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Cold Cases, Familiar Faces by mellowmags
Fandoms: Arcane: League of Legends (Cartoon 2021)
03 Oct 2025
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Caitlyn was an ambitious and promising FBI agent–now, she’s been reassigned to the basement, where the bureau keeps the files it has nowhere else for, the “x-files”. It's also where they keep Vi Wickett, an agent notorious for going rogue and causing problems. But the more cases the two work together, the more Caitlyn realizes that maybe there is something out there to believe in…
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concerning the white tiger sighting near mill valley, california by delilahprofitt for tyredegs (onetenths)
Fandoms: KATSEYE (Band)
28 Sep 2025
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"In one quarter mile, keep left."
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Agent Hannibal Lecter is ordered by his superiors and a mysterious Cigarette Smoking Man to partner with "Spooky" Graham - an FBI agent obsessed with unexplained phenomena - and use his scientific and medical knowledge to debunk his cases. But when the two head out to Oregon to investigate a series of mysterious deaths linked to lights in the sky, he gets more than he bargained for.
Will is Mulder, Hannibal is Scully, and this is the pilot episode!
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Following an abduction he has no memory of, Luocha notices the onset of strange and unexplained symptoms that can only lead to one conclusion. Balancing his delicate situation with his work, he and partner Jing Yuan must find a way to uncover the truth of what happened 19 years ago to Jing Yuan's childhood friends... and is now happening to Luocha.
[The X Files AU Jingluo that have been rotating in my mind for weeks. Mature for darker content, not for smut.]
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Duplication by shoobscantsleep
Fandoms: Star Wars - All Media Types, Star Wars Prequel Trilogy, Star Wars: The Clone Wars (2008) - All Media Types, The X-Files
19 Jul 2025
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“Are you familiar with the so-called X-Files?”
“I believe they have to do with unexplained phenomena, sir.”
“More or less.” Kenobi agreed, and Windu nodded.
“The reason you’re here, Agent Naberrie, is that we want you to assist Skywalker on these X-Files. You will write detailed and extensive field reports on all of your activities, day and night, along with your observations on the validity of the work taking place.”
“Am I to understand that you want me to debunk the X-Files project, sir?”
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Or: Special Agent Padmé Naberrie gets assigned to debunk Agent Anakin Skywalker's work on the X-Files. She finds that the paranormal gets harder to deny while working on her first case in a small town named Enhill, Washington.
— anidala week 2025, day seven: free day (X-Files AU!)
Series
- Part 1 of X-Files Anidala
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In Plain Sight by lettersfromnowhere for Farva5
Fandoms: 薬屋のひとりごと | Kusuriya no Hitorigoto | The Apothecary Diaries (Manga), 薬屋のひとりごと | Kusuriya no Hitorigoto | The Apothecary Diaries (Anime), 薬屋のひとりごと - 日向夏 | Kusuriya no Hitorigoto | The Apothecary Diaries - Hyuuga Natsu
28 Jun 2025
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Management is not in Jinshi's job description as an ordinary agent at the Imperial Office of Criminal Investigation. But when his irritating commanding officer assigns him to monitor a brilliant, wily toxicologist who's been investigating cold cases in her spare time, he can't very well say no.
Maomao is sick and tired of her father's insistence on finding reasons to meddle with her life, but if he's going to send her yet another stupidly gorgeous babysitter, she might as well make use of him. And soon, she's not too sorry to have the help - because her harmless personal project is about to get her in way over her security clearance, uncovering secrets at the very heart of the questions both Jinshi and Maomao have spent their lives too afraid to ask.
(Or: The X-Files, but make it Jinmao.)
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Sirius and Remus are together in almost every way that counts, even if not in all the ways they want. Above all else, they trust each other, and trust, they both have come to learn, is an important thing in their line of work.
Regulus has been gone for eight years. No one but Sirius believes him to be alive. No one but Sirius wants to believe.
Sirius and Remus are assigned a new case. It dredges up old wounds, new leads and, most of all, a promise of uncovering the truth.
(an X-Files AU of sorts.)
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Entroponetics for Dummies: A Comprehensive Guide of What Not to Do by marspumpkin
Fandoms: Disco Elysium (Video Game)
29 May 2025
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“Agent Kitsuragi, are you familiar with an agent by the name of Harrier Du Bois?”
Kim blinks. If by Du Bois he’s referring to Captain Sober Du Bois…
”Yes, sir. I know of him.”
”How so?”
Water-cooler talk. Kim may not be very social at work, but he hears whispers and snickers carried around the office like leaves downstream. Did you hear how Du Bois drank so much he lost his memory? Oh, God, he’s gone on another bender. He’s had three partners resign in as many months. This time he’s on the street screaming about the apocalypse and threatening to blow his brains out.
Agent Kim Kitsuragi in data analysis might be called the record-holder for the Revachol Citizens’ Bureau of Investigation’s least interesting employee. Seemingly out of nowhere, he is assigned to investigate Pale phenomena with Agent Harrier Du Bois, the Bureau’s most infamous paranormal whack job. What could possibly go wrong?
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When Draco is transferred to the Ministry's X-Files, it seems like Potter is there to ruin his life yet again. But soon he finds himself immersed in the biggest mystery the universe can hand him: how to survive falling in love with the Savior of the Wizarding World. Featuring a UFO convention, some dramatic and unhelpful friends, and a possible alien abduction. Can Draco keep a cool and rational head when everything around him is getting...spooky?
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More Things in Heaven and Hell by JustGettingBy
Fandoms: Superman - All Media Types, Batman - All Media Types, DCU (Comics), Justice League - All Media Types
02 May 2025
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Bruce Wayne joined the FBI to solve cases. Everyone deserves the resolution he never got.
