardians have been accusing the author's intent of being this since the book was published.
* DuelOfSeduction
* DuelToTheDeath
* EpistolaryNovel: Though the film has the characters meeting and discussing things they write in the book, it still retains a lot of letter writing. Often with original substitutes for a desk.
* ExactWords: Valmont is very fond of those, finding pleasure and amusement in his own duplicity, like when he tells Tourvel she "would think less of him if she knew his motives." Taken Up To Eleven in his best letter, written in bed, on another lover's bare back, and composed in its entirety of sentences alluding to that fact.
* IncorruptiblePurePureness: Merteuil fakes this extremely well, pretty much out of necessity. (Keeping up a not just good but absolutely unassailable reputation is the only way to ensure that anyone spreading rumors about what she's ''really'' up to won't be believed.)
* IdleRich: Virtually all of the cast.
* TheIngenue: Cecile. So very much.
* IronicEcho: After succeeding in [[spoiler: sleeping with Madame de Tourvel]], Valmont says that his infatuation with her is temporarily "beyond his control." This is the same phrase Merteuil uses when telling her IHaveThisFriend story, which ultimately leads to [[spoiler: his dumping Tourvel and his doom]].
* LiteraryAgentHypothesis: Laclos uses the framing device that he discovered the journals and is publishing them, and comments on how MoralGuardians likely object but he is publishing them for a moral purpose (namely that people like Valmont and Merteuil are [[DoNotDoThisCoolThing bad and others should avoid being taken in by someone like them]])
* LadykillerInLove: Valmont, though he is so jaded he doesn't notice he is in love until it's pointed out to him.
* LipstickAndLoadMontage: The opening credits to the film has a montage featuring both the main male and female characters. It looks like they are dressing for battle, and [[TheRenaissance they were]].
* ManipulativeBastard: Valmont but especially Merteuil, the TropeCodifier for ManipulativeBitch. A proto-feminist letter argues that there was no other other way for a woman to get ahead and live the life she wanted in the 18th century. In ''Cruel Intentions'', Catherine argues that she cannot enjoy sex and be considered 'nice' and that this double standard drives ''her'' manipulations. However, this argument is much weaker in ''Cruel Intentions''.
* TheMasochismTango: Valmont and Merteuil [[spoiler: take this to its logical extreme with Valmont's death as a direct result of Merteuil's manipulation of Danceny, shortly followed by Merteuil's humiliation by ''Valmont's'' manipulation of Danceny.]]
* MyEyesAreUpHere: In one of the first scenes of the movie, when Valmont meets Cecile. Whenever he isn't talking, he's very openly staring at Cecile's chest. Needless to say, it makes her mother uncomfortable.
* NatureAdoresAVirgin: Played straight with Madame do Tourvel, inverted with Cecile.
* NotHimself
* NotIfTheyEnjoyedItRationalization: Used by Merteul on Cecile with extreme cruelty when the despairing girl writes to her for help ; earlier, the marquise writes to Valmont claiming that women ''welcome'' sexual violence, as it gives them an excuse in a world where they can't freely succumb to desire.
* ThePornomancer: Averted; the characters spend quite a lot of time on the planning and implementation of a seduction.
* PrivateTutor: Danceny teaches music to Cecile.
* TheQueensLatin
* RecycledInSpace: Besides ''CruelIntentions'', one miniseries set the story in 1960s France and the South Korean film ''Untold Scandal'' transplants the story from 18th Century France to 18th Century Korea. A Chinese adaptation released in 2012 sets the story in 1930s Shanghai.
* SlidingScaleOfShinyVersusGritty
* SnowMeansDeath
* StepfordSmiler: Catherine/de Merteuil is very much type C. She invested a great deal of hard work to become so.
* ThisMeansWar
* TitleDrop
* UnholyMatrimony: Valmont and Merteuil
* TheVamp: Merteuil when around Valmont.
* VillainousBreakdown: [[spoiler: When Merteuil learns of Valmont's death.]]
* [[VillainProtagonist Villain Protagonists]]
* VirginityMakesYouStupid
* WhiteShirtOfDeath
----