Stargate: SG-1 Crossovers
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UNIT Gate by LycoX reviews
After the events of the season 6 episode 'Disclosure', an organization reveals themselves to the SGC.
Crossover - Doctor Who & Stargate: SG-1 - Rated: T - English - Chapters: 1 - Words: 1,350 - Reviews: 5 - Favs: 14 - Follows: 15 - Published: 2/8 - Brigadier, Gen. Hammond, J. O'Neill - Complete
Seeking Justice by Red Leader
Major Melissa Sumner, the daughter of Marshal Sumner has a new job in and a roll in the Tau'ri Federation Security. Find Trust fugitives, battle the Wraith and fall in love. Marshal Sumner is retired.
Crossover - Stargate: SG-1 & Stargate: Atlantis - Rated: K - English - Sci-Fi/Adventure - Chapters: 4 - Words: 11,835 - Favs: 1 - Follows: 1 - Updated: 2/6 - Published: 1/24 - Jonathan O., Ba'al, Sgt. Mehra/Dusty, Nancy S.
CodeSg1 by SataKazu
Stargate SG-1 and Code
Crossover - Stargate: SG-1 & Code Geass - Rated: M - English - Adventure - Chapters: 1 - Words: 365 - Published: 2/6
Empires Unite! Milky Way by SapphireDawn11709 reviews
When the SGC Destroys the Quantum Mirror after the incident were Doctor Carter and Major Kawasaki appear in Area 51a ripple was sent across the multiverse. When this ripple hit a Forerunner portal chaos ensues as fleets from three universe appear in the Milky Way. Starship Troopers, Mass Effect, Halo Stargate
Crossover - Stargate: SG-1 & Halo - Rated: M - English - Sci-Fi - Chapters: 6 - Words: 24,140 - Reviews: 67 - Favs: 248 - Follows: 306 - Updated: 2/6 - Published: 6/24/2019 - T. Lasky, S. Carter
Terra s Destiny: A prelude to War by GeneralAllenWalker reviews
Jack O'Neill thought he had done enough to earn a retirement. Fighting the russians in east germany, killing an alien god in a distant star system thousands of light years away, being a productive member of the Colorado Springs golf club, all very laudable things, if he allowed himself the compliment. Sadly, it seems, the universe had other ideas as Earth faces an Enemy Unknown
Crossover - Stargate: SG-1 & X-Com - Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 10,313 - Reviews: 7 - Favs: 11 - Follows: 18 - Updated: 2/3 - Published: 12/15/2023 - S. Carter, J. O'Neill
Midnight Wars I: Descent of Midnight by ivedonestranger
Worlds have lived happily without knowledge of the ancient entity in the void. Phil Coulson though learns of it and must lead a team from many universes to stop this creature from destroying the very fabric of countless realities.
Crossover - Stargate: SG-1 & Agents of S.H.I.E.L.D. - Rated: M - English - Chapters: 6 - Words: 10,747 - Favs: 4 - Follows: 4 - Updated: 2/2 - Published: 1/1/2022 - J. O'Neill, P. Coulson
Plot Bunnies for SG1 Harry Potter by resq188 reviews
Harry Potter has an idea and England gives America the two fingered salute. Up for adoption.
Crossover - Stargate: SG-1 & Harry Potter - Rated: K - English - Adventure - Chapters: 1 - Words: 218 - Reviews: 1 - Favs: 3 - Follows: 5 - Published: 2/1 - Complete
Ancient Legos by TCGM reviews
This is a Crackfic, meaning the story is not intended to be taken seriously. Ancient Legos is written for laughs and humor. A Self Insert story, Weldon is a teenager living in Brockton Bay on Earth Bet. Somehow without triggering, he starts getting... Ideas. Features Lego Spaceships. T because of light, Worm-style swearing and a comfy chair joke.
Crossover - Stargate: SG-1 & Worm - Rated: T - English - Chapters: 19 - Words: 84,612 - Reviews: 444 - Favs: 1,503 - Follows: 1,708 - Updated: 1/31 - Published: 10/28/2017
Sisters, the adventures of Samantha and Buffy Carter by FPBarbieri reviews
Samantha Carter, prodigy. Buffy Carter Summers, loving little sister. The story of their lives, together and apart.
Crossover - Buffy: The Vampire Slayer & Stargate: SG-1 - Rated: T - English - Drama/Family - Chapters: 30 - Words: 87,167 - Reviews: 15 - Favs: 27 - Follows: 44 - Updated: 1/28 - Published: 6/1/2021 - S. Carter
A White Knight Amongst The Stars by cdog21 reviews
In trying to stop Willow from ending the world, Xander Harris found himself banished to another reality. In this new world, he must now deal with the trials and tribulations that accompany being the host to a Goa'uld.
