Mass Effect Crossovers
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Maelstrom Effect Book 2: Shadows of Crimson by godospartan the Kitsune reviews
After Soverign's defeat, the sibling Commanders left to clean up the mess it left behind. But one of them was struck down by an unknown force. The next 2 years they go in search of the ones responsible, unknowing that a secret group is bringing their sibling back to life to fight the Reapers again. How will they react when they meet again? NaruxTali, Shakarian, Mature content later
Crossover - Naruto & Mass Effect - Rated: M - English - Sci-Fi/Hurt/Comfort - Chapters: 15 - Words: 174,920 - Reviews: 82 - Favs: 356 - Follows: 407 - Updated: 4/26 - Published: 12/25/2019 - Naruto U., J. Garson, Garrus V., Tali'Zorah
The Warlock's Garden by LilKittyCatty reviews
After the Witness left the gaping portal on the Traveler, the Vanguard sent its best Warlock to research it. But when his ship doesn't come back, he is presumed lost. But unknown to the Vanguard, in a different reality, a billion years before humanity reached for the stars, a strange ship emerges from a rift in space. The Warlock shall create his Garden, and his knowledge be known.
Crossover - Mass Effect & Destiny - Rated: M - English - Adventure/Sci-Fi - Chapters: 2 - Words: 1,245 - Reviews: 1 - Favs: 24 - Follows: 42 - Updated: 4/26 - Published: 4/23 - Shepard, OC, OC
The Rook by Twisted Fate MK 2 reviews
On the way down to New Mombasa, Rookie falls into the Slipspace Rupture and ends up crashing down on Menae, high above Palaven, right in the midst of the Reaper War. From there, the war itself will shift and the fighting persists, but who knows what an ODST will add to the mix. (Redo of an older story)
Crossover - Halo & Mass Effect - Rated: M - English - Adventure - Chapters: 22 - Words: 76,877 - Reviews: 154 - Favs: 544 - Follows: 813 - Updated: 4/26 - Published: 7/8/2022 - Rookie, Shepard
Batarian-Imperial war by Unknown8471 reviews
The galactic empire sends an expedition into the milky way galaxy and comes into contact with the batarian hegemony. At the end, the empire is triumphant how does this affect the rest of the galaxy.
Crossover - Star Wars & Mass Effect - Rated: T - English - Chapters: 1 - Words: 337 - Reviews: 1 - Follows: 3 - Published: 4/24
An Unlikely Ally by J0llyGood reviews
After the human-covenant war the UNSC was starting to rebuild and explore, what they didn't know is that after encountering an odd construct in the middle of space they would be presented to a bigger galaxy than they thought. And faced against an enemy that threatens to destroy galactic civilization. How will humanity deal with the hardships it is faced with?
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 2 - Words: 10,625 - Reviews: 20 - Favs: 85 - Follows: 127 - Published: 4/24 - Master Chief/John-117, T. Lasky, Admiral Hackett, Shepard
Eddie Among the Stars by Primordial-wielder reviews
(AU) Being the only adolescence human on a isolated backwater space station while having secret modifications within him due to illegal experimentation is something Eddie has grown to accustom to. But having the only adolescence Tsktskian around falling for him after accidentally saving her life though is something that almost makes him wish that he had died in that laboratory.
Crossover - Mass Effect & Lloyd in Space - Rated: T - English - Sci-Fi/Romance - Chapters: 3 - Words: 16,409 - Reviews: 2 - Favs: 5 - Follows: 9 - Updated: 4/24 - Published: 7/17/2023 - [Eddie H., Brittany B.] SAM, Lloyd N.
Sins Effect: Solar Empire by Xehanot reviews
Humanity fought for 30 years against the aliens, and the corrupted. Now they managed to create peace between them, only for them to get in contact with the Citadel races. Will there be another war, will there be peace, and how will the Citadel Races react to an Alliance that is actively preparing for the Reapers.
Crossover - Mass Effect & Sins of a Solar Empire - Rated: M - English - Sci-Fi - Chapters: 1 - Words: 929 - Reviews: 3 - Favs: 24 - Follows: 41 - Published: 4/24 - Aria T'Loak, Councilor Valern, Councilor Tevos, Councilor Sparatus
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: 331 - 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: 1966 - Favs: 5,213 - Follows: 6,025 - 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: 658 - Follows: 967 - Updated: 4/22 - Published: 2/6 - Harry P., J. Garson, Shepard
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: 387 - Follows: 545 - 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: 318 - Favs: 924 - Follows: 1,361 - 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: 122 - Favs: 349 - Follows: 452 - 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: 285,569 - Reviews: 123 - Favs: 326 - Follows: 400 - 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: 66 - 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: 148 - Favs: 384 - Follows: 475 - 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: 70 - Follows: 88 - Updated: 4/12 - Published: 1/3/2023 - Liara T'Soni, Miranda L., Shepard
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: 59 - Follows: 101 - 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: 50 - Follows: 79 - 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: 600 - Follows: 846 - 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: 71 - Follows: 98 - 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
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