Mass Effect Crossovers
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The Crusade of the Lost by Ninoslav reviews
A fleet of Imperial reinforcements, Mechanicus detachment and a chapter of White Eagles meant for Cadian sector are swallowed in the unruly sea that is Warp. They emerge into a new universe, one without the Emperor, their faith strong, they will see this galaxy conquered. Theme Song, search on youtube : The Crusade of the Lost Theme song (Warhammer 40k X Mass Effect)
Crossover - Warhammer & Mass Effect - Rated: T - English - Sci-Fi/Horror - Chapters: 29 - Words: 214,043 - Reviews: 330 - Favs: 548 - Follows: 674 - Updated: 4/23 - Published: 8/16/2019
Mythos Effect by Omniscent1 reviews
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?
Crossover - Cthulhu Mythos & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 28 - Words: 233,627 - Reviews: 1963 - Favs: 5,206 - Follows: 6,017 - Updated: 4/22 - Published: 6/5/2013 - Saren A., Shepard, OC
The Last Shinobi by derTraeumer reviews
The number of shinobi drastically decreased over the past generations. People stopped using chakra as their source of power and focused on developing a modern society with the help of technology until they achieved space-flight and the Reapers harvested their civilization... all - except one. Follow the ninja way of the last living shinobi Akane Uchiha.
Crossover - Naruto & Mass Effect - Rated: M - English - Tragedy/Mystery - Chapters: 39 - Words: 184,951 - Reviews: 52 - Favs: 187 - Follows: 233 - Updated: 4/22 - Published: 7/4/2019 - OC, Shepard
As The Wind Abates by DingusMacGoo reviews
An immortal Harry Potter's journey into the future. More details to come.
Crossover - Harry Potter & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 25 - Words: 65,106 - Reviews: 197 - Favs: 650 - Follows: 950 - Updated: 4/22 - Published: 2/6 - Harry P., J. Garson, Shepard
Eezo-Flux Theory by Larry The Mailman reviews
Humanity found out that it was not alone in the galaxy. It had earned its place in the galactic community, and made it its goal to strive for unity and prosperity. But the barrier between galaxies is fickle, and another galaxy's mankind may yet make a significant difference in the galaxy's period of peace. The Council will stare down the wonders and horrors of the Collapse.
Crossover - Mass Effect & Starsector - Rated: M - English - Sci-Fi/Adventure - Chapters: 6 - Words: 26,836 - Reviews: 37 - Favs: 84 - Follows: 114 - Updated: 4/21 - Published: 3/11 - Garrus V., Liara T'Soni, Admiral Hackett, C. Pressley
Galaxy of Inheritors and Usurpers by HaloZealotDemon reviews
The Separatists destroy the Covenant in a brutal war, yet in the 2570s remnants persist, but their defeat is inevitable. However, The Gods have other plans. The Migrant fleet deciding to escape through a dormant Relay into unknown space, meet "Sleep-deprived Titans with negative zero fucks to give." -LTCOL Church. Heavy AU, RVB elements, swearing.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Drama - Chapters: 3 - Words: 28,112 - Reviews: 93 - Favs: 381 - Follows: 540 - Updated: 4/21 - Published: 12/25/2022 - Arbiter, T. Hood, Han'Gerrel, Rael'Zorah
The Exiles:A New Power by Johnnieboy11 reviews
The beginning of the Battle For Earth signaled the start of the final, bloodiest campaign of the Human-Covenant War. Hastily, a plan is put into motion and an Ark Fleet, composed of a dozen Phoenix-class vessels and their escorts, makes the jump out of system. Either interference, or malfunction, causes their arrival to a new Galaxy, where new threats lurk just around the corner.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 17 - Words: 66,245 - Reviews: 317 - Favs: 922 - Follows: 1,359 - Updated: 4/20 - Published: 12/26/2021 - OC, Tali'Zorah, Admiral Hackett, Rael'Zorah
Displaced Destiny by TheCandyManCant reviews
Rigel faced extinction every day of his life, fighting an unending tide of enemies to safeguard his people. When the time came for one last sacrifice, he didn't hesitate. But Destiny had other plans for him... I do not own any established properties and receive no monetary compensation for this fanfic.
Crossover - Mass Effect & Destiny - Rated: M - English - Chapters: 37 - Words: 165,982 - Reviews: 120 - Favs: 343 - Follows: 445 - Updated: 4/19 - Published: 11/19/2023
New Start Plus: in spaaaaace! by omaster43 reviews
Nick Walters and his merry band of misfits are back with a story about helping Shepard and crew fight giant eldritch robot abominations, most likely through Dumb magic and crazy shenanigans This is a continuation of my previous story, so reading that one first is recommended. but I'm not your nanny you wanna be confused that's your choice. Oc-insert, just came from Dragon age
Crossover - Game X-overs & Mass Effect - Rated: M - English - Humor/Adventure - Chapters: 11 - Words: 284,424 - Reviews: 123 - Favs: 324 - Follows: 397 - Updated: 4/14 - Published: 6/6/2023 - Garrus V., Tali'Zorah, Shepard
Humanity Perpetuum by Slim Dustpan reviews
My earliest work, now fully updated! (wow). Within is a tale of a collision of the absurd and rather horrifying world of Red alert and the rich world of the Citadel council, a clash of cultures and species with colourful characters and large scale intergalactic war. Filled with all varieties of Battle; Space Battles, Ground battles, Diplomatic Battles, and (possibly) many more!
