Best Epic Alternate Universe (AU) Fanfics
Alternate Universe (AU) fanfics over 100,000 words — the long-form treatment of the trope. Curated from AO3, ranked by kudos.
Top 20 Epic Alternate Universe (AU) Fanfics
Ranked by AO3 kudos. Each fic is tagged with alternate universe (au) and falls in the over 100,000 words range.
Entirely Out of Spite
by Bgtea
"Welcome to a new user experience! You have triggered this interface with the keywords, ‘Stupid game! Stupid devs! I want my f*****g money back!’ You are now bound to the character Tartaglia, the Eleventh Harbinger of the Fatui, codename: Childe! We hope you have an enjoyable user experience and we
A Shot in the Dark
by Silver_pup
When he opens his eyes again, he finds himself in his old bed in his old home in his old body. Is this death? Or a trick of magic? Either way, Bilbo recognizes a second chance when he sees one, and this time his adventure with Thorin is going to go a bit differently.
Conquering the Great King
by SuggestiveScribe
Iwaizumi blinked his gaze over to Oikawa, "Last time was supposed to be a one time thing," he said, voice low, lacking some conviction.Oikawa's lips twitched into a smirk and he brought them hovering just over Iwaizumi's, "One time thing, Two time thing, what's it matter as long as it's not a Relati
The Student Prince
by FayJay
A Modern day Merlin AU set at the University of St Andrews, featuring teetotal kickboxers, secret wizards, magnificent bodyguards of various genders, irate fairies, imprisoned dragons, crumbling gothic architecture, arrogant princes, adorable engineering students, stolen gold, magical doorways, atte
Divided We Stand
by KouriArashi
Derek is being pressured by his family to pick a mate, and somehow stumbles into a choice that they didn't expect and aren't sure they approve of....
Ásgarðrian Galdr
by Valerie_Vancollie
What if Loki was able to warn his past self, so he did not lose control during his regency and was able to act as he normally would? What if he had been able to remain calm and in control of himself, and the situation? "How?" Loki demanded. "Betrayal," his future self stated simply, rage clear in
The Necromancer
by Maeglin_Yedi
Harry Potter disappears when he is four years old and the wizarding world believes him dead. But when his name comes out of the Goblet of Fire, Harry returns in a storm of lightning; a grown man raised in a world of violence, more powerful than anyone could imagine, and the worst thing of all? He do
Too old to be this young
by Nadia_Castillo
He was smiling. At Tom Riddle. He was going to get murdered before the year ends, he just knows.Alternate universe/Post-Hogwarts. warnings: mature themes, drinking, swearing. An adult Harry Potter with all his knowledge and experience is transported to his 23yo body in a universe with no war.
(Maybe I Love You) We're Too Young For That
by orphan_account
If there’s anything Taehyung dislikes more than writing pop songs, it’s writing songs for Jungkook: rising idol, CF magnet, and one of the biggest douchebags Taehyung’s ever met. But hey, it pays the bills. russian
Soft Hands, Fast Feet, Can't Lose
by dolce_piccante
American Uni AU. Harry Styles is a frat boy football star from the wealthy Styles Family athletic dynasty. A celebrity among football fans, he knows how to play, he knows how to party, and he knows how to fuck (all of which is well known among his legion of admirers). Louis Tomlinson is a student an
Relief Next To Me
by dolce_piccante
AU. What happens when a baker and a graphic designer meet via a very specific Craigslist post? Fate, friendship, food, and maybe more.
Down a Rabbit Hole to Westeros
by Lamia_Kuei
A SI into Selyse Florent, later Selyse Baratheon. Refusing this time around to be vexed by a mustache, lack of indoor plumbing, and no more guacamole in favor of keeping her eyes on the prize: Surviving the upcoming Long Night and not letting Melisandre go Full Melisandre.
Angel's Wild
by LimonadeGaby (orphan_account)
But that’s the whole reason he’s here, isn’t it? He’s not out here hunting Humans. He’s not even hunting deer, or bears, or anything else that featured in Bambi. He’s out here, freezing his nuts off every night, because he’s hunting Angels.Sometimes Dean wishes that Angels were like how they’re desc
Tommy's Ultra-Important Keychain
by SeriouslyCalamitous
“Be my apprentice,” Icarus blurted. Tommy blinked. Gradually, the corners of his mouth dropped into the deepest frown he’d ever made. “What the fuck? Why?” “Why?” Icarus froze and Tommy raised a judgemental eyebrow. “It’s because of your powers.” “My powers,” he echoed. “I never told you wh
Lucky Us
by PrincessKitty1
-AU- Marinette Dupain-Cheng's life isn't going as planned: twenty-six, recently dumped, and running her parents' bakery. The highlights of her day are the emails sent by her mysterious pen pal, Chat Noir. That is, until handsome model Adrien Agreste starts swinging by the bakery after hours. But how
Scum Villain AUs
by Feynite
Various random alternate universe fics.Includes:Supervillain AUGenderswap AUHades & Persephone AUDragon Monster AUMermay AUFree Guy AU& Many More!
Love Is A Rebellious Bird
by 100percentsassy
AU in which the boys still make music. Louis is the concertmaster of the London Symphony Orchestra, Harry is the New! and Exciting! interim conductor/ex-cello prodigy who "has made Mozart cool again" according to Esquire Magazine (Louis hates him immediately, which is definitely why he internet sta
Below the Surface | SPY AU
by KiiraDraws
If there’s one thing Izuku never imagined happening to him after losing One For All, was to be forgotten. Now a professor at U.A. High, he spends his days teaching and his nights haunted by the life he left behind. He tells himself the quiet is enough, but the ache of his past—of failed dreams, lost
What In Me Is Dark, Illumine
by telelli
“Abashed the Devil stood, and felt how awful goodness is, and saw virtue in her shape how lovely: saw, and pined his loss."-John Milton, 'Paradise Lost' In September of 1942, Tom Riddle is a brilliant, bitter schoolboy on the precipice of becoming a monster. Already wearing his first Horcrux around
Onyx
by geoffaree
Harry and Jax’s second summer at Spinner’s End and third year at Hogwarts. One filled with new and exciting classes, a surprisingly competent Defense Professor, and a few revelations that nobody saw coming, least of all Harry himself.
More Epic Alternate Universe (AU) Fics on AO3
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About Alternate Universe (AU)
Stories set in a different universe or setting than canon, from coffee shops to space operas.
Infinite creative possibilities - seeing beloved characters in entirely new contexts.
Common scenarios: Coffee shop AU, college AU, royalty AU, no powers AU, historical AU.
About This List
This list of 20epic Alternate Universe (AU) fanfics spans 4,793,179 total words. Kudos range from 8,823 on the newest entries to 47,769 on the most established. 60% are marked complete — check the status flag before committing to a longfic. The most common rating is Mature (9 of 20 fics).
Recurring tags across this list: Alternate Universe · Time Travel · Alternate Universe - College/University · Slow Burn.
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