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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: 26 - Words: 207,839 - Reviews: 1704 - Favs: 4,718 - Follows: 5,455 - Updated: 6h - Published: 6/5/2013 - Saren A., Shepard, OC
Mass Effect: A Guardsman's Tale by IX404 reviews
There are many tales of extraordinary heroes within the Imperium of Man, but every once in a while, one finds one that is unique among them all. This is the tale of a Guardsman that not only upheld his duty to the Emperor of Mankind, but also enabled the survival of a distant, and alien, galaxy.
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Drama - Chapters: 5 - Words: 29,165 - Reviews: 34 - Favs: 147 - Follows: 220 - Updated: 5/1 - Published: 3/18 - Imperial Guard, OC, Shepard
Never Fade Away by Ideas-Guy reviews
Lives are cheap and money is everything. That's how the orphanage made its money - lending out children for human expirementation. L is an old man at the age of fifteen and he knows he doesn't have much time left. All that mattered was getting out, but he soon learns that the world is a lot bigger than Night City. And that the galaxy is a lot bigger than Earth.
Crossover - Mass Effect & Cyberpunk 2077 - Rated: M - English - Adventure/Drama - Chapters: 21 - Words: 109,866 - Reviews: 148 - Favs: 619 - Follows: 714 - Updated: 5/1 - Published: 10/31/2022 - Shepard, V
War of the Old Ones by Ian the Mechanic reviews
In forgotten ages past, two near eldritch forces vied for the very life essence of the Galaxy. Unknown to the young races, that war is still ongoing. how can the UNSC, the Citadel Council or the Covenant hope to stand against such forces, when they are still embroiled in their own petty squabbling? How could they hope to survive the War of the Old Ones?
Crossover - Mass Effect & Halo - Rated: M - English - Sci-Fi/Horror - Chapters: 19 - Words: 99,906 - Reviews: 107 - Favs: 240 - Follows: 353 - Updated: 5/1 - Published: 2/21/2022
Saga of the Bridgers-Year 6 by Ganel750 reviews
A new Menace. As the war between the Coalition and the Empire enters a standstill, entire colonies at the edge of Wild Space start disappearing. When a new enemy will prove to be a threat to both sides in the conflict, enemies will have to join forces to prevent this new menace from conquering the galaxy.
Crossover - Star Wars & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 24 - Words: 134,001 - Reviews: 4 - Favs: 20 - Follows: 16 - Updated: 5/1 - Published: 8/17/2022 - Thrawn, OC, Ezra B., Shepard
The Wayfarer by Umbral Choir reviews
In the twilight of the universe, the Ihan-rii, a forgotten sect of Protoss travel to another reality to escape the hounds of the void. Xiltar, the last member of the umbral choir will guide his people into this world, only to find that he traded one war of annihilation for another. (Under maintenance).
Crossover - StarCraft & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 37 - Words: 126,474 - Reviews: 35 - Favs: 77 - Follows: 102 - Updated: 4/30 - Published: 2/5
Remnants by General Rage reviews
From Halo's ashes, a mismatched Alliance is born. UNSC soldiers now serve alongside both Batarian deserters and shifty Jackal Space Pirates. Now Shepard and Master Chief have to keep these strange bedfellows from killing one another before they can stop an emergent new threat to the galaxy. The Next Swashbuckling Chapter of the Wormhole Chronicles.
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 36 - Words: 778,761 - Reviews: 766 - Favs: 448 - Follows: 511 - Updated: 4/30 - Published: 4/22/2016 - Master Chief/John-117, Cortana, Tali'Zorah, 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: 39 - Words: 173,678 - Reviews: 183 - Favs: 283 - Follows: 398 - Updated: 4/30 - Published: 8/7/2022
The Mass of an Aura's Effect by vmoneywashere reviews
Team CFVY, one of the best second-year teams in Beacon, is fleeing from the Grimm when they unexpectedly find an alien artifact that transports them off Remnant. Meanwhile, Warlock Team, led by the son of John and Tali Shepard, is stuck guarding a dig site when 4 teens are dropped in their lap. One thing is for sure, all of them are in for a ride. (Rewrite of Aura Effect)
Crossover - Mass Effect & RWBY - Rated: T - English - Adventure/Sci-Fi - Chapters: 5 - Words: 17,425 - Reviews: 23 - Favs: 33 - Follows: 49 - Updated: 4/30 - Published: 11/11/2022 - [Tali'Zorah, Shepard] OC, Team CFVY
I'm Nobody by free man writer reviews
He didn't have anything when he was born. Just a name and number. But over time, what he had grew. He, with his friends began to understand that there was more to their existence then just their name and number. They will prove that they were meant to be real. To exist. To become something more than just a Nobody. Co-written and created with Jebest4781. Fem Shepard. Now on Ao3.
Crossover - Kingdom Hearts & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 44 - Words: 771,042 - Reviews: 640 - Favs: 571 - Follows: 603 - Updated: 4/29 - Published: 9/13/2020 - Axel, Roxas, Xion, Shepard
A Galaxy of Inheritors and Usurpers by HaloZealotDemon reviews
The Separatists destroy the Covenant in a brutal war, yet in the 2570s they still persist in their efforts, but in two years they will be snuffed out. However The Gods have other plans. The Migrant fleet decides to escape through Relay 314 into unknown space, but instead 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: 2 - Words: 17,488 - Reviews: 53 - Favs: 255 - Follows: 350 - Updated: 4/29 - Published: 12/25/2022 - Arbiter, T. Hood, Tali'Zorah, Councilor Sparatus
The Diocese by pythoner101 reviews
Commander Chloe Sheperd learns of a new group vying for power in the depths of Omega. But this is no ordinary gang, but far more powerful and horrific, brought forth from a place where there is only war. As she learns of its deeds and ambitions Shepherd must make a momentous descision, and hope she does not come to regret it.
