Scryer

Harry Potter: Geth by mjimeyg Stale Result (Last seen: 2025-07-22)

During the final battle Harry is hit with a luck spell... but who exactly got lucky? Harry finds himself in the future fighting a new war when all he wants to do is have a nice and easy life. So he decides to have fun instead.

Mass Effect - 2014-11-19 Complete - T - Humor/Adventure - Tali'Zorah, Harry P., Shepard, Ashley W. - 276,717 words - 43 chapters - 3,097 reviews - 9,567 favorites - 5,255 follows

Harry Potter and the Alien Reality by Pwn Master Paladin

In the graveyard, Voldemort banished Harry to a new universe. Stranded in a reality of technology, adventure, and snake-like aliens that are bent on galactic conquest, Harry will join with a new group to hopefully find a way home. A group called SG-1.

Stargate: SG-1 - 2016-07-21 In-Progress - T - - J. O'Neill, Harry P. - 146,773 words - 12 chapters - 1,094 reviews - 3,147 favorites - 3,802 follows

Madness at the Gate by ZenoNoKyuubi

The sequel to ItMoaS. Mad scientist Harry Potter, now twenty years old, is sent to the SGC to half-join SG-1, accompanying them on missions. However, this job, which was just supposed to be providing Harry with research and allow him to expand on his knowledge, will have him make grand discoveries about himself and that of the entire magical race. Harry/Tonks/possibly more

Stargate: SG-1 - 2015-06-10 Complete - M - Sci-Fi/Adventure - Anise/Freya, Harry P., N. Tonks - 200,523 words - 34 chapters - 3,715 reviews - 6,371 favorites - 4,989 follows

SG-Harry by feauxen

Harry's been wandering the multiverse for some time, researching the mysteries of magic. When he comes across the SGC, he can't help but wonder why Ancient technology seems to work WITH magic instead of exploding on contact. This inevitably leads to all sorts of trouble, and a wizard in the Pegasus galaxy. Harry's a cheeky genius, but not the MoD or even overpowered. Much.

Stargate: Atlantis - 2020-02-23 In-Progress - T - Adventure/Humor - Harry P., Elizabeth W., Rodney M., Radek Z. - 70,992 words - 12 chapters - 510 reviews - 1,845 favorites - 2,590 follows

In All Things Balance by ffdrake Stale Result (Last seen: 2025-10-11)

A Dark Lord of the Sith, lost in time receives a vision that leads her to a world drowning in the Force. There she is given a chance to build an Empire of her own with Force users who are neither Sith nor Jedi. GreyHarry, rated M for language, violence, and language. Pairings Decided: SB/AB, SI/NT, RL/OC, HP/?

Star Wars - 2016-08-07 Complete - M - Adventure/Sci-Fi - Harry P. - 252,655 words - 20 chapters - 1,305 reviews - 5,170 favorites - 3,552 follows

Invincible by Darth Marrs

"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.

Battlestar Galactica: 2003 - 2019-08-03 Complete - M - Drama/Adventure - Harry P. - 140,082 words - 33 chapters - 2,658 reviews - 3,281 favorites - 2,746 follows

Shadow of the Consortium by alexandertheII Stale Result (Last seen: 2025-10-11)

It has been half a year since the evacuation of the Alliance from Yavin IV. Time Harry and his crew have spent hunting bounties as well as the occasional servant of the Empire. However, it will not be the Empire that poses the newest threat to them, not Vader or Palpatine or even one of their Admirals. It will be greed and a talented man with too much of it. Sequel to "A New World"

Star Wars - 2022-02-06 Complete - M - Sci-Fi/Adventure - Harry P., Leia O., OC - 94,405 words - 22 chapters - 261 reviews - 1,838 favorites - 2,185 follows

Same Song Different Verse by Selector Stale Result (Last seen: 2025-10-11)

Harry thought he had seen it all. As it turned out, not so much.

Star Wars - 2017-06-11 Complete - M - Adventure/Sci-Fi - Aayla S., Shaak Ti, Ahsoka T., Harry P. - 191,500 words - 15 chapters - 701 reviews - 4,125 favorites - 2,918 follows

A Jedi in Dumbledore's Court - Episode III by Mnementh1 Stale Result (Last seen: 2025-10-11)

Harry Potter, Jedi Padawan, is heading back to Hogwarts for his third year. With his Godfather newly freed and uncertainty about his destiny haunting his future, Harry must cope with a plot from the stars to destroy his mentor.

