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''King's Quest III: To Heir is Human'' is the third game in the ''VideoGame/KingsQuest'' series. It is the first game where you play as someone other than King Graham of Daventry. It is famous for its particularly brutal CopyProtection.

In the game, you are Gwydion, the slave of the evil sorcerer Manannan; you cook and clean for him, but long for freedom. One day, Manannan decides to go on a journey, and the race is on-- you now have the ability to explore the land of Llewdor and find a way to escape the evil man. But escape is only part of the adventure-- you also have a burning desire to find out who you are, where you came from, and how you can get home...

This story seems unconnected to the earlier two ''King's Quest'' games. Gwydion has no obvious link to the royal family of Daventry, and people initially disliked this game because of it. The connection between games is revealed only at the end of the first act, [[LateArrivalSpoiler and if you've played the later games, you know what it is already.]]

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!!This game provides examples of:
* AcCENTUpontheWrongSylLABle: The AGD version pronounces his name as a dactyl ("MAN-an-an") yet KingsQuestV had Mordack pronounce it as an amphibrach ("ma-NAN-an").
* AdultFear: Graham paralyzed by grief. His son was kidnapped from his cradle and enslaved by his enemies ''somewhere,'' his kingdom has been burnt to cinders by a dragon that his best efforts cannot defeat with innocents suffering and dying on his watch...and then his only remaining child offers herself up as a HumanSacrifice. The canonical game doesn't play it up, but the FanRemake games and FanSequel ''VideoGame/TheSilverLining'' don't make an attempt to downplay it.
* AllThereInTheManual: All the spell formulae.
* BalefulPolymorph: If you mess up even once while casting the spells, [[NonstandardGameOver you can turn into some horrible creature]] as some of the possible backfires. Also, [[spoiler:this is what the cat cookie does to Manannan]].
** And by "mess up", we mean ''misspell a single word''. Thankfully the parser ignores any and all punctuation, and none of the spells involve words that are spelled differently in British English than in American English.
*** Hell, if you simply enter the page screen and leave, it counts as a botched transformation.
* BigfootSasquatchAndYeti
* BlackCloak: Manannan wears one. He's also linked via later game to the Black Cloak Society (he personally is not linked, but his brother is indirectly to Abdul Alhazred), which may or may not be a LegionOfDoom. Several fan games link him directly.
* CameraScrew: When walking down the mountain, your view is obscured by rocks and you have to guess where the path is.
* CantGetAwayWithNuthin: The wizard has the nasty habit of punishing you for arbitrary reasons. More importantly, if you happen to carry any magical components, including such innocuous items as a fly's wings or a cat's fur, [[spoiler:or have misplaced the magic wand]], he will kill you instead. ZAP!
** The innocuous items punishment is justified, however: Manannan might have raised you from childhood, but he's not been nice about it, and he's absolutely ''paranoid'' that you might learn to do something about that before he can find another child to raise (at which point he'll kill you).
** And Gwydion is far from Manannan's first child slave, and according to a [[ApocalypticLog diary]] in the AGD remake, not the first to attempt using the wizard's own spells against him. No doubt he's become DangerouslyGenreSavvy over the years.
* CatsAreMean: The black cat in the wizard's house really hates Gwydion and can even kill him if he's not careful! [[spoiler: Also, you defeat Manannan by turning him into an obviously mean-tempered cat.]]
* ContinuityNod: In the AGD remake the teleport effect you get when using the magic map is the exact same as with the magic map in ''[[VideoGame/KingsQuestVIHeirTodayGoneTomorrow King's Quest VI]]''. Even the same line "Alexander feels a strange pulling sensation" is used.
* CopyProtection: An infamous case--you need the manual to cast the spells, and you have to cast them exactly as they are in the book. The spells are very complex and one typo will have you dying. Oh, and you absolutely have to cast several of the spells to beat the game. As if that wasn't enough, in the original packaging the spells in the manual were written to look like flowy handwriting, which could make them difficult to read. In the freeware remakes, there is [[CaptainObvious obviously]] no need for copy protection spellcasting, so spellcasting is heavily simplified in one and the other has the instructions on screen instead of requiring a manual.
* CoolAndUnusualPunishment: Manannan's idea of punishing Gwydion is to force him to do the [[Music/VillagePeople Y.M.C.A. dance]].
