2k+ Death Korps of Justice » by Lord-of-Change A young Death Korp soldier, in a battle with a follower of Chaos, ends up swallowed by the Warp. By a stroke of luck, he's sent to Earth, to a world without an Emperor, to a world where villains and heroes battle it out across the globe. With no Emperor to serve and no war to fight, this young soldier must struggle to find his own path in a world that challenges all his beliefs.
Warhammer & Young Justice, M, English, Sci-Fi & Adventure, chapters: 47, words: 444k+, favs: 3k+, follows: 3k+, updated: 3/13 published: 7/21/2013, Imperial Guard, Deathstroke
459 The Furious Wolf » by SSJ Lone Wolf Years after the Fall of Reach, Noble Six and Auntie Dot find themselves transported back to the early twenty-first century. But when everyone's favourite Lone Wolf crosses paths with Dominic and Mia Toretto, he finds himself becoming apart of their family regardless if he wants to or not. But the question remains, but the end what will remain...man or machine?
Fast and the Furious & Halo, M, English, chapters: 14, words: 93k+, favs: 768, follows: 845, updated: 2/23 published: 10/27/2021, [SPARTAN-B312/Noble Six, Mia]
2k+ On the Illusion of Might » by evevee We thought ourselves powerful, able to conquer a galaxy with nothing but toys. When we overcame every challenge, breached the space between the galaxies themselves, what use were the words of a race ashamed of their own past? Yet we cannot deny that we were warned, for while a challenge to a human is laughable, a challenge to humanity is a death sentence.
Halo & Mass Effect, M, English, Sci-Fi, chapters: 27, words: 297k+, favs: 3k+, follows: 4k+, updated: 2/21 published: 2/21/2017, Master Chief/John-117, Cortana, Garrus V., Shepard
92 Sekirei: The Lost Wolf » by Helghast honored guard The Lonewolf survived and made it off Reach .Now he finds himself trapped in another world, another time and another conflict. Up against a madman forcing a race of super powered aliens to fight to the death to bring a new age of the gods . (Six and Harem)
Halo & Sekirei, M, English, Sci-Fi & Romance, chapters: 13, words: 87k+, favs: 265, follows: 354, updated: 2/7 published: 3/2/2022, SPARTAN-B312/Noble Six, No. 12/Hibiki, No. 11/Hikari, No. 16/Toyotama
707Mass Effect: A Very Terran (Re)solution » by NihilMomentum What would happen if someone with vast knowledge about the Mass Effect Universe, both official (wiki/Codex) and theoretical (fanfics), decent fighting ability and a plan was dropped into that Universe 13 years before Eden Prime? As it turns out, quite a lot! FemShep. Soft HFY. And a very different kind of self-insert.
Mass Effect, M, English, Sci-Fi & Adventure, chapters: 22, words: 323k+, favs: 1k+, follows: 2k+, updated: 1/15 published: 6/18/2022, Liara T'Soni, Thane K., Mordin S., OC
842 Rise of the Terran Alliance » by Raptor2216 Several months after the Battle of Geonosis, the Republic learns that the CIS is exploring into a neighboring galaxy. A Republic search for the CIS results in the discovery of Earth. With the Clone Wars now expanding beyond the galaxy, the Republic aids the people of Earth against the CIS, and the Terran Alliance is born. When the Republic turns to darkness, how will Earth respond?
Star Wars, K+, English, Sci-Fi & Fantasy, chapters: 79, words: 228k+, favs: 714, follows: 574, updated: 1/14 published: 9/25/2019, Anakin Skywalker, Obi-Wan K., Captain Rex, Ahsoka T.
385Slayer's Vengeance » by Jago-Dakari A meeting between a yautja huntress and a human marine turned vengefull slayer will shake the very foundation of both races in this story of adventure, love and loss.
Aliens/Predator, M, English, Sci-Fi & Adventure, chapters: 45, words: 528k+, favs: 675, follows: 590, updated: 1/5 published: 11/30/2011, Human, Predator/Yautja
41 The Legions Lord and Savior » by Jholverson What happens when something the ancient warrior wizards put to rest is awoken by a set of situations meant to be the truly last resort to not only save their line but that of the universe? Ron bashing, New Dumbledore bashing and gratuitous amounts of violence and swearing this is harry potter as I imagined it you don't like it don't read it.
Harry Potter & Warhammer, M, English, Sci-Fi & Fantasy, chapters: 15, words: 24k+, favs: 137, follows: 189, updated: 12/20/2022 published: 3/27/2020, Harry P., The Empire
465 Mass Effect: Murphy's Law » by TacoWrath "Anything that can go wrong, will go wrong", the old saying goes. Survivors of a freak accident that took place in 2023, two brilliant scientists are recruited into Alliance Task Force "Cerebellum" to work on cutting-edge technology alongside other talented minds. Little did they know, their work would slowly end up reshaping the galaxy as an ancient enemy emerged from dark space.
Mass Effect, M, English, Sci-Fi & Friendship, chapters: 121, words: 655k+, favs: 786, follows: 905, updated: 11/15/2022 published: 4/25/2015, OC
3k+ The True Child Of Chaos (old) » by nutsofthechest This isn't your normal chaos story, what if Percy was a natural born son of chaos and adopted by her brother Order? Percy is born on another planet but is forced to go to earth the day he was born. What will happen to him when he is here? Will he ever Rated M: badass fight scenes, lemons, and harem Percy/Hestia, Hera, Artemis, Piper, Zoë, Bianca, Diana#2, Khione, Chaos#2.
