Stargate: SG-1 Crossovers
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Like Father, Like Son by Bella Gracelyn Prentiss
(one-shot) Ever wondered why Rory dies so many times and still manages to come back? When Rory dies again, he meets Oma Desala who arranges a meeting between both father and son. How will Rory feel about meeting his biological father? Will Rory learn about his biological mother's identity and why he was given up?
Crossover - Doctor Who & Stargate: SG-1 - Rated: K+ - English - Sci-Fi/Family - Chapters: 1 - Words: 1,071 - Favs: 1 - Follows: 1 - Published: 3/24 - Rory W., D. Jackson - Complete
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: 3 - Words: 16,864 - Reviews: 14 - Favs: 71 - Follows: 140 - Updated: 3/22 - Published: 2/14 - S. Carter, J. O'Neill, Harry P., Hermione G.
A Brutal Truth REWRITE by ReadyAimWait reviews
ADOPTED FROM BIG Z1776: When the Twelve Colonies and Earth are brought together through a technical fluke some may wish the fluke had not occurred at all. Because with two great spacefaring powers not everything can end well for both of them.
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: T - English - Adventure/Sci-Fi - Chapters: 25 - Words: 166,395 - Reviews: 292 - Favs: 307 - Follows: 464 - Updated: 3/21 - Published: 10/6/2021
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: 3 - Words: 5,075 - Updated: 3/20 - Published: 1/6 - Buffy S., Faith L., J. O'Neill, Teal'c
Beginning a New Path by stargatesg1fan1 reviews
Massive multiverse crossover between Harry Potter/Buffy/Stargate/Star Trek Enterprise/X-Men/Fantastic Four/Iron Man/Highlander/Justice League/Underworld/Star Wars and More in that order. Harry Potter is the main character. Full summary inside. Non-Traditional-Harem, Builds up to Awesome Power Harry. 1 Million Words. 150 Smut Scenes (Very Sensual Story).
Crossover - Stargate: SG-1 & Harry Potter - Rated: M - English - Sci-Fi/Adventure - Chapters: 115 - Words: 1,105,709 - Reviews: 3000 - Favs: 3,099 - Follows: 2,707 - Updated: 3/19 - Published: 6/18/2010 - S. Carter, Harry P.
Harry Headlines At Glastonbury by tyrannicpuppy reviews
Since the war, Harry has taken to exploring long-forgotten places as a chance to escape his extensive and unwanted fame. But what he found in the depths of Glastonbury Tor will change not only his own life, but the future of all.
Crossover - Stargate: SG-1 & Harry Potter - Rated: T - English - Adventure/Sci-Fi - Chapters: 39 - Words: 259,511 - Reviews: 891 - Favs: 2,435 - Follows: 3,383 - Updated: 3/16 - Published: 10/1/2021 - [Harry P., Hermione G.] Luna L., Merlin
How You Play by Tanista2
It's time for war games to resume at the New Earth SGC. But who will be the last man (or woman) standing? (Ad Astra 'verse)
Crossover - Stargate: SG-1 & MacGyver - Rated: T - English - Humor - Chapters: 1 - Words: 6,210 - Published: 3/13 - D. Jackson, J. O'Neill, MacGyver, OC - Complete
Fleet of the Homeword Bound: Battle of Antartica by Sora with an S reviews
With Anubis due to arrive any minute, Stargate Command are not in the mood for anything else going wrong. A bunch of fictional starships showing up as a bunch of shipgirls certainly qualifies.
