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->''There raise not the dead.''
->''There cannot recover lost things, never again.''
->''Even the greatest miracle can only affect the living--''
-->-- '''OpeningNarration'''

Once upon a time, [[Franchise/{{Nasuverse}} Kinoko Nasu]] thought of a story where various legendary figures were summoned by wizards and [[UltimateShowdownOfUltimateDestiny made to fight each other]] for the Holy Grail. That story would eventually become ''FateStayNight'', following the protagonists Shirou Emiya and the female knight Saber....

[[WellThisIsNotThatTrope But]] [[WhatCouldHaveBeen before that]] there was ''this'' story, where the protagonists were [[GenderFlip Ayaka Sajyou and the male knight Saber]].

''Fate/Prototype'' is a twelve-minute {{OVA}} released with Season 3 of ''Anime/CarnivalPhantasm'', acting as a digest version of the original concept of ''Fate/stay night''. It also encompasses a number of AllThereInTheManual material including character designs and story excerpts. The basic idea is the same as ''Fate/stay night'', but the difference is in the details.

Four characters (Ayaka, Saber, Lancer, and Archer) appeared in the Hanafuda game in the [=PSVITA=] port of ''VisualNovel/FateStayNight Realta Nua'', with their own scenario.

A Special Drama CD for ''Fate/Prototype'' was released on November 10, 2012. Another Special Drama CD was released in September, where Saber of ''Fate/Prototype'' being a guest star along with [[VisualNovel/FateStayNight Blue Saber]] and [[VideoGame/FateExtra Red Saber]].

In March 2013 at the Anime Contents Expo Type-Moon released ''Fate/Prototype -Animation Material-'', an artbook that contained storyboard illustrations of ''Fate/Prototype'' and scenes that weren't aired in the trailer.

A LightNovel, titled ''Fate/Prototype: Pale Silver Fragments'', began serialization in Comptiq magazine starting in August 2013, with Volume 1 released in September and Volume 2 released in October. The series is written by Hikaru Sakurai of Liar Soft and illustrated by Nakahara. The story is about the First Holy Grail War that occurred in Ayaka's childhood, essentially making it ''Prototype'''s answer to ''LightNovel/FateZero''. Eleven chapters have been released, divided into three Acts: "Little Lady", "Best Friend" and "Beautiful Mind".

'''This article will contain unmarked spoilers for ''Fate/Prototype'' and ''Fate/stay night'''''.
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!!Tropes include:

* ArtifactOfDoom: The Holy Grail will cause TheEndOfTheWorldAsWeKnowIt if completed.
* AllMythsAreTrue: KingArthur, [[Literature/TheEpicOfGilgamesh Gilgamesh]], [[ClassicalMythology Perseus]], [[CelticMythology Cu Chulainn]] and [[Literature/BookOfRevelation The Beast]] have been summoned into the modern day for an UltimateShowdownOfUltimateDestiny.
* AllThereInTheManual: Long before the OVA, Ayaka and the male Saber were introduced in a ''TYPE-MOON'' art book called "Character Material". ''Prototype'' itself came with an art book of it's own, further expanding on the characters and story.
* AncientConspiracy: The Holy Grail War.
* BlingOfWar: Most of the Servants' armor is rather ornate. Archer's is even entirely gold plated.
* TheCallKnowsWhereYouLive: Ayaka Sajyou was told by her father before his death that she had no choice but to participate in the war herself, when the time came--but she wanted nothing to do with it, traumatized over the loss of her father and sister. Too bad the war came to ''her'', in the form of Lancer and a pack of hunting dogs.
* ChristmasEpisode: In the Special Drama CD, Ayaka spends her Christmas after the Holy Grail War on a cruise with Saber, Lancer, Archer and her AxCrazy sister Manaka... [[WalkingDisasterArea and then gets caught up in a murder mystery]]...
* CrapsackWorld
* CrossoverCosmology: Figures from legend and prophecy around the globe coexist here. Of course, [[UltimateShowdownOfUltimateDestiny not for long]].
* TheEndOfTheWorldAsWeKnowIt: If the Grail ritual is completed, the ''Literature/BookOfRevelation'' happens.
* {{Expy}}: Inverted. ''Prototype'''s characters aren't based on the ''Fate/stay night'' cast, the ''Fate/stay night'' cast is based on ''them.''
* EyesDoNotBelongThere: Some of the [[PowerTattoo command seals]] features angel wings with eyes on them.
* FeatherMotif: Ayaka and crow feathers.
* FunctionalMagic: Laid the framework for the magic system in the Nasuverse, though a number of concepts turned out differently from here.
* GoodWingsEvilWings: The command seals are all based on angel wing motifs. About half of them still manage to look malevolent and creepy despite this.
* GenderFlip: Inverted. Shirou Emiya of ''Fate/stay night'' is a gender flip of ''Prototype'''s protagonist Ayaka Sajyou. Same goes with Saber, since she is also a gender flip of Ayaka's Saber-class Servant [[spoiler:and by extension, also a gender flip of KingArthur]].
* GratuitousEnglish: The text in the OpeningNarration is strangely worded. They also come with Japanese subtitles.
* HotSpringsEpisode: In the Hanafuda Minigame included in the [=PSVITA=] port of ''VisualNovel/FateStayNight Realta Nua'', Ayaka and her team get this ending in their scenario.
* KillSat: Archer summons a mystical one at the end of the original trailer--it's his [[ReadingsAreOffTheScale EX]] ranked Noble Phantasm, Enki: Sword of the End, which summons the Surge of Utnapishtim. It's capable of flooding the entire planet.
* PowerTattoo: The command seals (or as they're called here, Master Degrees).
** Also,the prototype Gates of Babylon, Bab-ilu: Key of the King's Law, which in this is a tattoo on Archer's face.
* {{Prequel}}: ''Pale Silver Fragments'' is this. Well, maybe. Given that ''Prototype'' is just a RealTrailerFakeMovie with some AllThereInTheManual material and {{Drama CD}}s, one could say that it's the actual beginning of the story.
* RealTrailerFakeMovie
* StormOfBlades: Just like his ''Fate/stay night'' counterpart, Gilgamesh has a Noble Phantasm capable of this called Bab-ilu: Key of the King's Law. However, it's a tattoo on his face, and it fires weapons out of six small portals that form a circle around him not unlike a gatling gun, rather than as a gigantic downpour.
* TheStinger: Manaka Sajyou laughing in a massive pile of bones.
* TearsOfBlood: Rider after killing everyone in the hospital.
* ThemeNaming: The seven masters are given Master Degrees based on the angelic hierarchy: Princes, Powers, Virtues, Dominions, Thrones, Cherubim, Seraphim. The exception is Sancraid Phahn, who is given the title of Absence (or Void)--he is actually an anomalous eighth master in the War.
* UltimateShowdownOfUltimateDestiny: Eight all-stars of legend enter. Only one gets to leave.
* UrbanFantasy: Just like with ''VisualNovel/FateStayNight,'' all the magic shenaningans take place in modern Japan.

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