Percy Jackson and the Olympians, M, English, Adventure & Romance, chapters: 109, words: 663k+, favs: 5k+, follows: 3k+, updated: 11/4/2022 published: 1/3/2014
2k+ Adas Reborn » by Shahismael Based on The Galactic War challenge by Belgrath on DZ2's forums. During the Battle at the Department of Mysteries, Harry Potter is sent to the Star Wars universe. Arriving two years before Attack of the Clones, this is Harry's story as he grows through the Clone Wars and his return home. An eventual H/Hr, it will develop after harry's return. Not sure which genres to call this one.
Harry Potter & Star Wars: The Clone Wars, M, English, chapters: 40, words: 564k+, favs: 5k+, follows: 5k+, updated: 10/30/2022 published: 6/30/2015, [Harry P., Hermione G.] Count Dooku
57 John 117, The Father of the Clones » by TheExiledStoryTeller After destroying the Halo ring and the Flood, Master Chief ends up in the Star Wars universe due to his half of the Forward Unto Dawn being pulled into slip space. There he is found by the Mandalorians during their civil war. After helping the side that saved him and Cortana win, he becomes a mercenary and is eventually recruited to be cloned on Kamino instead of Jango Fett.
Star Wars & Halo, T, English, Sci-Fi, chapters: 4, words: 15k+, favs: 180, follows: 253, updated: 10/7/2022 published: 9/15/2022, Master Chief/John-117, Cortana
533 Mass Effect: Galaxy at war » by palik A Citadel Exploration fleet filled with people the council didnt want around discovers something that will change the face of Citadel Space forever. The council will experience a crash course in the fight for survival (abandoned)
Halo & Mass Effect, M, English, Sci-Fi, chapters: 29, words: 84k+, favs: 1k+, follows: 1k+, updated: 10/5/2022 published: 6/18/2020
181 A Willing Self-Insert » by Dranz Von Arch A Teenager with a Funny name, an Archer, a blacksmith, an Otaku & Cheff is self inserted to the Game of thrones universe with the powers of Shirou Emiya and a whole house filled with anime and pop culture memorabilia. Warning Ridiculous anime logic Shenanigans , OP Godlike OC! VERY far away from what the cannon was supposed to be. Warning!Sporadic Updates. OC/Lyanna/Illya pairing.
Fate/stay night & Game of Thrones, M, English, Humor & Adventure, chapters: 15, words: 39k+, favs: 697, follows: 820, updated: 9/28/2022 published: 6/30/2020, [Illyasviel von Einzbern, OC, Lyanna S.]
1k+ Mythos Effect » by Omniscent1 A crossover between Mass Effect and Cthulhutech. Humanity has won the Aeon War and has since expanded and thrived. How will the galaxy fare with this new power?
Cthulhu Mythos & Mass Effect, M, English, Sci-Fi & Adventure, chapters: 25, words: 192k+, favs: 4k+, follows: 5k+, updated: 7/9/2022 published: 6/5/2013, Saren A., Shepard, OC
664Fate Calls » by Sci-Fifan95 In life, the only certain thing that applies to us is death. We cannot escape it. We cannot outrun it. It is a fate that finds us all. However, He plays chess. And you don't find out until too late that He's been playing with two queens all along.
Transformers/Beast Wars, T, English, Adventure & Sci-Fi, chapters: 55, words: 755k+, favs: 466, follows: 420, updated: 7/7/2022 published: 11/1/2011, Arcee, Optimus Prime, OC
932Mass Effect: The Iron Heart of Man » by Apollonir [AU] The Illusive Man said that salvation comes with a cost. When corruption seeps into the galaxy, when centuries of status quo suddenly breaks in a mere decade, when blood's spilled among the stars like never before, when extinction looms over civilization, when morality is merely a shade... salvation can only come with sacrifice. [AU First Contact War & Reaper War; GRAPHIC]
Mass Effect, M, English, Sci-Fi & Suspense, chapters: 37, words: 389k+, favs: 2k+, follows: 2k+, updated: 5/28/2022 published: 8/23/2016, Admiral Hackett, Illusive Man, Shepard, OC
59 Beyond Horizon: First Contact » by Lostbasin Horizon Zero Dawn/Mass Effect/Overwatch crossover. The world ended and there was nothing we could do to stop it. Not by the Omnics we fought against, but by the very weapon we made to combat them. It was only the vision of Dr. Sobeck that humanity now has a chance to rebuild out of the ashes of our extinction. But now we're not alone, on our planet or the galaxy at large.
Mass Effect & Horizon Zero Dawn, T, English, Sci-Fi & Adventure, chapters: 4, words: 43k+, favs: 339, follows: 454, updated: 5/13/2022 published: 6/6/2019, GAIA, Elisabet S.
320 The End of Eternity: Rise of the Terran Alliance » by Icarus636 No Gods, No Kings REWRITTEN: Through intervention the dream of Rapture never became a nightmare, instead new technologies and beliefs pave the way for Humanity to unite as one and seek a new future among the stars. The Council finds itself confronting a civilization that has surpassed every technological shackle and overcame every obstacle thrown their way: The Terran Alliance.
Mass Effect & BioShock, T, English, Sci-Fi & Mystery, chapters: 20, words: 233k+, favs: 1k+, follows: 1k+, updated: 2/28/2022 published: 8/6/2019, Tali'Zorah, Shepard, Eleanor L., Elizabeth
770 Audax Novus » by A-01 A bold new world - A strange new reality - Fresh trials, tribulations, allies, and enemies. John fell through the portal from the Mantles Approach, but his luck works in mysterious ways. Now stranded in an alternate reality, how will he strive forward? The galaxy takes a sharp turn from the world we know, and the Reaper threat looms just as large, but no longer so uncontested.
Halo & Mass Effect, M, English, Adventure & Romance, chapters: 25, words: 656k+, favs: 1k+, follows: 2k+, updated: 2/17/2022 published: 9/4/2020, [Master Chief/John-117, Miranda L.] [Shepard, Tali'Zorah]