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Contact by
KE12 reviews
AU: Humanity failed to conquer FTL, having no Eezo in Sol, but they did manage to conquer many other technologies which have allowed them to become the masters of their solar system, but what happens when the Citadel Council stumble across them in the year 3517AD? The Citadel wants their technology, and Humanity wants out of Sol, but can a deal be struck?
Mass Effect - Rated: K+ - English - Sci-Fi - Chapters: 6 - Words: 39,949 - Reviews: 145 - Favs: 560 - Follows: 849 - Updated: 1h - Published: 4/3 - Shepard (F), Shepard (M), Councilor Tevos
A Different Road Taken by
Redrover117 reviews
In 1928 an alien artefact was discovered in Egypt and activated for the first time a few years later. In one reality Doctor Littlefield stepped through and was stranded on the planet Heliopolis for decades. In this reality he arrived on another planet entirely, one that house an Ancient Repository.
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi/Adventure - Chapters: 16 - Words: 49,416 - Reviews: 220 - Favs: 310 - Follows: 438 - Updated: 8/31 - Published: 9/23/2018
Lex Marks The Spot by
dogbertcarroll reviews
YAHF: The Other Side of the Coin. Xander Harris finds himself inside Lex Luthor's body in the DC Universe. He's sure his friends will eventually rescue him, so he decides to toss a few monkey wrenches into the workings of the universe while he's there. Everyone has to have a hobby after all.
Crossover - Buffy: The Vampire Slayer & DC Superheroes - Rated: T - English - Humor/Sci-Fi - Chapters: 25 - Words: 62,487 - Reviews: 1692 - Favs: 3,147 - Follows: 3,151 - Updated: 8/9 - Published: 6/1/2017
For Earth and All Her Colonies by
GADPELLAEON reviews
Post Human-Covenant War AU. After the Great War, all the UNSC wants to do is rebuild and live in the peace. A peace that so many died for. What happens when they learn that no matter what, war will always find them. Chapters Updated - Chapter 11 uploaded (07/08/2019) Any criticism and/or tips welcome.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 11 - Words: 73,828 - Reviews: 368 - Favs: 873 - Follows: 1,288 - Updated: 8/7 - Published: 12/27/2018 - Master Chief/John-117, Arbiter, Shepard (F), Councilor Tevos
Tarkin's Fist Episode III The Earth Strikes Back by
AshlaTi reviews
Bringing the war to Star Wars. Both sides will be brought to their knees. The ultimate victory may not be winning but simple survival. Stomtroopers, TIE fighters, Jedi, Emperors, Presidents, AT-ATs, Moffs, Scoundrels and Zealots all collide over control of the Sol System
Star Wars - Rated: K+ - English - Adventure/Fantasy - Chapters: 78 - Words: 635,938 - Reviews: 1658 - Favs: 257 - Follows: 248 - Updated: 8/3 - Published: 11/30/2013 - Grand Moff Tarkin, Commander Cody
Harry Potter: Force Adept by
Methos Momomax reviews
Summary: During the summer after Harry Potter's second year, a timely letter from his mother appears before him on his birthday. Harry finds out that Lily Potter was never a blood sister of Petunia Dursley nee' Evans, but the long lost daughter of Grandmaster Ben Skywalker and Lady Vestara Khai. Harry's Fate and the Magical World will change forever.
Crossover - Star Wars & Harry Potter - Rated: T - English - Adventure/Fantasy - Chapters: 24 - Words: 164,744 - Reviews: 875 - Favs: 2,897 - Follows: 3,745 - Updated: 8/3 - Published: 6/13/2017 - [Harry P., Hermione G., Susan B., Daphne G.]
Invincible by
Darth Marrs reviews
"You are gathered here today because the world is going to end within the next three years," Hermione said succinctly. "But my husband, having died before, is in no hurry to do so again. We are here to try and save wizard kind itself." A Harry Potter/Battlestar Galactica Crossover, with a touch of 2012 fused in for the fun of it. Obviously not Epilogue Compliant.