Clark Kent joined the FBI to track down strange phenomena. He wants answers about who he is and where he came from.
They both find it rather unfortunate that they're stuck together—until they don't.
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Castiel Novak is perfectly happy with his work as an instructor at the FBI Academy, regardless of his parents’ belief that he’s wasting his medical degree. But then his life is turned upside down by a new assignment: to join Agent Dean Winchester in investigating X-Files — FBI cases that involve unexplained phenomena.
Castiel is meant to test (or rather, debunk) Dean’s famously wild theories, but he soon finds himself drawn into events he can’t explain. The more time he spends with Dean, the harder it becomes to resist the pull of a man who cares more — and believes more fervently — than anyone Castiel has ever known.
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Obi-Wan es asignado como nuevo compañero a Anakin Skywalker, quien es un reconocido agente por su peculiar trabajo. Sin embargo, Obi-Wan sabe que detrás de un brillante agente, está el apodo 'spooky', un peculiar apodo para un peculiar agente.
Ahora, ambos deberán descubrir las verdades que hay detrás de todos los extraños casos que les son asignados. Y mientras intentan resolver los extraños casos, también deberán aprender a resolver su creciente tensión.
Sin embargo, su camino estará lleno de obstáculos que deberán aprender a superar juntos.
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“Agent Fit, a pleasure to finally meet you. Take a seat please.”
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When FitMC, agent of the FBI, gets assigned to assist agent Pac on working on the X-files, he doesn't expect much. But he soon finds out that in this line of work, normal explanations don't always answer all of your questions.
Or or
An X-files AU in which Fit takes the role of Dana Scully and Pac is Fox Mulder and Cucurucho is weird.
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Agent Renjun Huang is asked to partner with Agent Donghyuck Lee once again. It's a missing persons case, something Renjun is familiar with. However, this is Agent Lee they're talking about. The victim's mother claims it was an alien abduction.
Donghyuck has no evidence. Renjun has no self-restraint.
Rengun agrees to take on the case.
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Prompt: Spooky
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Okay so Alec’s life has gotten complicated. Plus side? He is now officially an FBI field agent.
Negative side: EVERYTHING else…
He’s an Alien partnered with an unsettlingly gorgeous conspiracy nut assigned to An FBI division dedicated to investigating Cryptids, unexplained mysteries and, oh yeah...aliens...
Aliens like him...and his family...
And their boss...
Like he said: complicated.
Fortunately it seems like he can put off the existential crises and moral dilemma for at least a bit longer. Their first case is just normal levels of crazy. Investigating recent sightings of ‘The Jersey Devil’.
Yeah the case seems ridiculous but Magnus seems happy and It’ll be good to have a low pressure case to just ease into their partnership.
And really this’ll be the perfect case to start. I mean come on: it’s a kangaroo/lizard/bat/horse thing. No way there’s any actual truth to that.
Right?Meanwhile Simon’s back at work with his fancy see-the-hidden-world-necklace and it opens his eyes to far more than he anticipated.
Series
- Part 3 of Agents & Aliens (Verse 5)
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The Erlenmeyer Flask by celestarium (meadowziplines), Karalyn
Fandoms: The Sandman (TV 2022)
24 Sep 2024
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When his mysterious informant calls in a tip, an escaped fugitive leads Hob on a chase that takes him closer than he's ever been to solving some of the biggest mysteries in the X-Files. But the answers will cost at least one innocent life, and hit far closer to home than he thinks. Dream, as a genetically engineered human hybrid, is determined to protect his own secrets, those of his loved ones, and the one fugitive who wasn't supposed to survive. Investigating partly on his own, Dream runs straight into the tangled web of secrets and afoul of those who would do him grave harm…
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No real knowledge of the X-Files series should be necessary to read this series, however, reading the previous fic probably is. And once again, the timeline is fudged a bit, this is after the 1990s, before the 2020s but nothing more specific than that.
Thank you to Readertee for Britpicking!
Series
- Part 4 of Dreamling X-Files AU
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Special Agent Luis Serra was one of the FBI's best. Until he poked his nose where it didn't belong, in the mysterious "X-Files" cases. He quickly became obsessed, believing them to be the key to solving the strange disappearance of his grandfather.
Not wanting to lose a genius, highly educated agent, the FBI assigns rookie agent Leon Kennedy to be Agent Serra's partner on the X-Files, hoping that Kennedy will be able to debunk all of Serra's crackpot theories and bring him back to reality.
Unfortunately, Leon starts realizing Serra might actually be onto something…
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A sudden unexplainable group of murders in Point Pleasant, West Virginia has caught the attention of FBI agent and believer of the Supernatural, Jane Rizzoli. Her partner in crime and non-believer, Maura Isles is dragged along on the ride, as they try not to get murdered by the humanoid creature plaguing this small town.
Aka A Rizzles X-files au that nobody asked for LMFAO
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Amestris' Most Unwanted by just_trying_my_best_everyday
Fandoms: Fullmetal Alchemist - All Media Types, Fullmetal Alchemist: Brotherhood & Manga
11 Jun 2024
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"You're forgetting the most important part, Hawkeye." He added, tapping the tip of his nose. He then pointed at her like she was supposed to complete the sentence. She did not give him the pleasure. "The sightings."
"Here we go," she sighed.
A mysterious disappearance draws the attention of CBI agents Roy Mustang and Riza Hawkeye. However, the investigation leads them to places they thought they'd never see again.
Written for 6/11 Day.