Stargate: Atlantis Crossovers
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Legend of Korra: Atlantis by James118 reviews
When the Ancients arrived in the Pegasus galaxy, they hid Atlantis in the world of benders. Follow the Atlantis expedition as they go through the stargate into the world where magic is real. They will encounter many dangers and challenges but are they prepared for what awaits them in the new world.
Crossover - Stargate: Atlantis & Legend of Korra - Rated: M - English - Adventure/Sci-Fi - Chapters: 20 - Words: 85,272 - Reviews: 30 - Favs: 22 - Follows: 25 - Updated: 12/25/2021 - Published: 12/27/2020 - [OC, Korra] [John S., Teyla E.]
Forethough and Planning An SG:A Story by ANBU Operative Goat reviews
The Ancients arrived in a new galaxy, forced away from home by their brothers and sisters. Unable to go back to their old home they built a new one, one that could travel amongst the stars. They built it to last for millennia, and it has stood the test of time. When the Tau'ri awaken the city it provides them with much more than they expected, and an enemy far worse than they hoped
Crossover - Stargate: SG-1 & Stargate: Atlantis - Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 8,058 - Reviews: 11 - Favs: 39 - Follows: 53 - Published: 12/4/2021 - Rodney M., John S., Teyla E., Ronon D.
The Wraith Worshipper by CPB99 reviews
Jack is broken to see Sam moving on with Pete, a guy who practically stalks her. Taking the first transfer he gets offered he leads Atlantis's flagteam for a year before being captured by the Wraith, now the ones he left behind must rescue him. Talk about clichés. Pairings: Jack, Sam.
Crossover - Stargate: SG-1 & Stargate: Atlantis - Rated: T - English - Sci-Fi/Hurt/Comfort - Chapters: 10 - Words: 9,159 - Reviews: 1 - Favs: 3 - Follows: 3 - Updated: 12/2/2021 - Published: 8/3/2021 - J. O'Neill, S. Carter - Complete
Shattered Times and Timelines: The Defiant Odyssey by the stargate time traveller reviews
The Xindi attack changes everything for Earth. For the first time, Earth and humanity is threatened by an alien race who plan to destroy the planet. But time travellers have no intention of that happening.
Crossover - StarTrek: Enterprise & Stargate: Atlantis - Rated: K+ - English - Sci-Fi - Chapters: 1 - Words: 10,310 - Reviews: 7 - Favs: 33 - Follows: 28 - Published: 12/1/2021 - Complete
The Atlantis & The Wraith by Yui Yuria reviews
-The Atlantis Expedition arrive, little did they know that the world they call "Lantea" has another name as well. To the 13 Colonies it is a Sacred Place, it is the world of their Gods. To them it is called "Cobol"
Crossover - Stargate: Atlantis & Battlestar Galactica: 2003 - Rated: M - English - Sci-Fi - Chapters: 4 - Words: 5,112 - Reviews: 14 - Favs: 19 - Follows: 21 - Updated: 11/20/2021 - Published: 10/6/2021 - John S., Ronon D., W. Adama, Number Six
SGX - Rise of the Terran Empire by Exarikun reviews
Self insert. After many of unpublished adventures, my avatar is ready to put down some roots and start putting his gathered spoils to good use. Mentions of dark and vile actions, not intended for immature audiences.
Crossover - Stargate: SG-1 & Stargate: Atlantis - Rated: M - English - Adventure/Fantasy - Chapters: 3 - Words: 6,178 - Reviews: 4 - Favs: 38 - Follows: 46 - Updated: 11/17/2021 - Published: 10/26/2021
Untold Histories by ImaliFegen
John Sheppard's origins.
Crossover - Stargate: Atlantis & Hawaii Five-0 - Rated: T - English - Adventure/Romance - Chapters: 3 - Words: 22,451 - Favs: 3 - Follows: 1 - Updated: 11/7/2021 - Published: 11/1/2021 - John S., Steve M. - Complete
Portal into Atlantis by StarrFyre reviews
An incoming wormhole drops off an unexpected visitor: Natasha Romanoff, straight from Vormir. This is a super tentative WiP and the title may change. I'm planning on writing more, I hope. Rated K due to canon subject matter, and may change. Takes place early S2 of SGA. Spoilers for SGA and the MCU, specifically Endgame. Please go easy on me. I don't own any of these characters.
Crossover - Stargate: Atlantis & Avengers - Rated: K+ - English - Sci-Fi - Chapters: 4 - Words: 7,782 - Reviews: 14 - Favs: 51 - Follows: 84 - Updated: 11/2/2021 - Published: 3/1/2021 - Elizabeth W., Rodney M., John S., Black Widow/Natasha R.
