* In Vathara's work ''[[https://www.fanfiction.net/s/5398503/1/Embers Embers]]'', the Author's Notes go a long way in explaining why certain things happened the way they did using real life comparisons including the cultures of Arctic tribes, properly translated Chinese names and terms and the psychology behind a character's portrayal.

* The '''' fanfiction ''[[https://www.fanfiction.net/s/5399721/1/Awakening Awakening]]'' opens with the author admitting to having "a morbid fascination with this period and a deep respect for history" and thus writing the fic as realistically as possible. Various chapters end with notes explaining Josef Mengele's experiments on twins during World War 2, how the twins were cared for, and what happened to most of them after.


* ''[[http://www.fanfiction.net/s/3993367/1/The_Almanac_Chronicles The Almanac Chronicles]]'' is accurate with respect to geography, as well as history from 1958 to [[spoiler: November 22, 1963, when President John F. Kennedy is ''not'' assassinated [[ForWantOfANail due to a side effect of Biff's fortunes]] ]].


* ''Fanfic/ABetterClassOfCriminal'' features a [[VillainProtagonist supervillain]] with [[Literature/MagicExLibris libriomancy]] which let's the user duplicate magic items from fiction. Each chapter typically ends in a blurb further describing the magic items to appear in the chapter and where they're from.


* The author of ''FanFic/HogyokuExMachina'' asked her high school readers if they could define tuberculosis without using Wikipedia to determine if Ichigo and friends would reasonably know. She even checked if ''Series/{{House}}'' airs in Japan to justify Ishida watching the show.


* The fanfic ''[[http://www.fanfiction.net/s/3210906/1/The_Butterfly_Effect_0 The Butterfly Effect 0]]'' is accurate with respect to southern New York state geography as well as historical events.

* ''Fanfic/HeroesForEarth'' has the author's notes in every chapter noting how true to life or factual each chapter is, making the aesops about what one can do to protect the environment even more poignant.

* ''[[https://www.fanfiction.net/s/12290311/6/The-Black-Emperor The Black Emperor]]'' contains a scene of Kallen's mother recalling how she fell into drug addiction which takes cues from the story of an actual drug addict.