Crossover - Stargate: SG-1 & TV X-overs - Rated: T - English - Adventure/Sci-Fi - Chapters: 7 - Words: 40,181 - Reviews: 19 - Favs: 63 - Follows: 80 - Updated: 3/9 - Published: 4/8/2022 - Gen. Hammond, Elizabeth Weir
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: 12 - Words: 43,659 - Reviews: 96 - Favs: 177 - Follows: 258 - Updated: 3/5 - Published: 12/22/2022 - S. Carter, J. O'Neill, Master Chief/John-117, J. Keyes
A Legacy of Chaos: A Ship of Line Story by andrewjameswilliams reviews
In the aftermath of Ethan Rayne's spell Xander Harris finds himself transformed into a capsuleer and finds himself drawn into the battle between Stargate Command and the Goa'uld Empire. *Chapter one edited.*
Crossover - Buffy: The Vampire Slayer & Stargate: SG-1 - Rated: T - English - Sci-Fi/Adventure - Chapters: 15 - Words: 86,539 - Reviews: 289 - Favs: 846 - Follows: 1,039 - Updated: 3/2 - Published: 3/20/2020
MoonGate by Antonio Cabanas reviews
When two members of an SG team end in the Moon Palace things start to go sideways...
Crossover - Sailor Moon & Stargate: SG-1 - Rated: K+ - English - Adventure - Chapters: 2 - Words: 5,606 - Reviews: 1 - Favs: 13 - Follows: 17 - Updated: 3/1 - Published: 2/3 - Haruka T./Sailor Uranus, Rei H./Raye/Sailor Mars, S. Carter, J. O'Neill
Bound By Destiny by JacGoBama16 reviews
The Colonials discover they are not alone in the Universe. As the SGC races against time to find the Lost city of the Ancients, the Colonials erupt onto the Galactic stage with a tenacious fury unlike anything the Galaxy has seen. Destinies decided thousands of years ago begin to become clear as other forces watch from afar
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi - Chapters: 1 - Words: 39,428 - Reviews: 24 - Favs: 71 - Follows: 92 - Published: 2/26
Stargate SG-1: The Fifth Race by i-defy-fate reviews
AU! Heavily inspired by the story: Project Blue Book by AmeliusTheAlteran. Elements of Halo will be here as well because I love the design of the ships, weapons and equipment they use. This is a story of what a united earth could accomplish when given a common goal. I plan for this to be at least 200-250K words. Starting chapter 2 expect to see 10k words per chapter. No pairings!
Crossover - Stargate: SG-1 & Halo - Rated: M - English - Adventure/Sci-Fi - Chapters: 2 - Words: 10,274 - Reviews: 20 - Favs: 98 - Follows: 134 - Updated: 2/26 - Published: 11/23/2019 - S. Carter, D. Jackson, J. O'Neill, Teal'c
Dismantling Destiny: Ends, Transitions & New Beginnings by ImaliFegen reviews
This is a time travel fix-it for SGA S5E19 -'Vegas' crossed over with Stargate SG1 S9 & S10. (See full summary inside.)
Crossover - Stargate: SG-1 & Stargate: Atlantis - Rated: T - English - Adventure/Romance - Chapters: 20 - Words: 61,550 - Reviews: 18 - Favs: 6 - Follows: 7 - Updated: 2/25 - Published: 1/27 - C. Mitchell, John S. - Complete
A Veiled Escape by TannaraMoonvale reviews
The war was over, the light lost. Few of the Light remain. Hermione spent her time studying the Veil, trying to unravel it's mysteries in hope it could help them escape.
Crossover - Stargate: SG-1 & Harry Potter - Rated: T - English - Adventure/Friendship - Chapters: 1 - Words: 5,413 - Reviews: 11 - Favs: 47 - Follows: 42 - Published: 2/24 - S. Carter, J. O'Neill, Harry P., Hermione G. - 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: 16 - Words: 72,871 - Reviews: 414 - Favs: 1,353 - Follows: 1,539 - Updated: 2/21 - Published: 10/28/2017
Through the gate by Asla reviews
Harry Potter thought he had seen it all: magical creatures, hidden worlds, and dangerous adventures. But nothing prepared him for what he would encounter when he stepped through the Stargate.
Crossover - Stargate: SG-1 & Harry Potter - Rated: T - English - Chapters: 1 - Words: 5,565 - Reviews: 2 - Favs: 56 - Follows: 91 - Published: 2/20
The Pioneer's Frontier by Left for Space reviews
Not worth reading, need a lot of work. Just an outline.
