Mass Effect Crossovers
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The voyage of Valiant by Lighting wolf knight reviews
There was more on the line... Yet plans and webs were made. Rated T for violence, death, and profanity.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 811 - Reviews: 1 - Favs: 5 - Follows: 6 - Published: 4/20 - Miranda K., D. Whitcomb, OC, Shepard
The Good Shepard by Geishadoll reviews
Jesse Shepard was a lot of things: A solider with a shady past, a son, and a brother With the threat of the Saren and the Reapers hanging over his head, he discovers a secret that will shake not only the foundations of the Alliance but the galactic community as a whole. Meanwhile on the Citadel, stalks the lower wards leaving Caroline Shepard and her new very strange partner to fi
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Family - Chapters: 7 - Words: 12,858 - Reviews: 33 - Favs: 57 - Follows: 103 - Updated: 4/20 - Published: 8/5/2021 - The Emperor, Primarch/s, Shepard, OC
Remnite Adrift by MarredTales reviews
Falling prey to a surprise attack by Cinder and her cronies, Yang did the one thing Ambrosius said not to, she fell. There was a fairytale about a girl who fell through the world, but she returned to her own world whereas Yang found herself somewhere unknown. The colony of Feros welcomed her to the Milkyway Galaxy where she inevitably has her life tangled with the first human Spect
Crossover - Mass Effect & RWBY - Rated: M - English - Adventure/Friendship - Chapters: 18 - Words: 74,503 - Reviews: 53 - Favs: 109 - Follows: 164 - Updated: 4/19 - Published: 7/28/2021 - Liara T'Soni, Tali'Zorah, Shepard, Yang X.L.
Noble Effect by LoneSpartan52 reviews
Noble Six was alone after the death of Emile. The Pillar of Autumn had left Reach, leaving the lone Spartan behind. But what if instead of dying on Reach, fighting to his last breath, Six survived? What if he escaped Reach and headed for Earth, only to end up in another galaxy, in another war? Will he agree to fight the reapers alongside aliens? Find out in Noble Effect
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 16 - Words: 62,375 - Reviews: 124 - Favs: 315 - Follows: 444 - Updated: 4/19 - Published: 7/3/2020 - SPARTAN-B312/Noble Six, Garrus V., Shepard, Javik
A War of Two Galaxies by JPfan0922 reviews
See what happens when the reapers invade the Star Wars Galaxy! Can Commander Shepard, the Normandy Crew, and the Systems Alliance help rid this new galaxy of the reapers? Can the Republic and Separatist Alliance put aside their many differences for the good of the galaxy? Find out in: A War of Two Galaxies! (Takes place right before Revenge of the Sith. Slightly altered time line)
Crossover - Star Wars & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 5 - Words: 9,816 - Reviews: 15 - Favs: 19 - Follows: 21 - Updated: 4/19 - Published: 4/4 - Anakin Skywalker, Obi-Wan K., Liara T'Soni, Shepard
Technophiles by thelordofdarkreunion reviews
Everyone's favorite technophilic groups meet: the Adeptus Mechanicus from Warhammer 40k and the Quarians from Mass Effect. When the Cult Mechanicus learns of the existence of the A.I.'s known as the Geth and Reapers, they decide only one thing can be done, and enlist the help of Quarians to fight once more for their ancestral home. Keelah se'lai and Glory to the Machine God!
Crossover - Warhammer & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 18 - Words: 202,172 - Reviews: 371 - Favs: 550 - Follows: 719 - Updated: 4/18 - Published: 9/24/2021 - Adeptus Mechanicus, Tali'Zorah, Kal'Reegar, Rael'Zorah - Complete
Soul Effect by Story-lover1414 reviews
The Chosen undead didn't confront Gwyn, didn't link the first flame and as the world around him starts to to break, he created a way to escape. In a new world the chosen undead made himself king and brought the world under his command, with the whole world the only thing left were the stars beyond but space itself brings forth entirely new challenges and trials
Crossover - Mass Effect & Dark Souls - Rated: M - English - Chapters: 2 - Words: 6,713 - Reviews: 9 - Favs: 53 - Follows: 84 - Updated: 4/18 - Published: 6/7/2021
Mass Effect demi humans by EclipsePheniox reviews
Long ago on earth demi-humans appeared on earth. Now expanding into the galaxy the other races have to deal with both humans and demi-humans. Mass effect story from beginning to end but with monster people to make it more interesting. Experimental, possible harem
Crossover - Mass Effect & Monster Girl Encyclopedia - Rated: M - English - Adventure/Sci-Fi - Chapters: 31 - Words: 103,233 - Reviews: 40 - Favs: 209 - Follows: 208 - Updated: 4/17 - Published: 8/2/2019
A few Titans Solves Many Issues, Including the Reapers by vmoneywashere reviews
In a distant yet expansive corner of the galaxy, many races rose and fell without anyone noticing. Yet a collection survived their ordeals and now look outwards. They bring Ideals, Peace, Prosperity, all under the UNSA and its Custodianship. When the Quarian Migrant fleet encounters an Expedition fleet, the nomads find a new home and a new family. (more updates in the winters) HFY
Crossover - Mass Effect & Stellaris - Rated: T - English - Sci-Fi/Family - Chapters: 10 - Words: 44,718 - Reviews: 89 - Favs: 326 - Follows: 482 - Updated: 4/16 - Published: 11/16/2021 - [Tali'Zorah, Shepard] Rael'Zorah, OC
Rising from the Embers of Sera by thehappy reviews
The people of Sera rebuild, spreading to the stars. Wars will be waged. Peace will be sought. The Coalition has risen from the ashes to take their right to exist in the galaxy. They will survive...no matter the cost.
