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The Prelude to War by Indigard reviews
A very different Mass Effect galaxy encounters a strange and relentless invader that is in constant hunger for Biomass but they never know it's just a glimpse of what is coming for them. Featuring: an alternative history for every species, a bigger and more populated galaxy, cunning Asari, and a militarized and Germanized human empire.
Crossover - Warhammer & Mass Effect - Rated: T - English - Chapters: 12 - Words: 203,313 - Reviews: 55 - Favs: 111 - Follows: 123 - Updated: 8h - Published: 11/6/2021 - Imperial Guard, Tyranids, OC, Shepard
Sith Effect Episode II: The Skyllian Blitz by Metagray reviews
Having a seat on the council for almost two decades, the influence of the Sith has seeped into almost all aspects of Citadel space and has made them enemies within The Terminus Systems and Batarian Hegemony. John Shepard, Sith Apprentice, finds himself in this conflict with his loved ones at risk and only The Force to turn to in his darkest hour. Through Passion we gain Strength.
Crossover - Star Wars & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 1 - Words: 4,121 - Reviews: 10 - Favs: 42 - Follows: 58 - Published: 12h - D. Anderson, Admiral Hackett, Shepard, Hannah S.
Quintessence Effect by EvaShinobiKaiserKnight reviews
From Cycles of long ago from uncharted regions of the universe comes a legend, the legend of Voltron the Legendary Defender of the Universe. A mighty robot loved by good feared by evil. As the cycles repeat the return of a great threat awoken a slumbering princess of a lost people would gather five new Paladins so they may bring back Voltron the Legendary Defender of the Universe.
Crossover - Mass Effect & Voltron: Legendary Defender - Rated: T - English - Sci-Fi/Fantasy - Chapters: 5 - Words: 56,719 - Reviews: 10 - Favs: 29 - Follows: 26 - Updated: 16h - Published: 7/14 - [Princess Allura, OC] [Shepard, Ashley W.]
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: 26 - Words: 94,441 - Reviews: 173 - Favs: 584 - Follows: 864 - Updated: 7/18 - Published: 7/8/2022 - Rookie, Shepard
One Small Step by Bardothren reviews
Izuku opens a door inside a Turian ship and it all goes downhill from there.
Crossover - Mass Effect & My Hero Academia/僕のヒーローアカデミア - Rated: K - English - Sci-Fi/Drama - Chapters: 2 - Words: 5,273 - Reviews: 13 - Favs: 34 - Follows: 49 - Updated: 7/17 - Published: 6/11 - Izuku M., Nezu/The Principal
Outlaws of the Verse (REVISED: July 17th, 20204) by Coltkit Prods. Omniva Verse reviews
In the World of "The Last Spartan" by "DinoJake" (Sequel/Spinoff/AU/Multi-Xover). 1000 years since the Reapers' defeat. People stopped aging (Supposedly caused by the wave that reprogrammed the Reapers). Kept sustainable by Replicators, Dyson Spheres, & Magic. Meanwhile: 3 Powers battle for the soul of the Galaxies: The Space Forces, Pirates, & The Outlaws. My OCs must choose sides
Crossover - Mass Effect & Halo - Rated: T - English - Sci-Fi/Family - Chapters: 11 - Words: 83,801 - Reviews: 2 - Favs: 16 - Follows: 12 - Updated: 7/17 - Published: 10/21/2023 - OC, OC
An intriguing result by ReligiousZealot reviews
The Turians, the military arm of the Council and the galaxy's peacekeepers, initially stood alone during their encounter with the Council. However, what if they hadn't been alone? What if their first contact wasn't solely with the Council? Imagine if they had an unexpected ally—a species unlike any other: the Zerg collective
Crossover - StarCraft & Mass Effect - Rated: T - English - Mystery/Suspense - Chapters: 7 - Words: 13,149 - Reviews: 22 - Favs: 63 - Follows: 93 - Updated: 7/17 - Published: 5/14
The long way home by DeltaSev reviews
Auraxis year 2945. The TR, NC and VS signs an uneasy peace with each other. They expand across the Luminair system, and start to explore outwards with the new FTL and Wormhole Teleportation. The wormhole from years ago has sent them even further away from the Earth they know and the Galaxy they lived in. Happening during the events of Mass Effect 2.
Crossover - PlanetSide & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 3 - Words: 17,079 - Reviews: 5 - Favs: 22 - Follows: 28 - Updated: 7/16 - Published: 9/12/2023 - Miranda L., Jacob T., Shepard
Mario Effect by OroDeus reviews
Haunted by visions of impending doom, Mario summons his ragtag team of explorers to adventure. Their journey across the stars will uncover the koopa king's horrible plot to take over the galaxy.
