RatCreature's Journal

This story puts the MCU characters in the LOTR universe, and it worked really well for me:
In the Shadow of Armistice (63479 words) by superheroresin
Chapters: 13/13
Fandom: Marvel Cinematic Universe, Captain America (Movies), The Lord of the Rings - J. R. R. Tolkien, The Silmarillion and other histories of Middle-Earth - J. R. R. Tolkien
Rating: Explicit
Warnings: Graphic Depictions Of Violence
Relationships: James "Bucky" Barnes/Steve Rogers
Characters: James "Bucky" Barnes, Steve Rogers, Maria Hill, James "Rhodey" Rhodes, Tony Stark, Phil Coulson, Melinda May, Peter Parker, Ultron (Marvel), Vision (Marvel), Natasha Romanov (Marvel)
Additional Tags: The Lord of the Rings References, Post-War of the Ring, Crossovers & Fandom Fusions, Inspired by The Lord of the Rings, Alternate Universe - Middle Earth Setting, Canon-Typical Violence, Alternate Universe - Fantasy, Past Mind Control, Swords & Sorcery, Mind Control, James "Rhodey" Rhodes & Tony Stark Friendship, Elf Steve Rogers, Dunedain Bucky Barnes, Dwarf Tony Stark, Elf James Rhodes, Ungoliant Natasha Romanoff, Wizard Vision, Wizard Ultron, Lord Of The Rings AU
Summary:

Sedryn Amathion is a young Ñoldor elf born of lower Himring near the end of the harrowed Second Age. Vice-Captain of the Forlindon Shieldmasters, herald of the High King Gil-Galad, and devotee of Eärendil, the Star of High Hope.

Or, as the ragtag Dúnedain troupe known as the Howling Commandos calls him, Steve.

The Commandos are to sabotage an orc signal tower deep within the Ephel Dúath mountains, clearing the way for the armies of the Last Alliance to march on Barad-dûr and rescue all of Middle-earth from the clutches of this new and terrible Dark Lord.

“Steve” has no way of knowing that love formed deep behind enemy lines would settle so completely inside his immortal heart, defying time, distance, and ultimately death itself.

Despite my recent X-Men reading bias, I have not gone completely mono-fannish, but these few AU and xover recs would have been lost amidst the large number of X-Men recs, so I decided to stick them in an extra post.

Criminal Minds/Harry Potter

In Darkness, by Mhalachai. Gen, Aaron Hotchner. (ca. 3,700 words)
The premise here is that Hotch is squib who left the magical world, but his son has magic. I really enjoyed the squib perspective here.

Eagle of the Ninth

Fighter, by PlaneJane. Slash, Marcus/Esca. (ca. 65,300 words)
This is for the movie I haven't watched, and it is a modern AU on top of it, so it read somewhat like original fic, but the whole setup worked well for my kinks: Namely, Marcus is an undercover police officer who infiltrates a slave-trafficking ring that organizes cage fights. He stops Esca from being killed in a fight and thus gains a slave.

SGA

Almost Human, by esteefee. Gen. (ca. 30,200 words)
This a robot!Sheppard AU, with a Rodney who doesn't trust the AIs. I was wary of the fic due to all the author warnings, because breaking of trust between my favorite characters (and mindcontrol not written as kink) risks running into my partner betrayal squick, but I like the cyborg/robot trope so I gave it a try and this worked well for me overall with the way it resolved things.

Sherlock

Strangers, by cj_ludd18. Slash, Sherlock/John. (ca. 34,000 words)
Another robot AU, this one with robot!Watson. I wanted to punch Sherlock a lot for being a jerk in this, but that rather fits with his characterization, so it's not really a complaint.

A Story Just Begun, by bergann. Slash, Colby Granger/Evan Lorne. (ca. 3,930 words)
Numb3rs/SGA
This is an "SGC goes public" story, set after season 5 and assumes that they can't hide a floating city in the San Fransisco Bay. I liked how that was handled and thought Numb3rs was fit in well.