* ''Fanfic/ShepherdOfTheStars'' features a lot of Codex entries where the author shows off how much work went into researching the different settings. The author generated randomized tech trees for each faction in the story, tracks what technologies they have researched, and even calculated the composition, armaments, and construction costs of the various fleets that are featured. Considering there are currently ten different factions, this translates to an impressive amount of work.
* ''FanFic/BetweenMinds'' (VideoGame/HalfLife and VideoGame/{{Portal}}) is packed with this with everything from helicopter specifications to language translations to first aid to building layouts to real-life weapons to cut game material to the actual mechanics of an {{EMP}}.
* ''Fanfic/TheWizardInTheShadows'' is notable for having lots of accurate references to the First and Second Ages of Middle Earth.
* ''Fanfic/ChildOfTheStorm'' has this as part of [[Creator/NimbusLlewelyn the author's]] SignatureStyle. The story uses historically accurate Norse titles and foods, accurate use of terms from multiple languages (French, Russian, Latin, and Yiddish among them) and draws on a lot of minor throwaway details from obscure corners of each of the [[MegaCrossover canons]].
** It also uses reasonably accurate depictions of the laws of physics, distance and speed calculations to show how quickly characters would get to one point or another, and more obscure aspects of electromagnetism to expand on the possibilities inherent in certain characters' powers. Oh, and a ''lot'' of History.
* The author behind ''Fanfic/{{XSGCOM}}'' has an author's notes section after every chapter, where he/she explains from ''exactly'' where in the original works every character, plot-twist and gadget in the chapter came. He does the same for ''Fanfic/HuntedTribes'' and ''Fanfic/NewCaliforniaDreaming''.
* [=GreenSonic21=], the author of ''FanFic/SonicGenerationsFriendshipIsTimeless'', has clearly done plenty of research on not only pretty much all of the Sonic games, but also [[Anime/SonicX the]] {{WesternAnimation/Sonic|SatAM}} [[WesternAnimation/AdventuresOfSonicTheHedgehog cartoons]] and [[ComicBook/SonicTheComic comic]] [[ComicBook/SonicTheHedgehog books]], and it clearly shows. He's even referenced events from [[ComicBook/MyLittlePonyFriendshipIsMagicIDW the FiM comic books]] into the story.
* ''Fanfic/DuelingTriggerFinger'' mixes the actual trading card game with the anime's "logic"--such as spell cards being activated on your opponent's turn and playing defense mode monsters face-up--but relies less on DeusExMachina for each victor of any given duel to win. A good example is Makoto's duel with Rex where Makoto locks down Rex's Frostosaurus with Blizzard Dragon long enough to play Dragon Shield on Golem Dragon, making it pointless for Rex to attack and then summoning a monster a few turns later powerful enough to wipe out the rest of Rex's life points.
* Every hotel, restaurant, new age shop, and strip joint mentioned in ''FanFic/OriginStory'' is an actual location, and all the prices involved are authentic. The writer mentions several times in his notes that he actually called these people up and asked them questions. Of special note were the women who worked in the men's department at Macy's in New York City, who actually had a twenty minute long phone call with the writer in which they described what could be seen outside the store from the window's of their department.
* ''Fanfic/{{Vigil}}'' goes to some lengths explaining how plasma weaponry from ''Videogame/XCOMEnemyUnknown'' operates and how it interacts with ''Franchise/MassEffect'''s kinetic barriers, including the important point that plasma, being a state of matter, has mass and is thus affected by gravity. Furthermore, because thermal energy can only be transmitted through a vacuum by radiation instead of more efficient methods like convection or conduction, plasma that doesn't hit something in space is largely ineffective, especially when ships have heat-resistant hulls. As a result, kinetic barriers prove highly effective against plasma. This caused quite a few angry reviews from readers who incorrectly insisted that plasma was just another form of energy and should ignore kinetic barriers altogether. Ironically, ''Videogame/MassEffectAndromeda'' would [[WordOfGod eventually and firmly decide the question]]: kinetic barriers ''do'' block plasma and particle beams.
* ''[[https://www.fanfiction.net/s/12696961/1/Stallion-of-the-Line Stallion of the Line]]'' is filled with not only sailing jargon and techniques but also brings up the various strengths of different ship types (such as the superior speed of schooners). Particularly noteworthy is that unlike the popular in fiction strategy of exchanging broadsides, naval battles tend to see ships attempting to "cross the T"[[note]]The attacking ship sailing perpendicular to their target so they can broadside them without taking fire in return[[/note]]. Likewise one might be able to sail a given ship with only ten sailors but still need several dozen more to man cannons.

* The medical procedure in the first chapter of ''Fanfic/ExtraLife'' was researched extensively and is greatly detailed to show it. Author's notes also tend to draw attention to or mention other things researched, including PTSD, therapy methods, timeline details, and Japanese geography and culture.

* ''FanFic/FacingTheFutureSeries'': Author Aaron12 takes his time research the cartoon, picking up obscure details and other things to avoid {{Continuity Snarl}}s. It only helps to make the series more popular.

* The ''Disney/{{Zootopia}}'' story ''[[https://www.fanfiction.net/s/11830794/3/Zootopia-At-Our-Core At Our Core]]'' has the [=ZPD=] follow proper police procedure due to the writer coming from a family of police officers.


* ''Fanfic/BringerOfDeath'' is first a ''Anime/DragonballZ'' fic, and second an attempt to [[DoingInTheWizard plausibly explain the physics of DBZ]]. The result is an epic story that appeals to fans [[WillingSuspensionOfDisbelief unwilling to suspend their disbelief]] in poorly-explained spaceship mechanics, etc.

* ''Fanfic/{{Forward}}'' featured realistic space movement, including how dangerous it is to have unsecured materials when there's no gravity. Later on, small-unit infantry tactics are lovingly described as Jayne evades a gang of professional, military-trained gunmen trying to hunt him down.