Star Wars - 2024-08-22 In-Progress - T - Adventure - Harry P., Hermione G. - 61,217 words - 15 chapters - 164 reviews - 425 favorites - 648 follows

You Can't Keep An Old Dog Down by Lady FoxFire

HP-SG1 Magic can make anything possible and when you mix in SG1 it's a guarantee that the impossible will happen.

Stargate: SG-1 - 2018-06-11 In-Progress - T - Drama/Humor - J. O'Neill, Harry P. - 78,161 words - 18 chapters - 1,031 reviews - 2,629 favorites - 3,741 follows

Sword and Magic by bluminous8 Stale Result (Last seen: 2025-10-11)

After a devastating battle in the Department of Mysteries, Harry Potter finds himself transported in a strange world in the company of Jedi Knight Aayla Secura. Is this the will of the Force that their two fates intertwine?

Star Wars - 2010-10-27 In-Progress - M - Adventure - Aayla S., Harry P. - 52,101 words - 4 chapters - 467 reviews - 3,132 favorites - 3,208 follows

Harry Potter - Alteran by Sashian

The rebirth of an entire race and society is a tall order when this and other galaxies are not safe. What is Harry to do? What he does best, jump in feet first. Rating T for some language and mentions of nudity later on. Pairings HP/HG/LL/other

Stargate: SG-1 - 2017-09-19 Complete - T - Sci-Fi/Adventure - Harry P., Hermione G., Luna L. - 196,908 words - 25 chapters - 1,617 reviews - 4,017 favorites - 3,618 follows

Si Vis Pacem, Para Bellum by In Defilade

AU. Abducted by Loki, rescued by Thor, Harry grows up fast in a much wider universe than he ever imagined existed. Trained extensively by the Asgard, he is now ready to set his own course in life. The Goa'uld need to be dealt with, and he has questions concerning his own past and powers - the answers to which will only be found on Earth, at Hogwarts ... whatever the hell that is.

Stargate: SG-1 - 2014-04-07 In-Progress - T - Sci-Fi/Adventure - S. Carter, Harry P., Hermione G. - 52,311 words - 5 chapters - 656 reviews - 2,117 favorites - 2,800 follows

Cipher 9 by Tylanoid Stale Result (Last seen: 2025-10-11)

All my life I had no control. Not when I was with the Dursleys on Earth, and certainly not when I ended up on Nar Shaddaa as a pickpocketing street-kid. Joining the Sith Empire's Imperial Intelligence was supposed to bring order to that chaos. But one awfully timed invitation to magical school later, and my control was stripped once again. Dark Harry, non-forceuserHarry.

Star Wars - 2023-05-07 In-Progress - T - - Harry P., Albus D. - 75,617 words - 12 chapters - 213 reviews - 708 favorites - 999 follows

Chronicles of the Galactic Coalition by ThePhantomMedjay

In 2600, Terran Society is unified together by diverse species with highly advance technologies from magic, science, and magi-tech, the Terran Trinity. It is their influence and strength to combat the galactic threat that truly changes the known world for the better. All amid internal strifes, ambitious megastructures, and Terran-kinds resilient nature to face the ultimate test.

Mass Effect - 2024-06-19 In-Progress - T - Sci-Fi/Adventure - Harry P., U. Wrex, U. Grunt, Aethyta - 70,501 words - 1 chapter - 15 reviews - 133 favorites - 164 follows

HPSW Episode I: The Chosen One by The Dark Underlord Stale Result (Last seen: 2025-10-11)

HP/SW Crossover. After Harry kills Voldemort, the Dark Lord's last spell transports the trio to Tatooine after Qui-Gon escaped Lord Maul. See Chapter 1 for a full summary.

Star Wars - 2020-03-03 Complete - T - Adventure/Sci-Fi - Harry P. - 120,607 words - 12 chapters - 418 reviews - 1,710 favorites - 1,946 follows

Ex Astris Gloria by alienyouthct

When the true nature of the Veil of Death is finally discovered, Harry and Luna embark on a journey unlike anything they could have possibly imagined. An authorized reimagining of Lightning among the Stars. "f*ck this is good! and fun! I don't want to read the story this is based on because nothing shall distract me from this!" - papiliokaze

Mass Effect - 2019-05-14 In-Progress - M - Sci-Fi/Romance - Harry P., Luna L., Miranda L., Aria T'Loak - 91,947 words - 25 chapters - 702 reviews - 2,557 favorites - 3,273 follows

DLP 3.14

Lost Magic: First Contact by MightyFish Stale Result (Last seen: 2025-07-22)

A man is left trapped in time, while his world dies around him. Now awakened in the distant future, he leaves the planet of his birth and embarks on a journey to find that which was lost. But the new frontier holds many dangers, and the human race is about to face its first great challenge. A HP/ME crossover. Slow pace, rated M for safety, my profile has more details.