Eat it Twilight, by liliaeth. Gen. (ca. 45,775 words)
Criminal Minds/Supernatural
Crossing these universes is a match I really enjoy, and this one gives a great outsider POV on the Winchesters, and the story worked well from both series' worldbuilding perspectives.

The Once And Future Pain In My Ass, by Ras Elased. Slash, Merlin/Arthur. (ca. 6,000 words)
Dresden Files/Merlin
Normally I'm not that interested in fanfic that transposes Merlin to present day and has him look for Arthur's reincarnation, but mixed with Dresden Files like in this story it works for me, because Merlin hires Dresden and we get his POV on the Merlin scenario. Unfortunately this story doesn't give us their whole quest, but even this setup of their first meeting is a lot of fun.

I just stayed up way past my usual bedtime to finish reading this SPN/SGA crossover posted for the apocabigbang.

All Worlds Converge To Where You Are by gottalovev. Slash, John Sheppard/Dean Winchester, John Sheppard/Rodney McKay, Dean/Castiel. (ca. 45,800 words, also available in one file at the AO3)

This has the brilliant premise to mix the SGA alternative reality Vegas-verse with the SPN potential dystopian future from 5x04 The End. The two meshed very well, and I really liked seeing the Supernatural world through Sheppard's POV.

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.

Unexplained, by ALEO. Gen, Don Eppes. (ca. 4,260 words)
Numb3rs/Supernatural
During a serial killer investigation Don runs into the Winchesters. I enjoyed Don's outside POV of Sam and Dean here.

Temporary Alliances, by Cofax. Gen. (ca. 1,930 words)
Stargate: SG-1/Terminator: The Sarah Connor Chronicles
This is short, but has a great Jack POV, as SG-1 runs into a Terminator and Sarah Connor & co.

Connecting Dots & Straight Lines, by This Fish Flies. Slash, John Sheppard/Rodney McKay. (series, ca. 2,500 words so far)
Numb3rs/Stargate: Atlantis
This is mostly fluff with the premise that Sheppard is somehow related to the Eppes, but fun to read.

I just came across a great SGA/DS crossover while I was browsing my friends-of-friends list:

Birds of a Feather, by julia_here. Gen, Benton Fraser, Rodney McKay. (ca. 15,500 words) It's set mostly pre-series for both DS and SGA, but also has a section set after the SGA finale, so there are spoilers for that.

The fanlore wiki doesn't just cause me even more online activity dreams, it also makes me reminisce about past fandoms, and think fondly of fic I've read. Unfortunately too often I can't find the stories again, because sites and archives vanish. :(

I'd never thought one of my favorite X-Files/Homicide crossovers, Saundra's Mulder/Bayliss Slash-Evidence series, which I saw mentioned on fanlore, could be so hard to find again in its entirety, because X-Files is such a well archived fandom, and I remember it not just on her site but also on the Annex Novel archive and Gossamer, and on some slash archive or other, and its parts won a bunch of awards, yet when I looked for it today I found her site long gone and only some parts of the series in the archives that are still around, but not all stories. :(

However, since the parts are finished stories, and the first couple are still around I'm going to rec it anyway, because I reread the first parts and still like it, ten years after I first read the series. I found a WayBack Machine link to her site that lists the parts, but unfortunately the stories themselves aren't archived.

The main stories in the series were grouped in four arcs: Forward Slash, with the stories Young Blooded, Signature, Worst Case Scenario and Segue: Litany and Requiem is still available at Gossamer completely, also on other sites.

Trace Evidence, with the stories Inadmissable, Hobson's Choice, Say Goodnight and Coda: Penance and Lamentation, has unfortunately only the first part still available easily.

However I found Hobson's Choice in ten parts at the google archive of alt.tv.x-files.creative *hearts usenet* here: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10.

also Say Goodnight in ten parts too: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10.

and Coda: Penance and Lamentation in three parts: 1, 2, 3.

The third set of stories Cold Cases is archived at Gossamer: Filial Piety, Prescient Perception I, Prescient Perception II, and Epilogue.

