Stargate: SG-1 Crossovers
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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: 17 - Words: 74,324 - Reviews: 257 - Favs: 639 - Follows: 881 - Updated: 7/3 - Published: 12/24/2020 - D. Jackson, J. O'Neill, Teal'c, Master Chief/John-117
Tardis Adventures (version 15) by Metatron's Prophet
This crossover is about the Second Doctor going to another universe similar to the Stargate SG-1 universe. However, this is not the original. First off, the timeline of events is adjusted to have the Goa'uld arrive through the Stargate first time in 2024. The cast of characters is also not the one from the original show. The Doctor's sonic will be the 12th Doctor's post S9.
Crossover - Doctor Who & Stargate: SG-1 - Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 2,077 - Favs: 2 - Follows: 3 - Published: 6/26 - 2nd Doctor, D. Jackson, J. O'Neill, Teal'c
Through Remnant's Gate by Plains Pirate reviews
On a routine training mission, Team RWBY and Professor Oobleck found something that shouldn't be there, opened a door to secrets that shouldn't be remembered, got involved in a war they had no real business with - and a few others - and started an adventure they would never forget. (Takes place after Volume 2 / Takes place after Shades of Grey)
Crossover - Stargate: SG-1 & RWBY - Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 5,600 - Reviews: 6 - Favs: 20 - Follows: 32 - Published: 6/19
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: 3 - Words: 3,116 - Reviews: 8 - Favs: 14 - Follows: 22 - Updated: 6/13 - Published: 7/29/2015
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: 6 - Words: 1,707 - Reviews: 9 - Favs: 11 - Follows: 14 - Updated: 6/7 - Published: 3/23
Valyrian Steel, Obsidian and Plasma by vardax reviews
a StarGate on planetos
Crossover - Stargate: SG-1 & Game of Thrones - Rated: T - English - Sci-Fi/Adventure - Chapters: 4 - Words: 10,772 - Reviews: 18 - Favs: 29 - Follows: 51 - Updated: 5/29 - Published: 5/8
Stargate Centurion by SingleDarkShade reviews
When Rory demands to leave the TARDIS he did not expect to be dropped off in a top secret American military base. As he learns where he is, the SGC try to work out who Rory is and where he came from.
Crossover - Doctor Who & Stargate: SG-1 - Rated: K+ - English - Sci-Fi/Friendship - Chapters: 1 - Words: 5,442 - Reviews: 3 - Favs: 12 - Follows: 13 - Published: 5/27 - Rory W., Gen. Hammond, D. Jackson, J. O'Neill - Complete
Stargate Atlantis Trading Grounds II: The Glory Of Tantulus II 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: 18 - Words: 184,185 - Reviews: 2 - Favs: 4 - Follows: 3 - Updated: 5/23 - Published: 2/3 - J. Picard, D. Jackson, Teal'c, Gen. Landry
Interstellar Destiny by Ana's Writings
Book 3 in the "Interstellar" series. Lara and Evan finally have their happy ending. Or do they? When a mission goes sideways, Lara is left to believe that her life has been turned upside down. Having to face new challenges, while leaving the one place she has called home for the last few years, Lara has to find a new kind of strength if she is to ever be happy again.
Crossover - Stargate: SG-1 & Stargate: Atlantis - Rated: M - English - Romance/Angst - Chapters: 48 - Words: 27,166 - Published: 5/21 - [E. Lorne, OC] [J. O'Neill, S. Carter] - Complete
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. No pairings! Slow Updates!
Crossover - Stargate: SG-1 & Halo - Rated: M - English - Adventure/Sci-Fi - Chapters: 5 - Words: 27,662 - Reviews: 54 - Favs: 232 - Follows: 323 - Updated: 5/19 - Published: 11/23/2019 - S. Carter, D. Jackson, J. O'Neill, Teal'c
Spiral Gate by GeneralAllenWalker reviews
It was supposed to have been a Mission like any other. Walk through the gate, make contact with the locals, see if they could find any technology or allies useful in the war against the Goauld. Instead Sg-1 finds itself in a village under attack by gigantic mechs, and are forced into a fight much greater than even the one they had sought aid for.