Crossover - Harry Potter & Battlestar Galactica: 2003 - Rated: M - English - Drama/Adventure - Chapters: 33 - Words: 140,082 - Reviews: 2375 - Favs: 2,133 - Follows: 2,315 - Updated: 8/3 - Published: 12/29/2018 - Harry P. - Complete
Star Effect by
stormwolf3710 reviews
What if something was found on the moon and a entire universe was created to hide its secrets? What if Earth used those designs to create their own navy? And what if it was the Asari who first made contact? A idea I've been sitting on for some time.
Crossover - Star Wars & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 2 - Words: 19,157 - Reviews: 65 - Favs: 411 - Follows: 613 - Updated: 7/30 - Published: 7/22/2018
Proud Parents by
RobSt reviews
Despite how impossible it seemed, Harry was sure his dad had saved the three of them from the dementors. After Hermione's time turner took them both back three hours, he was desperate to discover if who he'd seen casting that patronus was truly his dad. Harry certainly wasn't disappointed when his mum turned up instead, and changed the entire course of his life. Harry/Hermione
Harry Potter - Rated: M - English - Chapters: 20 - Words: 138,189 - Reviews: 3758 - Favs: 4,407 - Follows: 6,265 - Updated: 7/27 - Published: 3/25/2018 - [Hermione G., Harry P.]
Harry Potter and The Chance at a New Life by
kossboss reviews
A small change in Harry's battle with the Basilisk had him slowly absorbing Voldemort's memories from the Horcrux in his scar. Follow Harry as he makes preparations to leave the Wizarding world behind for good and embark on a long and exciting journey into the unknown. Little does Harry expect to be launched into a world of false gods and spaceships. Smart/Powerful/Grey Harry.
Crossover - Stargate: SG-1 & Harry Potter - Rated: T - English - Adventure/Sci-Fi - Chapters: 15 - Words: 190,032 - Reviews: 1756 - Favs: 3,792 - Follows: 4,828 - Updated: 7/26 - Published: 1/7/2018 - S. Carter, D. Jackson, J. O'Neill, Harry P.
Stark Wars by
AGoodDay2You reviews
A crossover written by someone who hasn't seen either of the franchises yet.
Crossover - Star Wars & Avengers - Rated: T - English - Sci-Fi/Adventure - Chapters: 25 - Words: 132,036 - Reviews: 473 - Favs: 1,161 - Follows: 1,416 - Updated: 7/11 - Published: 12/2/2017 - Obi-Wan K., Jango Fett, Bail O., Iron Man/Tony S.
The Leviathan and The Relic by
Ludum reviews
The fleeing refugees of the 12 Colonies encounter the UNSC Infinity. It seems that their problems are over as the UNSC can easily steamroll the Cylons with just this one ship. But what if the Cylons knew of a weapon that can wipe out all humanity more efficiently than nuclear bombardment of 12 planets?
Crossover - Halo & Battlestar Galactica: 2003 - Rated: T - English - Chapters: 1 - Words: 4,768 - Reviews: 39 - Favs: 104 - Follows: 164 - Published: 6/23
Unintended consequences by
fanfictionfanaticX reviews
A small change in the past by SG-1 may have unexpected side effects for the rest of the galaxy.
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: T - English - Chapters: 14 - Words: 241,429 - Reviews: 312 - Favs: 416 - Follows: 604 - Updated: 6/13 - Published: 6/17/2018
United we Stand by
Mayto reviews
At the height of the Human Covenant war, another galactic power intervenes to aid the embattled humans. Standing side by side with the Turians, the UNSC prepares for a new phase of the Human Covenant war.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 31 - Words: 84,861 - Reviews: 302 - Favs: 377 - Follows: 558 - Updated: 6/1 - Published: 3/26
Jimmy Evans by
TheNewJeniferChurch reviews
Harry runs away to America and eventually joins the Air Force under an assumed name. He ends up on SG-20, and is captured by Herur. His host is damaged, so he tries to take Harry as a replacement. Big mistake. Chapter 3 is up.