Crossover - Gears of War & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 10 - Words: 161,421 - Reviews: 156 - Favs: 382 - Follows: 474 - Updated: 4/16 - Published: 12/28/2020 - OC, U. Wrex, Shepard, Councilor Tevos
Mass Effect: inFAMOUS (Alternate Timeline) by illFatedSuccess reviews
Humans and Conduits have finally settled their differences and have begun their trek into the stars after decades of technological innovation. When First Contact is made and the galaxy witnesses the power of the Alliance, how will the Council react to this threat to their reign?
Crossover - Mass Effect & inFAMOUS - Rated: M - English - Sci-Fi/Adventure - Chapters: 1 - Words: 2,741 - Reviews: 2 - Favs: 14 - Follows: 27 - Published: 4/15 - Shepard, OC, Cole MacGrath, Delsin R.
Collision by Viking Alaska reviews
Dying was the easy part. Moving on was a lot more difficult...
Crossover - Mass Effect & Avengers - Rated: M - English - Romance/Angst - Chapters: 1 - Words: 628 - Reviews: 2 - Favs: 1 - Follows: 1 - Published: 4/15 - [Shepard, Garrus V.]
System Alliance: Unknown Regions by Konradoziom reviews
After the end of War for Milda, System Alliance spent the next few years rebuilding the fleet. New classes of ships that fully hybridized the acquired technologies began to be produced at a tremendous pace, and System Alliance decided to resume expansion, but towards Unknown Regions, and not to known parts of the galaxy.(Sequel to - System Alliance: War for Milda)
Crossover - Star Wars & Mass Effect - Rated: K+ - English - Adventure/Sci-Fi - Chapters: 2 - Words: 4,869 - Reviews: 3 - Favs: 24 - Follows: 28 - Updated: 4/15 - Published: 4/4
Mass Effect: Resurrection by RabidRabbids reviews
Shepard's life hadn't gotten any easier. Entire colonies were disappearing, millions of people gone. And that's not even mentioning she'd been dead for two years, but desperate times call for desperate measures, and Shepard is forced to work with Cerberus to find out what's behind the disappearances. Thankfully, she's got monsters backing her up. (Sequel to Monstrum Immortalem)
Crossover - Mass Effect & Guardians of the Galaxy - Rated: M - English - Sci-Fi/Adventure - Chapters: 15 - Words: 65,834 - Reviews: 4 - Favs: 13 - Follows: 16 - Updated: 4/14 - Published: 6/15/2021
A Change in the Game by ShadowofHawk55 reviews
John Shepard has saved the galaxy on three occasions and finally reached a stable point in his life. Now he and his crew are stranded in a strange, and very dangerous, world. How will this change the Song of Ice and Fire?
Crossover - Mass Effect & Game of Thrones - Rated: M - English - Sci-Fi/Adventure - Chapters: 19 - Words: 42,375 - Reviews: 81 - Favs: 112 - Follows: 168 - Updated: 4/14 - Published: 1/28/2021
Mass Effect: Rise of Nations of Old by bladebrony reviews
The System Alliance had kept the United States, European Federation, and Russian Federation in the dark about the Galactic Community through manipulation and lies, just to hold the illusion of the sole leader of mankind to the Citadel Council and reap the luxury for themselves. when a colonization fleet arrives in Trinitar System the galaxy shall see the Rise of Giants
Crossover - Mass Effect & EndWar - Rated: M - English - Sci-Fi/Adventure - Chapters: 1 - Words: 3,763 - Reviews: 7 - Favs: 46 - Follows: 56 - Published: 4/14 - Tali'Zorah, Shepard, OC
Heroes UNITE! by So-Pro Warrior reviews
Commander Shepard and his team have gathered together the races of their Galaxy in an effort to defeat the Reapers. But is it enough? When the team comes across a strange woman they find out that if they are to truly defeat the Reapers once and for all. They will need all the help they can get. But not from their Universe. Multiverse Crossover! Chapters 6-22 Being Rewritten!