Mass Effect - 2015-07-25 In-Progress - M - Adventure/Sci-Fi - Harry P. - 162,448 words - 10 chapters - 727 reviews - 2,573 favorites - 3,168 follows

Harry Potter and the Next Great Adventure by AmateurFanfic

The war is over, and the sheep of the wizarding world have once again begun to turn their backs on him. In hopes of avoiding the hostility of the public and the greed of the Ministry, Harry embarks on a journey that will take him to a new life. Repost ch

Stargate: SG-1 - 2013-05-14 In-Progress - M - Adventure/Sci-Fi - S. Carter, Harry P. - 121,781 words - 14 chapters - 1,261 reviews - 3,683 favorites - 4,153 follows

Written in the Stars by Sorcerer Ra Stale Result (Last seen: 2025-10-11)

Harry Potter won the war against Lord Voldemort. However he loses everything and lost what will to live. Desperate to fix Dumbledore's scheme and plan, he attempts ritual to send him back into the past. Instead he ends up in another Galaxy. What's a Wizard to do when he meets a beautiful young Jedi that ends up more than he expected. Harry Potter and Jaina Solo Paring.

Star Wars - 2018-01-27 In-Progress - M - Adventure/Sci-Fi - Jaina S., Harry P. - 56,626 words - 18 chapters - 792 reviews - 2,558 favorites - 3,076 follows

First Contact by inwardtransience Stale Result (Last seen: 2025-10-11)

Beth already had a bad feeling that her fifth year at Hogwarts was going to turn out to be pretty miserable — as pessimistic as she was, she hadn't seen a literal alien invasion coming. Because apparently the infamous Potter luck was screwing over the whole planet now. (eventual F/F) [Dimitran Fleet, part 1/4]

Star Wars - 2025-02-05 Complete - M - - Harry P., Hermione G., Sirius B. - 356,910 words - 35 chapters - 148 reviews - 392 favorites - 469 follows

The Lightsaber by Tellemicus Sundance Stale Result (Last seen: 2025-10-11)

A childhood love, combined with magical experimentation, and a determination to see his project brought to life. This was all it took to change the world...forever. (A/N: Based on numerous reviews, 'suspension of belief' is evidently required to enjoy this story)

Star Wars - 2019-05-03 Complete - T - Adventure/Spiritual - Harry P., Voldemort, Dudley D. - 173,879 words - 26 chapters - 1,186 reviews - 2,655 favorites - 2,520 follows

Earth's Jedi I: The Purple Light by Maksimme Stale Result (Last seen: 2025-10-11)

After three years of constantly ending up in dangerous situations, Harry realise that he can't just rely on only his wand anymore. The idea of building his own weapon come to him but it isn't until Harry watches the Star Wars trilogy with Ron and Hermione that he realise what that weapon could be. Two months later, with Mr. Ollivander's help, Harry had his own working lightsaber.

Star Wars - 2021-12-11 In-Progress - T - Adventure/Sci-Fi - Harry P., Gabrielle D., Hermione G., Ron W. - 84,430 words - 18 chapters - 218 reviews - 1,293 favorites - 1,672 follows

Shadow Knight by Sorcerer Ra Stale Result (Last seen: 2025-10-11)

Harry Potter finds himself in a Galaxy Far, Far Away. Task by the Ancient Masters Satele Shan and Darth Marr, he must stop the Galactic Empire before they destroy the very existence of the Force. In the process, he will set his own legend in the galaxy. A Leader is born, a Resistance Shall rise, and the Force shall be Free. More Inside

harem

Star Wars - 2018-03-07 In-Progress - M - Adventure - Leia O., OC, Jyn E., Harry P. - 56,535 words - 13 chapters - 478 reviews - 2,095 favorites - 2,446 follows

Space Wizards: Dawn of the DSF by yoden

A sequel to Esama's "Wizards IN SPACE" on Ao3. Book 1: As the crew of an alien spaceship, Harry and the DA must make their own place in a world torn by war. Between discovering the secrets of alien tech, creating their own, fighting for survival and building up an international organization, they are up for an interesting year.

Stargate: SG-1 - 2024-07-07 Complete - T - Adventure/Drama - Harry P., Albus D. - 102,935 words - 19 chapters - 149 reviews - 427 favorites - 551 follows

Search: HP/Sci-Fi Mix, >50k