* GeniusBonus: Gilgamesh's constant self-aggrandizement, beyond being simply indicative of his universe sized ego, might be a reference to the actual Epic of Gilgamesh, which ''does'', in fact, dedicate entire verses every few chapters to reminding the reader just how ridiculously amazing the main character is.
* GodNeverSaidThat: The final Tiger Dojo states that the player has reached the true end of the story. Unfortunately, some people have misconstrued that as to mean the final route, Heaven's Feel, is the canon ending, despite that [[MultiVerse all endings are canon in the Nasuverse]].
* KeepCirculatingTheTapes: The Creator/StudioDeen series until it was rescued from Creator/{{Geneon}} by Creator/SentaiFilmworks.
* NoExportForYou: As with a lot of anime based on visual novels, the original VN has never received an official English version. This is even more glaring as other major anime series get their original [=VNs=] localized, including ''VisualNovel/SteinsGate'', ''VisualNovel/{{CLANNAD}}'' and ''VisualNovel/GrisaiaNoKajitsu''.
* TheOtherDarrin:
** Due to [[UsefulNotes/UnionsInHollywood union issues]][[note]]despite ''Fate/Stay Night'' being a non-union dub[[/note]], Creator/KateHiggins was the only member of the original cast unable to reprise her role as Saber for the dub of the "Unlimited Blade Works" movie, leading to Creator/MichelleRuff taking the role.
** Masaki Terasoma replaced Kazuhiro Nakata as Kuzuki in the 2014 anime series due to the latter taking a hiatus from voice acting due to medical issues.
* RealPlaceBackground: Some locations in Fuyuki City are based on real-life places in Kobe and Fujisawa City.
** Ryudou Temple is modeled after the Yugyoji Temple in Fujisawa City.
** The iconic Fuyuki Bridge and the building that was the inspiration for Rin's house can be found in Kobe.
** Two buildings in the Akashi Castle complex were also used for inspiration: the Oda Nagayamon gate (which is where the outside shot of the Emiya residence is modeled after), and a dojo that served as the model for the archery dojo of Homurahara Academy.
* RelationshipVoiceActor: Gilgamesh is voiced by Creator/TomokazuSeki, who has several times played roles of villains that lust over the character played by AyakoKawasumi (Saber's voice actor).
* WhatCouldHaveBeen:
** [[AllThereInTheManual An artbook known as ''Character Material'']] has revealed that the protagonist was originally a ''girl'' named Sajyou Ayaka and her Servant would have been a guy (named [[{{Engrish}} Saver in the artbook]]). The female protagonist eventually was reworked into Shirou and Rin, but the original idea was animated into a short OVA titled ''Anime/FatePrototype.''
** In one of the Tiger Dojos, Ilya mentions that it would be nice to see a Route in which Shinji cooperated with Shirou, or one Route when Caster became an ally. Taiga right away smacks Ilya in the head and say "Don't talk about the rejected Routes!". Along with the information on the "Ilya Route", which was cut and reworked into the "Heaven's Feel" route because Ilya is the TokenMiniMoe, this means that there would be a lot of Routes, but thanks to "time and resources not being infinite" (another quote from Taiga) they were rejected. To be more specific, Fate/side material revealed that in the Caster Route, Caster would have reversed her age, turned into a loli and become the protagonist's partner. Unlike Rider's route which was also scrapped, none of this was incorporated in the end product.
** ''Fate/Prototype'' shows us that Gilgamesh's original Noble Phantasm instead of Ea was Enki (which is another name for the same god), a bow/double sword combo that allowed him to summon the Surge of Utnapishtim, or as itīs better known, ''[[TheGreatFlood the flood Noah had to survive]]''. He also had a third passive Noble Phantasm that allowed him to survive any battle no matter what, [[UltimateShowdownOfUltimateDestiny which would clash with Berserker's Noble Phantasm, which was to not lose for eleven battles, concluding with Gilgamesh losing but surviving and Berserker winning but dying]]. He was also far more skilled in melee combat, easily trouncing Saber in a fight with only his Enki blades.
** It's stated in the [[HaveANiceDeath Tiger Dojos]] that Nasu had been toying with the idea of giving Ilya her own route if ''Heaven's Feel'' was short enough, but it wasn't. The details of her own route were largely folded into ''Heaven's Feel'' instead. It's also mentioned once that there was originally a scene in the ''Fate'' route where she raped Shirou in a BadEnd, but that scene was obviously cut. And then in FateHollowAtaraxia it's revealed that even Shinji was more likely to get his own route than her.
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