Mass Effect Crossovers
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Sparatus' Folly by Carthienes reviews
A series of snippets telling the story of the Human-Citadel war, fought between the Human X-Com and the Turian Hierarchy. Originally published on Reddit. Based on the original X-Com UFO Defence (1994), not the Reboot!
Crossover - X-Com & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 14 - Words: 21,693 - Reviews: 52 - Favs: 123 - Follows: 186 - Updated: 2/26 - Published: 2/14 - Complete
Mass effect: the Jaded ones by Ray SK reviews
A UNSC Human-covenant war-era battle group led by a Punic class supercarrier is introduced to a new galaxy. One where people are xenophilic, use to times of peace and harmony, and against disrupting the Status Quo. What will an extremely aggressive xenophobic and battle-hardened human faction add to the mix? and will their addition change the future of this galaxy. (No Spartans)
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Humor - Chapters: 2 - Words: 8,237 - Reviews: 23 - Favs: 62 - Follows: 98 - Updated: 2/25 - Published: 2/6 - E. Buck, 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: 9 - Words: 139,987 - Reviews: 142 - Favs: 347 - Follows: 424 - Updated: 2/25 - Published: 12/28/2020 - OC, U. Wrex, Shepard, Councilor Tevos
Immortal Galaxies by Lighting wolf knight reviews
An escape from an overrun galaxy lands them in another galaxy? What does being the biggest fish in the water gain you in a world without heavy hitters? Rated T for violence, death, and profanity.
Crossover - Halo & Mass Effect - Rated: T - English - Romance/Adventure - Chapters: 3 - Words: 4,777 - Reviews: 8 - Favs: 62 - Follows: 97 - Updated: 2/25 - Published: 11/11/2021 - [OC, Vetra N.] T. Hood
The Canadian Commonwealth by Vassago1991 reviews
In the vast multiverse event can happen that should never happen this is the story of one such universe with an event that should have never happened.
Crossover - Halo & Mass Effect - Rated: M - English - Chapters: 1 - Words: 3,336 - Reviews: 4 - Favs: 14 - Follows: 20 - Published: 2/24
Were it So Easy by Sigma0327 reviews
Six's life was a giant war. Every battle was a test of sheer tenacity and stubbornness against insurmountable odds. Every moment, every bullet fired, every Covenant, Insurrectionist, and Flood spore killed has led up to his last fight. Once again he was one of the few that stood between Earth and her enemies. This would be his final battle, and nothing could change that, right?
Crossover - Halo & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 5 - Words: 45,863 - Reviews: 73 - Favs: 439 - Follows: 652 - Updated: 2/23 - Published: 11/9/2020 - SPARTAN-B312/Noble Six, Tali'Zorah, Miranda L., Shepard
The Long, Long Walk by This Is Sarcasm reviews
Crow is stuck, but it's not all bad news; he's been offered shelter on the Normandy, and Spider can't hurt them here. Shepard now has an unkillable paracausal warrior, and his 'not-an-AI', Glint, is a complete cinnamon roll, but it's not all good news; he's half-starved, in culture shock, and has a bad case of trust issues. He might need work, sure, but who on this ship doesn't?
Crossover - Mass Effect & Destiny - Rated: T - English - Sci-Fi/Angst - Chapters: 11 - Words: 30,920 - Reviews: 57 - Favs: 163 - Follows: 237 - Updated: 2/23 - Published: 9/15/2021 - Joker, Shepard, Dr. Chakwas, Crow
Eat Me by Ultimatedaywriter reviews
Harry is transmigrated into by a cultivator with a simple mission. Get humanity up in the air before the galactic war of antihalation kicks off. Unfortunately, everything he tries goes horribly wrong. Brain eating phoenixes, timelord Tom Riddles, and indoctrinated vampires block him at every turn. He knows the only way to win is the get away and let the monsters eat each other.
Crossover - Harry Potter & Mass Effect - Rated: M - English - Parody/Horror - Chapters: 19 - Words: 22,561 - Reviews: 37 - Favs: 42 - Follows: 73 - Updated: 2/23 - Published: 2/5
The Claw of the Raven by Lighting wolf knight reviews
A plot to throw the galaxy into chaos and only those outside the rules were a match for it. Rated T for violence, death, and profanity.