Crossover - Mario & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 7 - Words: 8,563 - Reviews: 3 - Favs: 3 - Follows: 6 - Updated: 7/15 - Published: 12/27/2023 - Mario, Luigi, Daisy, Toad
Mass Effect: Become Legend by Redgrave21 reviews
More than five years after the Reaper and Red Wars, Jane Shepard had lost her life for her galaxy, while Garrus Vakarian struggles to move on from the loss of the love of his life. But when Garrus begins to suffer strange dreams, the Normandy crew are thrust into a conflict that has lasted since the beginning of time. All while a strange voice tempts Garrus with… Salvation.
Crossover - Destiny & Mass Effect - Rated: M - English - Adventure/Romance - Chapters: 6 - Words: 30,100 - Reviews: 15 - Favs: 10 - Follows: 22 - Updated: 7/15 - Published: 7/7 - Garrus V., Shepard, Ghost, Osiris
United Under Two Skies by Gearman reviews
The story of Rex Craster, Courier Six, and commander Jane Shepard as their worlds collide and both of their realities are forever altered. This Fan fic has been running for several years now, and as such starts out rough and (hopefully) gradually getting better. Please enjoy this labor of love, exploration, and experimentation on my part. I hope you come to love Rex and Jane too.
Crossover - Fallout & Mass Effect - Rated: M - English - Chapters: 41 - Words: 269,708 - Reviews: 93 - Favs: 312 - Follows: 382 - Updated: 7/15 - Published: 7/19/2014 - Courier, Veronica S., Jack, Shepard
The Reclaimer Wars:The Reaper Crisis by Johnnieboy11 reviews
Six months prior to the worst crisis the normal Milky Way would face, Commander Shepard hunts the Collectors abducting human colonists in the Terminus Systems when she comes upon a terrifying new sight:Three Intergalactic fleets arrayed against each-other and her sole Frigate. Three new factions, one seeking a home and two seeking answers, all linked by the Star Roads.
Crossover - Game X-overs & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 13 - Words: 65,407 - Reviews: 73 - Favs: 158 - Follows: 199 - Updated: 7/15 - Published: 4/26 - Liara T'Soni, Tali'Zorah, Miranda L., Shepard
Stellar Effect by Brandon Storm reviews
The Reapers trap was perfect in its design. Their execution refined over billions of years, their technology refined since the dawn of time itself. Right up until Someone Broke the Trap!
Crossover - Mass Effect & Stellaris - Rated: T - English - Adventure/Sci-Fi - Chapters: 94 - Words: 410,544 - Reviews: 394 - Favs: 463 - Follows: 578 - Updated: 7/14 - Published: 8/7/2022
Deathwatch: Embers (the Citadel incident) by Imperiumpilled30k reviews
999.m41 the brothers of Kill-Team Embers have been sent on what should have been a routine purging of Orkz in the Octurus sector, however something is a foot, a missing inquisitor and strange device make for a deadly pairing...with this encounter setting forth a much more dangerous chain of events... (lost the last chapter i wrote stoned as shit and none of it saved fml)
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Fantasy - Chapters: 4 - Words: 21,168 - Reviews: 6 - Favs: 21 - Follows: 23 - Published: 7/14 - Space Marines, Deathwatch, U. Wrex, Shepard
The Bureau of Multiverse Affairs by RedFrontWriter
Recruited by the mysterious Lutece twins, a band of heroes are sent on a mission to hunt down the sinister Professor Moriarty as he attempts to become the greatest criminal in the multiverse.
Crossover - Doctor Who & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 21 - Words: 94,168 - Favs: 7 - Follows: 11 - Updated: 7/14 - Published: 3/3 - 4th Doctor, Sarah Jane S., Garrus V., Tali'Zorah
Mass Effect 10 Ben Second Chance by benguin reviews
Here is a world for both Ben 10 and mass effects Fans, but basically it like any story where ben world is gone and lives in another universe to move on from the pain. I do not Own Ben 10 and Mass effect. They are owned by they respected properties of Man of Action and Bioware. Please support the official release.
Crossover - Ben 10 & Mass Effect - Rated: T - English - Sci-Fi/Romance - Chapters: 20 - Words: 60,388 - Reviews: 29 - Favs: 62 - Follows: 65 - Updated: 7/13 - Published: 2/15 - [Ben T., Miranda L.] Ship, Shepard
Pandora Effect by Depressing Rat reviews
In wake of the RDA'S defeat at the hands of the Resistance, Pandora has soon entered a state of unity with the aid of Human Resistance and Avatars by introducing Sky people technology to the Na'vi tribes, this alliance soon forming the Pandoran Alliance.