* CreepyChangingPainting: In the AGD version, if you talk to the painting of Manannan.
---> Narrator: If he could talk he'd probably be politer than the real thing.
---> Manannan(!)Painting: Don't count on it! (Keep in mind the painting is [[TheFourthWallWillNotProtectYou talking to the player, not Gwydion]])
* DidNotThinkThisThrough: If Manannan kidnapped Gwydion as a baby, then he would have to deal with a crying infant and changing diapers for a long time. The manual handwaves this by stating the wizard would summon spirits to do that for him, but none of the spirits are seen or mentioned in-game.
** By the time Gwydion is reasonably grown, Manannan no longer needs the spirits to help deal with this. Still, it would have been interesting to see at least one of them in game.
** This is justified, that the manual states the summoned spirits are natural pranksters, which Manannan wants nothing to do with. This is one of the two reasons why he simply doesn't use the spirits as his slaves, instead of a human child. He prefers oppressing children and forcing them into hard work and toil, and possibly he actually [[ForTheEvulz enjoys killing his mortal slaves]]
* DigitalPiracyIsEvil: That so many people remember being frustrated by this game is a sign of how widespread piracy was even back then: the game is ''remarkably'' easy if you have the actual game manual which contains the spell formulae. Gathering the ingredients and casting the spells covers about two-thirds of the game. There is actually a debate on if the manual was intended as copy protection, but rather a feature, as at least two hintbooks reprinted the manual in complete form including page numbers (with one only leaving out a couple of optional counter spell phrases), and KQ3 had its own software based copy protection on the disk itself..
* DespairEventHorizon: The Oracle explains that Graham has passed this due to [[spoiler: Rosella being chosen as a HumanSacrifice]], which is why he cannot fight the dragon.
* DistinguishingMark: Gwydion has one that shows [[spoiler:he's Prince Alexander of Daventry]]. That's on his ''backside'', mind. Which [[spoiler:his sister Rosella]] asks he reveal as proof. The AGD fan remake has him {{Deadpan Snark|er}} that he hopes [[spoiler:the entire kingdom]] won't ask him to prove himself the same way.
* DoesNotLikeMen: Smaude in the AGD Remake, due to having little experience with anything other than the bandits and pirates that frequent the nearby city. Gwydion can change her mind if he passes her tests.
* DropInNemesis: Manannan will use any excuse he can to appear out of nowhere, and either torment you for not performing your tasks, or just flat out kill you on the spot for doing something that might be a threat to him. Finally getting rid of him feels ''really'' good.
* EasterEgg: A GREAT one in the AGD version. If you search Manannan's desk 4 times. You find a very interesting letter to Manannan from [[spoiler: Lolotte]]
* [[ThreateningShark Everything's Even Worse With Sharks]]: A shark appears by the beach.
* EvilLaugh[=/=]EvilGloating: AGD's remake has ''Gwydion'' pulling this off pretty well. The former when he gets hair from the cat while able to understand animals, and the latter when he [[spoiler:gives Manannan the cat cookie]].
* EvilSorcerer: Manannan.
* FairyTale: Typical of the franchise
* FanRemake[=/=]VideoGameRemake: Three of them. Creator/CrystalShard started one with the original graphics and a fleshed out plot; Creator/InfamousAdventures created one with better graphics and the original plot. Creator/AGDInteractive announced one with better graphics and some tie-ins to their ''[[VideoGame/KingsQuestIIRomancingTheThrone King's Quest II]]'' remake. The former has been aborted, the second is complete, the last came out early 2011.
* FantasyKitchenSink: The Three Bears, Medusa, pirates and a three-headed dragon.
* ForTheEvulz: Manannan's motivation for kidnapping and punishing you.
** Though the King's Quest Companion, and Sierra's King's Questioms state that he was the brother of Hagatha (The BigBad from the [[Videogame/KingsQuestII previous game]]) and suggests he kidnapped [[spoiler: Alexander]] specifically to get revenge on King Graham.
** The AGD remake, has a interesting conversation between two hens about a male hen whom Manannan transformed into a fox. As a fox he wants to continue being their friend, while at the same time [[TheMindIsAPlaythingOfTheBody resisting the urge to devour them]], there is literally nothing Manannan would gain from this, aside from this trope.