Crossover - Stargate: SG-1 & Harry Potter - Rated: T - English - Adventure/Drama - Chapters: 3 - Words: 11,899 - Reviews: 117 - Favs: 659 - Follows: 1,208 - Updated: 4/30 - Published: 1/24 - S. Carter, D. Jackson, J. O'Neill, Harry P.
Gryffindor's Girl by
SilverStarwolfe reviews
When a magical backlash causes a rift in space and time, Mary Jane Potter gains the memories of her male counterpart. Sure that she has just years before her inevitable death, Mary works to defeat Voldemort and keep her friends and family safe. Only fate fights her at every step, making her task even more difficult. Fem!Harry. Not shippy. Hard T for language and violence.
Harry Potter - Rated: T - English - Humor/Drama - Chapters: 29 - Words: 200,396 - Reviews: 407 - Favs: 1,174 - Follows: 1,593 - Updated: 3/20 - Published: 9/2/2015
A New Sunrise by
Z.R. Stein reviews
Fifty years after the Infinity War decimated half of Earth's population, a Quarian ship jumps through the Charon relay, pulling the Nations of Earth into the intrigue of the wider galaxy. Homebrew futuristic MCU.
Crossover - Mass Effect & Avengers - Rated: T - English - Sci-Fi/Adventure - Chapters: 2 - Words: 8,775 - Reviews: 16 - Favs: 113 - Follows: 173 - Updated: 3/18 - Published: 3/12
Yuletide Blessing in Disguise by
Gandalf's Beard reviews
When Harry panics about finding a dance partner for the Yule Ball, McGonagall takes charge...
Harry Potter - Rated: T - English - Romance - Chapters: 31 - Words: 120,521 - Reviews: 663 - Favs: 1,468 - Follows: 2,230 - Updated: 2/11 - Published: 12/25/2017 - [Harry P., Hermione G.]
When Harry Met Yoda by
Traban16 reviews
A long time ago, the night Harry Potter came across Yoda was the same night that everything changed for the galaxy far, far away...
Crossover - Star Wars & Harry Potter - Rated: T - English - Adventure/Humor - Chapters: 15 - Words: 130,057 - Reviews: 365 - Favs: 1,497 - Follows: 1,974 - Updated: 1/26 - Published: 10/23/2015 - Yoda, Ahsoka T., Harry P., Luna L.
Shiver me Timbers! by
wolfd890 reviews
He'd slumbered in Hoth's cold embrace for millennia before being exhumed by the Alliance. Could he help them defeat the Empire? A HP SW crossover(obviously)
Crossover - Star Wars & Harry Potter - Rated: M - English - Adventure/Humor - Chapters: 12 - Words: 96,913 - Reviews: 1079 - Favs: 3,672 - Follows: 5,243 - Updated: 1/25 - Published: 12/18/2015 - Luke S., Leia O., Harry P.
A Different Professor by
AsphodelWolf15 reviews
"Her skeleton will lie in the chamber forever." Ginny has been taken to the Chamber of Secrets and Harry may know where that is. How would things have turned out if he had gone to a Different Professor?
Harry Potter - Rated: T - English - Adventure/Drama - Chapters: 35 - Words: 325,906 - Reviews: 1935 - Favs: 4,401 - Follows: 5,877 - Updated: 1/13 - Published: 5/16/2016 - [Harry P., Hermione G.]
Independence Day: Mass Contact by
D'terran reviews
Over 150 years after the War of 1996, the United Systems Alliance now has to face the wider galaxy with fewer ships, better tech, and a fear of alien species caused by a war that united the world against a very real alien threat. Now they have new troubles on the horizon...
Crossover - Mass Effect & Independence Day - Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 9,630 - Reviews: 70 - Favs: 267 - Follows: 355 - Updated: 12/29/2018 - Published: 8/11/2018
What The by
cvtisjustok reviews
A rebounded spell causes Harry's soul to travel to the end of his second year. Strange magic causes a unexpected result. Determined Harry, Good but misguided Dumbledore.
