Stargate: SG-1 Crossovers
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Robotech: The Stargate Saga: Otherworld by andrewjameswilliams reviews
AU set in the Stargate Saga fusion universe. What might have happened if they had discovered the Stargate a few years after the arrival of the SDF 1 on Earth and how would it effect the events of the First Robotech War?
Crossover - Stargate: SG-1 & Robotech/Macross - Rated: T - English - Sci-Fi/Adventure - Chapters: 9 - Words: 40,623 - Reviews: 64 - Favs: 101 - Follows: 129 - Updated: 2/5 - Published: 9/5/2024 - J. O'Neill, Charlie O., Lisa/Misa, Rick/Hikaru
One Big Jump by goulmeister1 reviews
AU:An Aerlion ship on patrol encounters the Cylons at the beginning of the first Cylon war and suffers a misjump, forty years later an expedition leaves Earth bound for Abydos, the Stargate has just been opened for the first time.
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi - Chapters: 18 - Words: 252,461 - Reviews: 69 - Favs: 74 - Follows: 93 - Updated: 2/5 - Published: 1/7
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: 118 - Words: 1,125,621 - Reviews: 3071 - Favs: 3,398 - Follows: 3,015 - Updated: 2/2 - Published: 6/18/2010 - S. Carter, Harry P.
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: 18 - Words: 78,544 - Reviews: 266 - Favs: 695 - Follows: 939 - Updated: 2/1 - Published: 12/24/2020 - D. Jackson, J. O'Neill, Teal'c, Master Chief/John-117
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: 6 - Words: 40,308 - Reviews: 5 - Favs: 8 - Follows: 10 - Updated: 2/1 - Published: 11/17/2023
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: 175 - Words: 1,196,230 - Reviews: 470 - Favs: 207 - Follows: 228 - Updated: 1/25 - Published: 9/25/2021 - [Adora/She-Ra, Catra] S. Carter, J. O'Neill
My New Boss by ElohimEditor reviews
After being arrested for helping Dark Kat, Hard Drive is sent to Alkatraz, where an unexpected ally helps him escape and offers him a deal he could hardly refuse, and would change his life and his perception of the world forever.
Crossover - Stargate: SG-1 & SWAT Kats - Rated: T - English - Sci-Fi - Chapters: 11 - Words: 82,749 - Reviews: 1 - Favs: 5 - Follows: 7 - Updated: 1/31 - Published: 10/16/2021
Stargate Atlantis Trading Grounds II: The SGA Training Preparations by BazzCatgirl03 reviews
After the Tok'ra arrive the truth is revealed to why Captain Samantha Carter turned on him. As Commander Dr. Daniel Jackson reveals the truth to the planet about the origins of the Ancients. The joint chiefs, president, the cabinet and the program leaders prepare to create a new. More advanced version of Starfleet, alternate season 3, bashing of major characters
Crossover - StarTrek: The Next Generation & Stargate: SG-1 - Rated: T - English - Sci-Fi/Family - Chapters: 55 - Words: 556,593 - Reviews: 1 - Favs: 1 - Follows: 1 - Published: 1/31 - D. Jackson, Gen. Landry - Complete
Stargate Atlantis Trading Grounds I: Birth Of The SGA 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: 146 - Words: 1,587,280 - Reviews: 8 - Favs: 13 - Follows: 19 - Updated: 1/31 - Published: 1/23/2024 - J. Picard, D. Jackson, Teal'c, Gen. Landry - Complete
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: 35 - Words: 108,713 - Reviews: 18 - Favs: 32 - Follows: 46 - Updated: 1/31 - Published: 6/1/2021 - S. Carter - Complete
HARRY POTTER AND THE TEL'TAK by tscchope reviews
Harry Potter 'finds' the tel'tak in orbit. The computer is not quite sentient or it would never have wanted to use Harry as a host. Harry will be meeting Merlin, too.
Crossover - Stargate: SG-1 & Harry Potter - Rated: M - English - Sci-Fi - Chapters: 1 - Words: 6,112 - Reviews: 7 - Favs: 44 - Follows: 66 - Published: 1/30 - S. Carter, J. O'Neill, Harry P., Hermione G.
Stars bound in shadows by Illuviar reviews
The Stargate show implied that the timeline we saw in on screen was arguably the best. We outrigts saw many realities where various decisions and bad luck either doomed Earth, or saw it pay much higher price for its eventual ascension as a galactic power. This is a story about one of those realities where sheer luck and relying on a last minute resque are not wise decisions...