Crossover - Stargate: SG-1 & Gurren Lagann - Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 2,045 - Reviews: 1 - Favs: 2 - Follows: 4 - Published: 5/18 - S. Carter, J. O'Neill, Simon, Kamina
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: 8 - Words: 11,490 - Reviews: 2 - Favs: 12 - Follows: 12 - Updated: 5/12 - Published: 12/25/2023 - Complete
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: 14 - Words: 17,638 - Reviews: 8 - Favs: 31 - Follows: 42 - Updated: 5/10 - Published: 2/9/2023 - [S. Carter, Martouf/Lantash] Jadzia D., B. Sisko
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: 9 - Words: 14,946 - Updated: 5/8 - Published: 2/26
The Zerg Across the Stargate by Fallenknight88 reviews
40 years before the fall of Ra there was an enemy that even the Goa'uld feared, an Enemy that only know one thing, EVOLVE! this is a Response to CrazedGammaMan1721's challenge. Self Insert; Possible Goa'uld Bashing (Hiatus)
Crossover - Stargate: SG-1 & StarCraft - Rated: M - English - Sci-Fi - Chapters: 6 - Words: 15,030 - Reviews: 2 - Favs: 25 - Follows: 34 - Published: 5/7 - J. O'Neill, Ra, Zerg, OC
New SG1 Member by Phantom Dragon Witch reviews
Danny Fenton Joined the air force with hopes of one day going to space. When he was reassigned to the SGC, he had no clue how close he was to getting his wish, even with all the weirdness that followed him from home.
Crossover - Danny Phantom & Stargate: SG-1 - Rated: T - English - Sci-Fi - Chapters: 7 - Words: 9,155 - Reviews: 19 - Favs: 44 - Follows: 73 - Updated: 5/6 - Published: 10/28/2023 - D. Jackson, Danny F., J. O'Neill, Sam M.
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: 5 - Words: 14,978 - Reviews: 16 - Favs: 18 - Follows: 33 - Updated: 5/1 - Published: 12/15/2023 - S. Carter, J. O'Neill
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: 117 - Words: 1,119,632 - Reviews: 3048 - Favs: 3,336 - Follows: 2,934 - Updated: 4/28 - Published: 6/18/2010 - S. Carter, Harry P.
Stargate: The Last Ship by Red Leader reviews
Stargate/DS9/TNG/Voyager/The Last Ship crossover. Ba'al ascended to a higher plane of existence after escaping capture, he descended into a universe and took control of the Dominion to take back what he lost.
Crossover - Stargate: SG-1 & StarTrek: Deep Space Nine - Rated: K - English - Sci-Fi - Chapters: 10 - Words: 26,478 - Reviews: 8 - Favs: 7 - Follows: 12 - Updated: 4/21 - Published: 2/2
The secret of Antartica by everythingilike777 reviews
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: 12 - Words: 14,057 - Reviews: 2 - Favs: 4 - Follows: 4 - Updated: 4/20 - Published: 3/19
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: 7 - Words: 58,145 - Reviews: 141 - Favs: 830 - Follows: 943 - Updated: 4/17 - Published: 1/7 - S. Carter, Harry P., Hermione G. - Complete
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: 19 - Words: 68,079 - Reviews: 78 - Favs: 165 - Follows: 215 - Updated: 4/15 - Published: 3/26 - J. O'Neill, Master Chief/John-117
The Fifth-Race Reclaimers: Upheaval by Piero217 reviews
Over the course of eight months following their triumph over the Precursor threat, the Fifth-Race Reclaimers have been working hard to learn more about each other and their respective galaxies—sometimes without the other side even knowing. But with a new threat looming on the horizon, will they be prepared to defend every living creature they have been entrusted with?
Crossover - Stargate: SG-1 & Halo - Rated: T - English - Sci-Fi/Drama - Chapters: 3 - Words: 8,405 - Reviews: 12 - Favs: 79 - Follows: 111 - Updated: 4/14 - Published: 6/8/2019 - S. Carter, D. Jackson, Teal'c, Arbiter
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: 18 - Words: 66,336 - Reviews: 327 - Favs: 626 - Follows: 768 - Updated: 4/11 - Published: 10/12/2014
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: 20 - Words: 67,979 - Reviews: 30 - Favs: 120 - Follows: 150 - Updated: 4/9 - Published: 12/16/2021
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