Crossover - Stargate: SG-1 & Harry Potter - Rated: K+ - English - Sci-Fi - Chapters: 7 - Words: 3,941 - Reviews: 1 - Favs: 7 - Follows: 13 - Published: 2/13
Robotech: The Stargate Saga Information Files by andrewjameswilliams
Background information files on various groups and technologies that appear in my Robotech: The Stargate Saga story.
Crossover - Stargate: SG-1 & Robotech/Macross - Rated: K+ - English - Chapters: 3 - Words: 4,414 - Favs: 17 - Follows: 16 - Updated: 2/13 - Published: 8/30/2022
The Noble Wolf of Earth by Slim A Lou Prime reviews
Noble Six was fighting the inevitable, he knew he would die on Reach. Yet he was not going to make it easy for covenant. Turns out killing him was outside their ground forces abilities. So they sent a cruiser glass him. That ship only managed to trap him before a flying forerunner monitor decided to set him lose on another galaxy. Maybe he wasn't meant to die on Reach.
Crossover - Stargate: SG-1 & Halo - Rated: M - English - Sci-Fi/Adventure - Chapters: 3 - Words: 26,823 - Reviews: 45 - Favs: 203 - Follows: 315 - Updated: 2/11 - Published: 11/28/2022 - SPARTAN-B312/Noble Six
Egeria's Freedom by Voltaire's Writer
What if Egeria was rescued before she was discovered by the Pangarians? What if Egeria saves Jamie's life? Find out the answers to these questions and more in the story. Disclaimer: I do not own Stargate SG-1 or A Walk to Remember
Crossover - Stargate: SG-1 & A Walk to Remember - Rated: T - English - Romance/Adventure - Chapters: 1 - Words: 2,232 - Favs: 1 - Follows: 3 - Published: 2/7 - Complete
A Lifetime Together by RenaJo reviews
After the events of Three Months to Remember, Samantha Potter returns to America with Harry in tow to begin a life together. summary edited because reasons
Crossover - Stargate: SG-1 & Harry Potter - Rated: M - English - Romance/Adventure - Chapters: 4 - Words: 13,813 - Reviews: 36 - Favs: 175 - Follows: 272 - Updated: 2/6 - Published: 6/18/2022 - S. Carter, Harry P.
Traveller Inbound by ProcrastinationStrikes reviews
The SG-1 Chulak mission happened during a week in February 1997. The Orders to change all astronautical observation devices did not occur as quickly thanks to bureaucracies and a few too-invested researchers. All devices did not reorient to search for eventual aggressive Goa'uld activity until Late March 1997. Making it so that Earth did not miss an unexpected visitor. Absolute AU.
Crossover - X-overs & Stargate: SG-1 - Rated: T - English - Sci-Fi/Drama - Chapters: 1 - Words: 2,548 - Reviews: 2 - Favs: 9 - Follows: 18 - Published: 2/4
Ship of the Line: Far Traveler by Worldmaker reviews
My response to Zaion's Ship of the Line challenge on Twisting the Hellmouth. The Scoobies wake up after Halloween to find themselves in orbit, at the controls of a powerful warship from a thousand years in the future. How will their new circumstances affect a 21st Century Earth that is already embroiled in a secret interstellar war? Rated M for mature language and situations.
Crossover - Buffy: The Vampire Slayer & Stargate: SG-1 - Rated: M - English - Chapters: 5 - Words: 48,824 - Reviews: 150 - Favs: 573 - Follows: 766 - Updated: 2/2 - Published: 6/28/2020 - Xander H.
Star Granger - Season 5 by SFD reviews
Once upon a time, a race of people fled their home planet, not willing to present themselves as gods. They went on and seeded life in substantial parts of the known universe. Klingons will tell you that gods are more trouble than they are worth, and that to grow, a race needs to do all their gods in. But, doing-whoever-all-in is SO not Federation. What a girl to do?
Crossover - Stargate: SG-1 & Harry Potter - Rated: T - English - Sci-Fi/Adventure - Chapters: 23 - Words: 102,771 - Reviews: 152 - Favs: 341 - Follows: 497 - Updated: 2/2 - Published: 6/16/2022 - [Harry P., Hermione G.] S. Carter, J. O'Neill - Complete
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