* Half of ''FanFic/HuntingTheUnicorn'' is a CerebusRetcon of Blaine's RelationshipSue and KnightInShiningArmor portrayal. The other half is [[DeconstructionFic showing what it would take to produce someone like Blaine.]] Given that the author is studying psychology and read up on medieval chivalry, it isn't surprising that some readers find it so believable.
** She also notably averts ThereAreNoTherapists and turns the story into a four-way crossover [[spoiler: when Blaine gets kidnapped by a StalkerWithACrush ]]. The concussed Blaine needs three weeks of checkups with [[Series/{{Firefly}} Simon Tam]] [[RealityEnsues to make sure he doesn't have brain damage,]] plus therapy with [[Series/GameOfThrones Sansa]] for the huge amount of emotional trauma he's dealing with. [[RealityEnsues Simon ALSO calls]] [[Series/CriminalMinds the Behavioral Analysis Unit]] just to make sure [[spoiler: Blaine's stalker didn't sexually assault him while he was incoherent and unable to remember anything.]]

* ''[[http://www.potionsandsnitches.net/fanfiction/viewstory.php?sid=2660 Different, Not Defective]]'' features a well-researched and sensitive portrayal of an autistic {{Harry Potter}}.
* Salazar Slytherin in ''[[https://www.fanfiction.net/s/12031399/16/A-Year-Too-Soon A Year Too Soon]]'' refers to various locations by their names in the 10th century such as using Buwayhid Emirates to refer to the area of Kuwait, Iraq, and Iran. Furthermore, his excuse for not wanting muggleborns to attend Hogwarts isn't a random FreudianExcuse but because most muggleborns were commoners and thus both uncultured and illiterate. Also, many of them were christian and therefore believed magic to be the work of Satan.
* ''Fanfic/TheParselmouthOfGryffindor'' gives the Sphinx the name of Pili Psusennes an accurate Ancient Egyptian name.

* One of the reasons the fan blog ''FanFic/{{Brainbent}}'' is so popular with fans is because of how accurately and sympathetically it portrays people with mental health issues (except John, who's [[AmbiguousDisorder disorder is unspecified]]). In particular, Autistic readers really like the non-stereotyped portrayal of Autism.

* ''Fanfic/PacificWorldWarIIUsNavyShipgirls'' has the author(s) doing a LOT of research into everything related to each of the ship girls they've created, such as the ship's namesake, how it sank, etc. and integrating these things into each of their designs and personalities. The creators have given anecdotes of allegedly receiving praise from veterans or their family for successfully capturing all these details, although some are so obscure that it goes straight into ViewersAreGeniuses.

* In ''[[http://archiveofourown.org/works/7459830/chapters/16952421 Concerning a Drifter]]'', this is mentioned in an authoress note for Chapter 12 (where we find out [[spoiler: Ryuuko is a mother]] that she wanted know to know if one could find out if the mother had twins (or, rather, if the babies came from the same pregnancy) through via a DNA test, mentioning that she did some research that boiled down to it being "yes and no" with differing reasons, so, to make it more plausible she changed it to where a mistake was made in during the testing.
** Also, in said note, she does mention how she did research on Japan's legal systems in regards to [[spoiler: rape and sexual assault]], mentioning a few outlines on what's considered resistance against the attacker (i.e fighting back physically vs saying "No") and what whether or not if the victim knew the attacker meant to the case and the police asking Satsuki questions about Ryuuko prior to what happened to her and after, even linking to her sources, one of which details someone else's experiences (which did involve similar questions that Satsuki was asked).
** In terms of Ryuuko, being kidnapped, held captive, and [[spoiler: raped (subsequently being four times impregnated, carrying two babies to term and miscarrying two)]] for four years can and, a good chunk of the time, do have near irreversible effects on the psyche, however, they might not be to the effect of Ryuuko's. Likewise, what her captors and accomplices did to her could have lasting physical repercussions, as well as psychological ones, as its mentioned that she might need a reconstruction of her private parts and female organs because of the damage she took, along with having her pelvis fractured many times.
** From Chapter 18, this is played with. According to the note, she tried to do as much research as she could on the subject of adoption and child custody in Japan, however, she didn't turn up much anything, so she had to "wing it" for the plotline but, if she obtains more info, she'd update her note with her sources. In Satsuki's case, this is a bit more overt, as "takatsubo" is an actual condition, generally caused by a sudden shock of emotional stress.
* When writing ''Fanfic/CellarSecrets'', the authoress did as much research as she could on the subject, as would be noted on the "WildChild" page, feral children are rare, thus factual information on them is scant, nevertheless, she did turn to two well known cases, Genie and Oxana Malaya, , though mostly the former.
** To be more specific, the older Ryuuko is, the less they can actually reclaim what was lost to [[spoiler:abuse, neglect, and severe isolation]] like Genie, who was about 12 or 13 when she was rescued), however, at least, she's learned language due to living around it, even if she didn't have normal human interaction (like Oxana, who lived around dogs but otherwise not away from other humans).
* This was probably accidental but ''FanFic/TheCrimsonGarment'' is pretty accurate with what can be the effects of prolonged abuse in terms of Satsuki's psyche, considering the fact that she associates touch with domination, not being able to tell love from manipulation, and is quite afraid of her mother, along with blaming herself for the abuse.