Harry Potter - Rated: T - English - Chapters: 27 - Words: 82,605 - Reviews: 464 - Favs: 1,065 - Follows: 1,666 - Updated: 12/25/2018 - Published: 5/28/2016 - Harry P., Sirius B., Dobby
To Conquer by
WolftheForsaken reviews
Nuking Ra's spaceship as it was about to enter hyperspace was a bad idea, as young Harry Potter is about to find out. Competent Harry, Competent Dumbledore, Political intrigue, magic in space, Sort of Dark Lord Potter but there's no such thing as Dark Magic. Harry out to conquer the magical word for it's own good, then space, just because he can.
Crossover - Stargate: SG-1 & Harry Potter - Rated: T - English - Sci-Fi/Adventure - Chapters: 9 - Words: 31,018 - Reviews: 524 - Favs: 1,608 - Follows: 2,191 - Updated: 11/26/2018 - Published: 2/25/2017 - Ra, Harry P.
A Hope for the Future by
zheuse reviews
The Endeavor Project was a chance for a father to give a future for his children and grandchildren, away from the chaos of the wars and governments of the Empire and New Republic. The politics may be different, but enemies will always exist, and maybe allies as well. PROLOGUE AND CHAPTER 32 POSTED
Crossover - Star Wars & Stargate: Atlantis - Rated: T - English - Sci-Fi - Chapters: 33 - Words: 80,117 - Reviews: 78 - Favs: 95 - Follows: 123 - Updated: 11/12/2018 - Published: 2/26/2018
Choose your own Award by
dogbertcarroll reviews
Sacrificing yourself for others is always a noble act and such an act deserves a reward... but all that glitters is not gold. However, if you're clever enough you may still find some value in it. Xander takes his 'reward' and turns the universe on its head once more thanks to an old Indian parable.
Buffy: The Vampire Slayer - Rated: T - English - Supernatural/Humor - Chapters: 8 - Words: 19,516 - Reviews: 251 - Favs: 1,009 - Follows: 957 - Updated: 11/11/2018 - Published: 8/3/2018
Voice In My Head by
JustAnotherObsessedFangirl reviews
When the twins locked Percy in a tomb while in Egypt Percy found a Jar with a Tok'ra inside.
Crossover - Stargate: SG-1 & Harry Potter - Rated: K - English - Chapters: 8 - Words: 9,379 - Reviews: 43 - Favs: 114 - Follows: 196 - Updated: 10/4/2018 - Published: 9/17/2018 - Percy W.
A Paragon of Magic by
Alex Blackclaw reviews
Shepard finally did it. She had destroyed the Reapers, just as she promised she would. However, things didn't go according to plan. Instead of dying or maybe falling to Earth with the wreckage of the Crucible, she instead finds herself thrown into a life she never lived, facing things that were only fairy tales to her. Join Morgana Lilian Shepard as she takes on a whole new world!
Crossover - Harry Potter & Mass Effect - Rated: T - English - Adventure/Romance - Chapters: 5 - Words: 41,282 - Reviews: 96 - Favs: 219 - Follows: 342 - Updated: 8/30/2018 - Published: 7/15/2018 - [Shepard (F), Liara T'Soni]
The Spirit of Humanity by
Kazlin reviews
After decades of ponderous travel through space the UNSC Spirit of Fire stumbles across the drifting tomb of Humanities greatest hero. Within the ship they find the means of possibly making it home, but to get there they will have to make alliances that could upend the balance of power in the Galaxy and change everything the Council races thought true.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 4 - Words: 16,964 - Reviews: 148 - Favs: 491 - Follows: 848 - Updated: 8/3/2018 - Published: 5/24/2018
Acceptance by
AsphodelWolf15 reviews
If Vernon and Petunia were so concerned about their image why did they treat Harry the way they did? A child with a bad reputation living in their house forced them to tell tales, when it would have been much easier if they treated him like part of the family. How would Harry have turned out if he was accepted? (This is not for Dumbledore fans)
Harry Potter - Rated: T - English - Friendship/Adventure - Chapters: 18 - Words: 121,566 - Reviews: 702 - Favs: 2,049 - Follows: 2,944 - Updated: 7/4/2018 - Published: 5/20/2016 - Harry P., Neville L.
