Mass Effect Crossovers
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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: 38 - Words: 682,367 - Reviews: 503 - Favs: 461 - Follows: 483 - Updated: 5/15 - Published: 9/13/2020 - Axel, Roxas, Xion, Shepard
Unknown events have unmeasurable answers by Watsi reviews
When someone contacts the Quarians about old machinery, they should think twice before engaging with a strange yet so familiar species, a war, and circumstances that will shock two galaxies now that the rift is open.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Drama - Chapters: 8 - Words: 49,663 - Reviews: 151 - Favs: 196 - Follows: 332 - Updated: 5/15 - Published: 4/21 - [Master Chief/John-117, Tali'Zorah] J. Cutter
The Yorha effect by Drarnegas reviews
5 years after the end of the 14 machine war, Yorha starts the long effort of rebuilding earth for mankind. When suddenly a new threats comes to their world. (Slight different ending of Nier automate and head-cannon. Slight OP Yorha.)
Crossover - Mass Effect & Nier - Rated: M - English - Sci-Fi - Chapters: 18 - Words: 38,044 - Reviews: 86 - Favs: 361 - Follows: 509 - Updated: 5/14 - Published: 5/13/2019
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: 5 - Words: 11,027 - Reviews: 8 - Favs: 32 - Follows: 38 - Updated: 5/14 - Published: 4/4 - Complete
Beyond Horizon: First Contact by Lostbasin reviews
Horizon Zero Dawn/Mass Effect/Overwatch crossover. The world ended and there was nothing we could do to stop it. Not by the Omnics we fought against, but by the very weapon we made to combat them. It was only the vision of Dr. Sobeck that humanity now has a chance to rebuild out of the ashes of our extinction. But now we're not alone, on our planet or the galaxy at large.
Crossover - Mass Effect & Horizon Zero Dawn - Rated: T - English - Sci-Fi/Adventure - Chapters: 4 - Words: 43,469 - Reviews: 59 - Favs: 276 - Follows: 367 - Updated: 5/13 - Published: 6/6/2019 - GAIA, Elisabet S.
The Ghoul Effect by storyseeker7 reviews
Humans and Ghouls two species who by natures design should have destroyed one or the other in bloody war of survive. But the actions of a few mange prevent such an event from occurring, and now two species work together for a better future. How will they react to a galaxy for of different races, and how will the galaxy react to the unique relationship between these two races?
Crossover - Mass Effect & Tokyo Ghoul/東京喰種トーキョーグール - Rated: M - English - Sci-Fi - Chapters: 28 - Words: 245,362 - Reviews: 227 - Favs: 564 - Follows: 664 - Updated: 5/13 - Published: 1/2/2019
Mass Effect - Orion by Fallen2Pancake reviews
This is a Mass Effect - Halo - XCOM Crossover. In the year 2084 during the Asteroid Belt Offensive XCOM Elite Unit Strike-1 discovers an Ethereal Station but must Psionic Teleport away but something goes wrong. In the Year 2552 the UNSC Fearless an Orion-Class Assault Carrier is forced to escape Reach under heavy fire, during the Slipsapce Transit something goes wrong.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 8 - Words: 61,867 - Reviews: 67 - Favs: 144 - Follows: 206 - Updated: 5/13 - Published: 4/16 - SPARTAN-B312/Noble Six, Rookie, D. Anderson, Shepard
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: 11 - Words: 171,998 - Reviews: 175 - Favs: 409 - Follows: 504 - Updated: 5/13 - Published: 12/28/2020 - OC, U. Wrex, Shepard, Councilor Tevos
Unique by reinDank
sequel to Hunting an Yagami. Commander Shepard is unique.
