Stargate: SG-1 Crossovers
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An Unstoppable force Meets an Immovable Object by RusticItalian reviews
Ethan remembers better times, and it gets interesting, A little nostalgia can be a good thing, a lot of nostalgia might just save the planet. Halloween Inspired Cross-Over between Buffy-verse and Stargate Sg1
Crossover - Buffy: The Vampire Slayer & Stargate: SG-1 - Rated: M - English - Sci-Fi/Adventure - Chapters: 5 - Words: 6,462 - Reviews: 6 - Favs: 46 - Follows: 74 - Updated: 3h - Published: 1/15 - Xander H., S. Carter, D. Jackson, J. O'Neill
Stargate Atlantis Trading Grounds I: The Return To La Rochelle by BazzCatgirl03 reviews
After surviving a fatal assault at his apartment, Daniel Jackson is transferred to the SGA, under the military command. And of General Hank Landry, deciding this is the chance to start his life over. As he and Teal'C, after the cruel and cold blooded betrayal the year before. Of their team, they leave the SGC and start a new life. Alternate Forever In A Day main character bashing.
Crossover - Stargate: SG-1 & StarTrek: The Next Generation - Rated: T - English - Sci-Fi/Angst - Chapters: 76 - Words: 775,893 - Reviews: 3 - Favs: 6 - Follows: 6 - Updated: 7h - Published: 1/23 - J. Picard, D. Jackson, Teal'c, Gen. Landry - Complete
HALO: All the Stars in the Sky: Information Files by Spartan-076A reviews
Information Files for my Halo/Stargate fanfiction I have in development. Rated M for intense scenes of combat and violence portrayed in the main story.
Crossover - Stargate: SG-1 & Halo - Rated: M - English - Sci-Fi - Chapters: 3 - Words: 1,339 - Reviews: 1 - Favs: 1 - Follows: 5 - Updated: 8h - Published: 3/23
Hogan's Heroes' Heroes by TannaraMoonvale
Colonel Hogan gets sent to Stalag 13 but how does his operation become so big so quickly?
Crossover - Stargate: SG-1 & Hogan's Heroes - Rated: K - English - Adventure/Friendship - Chapters: 1 - Words: 4,258 - Published: 11h - S. Carter, J. O'Neill, R. Hogan, P. Newkirk - Complete
Magic by Kody Wright 2 reviews
Crossover with Harry Potter. OC, AU. Sam's old friend from her childhood comes to the SGC with a secret. Professor Snape is trapped off world protecting kids from Morgan Le Fey. Jack finds out he can do magic.
Crossover - Stargate: SG-1 & Harry Potter - Rated: K - English - Chapters: 4 - Words: 8,930 - Reviews: 7 - Favs: 18 - Follows: 27 - Updated: 11h - Published: 2/7
In Fire Forged (StargateHalonBSG fusion) V2 by Illuviar reviews
The Goa'uld System Lords led by Ra fight for survival and domination against the Covenant. The Prophets in their lust for power have proclaimed Humanity's extermination, and decreed the destruction of the False Gods. Long dormant and forgotten Stargates come to life to bring UEG's Earth and the Colonies of Cobol into a bloody contact with the galaxy at large...
Crossover - Stargate: SG-1 & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 10 - Words: 39,329 - Reviews: 24 - Favs: 81 - Follows: 119 - Updated: 16h - Published: 3/26 - J. O'Neill, Master Chief/John-117
Robotech: The Stargate Saga by andrewjameswilliams reviews
As robotechnology changed humanities destiny so does a chance discovery beneath the remains of the Giza plateau revealing both an ancient legacy and an ancient threat.
Crossover - Stargate: SG-1 & Robotech/Macross - Rated: T - English - Sci-Fi/Adventure - Chapters: 57 - Words: 292,233 - Reviews: 459 - Favs: 361 - Follows: 388 - Updated: 16h - Published: 5/23/2022 - S. Carter, D. Jackson, Rick/Hikaru, Claudia
Ascension by MCL3pra reviews
Hey all! This is my story, Stargate: Ascension. The story takes place three years after the events of SGU's final episode. SG-1 is hard at work trying to find a way to bring Destiny home. I will be adding more chapters in the future. Enjoy! (One thing to note: this is an alternate reality to the SG-1/SGA/SGU that we are all familiar with. Some details may vary.)
Crossover - Stargate: SG-1 & Stargate: Universe - Rated: K - English - Chapters: 2 - Words: 1,075 - Reviews: 6 - Favs: 10 - Follows: 17 - Updated: 3/30 - Published: 7/29/2015
Stargate Etheria by Starfox5 reviews
Entering a gate leading to an unknown planet while dodging fire wasn't too uncommon for SG-1. Meeting strange new people wasn't unusual either for the Best Friends Squad. But figuring out how to deal with each other, the remnants of the Horde Clones and the Goa'uld threat without a D.H.D. for the Stargate on Etheria? That was new for both.