Crossover - Star Wars & Stargate: SG-1 - Rated: M - English - Sci-Fi/Adventure - Chapters: 93 - Words: 304,166 - Reviews: 668 - Favs: 887 - Follows: 985 - Updated: 1/29 - Published: 12/14/2021 - J. O'Neill, Ba'al, OC
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: 10 - Words: 11,535 - Reviews: 16 - Favs: 85 - Follows: 123 - Updated: 1/26 - Published: 1/15/2024 - Xander H., S. Carter, D. Jackson, J. O'Neill
Gateway to infinity by nightreddust reviews
Power isn't just a prize to be won; it's the foundation of empires. I crave it in a way that goes beyond kingdoms, beyond worlds. I will be the architect of a multiverse forged in my image. An empire of infinity, one that stretches across realities, bending all existence to my will. When all roads lead to me, my name will be more than history; it will be eternity.
Crossover - Stargate: SG-1 & Harry Potter - Rated: M - English - Chapters: 15 - Words: 52,239 - Reviews: 44 - Favs: 80 - Follows: 98 - Updated: 1/26 - Published: 10/12/2024
The Kuyoko Queendom by Tsuki Yoko reviews
A group of nine kitsune founded a role playing guild by the name of Kuyoko in the game YGGDRASIL. After the game ends they are transported to the stargate universe. How will our guild fare there?
Crossover - Stargate: SG-1 & Overlord/オーバーロード - Rated: M - English - Sci-Fi/Supernatural - Chapters: 1 - Words: 3,124 - Reviews: 3 - Favs: 15 - Follows: 19 - Published: 1/22 - OC
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: 2 - Words: 4,296 - Reviews: 4 - Favs: 7 - Follows: 9 - Updated: 1/22 - Published: 5/18/2024 - S. Carter, J. O'Neill, Simon, Kamina
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: 59 - Words: 306,045 - Reviews: 976 - Favs: 482 - Follows: 560 - Updated: 1/20 - Published: 3/19/2017 - J. O'Neill, W. Adama
Stargate, Top Gun by Kody Wright 2 reviews
Maverick is recruited by the SGC for a top secret mission.
Crossover - Stargate: SG-1 & Top Gun - Rated: K+ - English - Chapters: 1 - Words: 2,126 - Reviews: 7 - Favs: 9 - Follows: 13 - Published: 1/20
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: 3,135 - Reviews: 10 - Favs: 17 - Follows: 25 - Updated: 1/20 - Published: 7/29/2015
UNSC Rise of the Tau'ri (English Version) by Kagaho0 reviews
When the spirit of fire fled the world of Trove, they did not expect that an improbable event would upset their future and that of the inhabitants of Earth. The survival of humanity could well depend on their decision.
Crossover - Stargate: SG-1 & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 6 - Words: 61,702 - Reviews: 13 - Favs: 46 - Follows: 67 - Published: 1/15 - S. Carter, J. O'Neill, J. Cutter, E. Anders
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. [Ensemble fic with multiple POVs]
Crossover - Stargate: SG-1 & Harry Potter - Rated: M - English - Adventure/Sci-Fi - Chapters: 60 - Words: 409,677 - Reviews: 1386 - Favs: 3,045 - Follows: 4,027 - Updated: 1/15 - Published: 10/1/2021 - [Harry P., Hermione G.] Luna L., Merlin
Stargate Reclamation by Gallanox reviews
Long ago, there was a race that ruled the stars. Thinking themselves invincible, they stepped into a war against an enemy they thought to be inferior, but this proved to be their undoing. They lost the war, and this once mighty race dwindled to nothing, that is, until one small boy in his cupboard under the stairs started his journey to reclaim the stars in the name of his people
Crossover - Stargate: SG-1 & Harry Potter - Rated: M - English - Adventure/Sci-Fi - Chapters: 5 - Words: 40,843 - Reviews: 47 - Favs: 272 - Follows: 427 - Updated: 1/14 - Published: 11/26/2024 - Harry P., Fleur D., Salazar S., Daphne G.
Gateworld by Codey-Wraith reviews
Stargate SG-1 and Gears of War to start, I may include other fan-doms in some ways, for another idea in the future. Either way, chapter one is first interactions later chapters will have a bit more content. I hope you enjoy P M for Gore P
Crossover - Stargate: SG-1 & Gears of War - Rated: M - English - Sci-Fi/Fantasy - Chapters: 3 - Words: 9,107 - Reviews: 15 - Favs: 27 - Follows: 33 - Updated: 1/12 - Published: 5/19/2021 - S. Carter, Teal'c, A. Cole, D. Baird
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: 4 - Words: 32,706 - Reviews: 72 - Favs: 301 - Follows: 427 - Updated: 1/11 - Published: 11/28/2022 - SPARTAN-B312/Noble Six
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: 8 - Words: 10,261 - Reviews: 23 - Favs: 56 - Follows: 82 - Updated: 1/10 - Published: 10/28/2023 - D. Jackson, Danny F., J. O'Neill, Sam M.
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