Crossover - Ranma & Mass Effect - Rated: K+ - English - Supernatural/Family - Chapters: 2 - Words: 1,153 - Favs: 3 - Follows: 5 - Published: 5/13 - Ranma, Shepard - Complete
War and peace by Curiously intrigued reviews
The reapers brings new galactic superpowers into the war after invading the Orion arm of the galaxy. will the conflict unite them against a common foe or will they open conflict with each other.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 2 - Words: 2,510 - Reviews: 12 - Favs: 39 - Follows: 70 - Updated: 5/11 - Published: 5/5
Mass Effect: ODST Lost by Stardew's Stardrop reviews
ODST Captain Nathanial Renkov unintentionally becomes the first Helljumper to survive being dropped through a Slipspace anomaly. The problem? He has no idea where is and is surrounded by aliens the UNSC has no record of. Even worse? No one knows what the UNSC is. Follow his story as he tries to make sense of his new surroundings while trying to survive a new galactic threat.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 4 - Words: 15,072 - Reviews: 16 - Favs: 73 - Follows: 114 - Updated: 5/11 - Published: 4/24 - OC, Ashley W., Tali'Zorah, Shepard
Mass Foundations by Nord Ronnoc reviews
There are universes that diverge from a choice and there are universes that are fundamentally different from one another, forming a vast, limitless multiverse. In these set of universes, there are orbs that manipulate and alter any reality, rip apart the boundaries between them. If left unchecked, they will bring an end of everything. Welcome to the multiverse. Enjoy your stay.
Crossover - Mass Effect & Game X-overs - Rated: M - English - Sci-Fi/Adventure - Chapters: 24 - Words: 102,972 - Reviews: 37 - Favs: 110 - Follows: 88 - Updated: 5/11 - Published: 12/16/2012 - Shepard
RWBY Effect by Owriush reviews
The Breach has been dealt with and team RWBY needs a break, but not before they are sent to stop a sudden Grimm gathering. Now they seem to have ended up in a different world with its own humans living along side various alien species. Join Shepard and her crew along with team RWBY as they fight to stop a darkness from rising. P.S WhiteRose and BumbleBee paring plus FemShepXTali
Crossover - Mass Effect & RWBY - Rated: T - English - Adventure/Romance - Chapters: 44 - Words: 718,255 - Reviews: 128 - Favs: 327 - Follows: 331 - Updated: 5/11 - Published: 9/16/2015
Of Shepards and Dragonkin by Mandrake109 reviews
As the fires fade once again, siblings are drawn together. Tragedy forces desperate actions, and stranger consequences. Amid twisted, frozen, bones of steel, fate decrees a meeting of lost and broken people, who just may be able to mend each other. When the cycle ends, the abyss awakens… Rated M for safety
Crossover - Mass Effect & Dark Souls - Rated: M - English - Sci-Fi/Fantasy - Chapters: 6 - Words: 33,468 - Reviews: 42 - Favs: 107 - Follows: 168 - Updated: 5/8 - Published: 7/18/2020 - Shepard, Priscilla, Company Captain Yorshka
The Prelude of War by Indigard reviews
A very different Mass Effect galaxy encounters a strange and relentless invader that is on constant hunger for Biomass but they never know it's just a glimpse of what coming for them. Featuring: alternative history for every species, a bigger and more populated galaxy, cunning Asari, militarized and germanized human empire.
Crossover - Warhammer & Mass Effect - Rated: T - English - Chapters: 3 - Words: 58,539 - Reviews: 11 - Favs: 36 - Follows: 41 - Updated: 5/7 - Published: 11/6/2021 - Imperial Guard, Tyranids, OC, Shepard
Glory to the Imperium! by V-rcingetorix reviews
Astartes Shepard has been assigned a new task: to escort strange alien civilians to a site within Imperium borders. The Emperor Renewed has issued a personal directive that preparations are to take place, an alien race seeks to destroy the peace achieved within the Imperium's holy borders. My first foray into the 40k 'verse, insight would be helpful.