* ''[[https://www.fanfiction.net/s/11732188/1/Wings-of-Change Wings of Change]]'' goes into a fair amount of detail about wing structures, such as having minute receptors on the wings and a large collection of bones, justifying how Meta Knight (and later Kirby) can fly, with the species' powerful lungs also helping them out. It also discusses the actual processes of flying such as needing a high lift-to-drag ratio which reduces the amount of energy needed for sustained flight.

* The ''Series/Daredevil2015'' two-part fanfic ''[[http://archiveofourown.org/series/280353 Marci Stahl is Better Than You]]'' does something very few works involving blind people do, and acknowledges that Braille has a number of weird contractions that don't translate well into written English; not just used to combine two words, but also to condense common words into a few Braille dots (and primarily prepositions). It is the discovery of such contractions in the dossier on Fisk that leads Marci to suspect Matt is the Devil of Hell's Kitchen.

* ''Fanfic/RuinValue'' is set in the ruins of [[spoiler:Seattle, Washington, with all the buildings, businesses, and UsefulNotes/McDonalds restaurants all located in their real-world locations.]]
* [[http://www.fimfiction.net/user/kalash93 Kalash93]] puts A LOT of effort and research into his stories. The greatest examples of this so far are the [[http://www.fimfiction.net/story/81159/1/racer-and-the-geek/predawn gun porn and detail about the military equipment]] in ''FanFic/RacerAndTheGeek'', and the high levels of realism and detail put into the military aspects of [[http://www.fimfiction.net/story/90939/1/shell-shock/the-tower Shell Shock.]] His erotic pieces greatly avert YouFailSexEdForever.
* ''FanFic/ThePiecesLieWhereTheyFell'': The author and his beta/co-writer don't just rely on online translations for the Bilingual Bonuses. They find people who actually know the language they're using.
* In [[FanFic/EquestriaAHistoryRevealed Equestria: A History Revealed]], the author clearly has done some research into the show and the franchise as a whole. Little in-jokes from the fanbase are prevalent in the fic, and most impressively, the author manages to tie in even the most obscure sources to create one unified Equestrian history canon, pulling from the show, comics, and even the often-forgotten chapter books.
* ''Fanfic/SilentKnight'': Nightfyre's flightsuit puts constant pressure on her limbs, ensuring proper blood-flow to the brain during stressful maneuvers. This is the same way real life flightsuits work for jet and fighter pilots.
** In the same chapter, Ash Coat notes some materials on the [[spoiler: human sword]] that genuinely act as absurdly sharp material when treated correctly; it's suggested that some {{Applied Phlebotinum}} is employed to sustain this condition.
* "Fanfic/CelestiaSleepsIn" and its sequel "Fanfic/OntoThePonyPlanet" by Admiral Biscuit ([[https://www.fimfiction.net/story/76290/celestia-sleeps-in link]]) has a blog post for every chapter detailing all the research the author has put into it. This ranges from historical 18th century technology to social mores to anthropology to physics to even actually preparing Equestrian foods in real life to see how the author's human digestive system handles them.
* ''FanFic/FriendshipIsOptimal'' has a lot of accurate science, and the author has clearly done a lot of research on artificial intelligence and philosophy.
** The RecursiveFanfiction ''FanFic/FriendshipIsOptimalAlwaysSayNo'' similarly shows this, with military and medical details being accurately depicted.
* ''FanFic/DividedRainbow'', which contains lots of links to phenomenon such as moonbows and lunar phases.
* ''Fanfic/PonyPOVSeries'':
** The author has done a ton of digging into obscure MLP lore when it's come to previously generations.
** The Shining Armor Arc sees a ''lot'' of care put into military research.
* ''Fanfic/TheBridge'': The author has paleontology as his primary focus. It ''shows''.

