Rat Creature's Journal

Doubt, by ALEO. Gen, Don Eppes. (ca. 8,300 words)
Numb3rs/Supernatural
I recced the previous two stories in this series already (Unexplained and Explained), and this one is a good read too. The Supernatural world functions more as a vehicle for Don-whump than as equal crossover partner in this one, but it's not as if I dislike seeing Don hurt, and angst while he adjusts his worldview to the supernatural.

Unwilling Oracle, by Beatrice Otter. Gen, John Crichton, Kira Nerys. (ca. 1,870 words)
Farscape/Star Trek: Deep Space 9
This has a really cool premise meshing the wormhole mythologies.

Angels in the Architecture , by Davincis_girl. (ca. 12,000 words)
Supernatural/Terminator: The Sarah Connor Chronicles
I think the two universes are a great mix, especially when it comes to the various teenage experiences of growing up with pseudo-military training, and here John Connor travels back to 1999 and gets the teenaged Sam and Dean to help him.

Downloaded series, by Ennyousai. Slash and het, Kirk/McCoy, Scotty/Six. WIP (for the series, the stories are finished)
Battlestar Galactica (2003)/Star Trek: Reboot
I'm not familiar with BSG, but the author's notes said it would work if you just knew ST and it did work great as a Star Trek AU.

The Time Has Come to Be Gone, by Jujuberry136. Gen. (ca. 28,950 words)
Criminal Minds/Supernatural
I enjoy stories with the Criminal Minds team meeting and dealing with the Winchesters, and this one is a good action/case story.

The Mutant Problem, by Katt. Gen. (ca. 7,900 words)
Spider-Man/X-Men
This is a very cool multimedia fanfic in the form of a fictional photo essay by Peter Parker.

Pigs in Spaaaaaaaace, by Kayim. (ca. 2,580 words)
Muppets/Star Trek
How could I not love a crossover between Star Trek and Pigs in Space?

For I Have Been a Stranger in a Foreign Land, by Mortigi_tempo. Slash, Kirk/Spock. WIP (ca. 10,000 words so far)
Dune/Star Trek: Reboot
This is a very cool crossover setup. Kirk and Spock get stranded on Arrakis.

Northern Lights, by Se_parsons. Gen. (ca. 9,700 words)
Supernatural/The X-Files
In this one we get an outsider POV of the Winchester family as Mulder and Scully run into them during an investigation.

To Become Immortal, First You Have to Die, by ShadowLoverK. Gen. (ca. 3,200 words)
Highlander/Star Trek: Reboot
Kirk is an immortal and has his first death from an allergic reaction during the movie.

Abnormal Psychology (ca. 1,440 words) and A Sam Adams Moment (ca. 1,500 words), by Siriaeve. Gen, Sweets, John Sheppard.
Bones/Stargate: Atlantis
Sweets working for the SGC is just an awesome and funny premise.

A Thousand Pages, by Tartanshell. Gen, Scott Summers, Matt Murdock. (ca. 6,250 words)
Daredevil/X-Men
In this Matt and Scott were penpals fo a while as teenagers, then meet again as adults.

I updated my crossover recs page.

Take a Long Line, by Derry667. Gen, Dean Winchester, Sam Winchester, Don Eppes, Charlie Eppes, Alan Eppes. (ca. 22,000 words)
Numb3rs/Supernatural
The Winchesters are trying to stop a psychic arsonist at CalSci, which we see through the eyes of the Eppes. I liked how competent Sam and Dean were in this story as well as the the outsider look at them.

Defect, by Kikkimax. Gen, ensemble. (ca. 39,600 words)
Criminal Minds/Supernatural
This is set after the second season finale of Supernatural. While Sam tries to get Dean out of the deal with the demon with the help of Bobby and Ellen, Dean is taken into custody by the FBI and interrogated and evaluated by the BAU team. I really enjoyed the take of the profiler team on Dean, and how they try to make sense of him and revise their opinions without ever actually buying into Dean's supernatural worldview.

Untitled snippet, by Pentapus. Gen. (ca. 230 words)
Highlander/Stargate: Atlantis
This is just a brief snippet, but it is a very neat idea to merge the mythologies of the two shows.

Take Atlantis, by Siegeofangels. Gen. (ca. 800 words)
Muppet Show/Stargate: Atlantis
This is quite short, and doesn't really have a plot beyond "the Muppets visit Atlantis", OTOH having the Muppets on Atlantis is awesome and funny.

I updated my crossover recs page.

