Best Mature Case Fic Fanfics
The 6 most-loved mature case fic fanfics on AO3, ranked by kudos. Case fic offers the rare double satisfaction of a genuine plot to chew on and characters revealed through how they work, deduce, and depend on each other under pressure.
Top 6 Mature Case Fic Fanfics
Ranked by AO3 kudos. Every fic on this list is tagged with case fic and rated Mature.
Professional Couple Only
by saltyfeathers
There's a haunted apartment building in Vermont, and the ad says "Professional couple only". Dean and Cas rise to the occasion.
Fuck pride (pride only hurts, it never helps)
by ImogenGotDrunk
After the android uprising, Connor becomes a permanent fixture in the DPD. That’s fine. Gavin can accept that. The dipshit’s more human than he used to be, and a decent detective to boot. Gavin can deal with him being around.What Gavin cannot deal with is Connor’s replica; prissy, cold-eyed, and wit
would that i
by therandompasserby
A climate protester and a cop walk into a coffee shop and walk out with yet another humanity-ending prophecy dragging their worlds together. Ancient monsters and hidden depths - literal, or otherwise - are just given. Fortunately for Blüdhaven (and the world), they’re Percy Jackson and Dick Grayson.
Test of Faith
by elf_on_the_shelf
Vimes has to deal with getting back to the present day.He also has to deal with the realities of being a new father and with some certain happenings that took place on a dark and rainy night. Even if he thinks that maybe those should not be mentioned. Or thought about in too much depth. Or at all, c
Once Upon a Timepiece
by dracox_serdriel
Just outside New Orleans, a small town becomes home to fairy-tale miracles, drawing the attention of the supernatural world. The Winchesters investigate, but they could be dealing with something they've never dealt with before: a powerful curse on fairy tale characters.
Nie rozdziobią nas kruki
by kanarek_bez_glowy
Sherlock Holmes zostaje zaangażowany przez Donalda Tuska do wybadania przeszłości Karola Nawrockiego podczas kampanii prezydenckiej 2025.
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About This List
This list of 6mature Case Fic fanfics spans 294,196 total words. Kudos range from 4 on the newest entries to 19,752 on the most established. 50% are marked complete — check the status flag before committing to a longfic. The most common rating is Mature (6 of 6 fics).
Recurring tags across this list: Case Fic · Alternate Universe - Canon Divergence · Fluff · Canon-Typical Violence.
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