The fourth set Sacrament of Silence started with: Segue: The Ties That Bind and Empty Cage was posted in 13 parts but only three of those made it into the usenet archive. (BTW, if anyone on my f-list has a complete copy or knows where to find it, I'd be really grateful.)

There were also a number of vignettes, some also available at Gossamer. Anyway, I dug it up as best as I could for you to read easily. It's a great series.

Nothing Like Billy, by Embroiderama. Het, Ellen Harvelle/Fox Mulder. (ca. 2,622 words)
Supernatural/The X-Files
There isn't much plot beyond the sex in this crossover, but there was enough characterization and a plausible reason for their meeting to not have the story feel arbitrary.

Leapin Lizards, by Gwendolyn Grace. Gen, Sam Winchester, Dean Winchester, Sam Beckett, Al Calavicci. (ca. 18,560 words)
Quantum Leap/Supernatural
Sam Beckett leaps into John Winchester when Dean and Sam were still children. There is a good case story, and Beckett has to deal with finding out that the supernatural is real, and handle two young Winchesters.

With a Bang, by Mink. Gen, Alec, Dean Winchester, Sam Winchester. (ca. 42,000 words)
Dark Angel/Supernatural
This is a good action-adventure, and I liked how the shows' mythologies were meshed, even though I'm not that into the whole breeding cult arc of DA season two. Also Alec, Sam and Dean together are just fun to watch.

Curiosities (ca. 4,045 words) and Stutter (ca. 1,500 words), by Penknife. Slash, Erik Lehnsherr/Charles Xavier, Tom Riddle, Lily Potter, Sirius Black.
Harry Potter/X-Men
Recently Penknife offered to write timestamp fic, and I noticed that I never recced the original crossover for which I requested a timestamp. Anyway, in the first Erik Lehnsherr encounters Tom Riddle in 1950, the timestamp is set during the first Voldemort war/the Marauders era, and both are interesting and well worth reading.

Brothers in Arms, by SylvanWitch. Gen, Dean Winchester, Derek Reese. (ca. 2,440 words)
Supernatural/Terminator: The Sarah Connor Chronicles
Dean runs into Derek while hunting, and somehow these two shows just go together like chocolate and hazelnuts.

What Kind of Day Has It Been?, by Victoria P. Gen, Dean Winchester, Sam Winchester, Kermit and the Muppet Show ensemble. (ca. 3,300 words)
Muppet Show/Supernatural
I love Muppet crossovers (felt rules! *g*), and this one made me laugh a lot.

An Unlikely Meeting, by Cofax. Gen, Sam Winchester, Dean Winchester, Chiana, Rygel, John Crichton. (ca. 1,030 words)
Farscape/Supernatural
This just a snippet, more an opening into a universe than a full story, but what we get is such a cool crossover setup that it's worth pointing out regardless.

Nor Hell A Fury, by Lucy Gillam. Gen, Sam Winchester, Dean Winchester, Dennis Guilder, Christine. (ca. 14,800 words)
Stephen King's Christine/Supernatural
I haven't read Christine, but this was still a very enjoyable casefile type of story with neat twists in the the car's background. So if you like to read about the Winchesters hunting monsters or evil cars in this case, you should give this a try.

Untaken Roads, by Tassos. Gen, Dean Winchester, John Crichton. (ca. 4,500 words)
Farscape/Stargate: Atlantis/Supernatural
This gives us another glimpse at Crichton as Runner, like in the previous FS/SGA crossover by Tassos that I've also recced. And seeing him interact with Dean is just fun.

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Also, I forgot to c&p one of my SGA AU recs in the recs post yesterday, so I decided to tack it onto this one:

Choice of Duty, by Kyrdwyn. Gen, John Sheppard, Radek Zelenka. (ca. 4,680 words)
The premise here is that John is ex-military, and didn't join the Atlantis mission as military, but as a scientist. After Sumner's death, which happens later here than in canon, he's drafted back into active duty by Elizabeth. I'm not sure I see Elizabeth quite this way, but the interaction between John and Radek made this a nice read.