''Sir Gawain and the Green Knight'' is a late 14th-century [[HistoryOfEnglish Middle English]] alliterative ChivalricRomance. Set within the KingArthur mythos, this tale revolves around the eponymous Gawain accepting, and completing, a challenge presented by the Green Knight, who mysteriously appeared in Arthur's court during Camelot's New Year's Day feast.

->''Silence fell in hall\\
such wonder for to see,\\
for man and horse and all\\
were green as green could be.''

In the tale, the knight challenges Arthur's court to a game: any of the knights there at the Round Table could strike the Green Knight one blow with an axe. In return, the knight would have to allow the Green Knight a similar blow in one year's time. Arthur's knights, being somewhat GenreSavvy, are hesitant to agree to such an obvious trap. In response, The Green Knight casts aspersions on their manhood and chivalry, which then prompts Gawain to accept the challenge.

[[OffWithHisHead Gawain's axe blow strikes the Green Knight's head clean from his shoulders]]. Surprisingly, the Knight's body remains standing. It retrieves the head, which informs Gawain that he has an appointment at the Green Chapel in one year's time, and exits.

Fast forward to late next year, and Gawain is off on a long and arduous search for the Green Knight's castle. After a long time wandering, and with New Year's fast approaching, Gawain comes to the castle of Lord Bertilak, who cheerfully informs Gawain that the Green Chapel is less than two miles away. Relieved, Gawain accepts Bertilak's offer of hospitality.

Bertilak plans to go on several hunting trips during the week to come, but Gawain is still exhausted from his journey, so they strike a bargain: Bertilak will hand over whatever he catches during the day to Gawain, and Gawain will share "whatever fortune he achieves" in return.

The next day, Bertilak goes hunting. Gawain, sleeping late, finds the beautiful Lady Bertilak [[YourCheatingHeart climbing into bed with him]]. Gawain thinks she is beautiful but only talks with her, nothing more. In the end, Lady Bertilak demands a kiss from him. Gawain heartily agrees, and the two kiss.

At the end of the day, Bertilak offers the deer he killed to Gawain, [[HoYay who repays his host with a kiss]]. Bertilak asks where he won it, but Gawain declines to say.

The next day Lady Bertilak again comes to Gawain, and more directly attempts to seduce him. She plays on his attraction to her, his reputation as a bit of a ladies' man, and his chivalric obligations to his hostess. He resists on all fronts except for two kisses which he and the lady exchange.

The first evening's events are repeated, with Bertilak giving Gawain a boar and Gawain returning two kisses, much to the amusement of Lord Bertilak, who exclaims that Gawain is making an excellent profit off their arrangement.

The third day, New Year's Eve, is like the first two. The Lady has become direct about her intent towards Gawain, who refuses to sleep with her despite his desire for her. The Lady offers to give him a gold ring; Gawain refuses, saying that he has nothing to give in return. Then she offers him her girdle of green silk, which bears a strong enchantment: none who wear it can be killed. This appeals not only to Gawain's romantic feelings toward the Lady, but also to his sense of self-preservation; he accepts that gift.

That evening, Gawain exchanges three kisses for the fox that Bertilak has caught but keeps the girdle a secret, hoping that it will save his life, since he will meet the Green Knight the next day.

On New Year's, Gawain rides to the Green Chapel, refusing to back out of his duty even if it kills him. The Green Knight is happy to see Gawain, and they get down to the axe-hewing.

The Green Knight strikes at Gawain's neck, but pulls the axe away at the last moment when Gawain flinches. He mocks Gawain for his fear. Gawain angrily declares that he will not move an inch. The Green Knight lifts the axe a second time, but he deliberately misses again, much to the frustration of Gawain, who would rather have all of this beheading business over with.

The third strike misses Gawain again, except for a slight scratch on the side of Gawain's neck. The Green Knight then reveals that he is Lord Bertilak, and that the first two misses were in honor of the first two nights of their arrangement, which Gawain met honorably and in full. The third stroke, scratch and all, was for the third day--and the belt which Gawain is wearing, which he tried to keep secret from Bertilak.

The entire arrangement, Lady Bertilak's attempted seduction and all, was part of Morgan le Fay's EvilPlan to embarrass Arthur's court. But instead Gawain had proven himself almost entirely perfect, much to the enchantress's dismay. Gawain keeps the green girdle as a reminder of his cowardice in trying to escape his duty through magic. Bertilak is well pleased with Gawain's performance--his only fault was the desire not to die.

The test of character by "beheading dare" is found earlier in the [[CelticMythology Irish legendary romance]] ''Bricriu's Feast''. ''Gawain and the Green Knight'' was recounted by Thomas Mallory in ''Literature/LeMorteDarthur'' and has been translated by, among others, Creator/JRRTolkien.
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!!Tropes used in this work:

* AnAxeToGrind: Seems to be preferred by the Green Knight.
* ChasteHero: Lady Bertilak tries to seduce Gawain and he refuses... up to a point.
* GenreBlindness: Despite it being the middle of winter, wandering through a desolate forest, Gawain when greeted by a beautiful castle in unseasonable [[ColorCodedForYourConvenience green]] bloom immediately thanks Jesus.
* HonorBeforeReason: The only thing binding Gawain to the agreement is his sense of honor. This is to be expected in a shame culture, where reputation is everything. He turns out to be reasonable enough to [[IDontWantToDie want to keep a silk belt that will stop him from being expectedly killed]], at least.
* ImpossibleTask: The task may not be impossible physically but emotionally: Every human fears death, even if just a little bit.
* IDontWantToDie: Gawain kept a silk belt from Lady Bertilak which she told him would prevent him from dying (despite his agreement with Lord Bertilak implying he should have given it to him), and flinches when the Green Knight is about to execute him.
* KingArthur
* KnightErrant: Gawain during his search for the Green Knight. TropeNamer: The oldest recorded use of the phrase (as "knygt erraunt") is here.
* LosingYourHead: The severing of his own head doesn't trouble the Green Knight all that much.
* MagicKnight: The Green Knight is one. How else would he still be up with his head cut down?
* NiceJobBreakingItHero: King Arthur at the start and Gawain near the end.
* RuleOfThree: Three visits from Lady Bertilak, three kisses, three animals that are hunted (the deer, the boar and the fox), three swings of the axe.
* SecretTestOfCharacter: The feast tests the knighthood and the three days at Bertilak's castle test Gawain. Indeed the entire story is this trope in regards to Gawain's chastity and honor.
* SpoofAesop: What have we learned, Gawain? "Never trust women?" Wrong, try again!
* TwentyFourHourArmor: Gawain sleeps in it while searching the green chapel.
* UrExample: Of KnightErrant.
* TheVamp: Lady Bertilak keeps trying to tempt Gawain and is the one who gives him the girdle that makes him ultimately fail his test (though only by a bit). Gawain claims he has learned never to trust women, that they only lead you to sin, etc. etc. The Green Knight tells him this is ridiculous and that he has to take responsibility for his own failure.
* XanatosGambit: The Green Knight's challenge in Camelot: if they refuse he can call them cowards and if they accept he can humilate (and possibly kill) one of them. The SecretTestOfCharacter interpretation also works here: no matter their response, they will have shown him the nature of their honor.
* AYearAndADay: The amount of time between the two beheadings.
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