Crossover - Warhammer & Mass Effect - Rated: M - English - Chapters: 4 - Words: 8,964 - Reviews: 24 - Favs: 53 - Follows: 91 - Updated: 4/29 - Published: 5/10/2020
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: 20 - Words: 302,362 - Reviews: 306 - Favs: 577 - Follows: 710 - Updated: 4/29 - Published: 12/28/2020 - OC, U. Wrex, Shepard, Councilor Tevos
A Warden Amongst Starry Skies by SophimusPrime reviews
What if, by chance, our esteemed Commander and her crew just so happened to unearth a strange, seemingly mundane mirror upon one of their many expeditions throughout the systems one day? Sure, at first it would have seemed like nothing. Just sat in the Shuttle Deck gathering dust for a while.. until a certain Hero just so happened to come tumbling out of it.
Crossover - Mass Effect & Dragon Age - Rated: M - English - Romance/Humor - Chapters: 4 - Words: 25,471 - Reviews: 1 - Favs: 7 - Follows: 8 - Updated: 4/29 - Published: 4/22 - Garrus V., The Warden
Game Of The Demon by Ultimatedaywriter reviews
What happens when you hand a feverous 11 year old bastard a sapient magic sword and tell him he's the rightful king? Silas hopes its a lot of blood shed and civil wars. Can Westeros hold itself back from eating itself or will a demon feed like a bloated tick. Smut Violence and Later Asari Also minor Hentai Gotcha System
Crossover - Mass Effect & Game of Thrones - Rated: M - English - Humor/Parody - Chapters: 4 - Words: 8,252 - Reviews: 2 - Favs: 25 - Follows: 34 - Updated: 4/27 - Published: 4/21
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: T - English - Chapters: 40 - Words: 257,140 - Reviews: 88 - Favs: 287 - Follows: 355 - Updated: 4/27 - Published: 7/19/2014 - Courier, Veronica S., Jack, Shepard
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: 40 - Words: 136,339 - Reviews: 51 - Favs: 256 - Follows: 265 - Updated: 4/27 - Published: 8/2/2019
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: 5 - Words: 19,391 - Reviews: 6 - Favs: 49 - Follows: 61 - Updated: 4/27 - Published: 1/3 - Liara T'Soni, Miranda L., Shepard
The Diary of a Time Lady 6: For the Glory of Sontar! by TimeTraveller-1900
The Sontaran-Terran Empire war is one of the most brutal wars in the Milky Way. Or at least it would be.
Crossover - Doctor Who & Mass Effect - Rated: K - English - Sci-Fi - Chapters: 1 - Words: 1,651 - Favs: 8 - Follows: 4 - Published: 4/26 - 3rd Doctor, Shepard - Complete
la cruzada de los perdidos by eduardogiribalde
t
Crossover - Warhammer & Mass Effect - Rated: T - Spanish - Adventure - Chapters: 27 - Words: 200,434 - Favs: 1 - Follows: 2 - Updated: 4/25 - Published: 4/24
Bring on the Wrecking Machine by Anhilliator1 reviews
After the Reopening of the Eve Gate - this time to another universe entirely, it didn't take long before New Eden came into contact with the Citadel Races - or rather, when a group of pirates unwittingly stumble their way into Horde territory. Thus begins the tale of the Citadel's biggest thorn-in-the-side.
Crossover - Mass Effect & EVE Online - Rated: T - English - Humor/Adventure - Chapters: 2 - Words: 5,387 - Reviews: 14 - Favs: 58 - Follows: 86 - Updated: 4/24 - Published: 3/16
Mass effect: The Grand Admiral by MasterHunter123 reviews
A man present at the end of the Reaper war is reborn by a 'Diety', given a system, he is told to save the universe. (Anti-Hero Mc, Gamer)
Crossover - Anime X-overs & Mass Effect - Rated: M - English - Sci-Fi/Crime - Chapters: 4 - Words: 6,632 - Reviews: 7 - Favs: 37 - Follows: 51 - Updated: 4/24 - Published: 4/16
Garden of Conquest by SirBearington reviews
Being a planet can be quite challenging especially when they live in the most hostile environment known to man. Everything could technically end them. From other planets, wandering stars or even black holes. There's a never ending list of things that could ruin their day. At least they have tentacles to protect themselves. What do you mean planets aren't supposed to have tentacle?
Crossover - Cartoon X-overs & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 20 - Words: 52,818 - Reviews: 38 - Favs: 134 - Follows: 166 - Updated: 4/24 - Published: 3/1
I AM Shepard by oliverjack666 reviews
Mass effect is own by Bioware and EA. This was Inspired by ME SI: Ultimate Krogan. Though The Dimension hopping will have to wait. Freaking Squids.
Crossover - X-overs & Mass Effect - Rated: M - English - Chapters: 7 - Words: 18,794 - Reviews: 4 - Favs: 66 - Follows: 85 - Updated: 4/24 - Published: 9/19/2022
A fanfic idea of mine by ComplexProphet reviews
Posting in both fanfiction and crossover sections.
Crossover - Mass Effect & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 624 - Reviews: 4 - Favs: 2 - Follows: 3 - Published: 4/24
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