Stargate: SG-1 Crossovers
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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 perfect chance to start his life over, he and Teal'C cuts contact with their ex friends, Jack O'Neill and Sam Carter. As they start a trade with the system lords, that is vital to the safety of Earth and the Tok'ra.
Crossover - Stargate: SG-1 & StarTrek: The Next Generation - Rated: T - English - Sci-Fi/Hurt/Comfort - Chapters: 31 - Words: 322,819 - Reviews: 2 - Favs: 2 - Follows: 4 - Updated: 11h - Published: 1/23 - J. Picard, D. Jackson, Teal'c, Gen. Landry - Complete
Stargate:Spartan Siege by Johnnieboy11 reviews
After the battle on Mantle's Approach, the Chief finds himself, alongside a non-rampant Cortana, helping the Humans of a galaxy similar, yet different to his own, battle their enemies, while exploring the countless worlds tied together by a network of ancient portals and uncovering the mysteries surrounding these worlds.
Crossover - Stargate: SG-1 & Halo - Rated: T - English - Adventure/Sci-Fi - Chapters: 15 - Words: 66,294 - Reviews: 221 - Favs: 546 - Follows: 758 - Updated: 2/20 - Published: 12/24/2020 - D. Jackson, J. O'Neill, Teal'c, Master Chief/John-117
Stargate Atlantis Trading Grounds II: The Glory Of Tantulus by BazzCatgirl03 reviews
After finding the device necessary to prevent the Ori from attack gaining knowledge of the Milky Way Galaxy. Lieutenant Colonel Daniel Jackson sets out on a mission, meant to protect Earth. And from attack by the System Lords, by forging a stronger treaty. And with the Greek Titan Cronus and the Emperor Lord Yu, but there is still a threat. Taking form in the shape of his ex team.
Crossover - Stargate: SG-1 & StarTrek: The Next Generation - Rated: T - English - Sci-Fi/Family - Chapters: 5 - Words: 47,709 - Reviews: 1 - Follows: 1 - Updated: 2/18 - Published: 2/3 - J. Picard, D. Jackson, Teal'c, Gen. Landry
Waking into a Dream by stargatesg1fan1 reviews
An SI story where our main character wakes up as a young Harry Potter. Watch as our SI finds himself in a universe slightly different from canon Harry Potter and makes the changes he wants to make. Later also realizing Stargate exists in this universe he makes even more changes. Eventual-Powerful-Harry. Gary Stu. Lots of Smuttiness. Multi-Pairing. Pairing: HG/HP/Sam Carter
Crossover - Stargate: SG-1 & Harry Potter - Rated: M - English - Adventure/Romance - Chapters: 4 - Words: 34,060 - Reviews: 93 - Favs: 562 - Follows: 723 - Updated: 2/18 - Published: 1/7 - S. Carter, Harry P., Hermione G.
Celeste by Amelia E. Adler reviews
Continuation of Midnight Blue, Azure, and Shades of Blue: Intermission. After returning to her own timeline, Alice Boyd has to deal with the fallout. Chasing and confronting her nemesis will only be a part of her struggle; more than anything, she will have to face her own emotions, and who knows where they'll lead her in the end... OC with no AU - futurefic.
Crossover - Stargate: SG-1 & Stargate: Atlantis - Rated: T - English - Sci-Fi/Adventure - Chapters: 60 - Words: 394,772 - Reviews: 204 - Favs: 42 - Follows: 56 - Updated: 2/18 - Published: 3/4/2021
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: 44 - Words: 218,039 - Reviews: 676 - Favs: 425 - Follows: 495 - Updated: 2/17 - Published: 3/19/2017 - J. O'Neill, W. Adama
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: 49 - Words: 304,167 - Reviews: 2311 - Favs: 2,870 - Follows: 3,651 - Updated: 2/17 - Published: 12/11/2021 - Gen. Hammond, Harry P., Hermione G., Lee J.