Crossover - Warhammer & Mass Effect - Rated: T - English - Romance/Supernatural - Chapters: 1 - Words: 803 - Reviews: 2 - Favs: 2 - Follows: 4 - Published: 2/22 - [OC, Daro'Xen] Cyrus, Illusive Man
System Alliance: War for Milda by Konradoziom reviews
The remnants of Dark Empire began their siege on the planet Milda. The first real test for the navy and army of the System Alliance. Will they be up to the task or will they fail? And the most important. What will the price of this War be?(Sequel to - System Alliance Rise to Power)
Crossover - Star Wars & Mass Effect - Rated: T - English - Chapters: 6 - Words: 14,864 - Reviews: 10 - Favs: 53 - Follows: 52 - Updated: 2/22 - Published: 1/11 - Complete
Dead On Arrival: ML Short Story by TacoWrath
When the crew of the UCV Prosecutor, a Confederation destroyer, come across a floating alien derelict with a strange connection to humanity, they find something onboard that thrusts them into a fight for their lives. Based on Mass Effect: Murphy's Law, recommend you read it first for lore, technical details.
Crossover - Mass Effect & Dead Space - Rated: M - English - Sci-Fi/Horror - Chapters: 2 - Words: 12,054 - Favs: 7 - Follows: 14 - Updated: 2/21 - Published: 2/16
On the Illusion of Might by evevee reviews
We thought ourselves powerful, able to conquer a galaxy with nothing but toys. When we overcame every challenge, breached the space between the galaxies themselves, what use were the words of a race ashamed of their own past? Yet we cannot deny that we were warned, for while a challenge to a human is laughable, a challenge to humanity is a death sentence.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 26 - Words: 287,962 - Reviews: 1935 - Favs: 3,415 - Follows: 4,347 - Updated: 2/21 - Published: 2/21/2017 - Master Chief/John-117, Cortana, Garrus V., Shepard
Return of the Krogan by JManM reviews
Jack and Grunt have achieved godhood and become the masters of a universe. Now Grunt has unlocked the multiverse by harnessing the powers of his phallus and laid bare new possibilities for endless adventure. Very slow updates as I am focusing on other stories.
Crossover - X-overs & Mass Effect - Rated: M - English - Humor/Adventure - Chapters: 1 - Words: 677 - Reviews: 3 - Favs: 57 - Follows: 74 - Published: 2/21 - Jack, U. Grunt
Mass Effect SI: Ultimate Krogan by JManM reviews
This is my SI fic as Grunt that I have been posting on Webnovel. Story contains: coarse language, violence, and suggestive adult themes. By popular demand of my Webnovel audience this story has continued beyond Mass Effect into various crossovers currently including Star Wars, Skyrim, Gears of War, and will continue into Brutal Legend, Halo, X-men Evolution, and more to come.
Crossover - X-overs & Mass Effect - Rated: M - English - Romance/Adventure - Chapters: 117 - Words: 182,878 - Reviews: 98 - Favs: 299 - Follows: 309 - Updated: 2/21 - Published: 10/21/2021 - Jack, U. Grunt - Complete
Path of Blood by Soundwave and Cheshire reviews
When She woke up, She had no name and memories. Just a dream and a contract
Crossover - Mass Effect & Bloodborne - Rated: M - English - Adventure/Supernatural - Chapters: 2 - Words: 7,852 - Reviews: 3 - Favs: 12 - Follows: 16 - Updated: 2/20 - Published: 9/26/2021
HALO Mass convergence by SapphireDawn11709 reviews
Two Universe collide after the Forerunners fall and the Reapers return, will the two branches of Humanity placed in their respective Systems by a Forerunner Monitor unite or fall, only time will tell in this epic clash. When the UNSC Exploration and Research Vessel Light of Sol discover a strange artifact, they are opened up to the rest of the Galaxy after millennia of isolation.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 23 - Words: 79,389 - Reviews: 298 - Favs: 646 - Follows: 824 - Updated: 2/20 - Published: 9/18/2016 - Master Chief/John-117, Cortana, J. Garson, Tali'Zorah
Commanding Effect by vmoneywashere reviews
Based on the Command and Conquers general game. The Systems Alliance never materialized. Instead, a collection of advanced nation-states takes its place. How will the Citadel react when they meet a race so different from them in terms of technology and structure? Not well since they just allied themselves with the Quarians. P.S, I don't own Command and Conquer or Bioware.
