Stargate: SG-1 Crossovers
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Aim High: A Stargate Tale by lateVMlover reviews
Buffy is the daughter of Jack and Joyce O'Neill when his son Charlie dies. This is a total reworking of BTVS season 1 as Buffy O'Neill is not exactly the same person Hank Summers would've raised. How does Sunnydale handle not having her there?
Crossover - Buffy: The Vampire Slayer & Stargate: SG-1 - Rated: T - English - Family/Hurt/Comfort - Chapters: 11 - Words: 40,350 - Reviews: 56 - Favs: 67 - Follows: 98 - Updated: 2/20 - Published: 9/8/2024
Cowboys, Indians and Stargates by Kody Wright 2
While on a routined mission SG-1 and Dr. Frasier find themselves back in the old west.
Crossover - Stargate: SG-1 & Young Riders - Rated: K - English - Chapters: 2 - Words: 4,390 - Favs: 2 - Follows: 3 - Updated: 2/16 - Published: 2/13
The Signal by Zathara001 reviews
EVIL AUTHOR DAY. AU/Crossover. Not satisfied with Allison's deflections at the end of "Insane in the P-Brane," 3x11, Jack gets a second opinion….
Crossover - Stargate: SG-1 & Eureka - Rated: K - English - Chapters: 1 - Words: 1,927 - Reviews: 8 - Favs: 18 - Follows: 25 - Published: 2/15 - S. Carter, Jack C. - Complete
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: 17 - Words: 58,189 - Reviews: 48 - Favs: 88 - Follows: 106 - Updated: 2/15 - Published: 10/12/2024
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: 94 - Words: 307,924 - Reviews: 683 - Favs: 916 - Follows: 1,017 - Updated: 2/11 - Published: 12/14/2021 - J. O'Neill, Ba'al, OC
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: 267 - Favs: 708 - Follows: 959 - 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: 6 - Favs: 8 - Follows: 11 - Updated: 2/1 - Published: 11/17/2023
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: 8 - Updated: 1/31 - Published: 10/16/2021
Stargate Atlantis Trading Grounds III: 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: 556,074 - Reviews: 1 - Favs: 2 - Follows: 2 - Published: 1/31 - 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: 33 - Follows: 46 - Updated: 1/31 - Published: 6/1/2021 - S. Carter - Complete
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: 89 - Follows: 125 - Updated: 1/26 - Published: 1/15/2024 - Xander H., S. Carter, D. Jackson, J. O'Neill
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: 20 - Follows: 23 - Published: 1/22 - OC
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: 984 - Favs: 482 - Follows: 562 - 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: 8 - Follows: 14 - 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
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: 1389 - Favs: 3,060 - Follows: 4,030 - 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: 49 - Favs: 296 - Follows: 473 - 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: 16 - Favs: 29 - Follows: 34 - 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: 316 - Follows: 442 - Updated: 1/11 - Published: 11/28/2022 - SPARTAN-B312/Noble Six
Stargate Atlantis Trading Grounds IV: Activation Of The SGA by BazzCatgirl03 reviews
In the middle of preparing for a training game, Commander Daniel Jackson decides to show the cadets the truth. And of what SGC/NID complicit operatives attempted to sabotage him. As he starts to realize, everything connected to his childhood trauma. Created a more intense flashback, in the form of Hathor and her army: The Military Intelligence Services and NID, alternate Season 3.
Crossover - StarTrek: The Next Generation & Stargate: SG-1 - Rated: T - English - Sci-Fi/Angst - Chapters: 112 - Words: 1,137,947 - Reviews: 3 - Favs: 4 - Follows: 3 - Updated: 1/2 - Published: 12/4/2024 - Guinan, J. Picard, D. Jackson, Gen. Landry - Complete
HALO-STARGATE: All the Stars in the Sky: Book I by Spartan-076A reviews
The UNSC will have to navigate a galaxy poised to rip itself apart between the ambitions of the System Lords and the scheming of the San'Shyuum Hierarchs. Will humanity triumph and rise victorious from these trials, or will it fall by the hands of its enemies? Only time will tell.
Crossover - Stargate: SG-1 & Halo - Rated: M - English - Sci-Fi - Chapters: 4 - Words: 19,359 - Reviews: 13 - Favs: 51 - Follows: 74 - Updated: 1/1 - Published: 8/1/2024 - S. Carter, Gen. Hammond, J. O'Neill, Master Chief/John-117
Turning the Tide by TannaraMoonvale reviews
After being tortured horribly at Malfoy Manor, Hermione is teleported to another location. Where did she go?
Crossover - Stargate: SG-1 & Harry Potter - Rated: T - English - Adventure/Family - Chapters: 1 - Words: 7,909 - Reviews: 5 - Favs: 26 - Follows: 16 - Published: 1/1 - J. Fraiser, Gen. Hammond, Harry P., Hermione G. - Complete
The Darkness and an Ancient by fmfan1980 reviews
The Ancient known as Athena is relaxing on board the Destiny when it comes upon a galaxy it refuses to enter. She sees a strange energy signature that has covered the entire galaxy and she has to investigate. This is a re-upload of my old X-Over with some changes.
Crossover - Star Wars & Stargate: SG-1 - Rated: K+ - English - Chapters: 2 - Words: 7,904 - Reviews: 15 - Favs: 54 - Follows: 77 - Updated: 1/1 - Published: 11/19/2022
A Tauri in Westeros by fmfan1980 reviews
After a mission that went wrong, Captain Alayne Collins of the Tau'ri finds herself on another world. A medieval world were she finds herself with a double of her mother and brother. (Re-upload)
Crossover - Stargate: SG-1 & Game of Thrones - Rated: K - English - Chapters: 9 - Words: 43,673 - Reviews: 10 - Favs: 59 - Follows: 92 - Updated: 12/31/2024 - Published: 7/21/2023
An Extraordinary Journey by fmfan1980 reviews
Willow from Sunnydale arrives at the SGC under extraordinary circumstances and goes on amazing adventures with the gang from the SGC. BSG:2003 also included in later chapters. (11-Mar-2025: Updated Chapters 1 to 9)
Crossover - Buffy: The Vampire Slayer & Stargate: SG-1 - Rated: T - English - Sci-Fi/Drama - Chapters: 229 - Words: 1,557,486 - Reviews: 1088 - Favs: 558 - Follows: 629 - Updated: 12/31/2024 - Published: 1/26/2014 - [Faith L., Willow R.] S. Carter, J. O'Neill
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