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: 126 - Words: 861,866 - Reviews: 315 - Favs: 185 - Follows: 197 - Updated: 2/17 - Published: 9/25/2021 - [Adora/She-Ra, Catra] S. Carter, J. O'Neill
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: 4 - Words: 5,850 - Reviews: 4 - Favs: 29 - Follows: 53 - Updated: 2/17 - Published: 1/15 - Xander H., S. Carter, D. Jackson, J. O'Neill
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: 54 - Words: 275,910 - Reviews: 433 - Favs: 351 - Follows: 381 - Updated: 2/14 - Published: 5/23/2022 - S. Carter, D. Jackson, Rick/Hikaru, Claudia
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: 3 - Words: 8,043 - Reviews: 4 - Favs: 20 - Follows: 25 - Updated: 2/14 - Published: 2/3/2023 - Haruka T./Sailor Uranus, Rei H./Raye/Sailor Mars, S. Carter, J. O'Neill
Not Who I Think I Am by kattracks9599 reviews
Examining Loki's experiments on Jack the Asgard uncover experiments done not just on Sam, but Helen also. Set at the end of season 7 of SG1 and around the middle of season 3 of Sanctuary.
Crossover - Stargate: SG-1 & Sanctuary - Rated: T - English - Adventure/Drama - Chapters: 3 - Words: 19,306 - Reviews: 6 - Favs: 6 - Follows: 16 - Updated: 2/14 - Published: 2/9 - S. Carter, J. O'Neill, Helen M., Nikola T.
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: 3 - Words: 10,796 - Reviews: 15 - Favs: 31 - Follows: 35 - Updated: 2/13 - Published: 11/7/2023
Symbiosis by Meushell reviews
A few Tok'ra crash near Deep Space Nine. From there, they and the DS9 staff discover a potential threat to both universes.
Crossover - StarTrek: Deep Space Nine & Stargate: SG-1 - Rated: K+ - English - Adventure/Friendship - Chapters: 13 - Words: 16,369 - Reviews: 7 - Favs: 24 - Follows: 38 - Updated: 2/12 - Published: 2/9/2023 - [S. Carter, Martouf/Lantash] Jadzia D., B. Sisko
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: 2 - Words: 4,843 - Reviews: 1 - Favs: 11 - Follows: 17 - Updated: 2/10 - Published: 2/7
Stargate, Airwolf by Kody Wright 2 reviews
AU, multi crossover with 80's shows. After buying an old chopper to restore for airshows, Sam meets the surviving Airwolf crew and recruits Sinjin, Jo and Caitlin to join the SGC. Everything goes well until the first dialout and Daniel finds an artifact with a symbol he has not seen before that sends them back to the 1980's where whey find a powerful alien presence.
Crossover - Stargate: SG-1 & Airwolf - Rated: K+ - English - Chapters: 4 - Words: 9,049 - Reviews: 1 - Favs: 7 - Follows: 9 - Updated: 2/10 - Published: 1/30
Nephalem Outlaws by MetalSaiyan88 reviews
I died and was Reborn in Narutoverse only things didn't make sense, Minato is alive, Naruto has twin sisters wait he doesn't have Chakra, and is that a Stargate, what the hell is going on here... will have crossover with Mass effect, Star wars and Diablo... also Naruto pairing with Liara T'soni, Talizorah and Ashoka Tano.
Crossover - Stargate: SG-1 & Naruto - Rated: T - English - Adventure/Drama - Chapters: 19 - Words: 65,616 - Reviews: 29 - Favs: 111 - Follows: 140 - Updated: 2/9 - Published: 12/16/2021
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: 10 - Follows: 11 - 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: 66 - Favs: 244 - Follows: 304 - Updated: 2/6 - Published: 6/24/2019 - T. Lasky, S. Carter
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: 12 - Words: 67,389 - Reviews: 88 - Favs: 294 - Follows: 453 - Updated: 2/5 - Published: 11/11/2020 - Harry P., Albus D.
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: 21 - Words: 102,292 - Reviews: 165 - Favs: 306 - Follows: 390 - Updated: 2/4 - Published: 10/12/2022 - [Hakuno K., Gilgamesh] J. O'Neill, Ba'al
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: 9 - Follows: 15 - 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
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