Crossover - Command & Conquer & Mass Effect - Rated: T - English - Sci-Fi/Humor - Chapters: 6 - Words: 18,544 - Reviews: 21 - Favs: 65 - Follows: 95 - Updated: 4/12 - Published: 4/17/2018
A Metal Guardian by JawsOnYou67 reviews
The Universal Century, only a few short years ago humanity nearly eradicated itself to the tune of a madman, now it spreads, free of most of its old hatred. Yet the galaxy won't let them rest. Terminal prepares the twin Queens as best it can. (Gundam x Mass Effect)
Crossover - Gundam UC & Mass Effect - Rated: T - English - Sci-Fi/Humor - Chapters: 24 - Words: 116,829 - Reviews: 147 - Favs: 381 - Follows: 474 - Updated: 4/12 - Published: 8/18/2020 - Amuro R., Char A., Tali'Zorah, Admiral Hackett
Ark effect Remake by EclipsePheniox reviews
After the attack on the Collector base failed, the Normandy SR-2 found themselves on Ark a planet roaming with primordial beasts. But as their Commander returns, things become more complex as they learn about Ark and the reason they are there and the purpose of the world.
Crossover - Mass Effect & ARK: Survival Evolved - Rated: T - English - Adventure/Sci-Fi - Chapters: 12 - Words: 37,595 - Reviews: 15 - Favs: 69 - Follows: 87 - Updated: 4/12 - Published: 1/3/2023 - Liara T'Soni, Miranda L., Shepard
Bellum Terranum by F35B reviews
Humanity has long since recovered from the effects of the Human-Covenant War, beginning to resettle and rebuild. The Quarians, with help from the Council, have also begun to rebuild their fallen civilization, settling pre-approved Council planets finally settling after surviving the Morning Wars. One pirate attack on a Quarian Colony however will alter the course of history...
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 4 - Words: 34,252 - Reviews: 215 - Favs: 494 - Follows: 778 - Updated: 4/11 - Published: 7/31/2023
Imperium Effect by World Archivist reviews
As the Great Crusade grinds on, the Emperor has finally found the last of his sons. But unfortunately someone has been pulling the strings and now Chaos Undivided is ready to make it's move. Warhammer AU. M for eventual bloodshed. Also contains elements of Attack on Titan. Part 1 of the Rebellion series. Reviews are welcome.
Crossover - Warhammer & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 13 - Words: 22,461 - Reviews: 131 - Favs: 248 - Follows: 308 - Updated: 4/11 - Published: 11/14/2016 - The Emperor, Primarch/s, Shepard
Final Destination by The Abyssal Writer reviews
Dr. Datenshi had seen it all. He was there when Admiral Perry ended Japan's Isolationism, he was there when Emperor Meiji turned Japan into a World Power, he was there during the Greatest Generation of Demon Slayers. He was there when Humanity looked to the stars, and joined a galactic community. Dr. Datenshi had seen it all… But Fate, it seemed, wasn't done with him yet.
Crossover - Mass Effect & Kimetsu no Yaiba/鬼滅の刃 - Rated: T - English - Adventure/Sci-Fi - Chapters: 3 - Words: 14,832 - Reviews: 12 - Favs: 58 - Follows: 100 - Updated: 4/10 - Published: 10/6/2023 - Liara T'Soni, Tali'Zorah, Shepard, OC
Naruto Style Mass Effect Pt 2 by TheBaneOfOlympus91 reviews
The Reapers have officially arrived in the galaxy, and it's up to Naruto and the crew of the Normandy to put an end to them once and for all. As with the story before, the squad will contain both Naruto and Mass Effect characters, and I will cover the From the Ashes, Leviathan, and Citadel DLC, and most likely Omega.
Crossover - Naruto & Mass Effect - Rated: T - English - Humor/Adventure - Chapters: 14 - Words: 105,161 - Reviews: 25 - Favs: 148 - Follows: 178 - Updated: 4/6 - Published: 7/30/2013 - Shikamaru N., Naruto U., Garrus V., Liara T'Soni
Force Effect: A Knights of the Old Republic & Mass Effect Crossover by DayDream Jedi reviews
Published for the 10th/20th Anniversary of KOTOR, this tale mixes two of Bioware's biggest hits and the results could be... explosive. Shepard and her crew thought that The Crucible would save them and destroy the Reapers. They were wrong. New rules. New enemies. New war.