Fictober 2021 by O'Neillwiv2l's reviews
As Per Tumblr challenge #fictober2021. I have said a couple of these are marked as first chapters or chapters in current stories, I'll mark them as I go along so you know to expect to see it (Particularly on FFN necause you can't cross over works like you can on A03) again.
Crossover - Stargate: SG-1 & Stargate: Atlantis - Rated: K - English - Sci-Fi/Romance - Chapters: 31 - Words: 23,991 - Reviews: 20 - Favs: 5 - Follows: 6 - Updated: 10/31/2021 - Published: 10/1/2021 - S. Carter, J. O'Neill, Rodney M., John S.
Floran Stargate Thing by lizardsocks
Two rogue Floran manage to get to Atlantis - but what are they running from?
Crossover - Stargate: Atlantis & Starbound - Rated: K+ - English - Sci-Fi/Humor - Chapters: 1 - Words: 4,615 - Favs: 2 - Follows: 1 - Published: 10/28/2021 - Teyla E., Floran - Complete
When the Past Unfurls - Part II by ImaliFegen
The continuation from "When the Past Unfurls - Part I" where we find out about exactly what Steve had gotten himself into and John's mysterious connection to this new addition.
Crossover - Stargate: Atlantis & Hawaii Five-0 - Rated: T - English - Romance/Adventure - Chapters: 6 - Words: 24,462 - Favs: 1 - Updated: 10/26/2021 - Published: 10/17/2021 - John S., Steve M. - Complete
When the Past Unfurls by ImaliFegen
The seventh part of the series, A Legacy Left behind. It continues from where The Gemmond Incident left off.
Crossover - Stargate: Atlantis & Hawaii Five-0 - Rated: T - English - Adventure/Romance - Chapters: 5 - Words: 24,796 - Favs: 1 - Updated: 10/11/2021 - Published: 10/3/2021 - John S., Steve M. - Complete
Pianissimo by Tanista2
Rodney McKay shares a late-night musical interlude with a not-exactly-friend. (Ad Astra 'verse)
Crossover - Stargate: Atlantis & Stargate: SG-1 - Rated: K+ - English - Friendship - Chapters: 1 - Words: 3,520 - Published: 10/4/2021 - OC, Rodney M. - Complete
Unlikely Crew by CPB99
With Colonel Conrad Baird and Colonel John Sheppard leaving Atlantis after seeing their friends and family turning on them, they return to the SGC to stop another threat, on their mission they encounter a group of scavengers and thieves, with their assistance they will finally save the galaxy once again.
Crossover - Stargate: Atlantis & Firefly - Rated: T - English - Adventure/Sci-Fi - Chapters: 5 - Words: 9,155 - Favs: 1 - Follows: 1 - Updated: 9/4/2021 - Published: 7/24/2021 - John S., Mal, Inara, OC
The Gemmond Incident by ImaliFegen
This is the fourth chapter of the series called, "A Legacy Left Behind." The SG-11 is finally going on their first official off-world mission.
Crossover - Stargate: Atlantis & Hawaii Five-0 - Rated: T - English - Adventure/Romance - Chapters: 5 - Words: 19,286 - Favs: 1 - Updated: 9/2/2021 - Published: 8/27/2021 - John S., Steve M. - Complete
One Foot In Front of the Other by Mirrored Illusions reviews
Buffy is sent to Atlantis upon request to train everyone in self-defense due to the real danger of the City being invaded. The training goes well, but not everyone understands that 'classified' applies to them, too. (Original summary: Buffy arrives in Atlantis and meets a few of the people living there.)
Crossover - Buffy: The Vampire Slayer & Stargate: Atlantis - Rated: T - English - Friendship - Chapters: 15 - Words: 19,546 - Reviews: 16 - Favs: 33 - Follows: 45 - Updated: 8/30/2021 - Published: 8/1/2021 - Buffy S., John S., Ronon D. - Complete
Paper Stargate Atlantis by Ashley Winter Roberts
In Paper Mario 64, Bowser stole the Star Rod, but Mario managed to rescue the Star Spirits and defeat him. But, how would that adventure have been different if John Sheppard and his team from Atlantis gated into the Mushroom Kingdom during it?
Crossover - Mario & Stargate: Atlantis - Rated: K+ - English - Sci-Fi/Fantasy - Chapters: 1 - Words: 3,413 - Favs: 1 - Follows: 2 - Published: 8/24/2021 - Mario, Bowser, Elizabeth W., John S.