Crossover - Stargate: SG-1 & She-Ra and the Princesses of Power - Rated: T - English - Adventure/Sci-Fi - Chapters: 132 - Words: 903,081 - Reviews: 332 - Favs: 185 - Follows: 203 - Updated: 3/30 - Published: 9/25/2021 - [Adora/She-Ra, Catra] S. Carter, J. O'Neill
Stargate- SGi by Kalissa55
Part 3 in Mia's adventures. This time, she finds herself in an alternate universe with no idea how she got there. Will those who are part of the Stargate program help her? Will Ironman or the X-Men come to her rescue?
Crossover - Stargate: SG-1 & Ironman - Rated: K - English - Adventure - Chapters: 2 - Words: 9,465 - Favs: 4 - Follows: 3 - Updated: 3/29 - Published: 3/3
Wormholes and Meteor Showers by Shall-Iin reviews
The SG team finds evidence of a lost race that the Goauld are unable to infest and who legend say are imbued with vast physical powers beyond those all other races. They seek information about the lost race on Earth, where there is evidence they might hav
Crossover - Stargate: SG-1 & Smallville - Rated: T - English - Adventure/Sci-Fi - Chapters: 33 - Words: 128,880 - Reviews: 323 - Favs: 304 - Follows: 423 - Updated: 3/29 - Published: 1/14/2006 - D. Jackson, J. O'Neill, Clark K./Superman, Pete R.
The Defensive Space Force Ship Requirement by tkepner reviews
Harry Potter, and the rest of Dumbledore's Army in his fifth year, use the Room of Requirement to get themselves a spaceship! The problems of a tiny island on Earth don't seem so important, anymore. Wizards in Space! What could possibly go wrong with that? Eventually, this will be a crossover with Stargate SG-1.
Crossover - Stargate: SG-1 & Harry Potter - Rated: T - English - Fantasy/Sci-Fi - Chapters: 51 - Words: 317,305 - Reviews: 2390 - Favs: 3,025 - Follows: 3,809 - Updated: 3/27 - Published: 12/11/2021 - Gen. Hammond, Harry P., Hermione G., Lee J.
In Fire Forged (StargateHalonBSG fusion) by Illuviar reviews
The Supreme System Lord Ra has been missing for a year, the System Lords are straining their bonds, at a perilous time. The alien Covenant has proclaimed the Goa'uld and their servants, as False Gods and Heretics to be exterminated. Meanwhile, the beleagued UNSC struggles for survival, while the 12 Colonies of Kobol are none the wiser about the dangers lurking in the dark...
Crossover - Stargate: SG-1 & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 7 - Words: 21,482 - Reviews: 24 - Favs: 112 - Follows: 140 - Updated: 3/26 - Published: 10/23/2020
Rebirth of the UNSC by ultimate Deathsaurer 2 reviews
Reach has Fallen and the Pillar of Autumn has set a course to earth but not the earth they remember. Adopted from Original Owner: Samsara Sage
Crossover - Stargate: SG-1 & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 17 - Words: 66,220 - Reviews: 317 - Favs: 589 - Follows: 725 - Updated: 3/25 - Published: 10/12/2014
Final Voyage by Red Leader
After the Tau'ri Federation built a stargate that can traverse across dimension, ending the war with the Dominion before it started and apprehended Ba'al, UFP Council disbanded Starfleet that forces the Tau'ri Federation military and stretching them too thin to defend the UFP.
Crossover - StarTrek: Voyager & Stargate: SG-1 - Rated: K - English - Sci-Fi/Adventure - Chapters: 1 - Words: 1,347 - Favs: 4 - Follows: 5 - Published: 3/25
How Dr Lee found the Furlings by LittleMiddleA reviews
Who would of thought that the magazine Aliens Among Us! would ever be useful?
Crossover - Animorphs & Stargate: SG-1 - Rated: T - English - Humor/Adventure - Chapters: 6 - Words: 10,123 - Reviews: 2 - Favs: 10 - Follows: 11 - Updated: 3/24 - Published: 12/25/2023
The secret of Antartica by everythingilike777
Luna Sheppard (24) one of the most succesful and youngest military commanders on the face of earth, daughter of Elizabeth Weir and John Sheppard is about to uncover something that would change the life of atlantis and a group of teenagers forever and here is how it started ... with some original characters from the show but some are mine. First FF
Crossover - Stargate: SG-1 & Stargate: Atlantis - Rated: T - English - Sci-Fi/Romance - Chapters: 10 - Words: 11,829 - Favs: 2 - Updated: 3/23 - Published: 3/19
Roads Paved in Shadows by AlbertG reviews
"We don't have information on the numbers yet, sir," one of the commanders answered quickly. "It's not the Cylons. The Thirteenth Tribe is attacking us. We're at war with Earth." Adar was completely stunned that emotion quickly turning into a burning rage. "But why?" he snarled as his rage turned into a need for vengeance.