Crossover - Warhammer & Mass Effect - Rated: T - English - Drama/Adventure - Chapters: 2 - Words: 25,369 - Reviews: 32 - Favs: 130 - Follows: 158 - Updated: 5/7 - Published: 11/15/2021
The Way the World Ends by Canelo312 reviews
AU. Spartans never die. But we all know that's not true. A terrifying new enemy approaches and only time will tell if the forces that be can stop them.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 1 - Words: 25,002 - Reviews: 6 - Favs: 36 - Follows: 46 - Published: 5/7 - Master Chief/John-117, SPARTAN-B312/Noble Six, Liara T'Soni, Shepard
StellarEffect: The Imperial Chronicles by Jack Smith1 reviews
The Empire is in a time of Peace and prosperity, After Crown Princess Sarah Led the Fremas Offensive during the Fremas Rebellion where Imperial Forces clashed with Traitors and Renegade Elements of Imperial Society, Only for the Empire to finally Emerge Triumphant, But a new threat emerges and a Whole new galaxy is now aware of them, Irene Protects, Let no one be found wanting.
Crossover - Mass Effect & Stellaris - Rated: M - English - Sci-Fi/Drama - Chapters: 6 - Words: 19,592 - Reviews: 13 - Favs: 66 - Follows: 77 - Updated: 5/7 - Published: 1/16 - [Shepard, Ashley W.] Admiral Hackett, OC
Technophiles and Militarists by thelordofdarkreunion reviews
The Reaper invasion is nigh. Outnumbered and outgunned, the Citadel must turn to two new, dangerous allies for salvation: the Adeptus Mechanicus and Imperium of Man.
Crossover - Warhammer & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 20,759 - Reviews: 70 - Favs: 160 - Follows: 227 - Updated: 5/7 - Published: 4/22 - Imperial Guard, Space Marines, Adeptus Mechanicus, Shepard
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: 3 - Words: 17,798 - Reviews: 46 - Favs: 99 - Follows: 151 - Updated: 5/7 - Published: 2/6 - E. Buck, OC
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: 16 - Words: 34,855 - Reviews: 86 - Favs: 269 - Follows: 319 - Updated: 5/7 - Published: 4/20/2021 - [Garrus V., Shepard] [Whitley S., Tali'Zorah]
A new world, the same old struggle by O pior reviews
A psychic soldier and survivor from the ruins of Fairport finds himself in a new world with apparently a chance to start over. But when the demons of his past threaten to resurface, he must prevent this new world from falling victim to another supernatural damage, running into a certain commander in a quest to save the galaxy in the process.
Crossover - Mass Effect & F.E.A.R. - Rated: T - English - Adventure/Supernatural - Chapters: 4 - Words: 28,893 - Reviews: 16 - Favs: 62 - Follows: 79 - Updated: 5/5 - Published: 6/7/2021 - OC, Tali'Zorah, Shepard, Alma W.
Star-Bound by The Incredible Muffin reviews
Some destinies are written out centuries, or even millennia, ahead of time. However, when destiny is derailed, new plans have to be implemented. Sometimes, that involves ripping someone away from the peaceful end they seek and thrusting them into a tide of never-ending war in order to fix what can never be repaired.
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Supernatural - Chapters: 35 - Words: 239,980 - Reviews: 1003 - Favs: 1,212 - Follows: 1,504 - Updated: 5/5 - Published: 5/29/2019
The Return of Hope by Masso 2010 reviews
Commander Shepard is dead. Knowing that they needed someone to complete his work fighting against the Reapers, The Illusive Man set his sights on the next best thing, Humanities greatest hero. The only problem is that Superman gave up on hero work a long time ago but can the threat of galactic extinction be enough for him to once again step into the light.
Crossover - Superman & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 13 - Words: 105,575 - Reviews: 186 - Favs: 429 - Follows: 504 - Updated: 5/5 - Published: 7/10/2020 - Clark K./Kal-El/Superman, Miranda L.
All the Stars by BlueWay reviews
When the Long Night of Solace is evaporated over Reach via the weaponized usage of a Slipspace Drive, it ferries with it in its swallowed sections the Covenant Empire and, more horrifyingly, the desperate measures that the UNSC used to fight them. When they are found in a universe on the precipice of their own history, the meaning of the term "Mass Effect" will change forever.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 39 - Words: 688,994 - Reviews: 1075 - Favs: 1,500 - Follows: 1,844 - Updated: 5/4 - Published: 6/8/2018 - SPARTAN-B312/Noble Six, Rookie
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