Things You Can't Come Back From by Lady of the Seraphim reviews
Sineya would be proud. Buffy, has given up being Buffy. To survive as Runner from the Wraith she's had to embrace the darkest impulses of the Slayer. When she's finally freed, can she find her way back to who she was before? Does she even want to?
Crossover - Buffy: The Vampire Slayer & Stargate: Atlantis - Rated: T - English - Adventure/Hurt/Comfort - Chapters: 9 - Words: 55,332 - Reviews: 7 - Favs: 23 - Follows: 34 - Updated: 8/16/2021 - Published: 6/17/2021 - Buffy S., Ronon D.
The Origin Stories by ImaliFegen
This is the third chapter of the series, "A Legacy Left Behind." It tells the story of the birth of the enemy, the alliance, and the means to fight the good fight.
Crossover - Stargate: Atlantis & Hawaii Five-0 - Rated: T - English - Adventure/Romance - Chapters: 3 - Words: 17,907 - Favs: 1 - Updated: 8/8/2021 - Published: 8/6/2021 - John S., Steve M. - Complete
As Old As Time by Salchat reviews
From 'Once upon a time' to 'happily ever after,' this is a John and Rodney version of Beauty and the Beast. Some SG-1 characters also feature. Enjoy! [Slash - McShep]
Crossover - Beauty and the Beast & Stargate: Atlantis - Rated: T - English - Romance/Hurt/Comfort - Chapters: 12 - Words: 63,050 - Reviews: 15 - Favs: 2 - Follows: 5 - Updated: 8/8/2021 - Published: 7/16/2021 - [John S., Rodney M.] - Complete
Forks in the Road by Shoshana1385 reviews
Bridging the gap between Seasons 8 and 9. I know there are a ton of these stories, but there are just so many possibilities to explore! This story can follow my Moebius fic, Three Chances to Get It Right, or it can stand alone. I'm including the last scene from that as a prologue here for context. This is primarily an SG1 fic, but there are some Atlantis references.
Crossover - Stargate: SG-1 & Stargate: Atlantis - Rated: T - English - Chapters: 6 - Words: 19,531 - Reviews: 1 - Favs: 3 - Follows: 3 - Updated: 8/7/2021 - Published: 8/5/2021 - S. Carter, D. Jackson, J. O'Neill, Teal'c - Complete
Promets moi d'être heureux by oOoPlumeStilinskioOo reviews
—Ne me dit pas que tu ne vois rien entre Lisa et John ? Ils se passent quelque chose entre eux, je suis certain. Je suis jaloux ! marmonna Mckay en boudant dans son coin, les bras croisés contre son torse, déçu. ( OS, complet)
Crossover - Stargate: Atlantis & Stargate: Universe - Rated: K - French - Romance/Hurt/Comfort - Chapters: 1 - Words: 1,026 - Reviews: 3 - Published: 7/16/2021 - Complete
The Lions of the Valley by ImaliFegen
This is the sequel to the story, "Initial Encounters" and the second part of the series, "A Legacy Left Behind." The Lions of the Valley, picks up the story where we left off Steve & his team, how they wrapped up their operation and glimpses of what goes on the side of the enemy.
Crossover - Stargate: Atlantis & Hawaii Five-0 - Rated: T - English - Adventure/Romance - Chapters: 2 - Words: 16,008 - Favs: 1 - Updated: 7/15/2021 - Published: 7/13/2021 - John S., Steve M., Danny W., Kono K. - Complete
Daughter by guardianranger reviews
Tara, daughter to John Sheppard meets her father and the rest of the Atlantis team. Also goes to live him for awhile on Atlantis,also has special abilities.
Crossover - Stargate: SG-1 & Stargate: Atlantis - Rated: K+ - English - Supernatural/Family - Chapters: 27 - Words: 9,649 - Reviews: 7 - Favs: 13 - Follows: 16 - Updated: 7/8/2021 - Published: 8/12/2009 - D. Jackson, OC, John S.
Omni-Sheppard by DoctorEd17 reviews
John Sheppard had expected a lot of things when joining the Atlantis expedition, but meeting his son from another Universe wasn't one of them. Neither was said son welding a powerful device. Please Read and Review.
Crossover - Stargate: Atlantis & Ben 10 - Rated: T - English - Chapters: 1 - Words: 2,177 - Reviews: 4 - Favs: 13 - Follows: 15 - Published: 7/4/2021 - John S., OC
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