Crossover - Mass Effect & Halo - Rated: T - English - Adventure/Sci-Fi - Chapters: 50 - Words: 1,515,148 - Reviews: 892 - Favs: 384 - Follows: 374 - Updated: 4/13 - Published: 6/21/2013 - Master Chief/John-117, Shepard - Complete
The Final Olympian by TheSilverboar reviews
Percy Jackson. Alive since before humanity even reached Mars, wandering in solitude. But as Saren tries to destroy the galaxy he can't stand Idly by and returns to Alliance Space to help stop this new threat to his species. (Male Sheppard)
Crossover - Percy Jackson and the Olympians & Mass Effect - Rated: M - English - Sci-Fi/Friendship - Chapters: 4 - Words: 6,520 - Reviews: 37 - Favs: 405 - Follows: 509 - Updated: 4/12 - Published: 11/6/2021 - Percy J., Ashley W., Tali'Zorah, Shepard
Fallout: New Galaxy by OneUpForExcelsior reviews
Courier Six after a bloody battle in Big mountain is thrown into the mass effect universe nearly a thousand years before the events of the trilogy. How will the galaxy react to the Legend of the Mojave desert and its magnet of trouble? Rated M just to be sure.
Crossover - Fallout & Mass Effect - Rated: M - English - Humor/Adventure - Chapters: 8 - Words: 32,287 - Reviews: 24 - Favs: 95 - Follows: 144 - Updated: 4/12 - Published: 3/24 - Courier, Tali'Zorah, Aria T'Loak, OC
Spectre by blackshamrock333 reviews
Ce qui ne devait être qu'une simple mission de récupération, pour la commandante Shepard de l'UNSC, a rapidement tourné au cauchemar. Désormais, l'humanité et la citadelle sont au bord de la guerre, inconscient qu'un danger bien plus grand les guette. Deux Shepard ne seront pas de trop pour cette mission.
Crossover - Halo & Mass Effect - Rated: T - French - Adventure - Chapters: 11 - Words: 31,569 - Reviews: 7 - Favs: 11 - Follows: 16 - Updated: 4/11 - Published: 9/12/2021
Shield of the Systems Alliance by J26596 reviews
World war encroaches 21st century Earth and in a bid to save it the SGC removes all alien technology while sealing the Earth gate and moves operations off-world where that develops into a colony and SHIELD was born. When Shepard finds the beacon SHIELD must step in to help prevent a galactic genocide. Stargate and ME crossover
Crossover - Stargate: SG-1 & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 12 - Words: 43,239 - Reviews: 108 - Favs: 334 - Follows: 452 - Updated: 4/7 - Published: 11/14/2019
Starwatch by CruxMDQ reviews
A youthful lieutenant Shepard unknowingly facilitates the release of an ancient evil and sets in motion a chain of events that will greatly influence the outcome of the first contact with Citadel species - and potentially threaten the standing of humanity among them. (Contributions: BrokenLifeCycle, kishinokurobi, kyro2009)
Crossover - Mass Effect & Overwatch - Rated: T - English - Adventure/Sci-Fi - Chapters: 64 - Words: 356,429 - Reviews: 167 - Favs: 296 - Follows: 357 - Updated: 4/7 - Published: 6/29/2016 - Shepard, Amélie L./Widowmaker, Lena O./Tracer, G. Reyes/Reaper
Assassin's Creed: The Mass Effect by TomTheCat1 reviews
The Reaper War, 2186. Even in the face of complete annihilation, The Milky Way still suffers from infighting, some of which has been raging for thousands of years. As the last surviving member of the Assassin Brotherhood, Abigail has one chance to bring an end to the Templars, and to Cerberus.
Crossover - Mass Effect & Assassin's Creed - Rated: T - English - Romance/Adventure - Chapters: 25 - Words: 44,030 - Reviews: 8 - Favs: 48 - Follows: 62 - Updated: 4/6 - Published: 6/23/2019 - Shepard, Samantha T., Kai Leng, OC
The Mission Stays the Same by Broken Trident reviews
A joke of Chaos daemon sent two unlikely allies - an Eldar Farseer and an Imperial Storm trooper, through the Warp and into another Universe. In this place, everything is alien to them. Except for one thing - war. War is something they know very well. (Story adopted by Regina Dea. New author starts from Chapter 21)
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 33 - Words: 367,965 - Reviews: 2649 - Favs: 4,755 - Follows: 5,215 - Updated: 4/6 - Published: 10/4/2011 - Eldar, Imperial Guard, Shepard
Clone Effect by Twistedstitcher27 reviews
Captain Rex is sent on shore leave after Umbara. While at 79's, he meets a woman from a planet he's never heard of, who is facing ghosts of her own while trying to find her place in a Republic at war. Rated M for language and future chapters.
Crossover - Star Wars: The Clone Wars & Mass Effect - Rated: M - English - Romance/Hurt/Comfort - Chapters: 30 - Words: 136,247 - Reviews: 67 - Favs: 196 - Follows: 270 - Updated: 4/5 - Published: 1/27/2021 - [Captain Rex, Shepard] Fives, Anakin S. - Complete
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