* HistoryRepeats: In the AGD remake, it turns out Alexander was not the first Gwydion. In fact, it's heavily implied through his predecessor's journal and talking to NPC's, that the last Gwydion went on the same adventure, doing most of the same things, with the same goal. The difference? The last Gwydion ran out of time before he could find the final Cat Cookie ingredient.
* HoistByHisOwnPetard: The only way to defeat Manannan is to make him have a taste of his own remedy.
** In the ExpandedUniverse material, the cat he keeps was a rival of his, and he's done this more than once.
*** There had been rumours that went as far to say that the cat was in fact his former wife with whom their relationship fell apart.
*** Yet ANOTHER rumour is that the cat is a "Previous Gwydion" whom Manannan transformed and [[MindRape rewrote his memories]] into being evil and obedient. If that's true, the fact the cat hates your guts and literally tries to sabotage you. Despite actually being kindred spirits, is beyond tragic.
* HumanSacrifice: Rosella. It's up to you to get her out.
* InUniverseGameClock: You only have about 20 minutes to explore the land before Manannan returns. If he catches you outside (or if you forgot to re-hide the secret chamber), then he punishes you. Fortunately, he leaves after a while and you can explore some more. You also have to time yourself so you reach the pirate ship in time, and the once on the ship, you have to wait until they spot land. In the later part of the game, the clock is much less important.
** You also have to complete the wizard's tasks within (entirely reasonable) time limits, or he punishes you non-fatally. Unfortunately, the wizard's tasks are randomly assigned: you can waste ten to fifteen minutes waiting for him to announce he's going on a trip (for fifteen minutes), which is the only time you have to gather spell components and cast spells. The pirate ship leaves port twenty minutes after a certain event in the game that may happen before you rid yourself of the wizard. Hope you can get that done quick!
* IneptMage: Gwydion, unless you help him master the goddamn spells.
* InvoluntaryDance: One of the punishments Manannan can inflict on Gwydion, as listed in CoolAndUnusualPunishment above.
* JumpScare: Depending on how desensitized you are to the format. In all versions, Manannan will appear the hell out of nowhere. Yet the first game, he appears very slowly and his leitmotif plays to announce his arrival. While in the AGD remake, he appears instantly with more subtle music, yet the game warns you beforehand when he'll be arriving.
** In the AGD version talking to the portrait of Manannan will take many a player by surprise.
* LateArrivalSpoiler: [[spoiler:Gwydion is Prince Alexander.]] It is referenced many times in all of the later games. This reveal is very easy to miss in this game itself. This spoiler caused massive backlash against Sierra On-Line when the game was first published: the previous two games had involved the adventure's of Graham, and the third game introduces both a new protagonist and a new land, both of which are completely unconnected to the first two games. Fans cried RuinedForever, and many of them were angry with the creators.[[spoiler: ..until they got to the reveal.]]
* MagicMap: When Gwydion first finds it, the map is completely blank. As he explores Llewdor, though, the map lights up and he can quick travel to that location. Even more than that, when he is both on the pirate ship and the coast of Daventry, the map updates so that it reflects the new region.
* MeaningfulName: Llewdor sounds a lot like Looter. Not only do you loot Manannan's house, and the Three Bears house, and the thieves hideout, but Llewdor itself is a WretchedHive for Bandits and Pirates.
* MosesInTheBullrushes: Gwydion is actually [[spoiler:Prince Alexander, Graham's son, who was stolen from the family when he was an infant]].
* NintendoHard: Even compared to the other games in the series with the overabundance of {{Moon Logic Puzzle}}s and [[YetAnotherStupidDeath stupid deaths]], the addition of a time limit in the first half of the game forces the player to keep a very strict schedule in gathering everything they need to thwart Manannan, not to mention the CopyProtection puzzle listed above. The AGD remake is far more forgiving in both these aspects.
* OnlyTheWorthyMayPass: In AGD's remake, Smaude/Medusa makes Gwydion answer questions to test his personality to see if he's worthy of not being turned to stone. Later on the ghost of the Pirate Captain who buried the treasure then makes you pick up items according to their true value in order to deserve the booty.
* PixelHunt: One of the ingredients you have to collect for a spell is a snake skin. It is a brown squiggle in the desert--where, incidentally, there are hundreds of other brown squiggles. Happy hunting!