Crossover - Mass Effect & Avatar - Rated: T - English - Sci-Fi/Fantasy - Chapters: 1 - Words: 495 - Reviews: 3 - Favs: 7 - Follows: 11 - Published: 7/11
Mass Effect Crossover Ideas by Fire Wolf 2132 reviews
I don't have time to write like I used to, so I'll leave these here for anyone interested in the ideas.
Crossover - X-overs & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 1 - Words: 1,063 - Reviews: 2 - Favs: 3 - Follows: 4 - Published: 7/11 - Complete
Spectre Prime by Leopardman reviews
Commander John Shepard sacrificed himself to stop the Reaper War. He later wakes up in a universe completely different from his own. But he will soon show there’s more to him than meets the eye. (Warning: Rated T with minor cursing from Shepard.)
Crossover - Transformers/Beast Wars & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 8,773 - Reviews: 10 - Favs: 19 - Follows: 22 - Updated: 7/10 - Published: 6/24 - Shepard, Optimus Prime, Ironhide
Kerberos by timedraven117 reviews
Commissioned: The Green Flu struck earth like a meteor, in its clutches billions died, and a new world emerged. Now it is the year 2156 and that which has been dreaded by humanity ever since the truth of the Green Flu has come to pass. First Contact.
Crossover - Mass Effect & Left 4 Dead - Rated: M - English - Sci-Fi - Chapters: 13 - Words: 69,021 - Reviews: 23 - Favs: 157 - Follows: 221 - Updated: 7/9 - Published: 4/23/2021 - Illusive Man, Shepard
Mass Effect-Batman: Crisis On The Citadel by James Keller reviews
After 2 years of operating on Omega, The Dark Knight comes to the Citadel in pursuit of a dangerous new drug that is about to be unleashed upon the very heart of Council Space. This will put him into an alliance with Lt. Garrus Vakarian of C-Sec's Major Crimes Unit as they uncover a massive Conspiracy.
Crossover - Mass Effect & Batman - Rated: M - English - Crime/Mystery - Chapters: 8 - Words: 54,833 - Reviews: 19 - Favs: 46 - Follows: 56 - Updated: 7/9 - Published: 10/29/2021 - Bruce W./Batman, Garrus V., Liara T'Soni, Tali'Zorah
Amongst These Stars by Warlock99 reviews
To bring a revolution that spans the galaxy is a feat very few can accomplish. To create an Empire that covers an entire galaxy is something only Naruto's people can accomplish. Amongst these stars they would rule and the reapers would feel their wrath.
Crossover - Naruto & Mass Effect - Rated: M - English - Adventure - Chapters: 5 - Words: 14,121 - Reviews: 33 - Favs: 184 - Follows: 242 - Updated: 7/9 - Published: 2/22 - Naruto U., Shepard
Mass Effect: Spider and Wolf by Night Shadow76 reviews
The Spider-verse has been saved, the Inheritors had been defeated, and all is well. Well, except for one Spider. With his home gone and destroyed, he has no where to go, but with aid from Madam Web and The Other, he will have a new home, once that's on the edge of destruction. Now if only he could make sense of how Asari breeding works. Based loosely on the Inheritors storyline.
Crossover - Spider-Man & Mass Effect - Rated: M - English - Adventure - Chapters: 2 - Words: 8,444 - Reviews: 4 - Favs: 15 - Follows: 19 - Updated: 7/8 - Published: 6/12 - OC
Feared Reverence by ayab reviews
376 years after the battle between heaven and earth. Two humans have achieved godhood. Using their power to guide humanity to the stars. How will the galaxy react to see a species so advanced yet so primitive? So powerful yet not wanting to use their power. They are what the citadel race aspires to be and hates because of their jealousy.
Crossover - Naruto & Mass Effect - Rated: T - English - Fantasy/Sci-Fi - Chapters: 29 - Words: 114,630 - Reviews: 204 - Favs: 370 - Follows: 471 - Updated: 7/8 - Published: 1/14/2023
Timeline(Spoilers for call of new vegas rework) by Darell441
A timeline for my fallout fanfic and upcoming mass effect fanfic warning it may contain spoilers
Crossover - Fallout & Mass Effect - Rated: T - English - Chapters: 1 - Words: 2,317 - Favs: 1 - Follows: 1 - Published: 7/6 - Complete
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