Beyond The Veil by
NaniteSystems reviews
After the Battle of Hogwarts Harry finds himself rising through the ranks of the Ministry's Unspeakables. All is well until one day a strange set of runes carved into the base of the Veil of Death catches his eye. After a hint from the Hallows, Harry steps through the Veil and into a strange new world. But not all is as it seems. Threats both old and new lurk in the darkness.
Crossover - Harry Potter & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 21 - Words: 192,665 - Reviews: 934 - Favs: 3,880 - Follows: 5,036 - Updated: 6/26/2018 - Published: 9/2/2016 - [Harry P., Shepard (F)]
Effloresco Secundus by
romanescue reviews
Harry was never the only person with a penchant for tripping into the most absurd of situations. Reincarnated!Hermione. Somewhat darker than the usual take on Naruto. Political machinations. Character progression. Strong friendship, no romance.
Crossover - Harry Potter & Naruto - Rated: M - English - Drama/Friendship - Chapters: 34 - Words: 216,750 - Reviews: 4107 - Favs: 6,544 - Follows: 7,551 - Updated: 6/15/2018 - Published: 9/14/2012 - Hermione G., Sakura H., Team Seven
Crestfallen by
Lionna reviews
When Harry lands on Asgard, he doesn't expect to be besieged almost immediately by two gods and a giant wolf. But he's always been the adaptable sort. (No pairing.)
Crossover - Harry Potter & Avengers - Rated: T - English - Humor/Supernatural - Chapters: 31 - Words: 65,278 - Reviews: 5189 - Favs: 10,718 - Follows: 13,458 - Updated: 5/10/2018 - Published: 7/11/2012 - Harry P., Thor
It All Started When Harry Stole a Police Car by
Lucillia reviews
Thanks to a bit of Grand Theft Automobile, Dumbledore's meddling, and some wards that were working a little too well, Little Whinging has a new Police Constable who is all of ten years old.
Harry Potter - Rated: K+ - English - Humor - Chapters: 2 - Words: 3,769 - Reviews: 207 - Favs: 922 - Follows: 1,148 - Published: 6/23/2017 - Harry P., Petunia D., Dudley D., Vernon D.
A Future Imperfect by
Naitch03 reviews
The sequel to 'Past is Prologue! 8 Months ago they were sent back to change the future. Now they have to figure out how to do that- without making Oliver too suspicious, and while fighting back against an unseen enemy. No one ever said changing the future would be easy. Starting out easy, but rated 'M' for future chapters.
Arrow - Rated: M - English - Drama/Adventure - Chapters: 3 - Words: 35,458 - Reviews: 204 - Favs: 382 - Follows: 447 - Updated: 6/5/2017 - Published: 10/31/2016 - Oliver Q./Arrow/Green Arrow, Thea Q., Felicity S./Overwatch, Malcolm M./Dark Archer
The Slayer's New Hope by
lateVMlover reviews
Set in season 5 of Buffy. When Joyce realizes she's sick, she decides it's time to tell her daughters the truth about who their father is. This story will feature SG-1 characters but set primarily in Sunnydale. Teal'c most featured SG-1 character besides Daniel. Jack, Cameron Mitchell, and Sam also featured.
Crossover - Buffy: The Vampire Slayer & Stargate: SG-1 - Rated: K+ - English - Drama/Family - Chapters: 20 - Words: 74,912 - Reviews: 100 - Favs: 235 - Follows: 213 - Updated: 5/27/2017 - Published: 11/22/2016 - Buffy S., Dawn S., D. Jackson, Teal'c - Complete
Hammer of the Gods by
Jus Sum Dude reviews
When a powerful Taur'i weapon falls into the hands of the 12 Colonies, all eyes in the galaxy turn to the children of Kobol and their robotic adversaries. (I'll be honest... I'm really just here for the space battles. What can I say? I like it when things go boom.)