* The author if {{Kamikakushi}} included information about various youkai.

* Cornova did a lot of research with regards to the ins and outs of the Anime/{{Pokemon}} anime for ''Fanfic/PokeWars''.
** A prime example is how he included an entire chapter on Kaiza, a character from an episode of ''{{Anime/Pokemon}}'' that never made it out of Japan.
** Also, numerous one-shot characters (Duplica, Yas and Kas Gyms, AJ, etc.) are portrayed perfectly in character.

* Breech Loader, author of fanfiction ''FanFic/PrisonIslandBreak,'' has put considerable research into such things as medical procedures, prison etiquette, blood types, speech impediments, and the kinds of injuries that would ''really'' be caused by the weapons used in the story.
** The story is also commended for maintaining the personalities of the canon characters even with regard to other canon characters they'd never interact with in canon.

* ''Fanfic/BaitAndSwitchSTO'':
** "Fanfic/SolaereSsiunHnaifvdaenn"'s author's notes mention doing a lot of research to get the details of [[UsefulNotes/{{Islam}} Shi'a]] religious practices correct (the main viewpoint character is an Iranian Shiite, but the author is an American [[UsefulNotes/{{Christianity}} Methodist]]), and even link to [[http://www.al-islam.org/nutshell/files/prayers.pdf a Shiite-specific handbook for the daily prayers]].
** ''Fanfic/AChangedWorld'' suggests that black holes are scary enough ''without'' needing to be {{unrealistic|BlackHole}}. Gravitational TimeDilation and redshifting of EM radiation, and the interference caused by radiation from the accretion disk are all plot points. The only concessions to ''Franchise/StarTrek'' are natural consequences of Treknology: a ship can use its warp drive to partially counteract TimeDilation for itself (the ship[[spoiler:s]] USS ''Bajor'' rescues suffered drive damage and couldn't), and can withstand the gravity well with its structural integrity field.

* In [[https://123leyang321.deviantart.com/ 123leyang321's]] story "Fanfic/StormHawksFanThirdSeason", besides keeping all the characters surprisingly in character, even the most tertiary canon characters, the author really does her research on the topics she talks about in the episodes. A few examples are:
** How gravitational time dilation works.
** How surface tension functions.
** How evolution works for the same species living in completely different parts of the world, which will cause them to become vastly different subspecies.
** It discusses how a crystal that can teleport the user needs to bend time as well as space in order to instantly send the user to a different location and how this ability would give it the capability of allowing the user to time travel as well (since it already bends time and space anyway).
** The pteroeagles hate the heat because they are hot blooded with the same thick skin of reptiles, which would allow them to easily store heat inside their bodies, so that's why they prefer cold climates.

* The ''WesternAnimation/TotalDrama'' fanfic writer, Tropers/{{Gideoncrawle}} shows his work [[SignatureStyle routinely]].
** In his first story, ''[[Fanfic/LegacyTotalDrama Legacy]]'', this is most apparent in the [[DescriptionPorn details]] related to the victim's wound. His later stories have substantial Notes sections that explain the more obscure allusions, among other things.
** His Season 1 reimagining story, ''Fanfic/TheLegendOfTotalDramaIsland'' tends to show his work in-story for such things as inventive solutions to certain problems, and the effects and treatment of hypothermia.

* A lot of details went into the researching behind the locations, schools and universities that appear in the [[AlternateUniverseFic real-world AU]] [[http://tvtropes.org/pmwiki/pmwiki.php/FanFic/Freefall Freefall]], as well as [[spoiler: the symptoms of leukaemia, which a main character is diagnosed with early in the plotline.]]

* There's a [[http://vicki595.livejournal.com/363916.html women's basketball rpf pirate!au fic]] that actually has [[http://vicki595.livejournal.com/364097.html a list of references]] the author used when researching the era. Half of the fic is written as a popular history book, half as a novelization of a film based on the book.