Old Country, by Astolat. Slash, Sam/Dean. (ca. 40,600 words)
Harry Potter/Supernatural
I don't read a lot of Wincest, but I think this crossover is a great read even if you prefer gen. It's a lot of fun, humor mixed into the angst and drama, and the merge of the Potterverse with SPN here works great, and I liked the take on goblins and their magic in particular.

Harvester of Eyes, by gwendolyngrace. Gen. (ca. 26,000 words)
Sandman/Supernatural
John Winchester hunts the Corinthian, meanwhile Sam and Dean get lost in the Dreaming. This crossover is a great blend of the two sources.

New Jersey Voodoo, by Rokeon. Gen. (ca. 1,020 words)
House/Stargate: Atlantis
This is short, but really funny. John has a relapse back towards Bug!John, starting with an at first innocuous rash and progressing from there, and House tries to diagnose.

Late Nite at the Sudzy Dudz, by Sarah Ellen. Gen. (ca. 3,500 words)
Supernatural/The X-Files
I have no idea how I could have missed reading this story for so long. This crossover is a lot of fun. I guess you could sum it up as "Mulder and Scully meet the Wincesters in a laundromat and talk about cattle mutilations." but the dialog is awesome and it made me laugh a lot, while still being plausible and in character within both series.

The Curious Incident of the Doc in the Night-time (part 2), by Taz. Gen. (ca. 2,920 words)
Highlander/House
House meets Methos in his morgue and is understandably curious. Snark ensues.

AU recs

Stargate: Atlantis

Mnemonic, or Four Ways John Sheppard Didn't Lose His Mind, by cupidsbow. Slash, Rodney McKay/John Sheppard. (ca. 7,250 words)
I recently reread this story, and was surprised to find that I never recced it. It's four brief AUs all with cool worldbuilding, and all dealing with a different kind of amnesia or altered mind.

Junk Cheap, by devildoll. (ca. 13,000 words)
This AU is just sweet and fun, and John as a junk shop owner was kind of awesome.

Harvest Festival, by ras_fic. Slash, Rodney McKay/John Sheppard. (ca. 6,800 words)
This is a cool twist on the "AMTDI because of some backward fertility ritual" cliche, because in this AU the expedition members are Pegasus natives, and Rodney is a disgruntled priest, who's annoyed with the tradition of fertility rituals he doesn't believe in.

The One Where They're Antiglobalization Protestors, by sapote3. Slash, Rodney McKay/John Sheppard, team. (ca. 8,200 words)
Besides being biased in favor of this setting for meta reasons, I liked that the whole team was brought into this AU in a convincing way, and the vivid descriptions and worldbuilding.

Wide Open Ocean, by setissma. Slash, John Sheppard/Rodney McKay. (ca. 10,600 words)
John and Rodney work at an aquarium, and I don't actually remember many more specifics, except that it was a nice, entertaining romance story.

Thule-Gesellschaft, by valderys. Slash, John Sheppard/Rodney McKay. (ca. 7,600 words)
This look at how the alternate universe from the episode McKay & Mrs. Miller might be was creepy and kind of depressing, but full of cool wordbuilding too.

Supernatural

Physiologus, by imogenics. Gen, Sam, Dean. (ca. 5,630 words)
In this AU Sam was pre-med instead of pre-law and tries to find a scientific order in the supernatural phenomena they encounter.

The Sunless Land by lyra_wing. Slash, Sam/Dean, Meg, John. (ca. 11,700 words)
It's kind of rare for me to read Wincest fic, but that they didn't grow up together in this AU made it much easier for me to buy that they'd be attracted to each other, and I have a soft spot for stories in which Sam is kidnapped by the YED and grows up with him and Meg, especially when they are not OTT dark fic, but the demon is still creepy, like in this one.

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crossover recs

Chicago, by ficwriter1966. Gen, Carol Hathaway, Dean, Sam, John. (ca. 4,900 words)
ER/Supernatural
I like outsider viewpoints, so looking at the pre-series Winchesters from Carol Hathaway's POV was really neat.

Knight's Gambit, by killabeez. Slash, Methos/Alva Keel, Duncan/Methos implied. (ca. 4,000 words)
Highlander/Miracles
I admit that I was a little bit lost with the demon plot in this story, because I know very little about Highlander (I've only watched a handful of the first season ages ago and a couple of xovers), but I couldn't resist the allure of Miracles fic. Even missing some of the Highlander context, this was still a very cool x-over premise, not least because Alva as an immortal would not just fit with him knowing all those languages, but explain why that investigation firm of his apparently doesn't really needs to earn money, yet he can still pay his employees.