Crossover - Buffy: The Vampire Slayer & Stargate: SG-1 - Rated: M - English - Sci-Fi/Adventure - Chapters: 1 - Words: 4,989 - Reviews: 5 - Favs: 41 - Follows: 62 - Published: 1/19
Slayer Scrolls by Ellmarr reviews
Can two children who are just learning to survive save the worlds or do the Fates have other plans for them- a Multi-Cross Over events - Buffy the Vampire Slayer, Stargate SG-1, TMNT, Gargoyles, Criminal Minds, Skyrim, Supernatural. Takes place just before the defeat of the First. Check back continually as I will be doing Chapters for better flow, fixing grammar, and other things.
Crossover - Buffy: The Vampire Slayer & Stargate: SG-1 - Rated: M - English - Adventure/Sci-Fi - Chapters: 38 - Words: 349,924 - Reviews: 5 - Favs: 32 - Follows: 35 - Updated: 1/18 - Published: 1/27/2023 - Faith L.
The Past Meets The Future III: New Future Reveals by BazzCatgirl03 reviews
With the missions the team had done, SG-1 and their friends prepare and wait for the countdown to end. Only to discover a shocking truth about Jack O'neill and Janet Frasier's involvement in the NID. And with it one that could change the course of history in the tv show history focused on them now. Can they fix that past mistake or will the future for SG-1 play out in the same way.
Crossover - StarTrek: The Next Generation & Stargate: SG-1 - Rated: T - English - Sci-Fi/Hurt/Comfort - Chapters: 77 - Words: 815,460 - Reviews: 3 - Favs: 23 - Follows: 22 - Updated: 1/16 - Published: 11/10/2018 - J. Picard, Gen. Hammond, D. Jackson, Jacob C. - Complete
The Meaning of Strength by wlfgang213 reviews
In an attempt to change the future, Xander is influenced to wear a different costume on Halloween, leading him to use his head instead of his fists in his war against the darkness. YAHF. DCAU Costumes, Stargate SG1 Crossover, and a surprise crossover.
Crossover - Buffy: The Vampire Slayer & Stargate: SG-1 - Rated: T - English - Supernatural/Adventure - Chapters: 2 - Words: 7,925 - Reviews: 24 - Favs: 181 - Follows: 274 - Updated: 1/15 - Published: 6/18/2020
The restoration of the UNSC by Warwolff2003 reviews
Reach has Fallen and the newly promoted Captain Jacob Keyes has taken his small fleet and st course for Earth. However, this is not the Earth those in the UNSC remember. This is my version of a similar story by originally by Samsara Sage which was adopted by Ultimate Deathsaurer 2
Crossover - Stargate: SG-1 & Halo - Rated: T - English - Sci-Fi - Chapters: 14 - Words: 71,762 - Reviews: 134 - Favs: 274 - Follows: 387 - Updated: 1/14 - Published: 12/22/2022 - S. Carter, J. O'Neill, Master Chief/John-117, J. Keyes
Requiem VI by bearhug562000
As our heroes close in on the final solution to defeating the Darkness and its dead hordes, they are unaware that their enemies are hot on their respective tails!
Crossover - Buffy: The Vampire Slayer & Stargate: SG-1 - Rated: M - English - Fantasy/Sci-Fi - Chapters: 7 - Words: 14,538 - Favs: 1 - Follows: 2 - Updated: 1/8 - Published: 1/6/2023 - Buffy S., Faith L., J. O'Neill, Teal'c - Complete
Stargate A New Age by kaln7 reviews
Shepard defeated the Collectors, but now he must face a universe different from his own, but his team won't be the only team to help him get through this uncertain future.
Crossover - Stargate: SG-1 & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 17 - Words: 151,582 - Reviews: 173 - Favs: 296 - Follows: 415 - Updated: 1/1 - Published: 4/6/2017
Reborn a Worm by feauxen reviews
Taylor Hebert just can't get a break. She retired to a peaceful alternate Earth after the horror show that was Golden Morning, but Contessa didn't bother making sure she lived to reach old age. And someone seems to be pulling strings behind the curtain, because this definitely isn't the afterlife...
Crossover - Stargate: SG-1 & Worm - Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 20,734 - Reviews: 109 - Favs: 558 - Follows: 765 - Updated: 12/27/2023 - Published: 3/24/2022 - Gen. Hammond, J. O'Neill, Skitter
Gundam Seed: A New Path by readerofgoodfanfiction reviews
The Second Bloody Valentine's War has ended. In the midst of it all, the Atlantic Federation forms a top secret military division called Stargate Command located deep within the heart of Cheyenne Mountain, Colorado. The discovered Ancient relic, the Stargate, help raise back a nation from the ashes of its defeat like a phoenix and shows the galaxy what it truly means to be Tau'ri.