Crossover - Command & Conquer & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 10 - Words: 42,424 - Reviews: 71 - Favs: 345 - Follows: 434 - Updated: 2/20 - Published: 8/13/2021 - [Tali'Zorah, Shepard] OC, Rael'Zorah
Audax Novus by A-01 reviews
A bold new world - A strange new reality - Fresh trials, tribulations, allies, and enemies. John fell through the portal from the Mantles Approach, but his luck works in mysterious ways. Now stranded in an alternate reality, how will he strive forward? The galaxy takes a sharp turn from the world we know, and the Reaper threat looms just as large, but no longer so uncontested.
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Romance - Chapters: 25 - Words: 656,164 - Reviews: 744 - Favs: 1,454 - Follows: 1,837 - Updated: 2/17 - Published: 9/4/2020 - [Master Chief/John-117, Miranda L.] [Shepard, Tali'Zorah]
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: 13 - Words: 52,234 - Reviews: 4 - Favs: 14 - Follows: 16 - Updated: 2/17 - 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: 42,374 - Reviews: 78 - Favs: 108 - Follows: 165 - Updated: 2/17 - Published: 1/28/2021
Spectre by Jonathan Palmer reviews
When the SSV Normandy is attacked Ashley convinces Shephard to to go with her. Follow their travels as Shephard makes it off the Normandy alive. Stranded on late 20th century Earth what will they do now? AU, Smart Harry, Female Shephard.
Crossover - Harry Potter & Mass Effect - Rated: M - English - Sci-Fi/Friendship - Chapters: 5 - Words: 17,206 - Reviews: 22 - Favs: 89 - Follows: 153 - Updated: 2/16 - Published: 1/20 - Harry P., Ashley W., Shepard
The Rise of the Enclave by 6-4 pilot reviews
Stuck in a more peaceful galaxy, the Tau of the Farsight Enclave must still prepare themselves for war against the forces that conspire to destroy it. But as they fight for their existence, elements from their old home come to strengthen their power in said old home.
Crossover - Warhammer & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 14 - Words: 82,014 - Reviews: 77 - Favs: 247 - Follows: 288 - Updated: 2/15 - Published: 4/20/2020 - Chaos Space Marines, Tau, Legion, Shepard
The Last Manhunter by Fire Wolf 2132 reviews
What was supposed to be the day of his greatest honor became the day of his greatest loss. Now in a world and a time he does not recognize, J'onn J'onzz must face a choice. He can easily hide himself and his abilities for his safety. Or, he can be what he was meant to be. A Manhunter.
Crossover - Justice League & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 10 - Words: 34,721 - Reviews: 77 - Favs: 224 - Follows: 302 - Updated: 2/15 - Published: 6/16/2021 - [J'onn J./Martian Manhunter, Tali'Zorah] Garrus V., Shepard
Whitley Shepard: The Commander's Brother by Hadrian Kallig reviews
Whitley Schnee couldn't take it anymore. The soul crushing loneliness was too much for the boy, and he ended up taking his life. However, in a twist of fate, an amnesiac Whitley ends up being found by Hannah Shepard. Years later, as a fresh faced engineering graduate, Whitley Shepard decides to join his sister's mission to hunt down Saren.
Crossover - Mass Effect & RWBY - Rated: M - English - Romance/Family - Chapters: 15 - Words: 32,695 - Reviews: 81 - Favs: 244 - Follows: 294 - Updated: 2/14 - Published: 4/20/2021 - [Garrus V., Shepard] [Whitley S., Tali'Zorah]
STAR WARS: The Dragon Effect Saga EPISODE ONE The Hidden Menace by jacques0 reviews
An odd little fusion between my favorite Bioware series thrown into a Star wars setting. So enjoy the read.
Crossover - Mass Effect & Dragon Age - Rated: T - English - Fantasy/Adventure - Chapters: 15 - Words: 38,605 - Reviews: 20 - Favs: 15 - Follows: 16 - Updated: 2/14 - Published: 6/7/2021
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