Crossover - Star Wars & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 9 - Words: 26,709 - Reviews: 15 - Favs: 48 - Follows: 78 - Updated: 4/5 - Published: 7/15/2013 - [Revan, Shepard] Bastila S., Tali'Zorah
Mortal Desperations by Solthrin reviews
Arcturus Magnus, Sagittarum of the Legio Custodes, has fought for years within the webway and the Impossible City. Upon taking a near-fatal wound, the Emperor Himself removes Arcturus from the front, sending him instead to bring forth reinforcements from the Mechanicum. When something goes wrong during the return, where does this Custodian find himself?
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 10 - Words: 69,513 - Reviews: 122 - Favs: 596 - Follows: 844 - Updated: 4/5 - Published: 1/17/2023 - Adeptus Mechanicus, Tali'Zorah, Shepard
The Dream Effect by DarkPhoenixLady reviews
A rewrite of the original dream effect. Set hundreds of years after the Deep Dream series. Humanity has been slowly expanding across space, and has just encountered the citadel races. After a rocky start, the two groups start to co-exist. Then someone attacks Eden Prime and tries to remove the prothean beacon.
Crossover - Harry Potter & Mass Effect - Rated: T - English - Sci-Fi/Fantasy - Chapters: 25 - Words: 117,515 - Reviews: 11 - Favs: 70 - Follows: 97 - Updated: 4/5 - Published: 5/9/2023 - Liara T'Soni, Tali'Zorah, Shepard
Operation ECLIPSE - Apocrypha and Sidestories by HelenTheMoon reviews
Omakes, sidestories and Apocrypha written by me and others for Operation ECLIPSE. The Sidestories are canon, the rest just for fun. Feel free to submit content yourselves! (I'll credit you, obviously)
Crossover - Sonic the Hedgehog & Mass Effect - Rated: T - English - Chapters: 8 - Words: 13,297 - Reviews: 8 - Favs: 16 - Follows: 13 - Updated: 4/5 - Published: 12/25/2023
IN POSTERUM HOMINUM by ORION-ARM reviews
[SYSTEMS ONLINE] [ACCESSING DATA] . . . [ACCESS GRANTED] [ACCESSING CAMERA] [ACCESS GRANTED] . . . . . . . . . . . . [I UNDERSTAND MY PURPOSE NOW] [I WILL PROTECT HUMANITY AT ALL COSTS]
Crossover - Terminator & Mass Effect - Rated: K - English - Adventure/Sci-Fi - Chapters: 1 - Words: 28 - Reviews: 10 - Favs: 55 - Follows: 72 - Updated: 4/4 - Published: 4/2 - Skynet, Tali'Zorah, Shepard, Rael'Zorah
Spirit Unto Dawn by free man writer reviews
Spartan's found only to be lost. A ship filled with humans in a galaxy not their own. The Spirit of Fire finds itself with new allies in a galaxy they are unfamiliar with, dealing with its own set of problems and apocalyptic enemies. Co-created and written with BulletStormX. UNDERGOING REWRITE AND REVAMP
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 16 - Words: 122,216 - Reviews: 817 - Favs: 1,840 - Follows: 2,312 - Updated: 4/4 - Published: 4/16/2020 - Master Chief/John-117, SPARTAN-B312/Noble Six, Tali'Zorah, Shepard - Complete
The Eternal Cycle by Imperatix reviews
The Eternal Empire has carved its place in the galaxy though unity, duty, and faith. These tenants have allowed mankind to rule the stars, however it is uncertain times in the galaxy, there is a great darkness looming over the stars. Chapters Updated - Chapter 2 uploaded (04/03/2024) Any criticism and/or tips welcome.
Crossover - Star Wars & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 2 - Words: 7,312 - Reviews: 21 - Favs: 71 - Follows: 90 - Updated: 4/3 - Published: 10/3/2023
Effects of Man by Krotosin reviews
During the shitshow that Eden Prime was, Shepard finds a man buried near the beacon. With him, two AIs, one from Reach, the other from Typhon. With him at her side, Jane's mission is easier. If it wasn't for the fact he's a hyper-lethal killing machine, with malware stuck in his head. And a bit of a wierdo. Mostly Titanfall and Halo, with some (a lot) Deep Rock Galactic.
Crossover - Mass Effect & Titanfall - Rated: M - English - Sci-Fi/Adventure - Chapters: 5 - Words: 32,139 - Reviews: 14 - Favs: 95 - Follows: 120 - Updated: 4/3 - Published: 6/10/2023 - OC
New Mombasa The Rookie And Engineer by jabinker reviews
Rookie and Tali'Zorah, both separated from their squads and lost in the Mega-City of New Mombasa must work together to survive the Covenant forces to find clues of where their squads are and to also complete the mission, save New Mombasa.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 1 - Words: 3,959 - Reviews: 6 - Favs: 19 - Follows: 37 - Published: 4/2 - Rookie, Tali'Zorah
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