Stargate: Atlantis Crossovers
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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 - 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 - 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
Stargate: Discordia by Sin Oan reviews
A Goa'uld scientist comes to Earth to warn the SGC about a plot being hatched by Osiris to restore Goa'uld supremacy over the galaxy. Can she be trusted, or are they being led into an elaborate trap?
Crossover - Stargate: SG-1 & Stargate: Atlantis - Rated: T - English - Sci-Fi/Adventure - Chapters: 17 - Words: 28,761 - Reviews: 6 - Favs: 14 - Follows: 21 - Updated: 9/23/2021 - Published: 6/4/2021 - OC
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 - 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 arrives in Atlantis and meets some of the people living there.
Crossover - Buffy: The Vampire Slayer & Stargate: Atlantis - Rated: T - English - Friendship - Chapters: 15 - Words: 19,546 - Reviews: 16 - Favs: 27 - Follows: 41 - 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: 20 - Follows: 31 - 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 - 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 - 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
Initial Encounters by ImaliFegen reviews
The Ancients fled the Milky Way galaxy after annihilating the enemy they had unknowingly given birth to themselves; or so they thought. What if the enemy was still here? what if they are aligning themselves with others to regain power? Well, it was a good thing some of the Ancients left behind a gift; a legacy to prevent that exact eventuality, wasn't it? But will it be enough?
Crossover - Stargate: Atlantis & Hawaii Five-0 - Rated: T - English - Adventure/Romance - Chapters: 4 - Words: 18,683 - Reviews: 4 - Favs: 1 - Updated: 6/28/2021 - Published: 6/22/2021 - Rodney M., John S., Steve M., Joe W. - Complete
Atlantis Mother of Xander Version 3 by Sentinel1977 reviews
Version 3 of the same Story.
Crossover - Buffy: The Vampire Slayer & Stargate: Atlantis - Rated: M - English - Chapters: 1 - Words: 3,067 - Reviews: 3 - Favs: 12 - Follows: 13 - Published: 6/13/2021 - Xander H., Teyla E., Ronon D.
Atlantis Mother of Xander Version 2 by Sentinel1977
Version 2 of the same Story.
Crossover - Buffy: The Vampire Slayer & Stargate: Atlantis - Rated: M - English - Chapters: 1 - Words: 7,675 - Favs: 11 - Follows: 10 - Published: 6/13/2021 - Xander H., Teyla E., Ronon D.
Atlantis Mother of Xander Version 1 by Sentinel1977
What if Atlantis was more Sentient than first thought and was craving a Motherly connection of some sort.
Crossover - Buffy: The Vampire Slayer & Stargate: Atlantis - Rated: M - English - Chapters: 1 - Words: 9,237 - Favs: 16 - Follows: 16 - Published: 6/13/2021 - Xander H., Teyla E., Ronon D.
Star Wars: Atlantis by James118 reviews
After discovering an Ancient file hidden in Atlantis's database. The team of best people of the Atlantis Expedition goes on the journey into another galaxy. But when they get there, they'll find themselves fighting a new powerful enemy. But they'll also find powerful allies to fight alongside with. OC x Ahsoka and OC x Sabine.
Crossover - Stargate: Atlantis & Star Wars Rebels - Rated: M - English - Adventure/Sci-Fi - Chapters: 5 - Words: 23,726 - Reviews: 8 - Favs: 17 - Follows: 21 - Updated: 6/11/2021 - Published: 3/31/2021 - [OC, Ahsoka T./Fulcrum] [John S., Teyla E.]
Hoglantis: John Sheppard and the Ancient's Gambit by Salchat reviews
Three children meet on the train that will take them to their new lives at Atlantis Academy, a school for children who can use Ancient technology. For John Sheppard this is the beginning of a new and wonderful life, but he also learns that his past holds dark and terrifying secrets... [To be updated on Tuesdays and Fridays.]
Crossover - Harry Potter & Stargate: Atlantis - Rated: K+ - English - Adventure/Friendship - Chapters: 22 - Words: 112,439 - Reviews: 35 - Favs: 7 - Follows: 10 - Updated: 6/11/2021 - Published: 3/28/2021 - Rodney M., John S., Teyla E. - Complete
Home is where the heart is by CPB99
Sam returns to Earth from Atlantis for the holidays. Jack decided to take their relationship to the next level.
Crossover - Stargate: SG-1 & Stargate: Atlantis - Rated: T - English - Romance - Chapters: 1 - Words: 1,081 - Favs: 1 - Published: 6/4/2021 - S. Carter, J. O'Neill
The 24th by Bella Gracelyn Prentiss reviews
(sequel to Changing Waco) For the last five years, life on Earth-38 has been totally chill for Charlie and the Branch Davidians. Charlie loves life with the Branch Davidians. She's finally safe from her sisters. What happens when Charlie gets pregnant? How will her child be different because of Charlie being a former fate?
Crossover - Stargate: Atlantis & Legends of Tomorrow - Rated: K - English - Sci-Fi/Family - Chapters: 37 - Words: 54,055 - Reviews: 3 - Favs: 1 - Follows: 1 - Updated: 5/23/2021 - Published: 4/10/2021 - Charlie - Complete
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