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: K+ - English - Sci-Fi/Adventure - Chapters: 46 - Words: 227,763 - Reviews: 703 - Favs: 430 - Follows: 505 - Updated: 3/23 - Published: 3/19/2017 - J. O'Neill, W. Adama
Aviator's Second Chance by Phantom-Cosplayer reviews
During an emergency medical evac, Cpt Evelyn O'Neill is shot down & coming back alive will cost an arm, literally. With limited options aside from HD, her father pulls some strings to get her to the Pegasus Galaxy. While she's millions of lightyears away & fighting unknown enemies in a war that's not hers, this might just be the only chance she's got at a normal life
Crossover - Stargate: SG-1 & Stargate: Atlantis - Rated: M - English - Humor/Romance - Chapters: 77 - Words: 362,521 - Reviews: 6 - Favs: 21 - Follows: 22 - Updated: 3/23 - Published: 11/20/2020 - [John S., OC] J. O'Neill, Rodney M.
Les histoires infinies by amandinetrot
Ce sont des petits OS et des textes que j'ai faits pour un atelier d'écriture, que j'ai écrite seul ou avec d'autres personnes.
Crossover - Stargate: SG-1 & Vampire Diaries - Rated: M - French - Chapters: 5 - Words: 8,301 - Updated: 3/17 - Published: 2/26
A Dream Given Form by Nix Nada reviews
COMPLETED! A Babylon5 SG-1 crossover. Daniel gets a mysterious message from a distant place and time, with a very unusual Gate address. I last posted to this one in 2006 but then life got in the way. This year, I decided to revisit and complete it, giving the whole thing a rewrite. If you read the original, I'm sorry for the 18 year wait but I hope you enjoy the finished story!
Crossover - Stargate: SG-1 & Babylon 5 - Rated: K+ - English - Sci-Fi/Adventure - Chapters: 8 - Words: 19,680 - Reviews: 70 - Favs: 34 - Follows: 64 - Updated: 3/17 - Published: 4/22/2005 - S. Carter, D. Jackson, J. O'Neill, Teal'c - Complete
SG Universes at War by celian Cogitore reviews
In a parallel universe, the Tau'ri faces a bloody war between the Systems Lords Anubis and Apophis. The situation is affected by the arrival of a strange character: 'Gilgamesh, the King of Heroes'. The Golden King is looking for Hakuno Kishinami (F) his 'Master'... and woe to the one who will cross his way, that they are false gods or whole aliens civilizations.
Crossover - Stargate: SG-1 & Fate/stay night - Rated: T - English - Sci-Fi/Supernatural - Chapters: 22 - Words: 107,047 - Reviews: 168 - Favs: 314 - Follows: 401 - Updated: 3/16 - Published: 10/12/2022 - [Hakuno K., Gilgamesh] J. O'Neill, Ba'al
Un visage pour deux âmes by Snapy49 reviews
Helen Magnus et Samantha Carter, deux personnes à part entière à première vue. Mais que ce passe-t-il quand Helen se trouve être une autre version de Sam. Une version où Samantha Carter a fini par mourir, effectuer l'ascension et à qui on a accordé une seconde chance sur Terre ne prévoyant pas qu'elle vivrait assez longtemps pour rencontrer son double du SGC ? (couples S/N et H/J)
Crossover - Stargate: SG-1 & Sanctuary - Rated: T - French - Romance/Adventure - Chapters: 49 - Words: 62,709 - Reviews: 113 - Favs: 9 - Follows: 12 - Updated: 3/13 - Published: 6/16/2017 - S. Carter, J. O'Neill, Helen M., Nikola T.
Space Wizards: The dawn of the DSF by yoden reviews
A sequel to Esama's "Wizards IN SPACE" on Ao3. As the crew of an alien spaceship, Harry and the DA must make their own place in a world torn by war. Between discovering the secrets of alien tech, creating their own, fighting for survival and building up an international organization, they are up for an interesting year.
Crossover - Harry Potter & Stargate: SG-1 - Rated: T - English - Adventure/Drama - Chapters: 14 - Words: 77,695 - Reviews: 100 - Favs: 308 - Follows: 473 - Updated: 3/12 - Published: 11/11/2020 - Harry P., Albus D.
The Road to Armaggeddon by Chris Alexander the Bearded reviews
A stargate: SG-1 - Battlestar Galactica :2003 crossover in our current timeline. After years of peace and prosperity in the Galaxy achieved by the Stargate Command, several factions decide to join efforts and put an end to the Tau'ri supremacy.
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: K - English - Sci-Fi/Adventure - Chapters: 4 - Words: 13,488 - Reviews: 20 - Favs: 37 - Follows: 43 - Updated: 3/11 - Published: 11/7/2023
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