Crossover - Stargate: SG-1 & Battlestar Galactica: 2003 - Rated: T - English - Chapters: 4 - Words: 11,517 - Reviews: 50 - Favs: 85 - Follows: 150 - Updated: 1/16/2017 - Published: 11/29/2016
Frame of Reference by
332249 reviews
OR Five times the SGC didn't realize they were dealing with the supernatural and One time the Winchesters didn't realize they were dealing with an alien.
Crossover - Stargate: SG-1 & Supernatural - Rated: T - English - Chapters: 1 - Words: 3,230 - Reviews: 14 - Favs: 31 - Follows: 4 - Published: 12/24/2016 - Complete
The Search for Victory by
Morena Evensong reviews
During the hunt for Hydra, SGC operations are stalled. But the Ori's armies are still coming and Earth isn't any closer to coming up with anything that can stop them. Frustrated, Daniel takes a vacation and accidentally uncovers a clue to what could be an Ancient weapon. Against protocol, against orders, he and his friends set out on a desperate quest to find a way to save Earth.
Crossover - Stargate: SG-1 & Avengers - Rated: K+ - English - Sci-Fi/Adventure - Chapters: 38 - Words: 283,425 - Reviews: 528 - Favs: 516 - Follows: 502 - Updated: 9/23/2016 - Published: 10/6/2014 - D. Jackson, Black Widow/Natasha R., Captain America/Steve R., Hawkeye/Clint B. - Complete
A Village Hidden In Hope by
Marz1 reviews
Naruto botches his first attempt to summon and ends up in a land without Ninja. Now a bunch of monks called Jedi think he's up to no good, the only way home may require the Darkside aka the Fox, and home may no longer be there.
Crossover - Star Wars & Naruto - Rated: T - English - Adventure/Sci-Fi - Chapters: 13 - Words: 83,740 - Reviews: 1385 - Favs: 3,144 - Follows: 3,653 - Updated: 9/17/2016 - Published: 11/25/2007 - Anakin Skywalker, Naruto U.
When Worlds Collide by
KakashiKrazed reviews
What might happen if Kakashi and Madara's Mangekyo techniques collide? One thing was for certain, Kakashi would have never expected to be thrown into a world where archaeologists and false gods would hold his life in the balance.Can Kakashi make it home?
Crossover - Stargate: SG-1 & Naruto - Rated: T - English - Friendship/Sci-Fi - Chapters: 18 - Words: 114,747 - Reviews: 591 - Favs: 799 - Follows: 959 - Updated: 8/8/2015 - Published: 12/24/2010 - D. Jackson, Kakashi H.
Wand and Shield by
Morta's Priest reviews
The world is breaking. War and technology push on the edge of the unbelievable as S.H.I.E.L.D. desperately tries to keep the peace. Soldier and scientist no longer hold the line alone, as an ancient fire burns alongside them. The last of all wizards.
Crossover - Harry Potter & Avengers - Rated: T - English - Adventure/Supernatural - Chapters: 33 - Words: 260,787 - Reviews: 7247 - Favs: 14,211 - Follows: 15,889 - Updated: 7/22/2015 - Published: 6/2/2012 - Harry P.
Discordant by
Heather Sinclair reviews
It wasn't the bright and shiny Jewel of the Galaxy you've all seen on the HoloNet. Harry's story started in the Underworld, a kilometer below the upper levels of Coruscant, where you never walk the streets alone, especially if you don't have a blaster hanging by your side. He left for a little while, but now it's called him back, whether he realizes it or not.
Crossover - Star Wars & Harry Potter - Rated: T - English - Sci-Fi - Chapters: 8 - Words: 45,270 - Reviews: 436 - Favs: 2,282 - Follows: 2,663 - Updated: 3/8/2014 - Published: 1/12/2014 - A. Ventress, Harry P.