Crossover - Stargate: SG-1 & Gundam Seed - Rated: K+ - English - Sci-Fi/Adventure - Chapters: 27 - Words: 159,843 - Reviews: 254 - Favs: 235 - Follows: 240 - Updated: 12/25/2023 - Published: 7/14/2011 - OC
Stargate: Valkyrie (Revision 5) by Brenna's Urbangirl Projects reviews
Summary: On that fateful Halloween night. Buffy, Xander, Willow, Dawn, Cordelia, Giles, Jenny Calendar and Tara Maclay would be given a new destiny. Along with that destiny they would be given a 3 space going vessels in which to help fight the Goa'uld.
Crossover - Buffy: The Vampire Slayer & Stargate: SG-1 - Rated: T - English - Supernatural/Sci-Fi - Chapters: 19 - Words: 69,452 - Reviews: 45 - Favs: 189 - Follows: 268 - Updated: 12/22/2023 - Published: 12/8/2021 - Xander H., Buffy S., Dawn S., Willow R.
Harry Potter and the Enforced Holiday by tscchope reviews
Harry is sent on holiday and meets Jack O'Neill. I've switched Bane and Secrets episode order, but had Sam learn of her father's illness. Set after the Battle of Hogwarts and follows the crapilogue, somewhat. Jack and Sam will be getting together. For Jack it's sort of a family tradition, for Sam it's her dad's imminent demise that forces her to think about being a mother.
Crossover - Stargate: SG-1 & Harry Potter - Rated: T - English - Sci-Fi/Family - Chapters: 6 - Words: 34,351 - Reviews: 41 - Favs: 152 - Follows: 225 - Updated: 12/21/2023 - Published: 2/14/2023 - S. Carter, J. O'Neill, Harry P., Hermione G. - Complete
Stargate SG-Kat: First Contact by ElohimEditor reviews
Following Ba'al's execution, a new Goa'uld has emerged to threaten the entire galaxy. With its traditional alliances somewhat fragile, and the Wraith and Lucian Alliance on the prowl, the SGC must seek new allies.
Crossover - Stargate: SG-1 & SWAT Kats - Rated: T - English - Adventure/Sci-Fi - Chapters: 4 - Words: 22,103 - Reviews: 1 - Favs: 5 - Follows: 6 - Updated: 12/20/2023 - Published: 11/17/2023
Humanité by Audragon reviews
La mort était douloureuse. Et lorsqu'on était Maître de la Mort, elle était aussi pleine de révélations. Mais lorsqu'on l'était, ce passage n'était que le début, le début vers une nouvelle existence dans laquelle la Mort elle même devenait une protectrice offrant une voie d'accomplissement pour celui qu'elle avait choisi...
Crossover - Stargate: SG-1 & Harry Potter - Rated: T - French - Fantasy/Sci-Fi - Chapters: 37 - Words: 301,999 - Reviews: 330 - Favs: 297 - Follows: 304 - Updated: 12/14/2023 - Published: 1/10/2023 - C. Kawalsky, Thor, Harry P.
Forethough and Planning An SG:A Story by ANBU Operative Goat reviews
The Ancients arrived in a new galaxy, forced away from home by their brothers and sisters. Unable to go back to their old home they built a new one, one that could travel amongst the stars. They built it to last for millennia, and it has stood the test of time. When the Tau'ri awaken the city it provides them with much more than they expected, and an enemy far worse than they hoped
Crossover - Stargate: SG-1 & Stargate: Atlantis - Rated: T - English - Adventure/Sci-Fi - Chapters: 2 - Words: 12,013 - Reviews: 19 - Favs: 66 - Follows: 87 - Updated: 12/14/2023 - Published: 12/4/2021 - Rodney M., John S., Teyla E., Ronon D.
Plot Bunnies for SG1 SW Rebels by resq188 reviews
Crossover story idea. These are some ideas I have had running around in my head. Not good at character development stuff. One shots are about all I can do.
Crossover - Stargate: SG-1 & Star Wars Rebels - Rated: K - English - Adventure - Chapters: 1 - Words: 167 - Reviews: 1 - Favs: 1 - Follows: 1 - Published: 12/10/2023 - Ezra B.
Keeper of Chaos by Jennifer Schumacher reviews
Xander becomes himself for Halloween. Or rather, who he used to be. So does Cordelia.
Crossover - Buffy: The Vampire Slayer & Stargate: SG-1 - Rated: M - English - Adventure/Mystery - Chapters: 144 - Words: 143,788 - Reviews: 553 - Favs: 344 - Follows: 379 - Updated: 12/9/2023 - Published: 11/6/2023 - Xander H., Cordelia C., J. O'Neill - Complete
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