* PointAndClickMap: Well, move-cursor-with-arrow-keys-and-press-enter map, anyway. Unique in that the map is an (optional) actual item that must be found, rather than just a feature of the interface like most other examples of this trope.
** A gag in the AGD remake has a pirate going through your belongings, who finds the map, points out Llewdor to the captain, and gets whisked away back to the town.
* PointOfNoReturn: Once you're on the ship, that's it. Hope you got everything you needed back in Llewdor.
** And again, once you're off the ship, and at various points in the mountains. These are less crucial, though.
* RealMenWearPink: Or at least sleep in a big fluffy pink canopy bed.
* RewardedAsATraitorDeserves: In the Creator/InfamousAdventures remake, a maid [[spoiler:from Castle Daventry]] is the one who delivers Manannan's latest slave to him. She asks him for her reward, and he gives it in the form of [[DisintegratorRay a free cremation ceremony]].
* SaveThePrincess: The oracle has just dropped a few bombshells. Massive three headed dragon attacking the faraway land of Daventry, the princess is being sent as a HumanSacrifice. Even better, kid, [[spoiler: she's your twin sister]]. The ship at the dock is headed that direction. What are you waiting for?!
* SequelDifficultyDrop: Not the original game, which is very much NintendoHard and a massive DifficultySpike, but the AGD remake made some of the more frustrating mechanics more forgiving. Items that Manannan will kill you for having glow blue in your inventory, the timer is color-coded to let you know how close he is to returning/waking up when he leaves/takes a nap, and the CopyProtection puzzle is limited to your standard icon commands (with the instructions right in front of you in-game) instead of having to type it all up from your manual without even a single typo. However, it's still very difficult and tense.
* ShoutOut: The last part of the game takes place in the area of ''VideoGame/KingsQuestIQuestForTheCrown''.
** The Jaws theme plays when the shark appears.
** The Gnome whistles the Smurfs theme.
** In the AGD remake, the music that plays when you die by falling sounds like the end of the ''InspectorGadget'' theme song.
** The AGD remake also references the "A Pirate I Was Meant to Be" song from ''VideoGame/TheCurseOfMonkeyIsland'' if Alexander tries to "talk" to a Jolly Roger flag.
** In the IA remake the two lizards do a variation of Cheech and Chongs Santa Claus routine.
* SmoochOfVictory: From your sister. [[BrotherSisterIncest Ew, not like that, you pervert.]]
** It's a kiss on the cheek. Still, the embarrassing "proof of identification" (a birthmark on his bum) more than makes up for it. Yes, you end up mooning your sister...
* StaircaseTumble: Careful on those stairs leading down to the wizard's secret workshop in the basement. Sometimes the wizard's cat will sit on the steps, causing you to trip over it and go flying.
** To twist the wound further, there is a chance you could trip over the cat, while Manannan appears right in time to watch you die.
* TalkingAnimal: Justified, as one of the spell recipes gives Gwydion the ability to understand the language of the animals. He can't talk to them, however.
* ThreateningShark: Annoy the pirates, and you're thrown overboard as shark food. Jump overboard at Daventry's coast, and you'll have to dodge one.
* TimedMission: You have to hide your stuff before the wizard returns. You also have to catch the ship before it leaves. There is a timer specifically for this purpose: when someone tells you that you have X minutes to do something, make a note, and be ready for when that time comes up.
* {{Unwinnable}}: Many, this being a Sierra game, but of note is the fact that you will never progress to the second half of the game if you don't have the manual with all the spells in it.
* VideogameCrueltyPotential: You can kick Manannan's cat. Gwydion even gets a chuckle out of it.
* WhatHappenedToTheMouse: Graham is supposed to have a magical shield that makes him invulnerable, as one of the treasures from the first game. So why exactly doesn't he use that against the dragon?
** In King's Quest 1', Dragon fire is one of the few things the shield is not immune to, leading to a toasty end for Graham.
** Just because he has a defense against the dragon doesn't mean he has any weaponry capable of a counterattack. In addition, the loss of his infant son and the appearance of the dragon have driven him into deep depression, preventing him from mustering up the courage to act.
** What happened to Manannan's cat? Are we to simply assume he starved to death alone in the house? The King's Quest Companion suggests that nothing was alive when Derek Karlavaegen moved in. He found no evidence of Manannan.
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