Mass Effect Crossovers
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The Way Forward by BigGsmallp reviews
Lost and adrift in the greatest of all seas, Kuzan attempts to find himself in their new life, and hopefully find redemption
Crossover - One Piece & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 6 - Words: 17,727 - Reviews: 14 - Favs: 55 - Follows: 75 - Updated: 5/20 - Published: 2/5 - Aokiji/Kuzan, Shepard
Mass Effect Crosover by jetslinger333 reviews
This fiction has different type of mass effect crossover ideas and other types as well, read and review if you like the series I wrote it. Next Update Iron Blooded Orphans x Rinne no Langrange
Crossover - Mass Effect & Kamen Rider - Rated: T - English - Sci-Fi/Adventure - Chapters: 25 - Words: 79,018 - Reviews: 37 - Favs: 37 - Follows: 37 - Updated: 5/19 - Published: 5/18/2014
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: 32 - Words: 105,917 - Reviews: 40 - Favs: 218 - Follows: 220 - Updated: 5/17 - Published: 8/2/2019
Temporal Displacement with Gamer Characteristics by Keywielder reviews
As if shifting between the real world and Elite-verse when I had just graduated from Senior High for a few months wasn't enough, now they're telling me that it was a goddamned Beta THE WHOLE TIME, after FIVE FUCKING YEARS of God knows what in the actual fuck and ONLY NOW I get the full release! Fuck it. Let's just roll with this crap... Gamer, OC, SI. Current World: Mass Effect.
Crossover - Mass Effect & Elite Dangerous - Rated: M - English - Sci-Fi - Chapters: 3 - Words: 35,158 - Reviews: 20 - Favs: 142 - Follows: 206 - Updated: 5/16 - Published: 11/20/2021
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: 14 - Words: 72,595 - Reviews: 86 - Favs: 141 - Follows: 221 - Updated: 5/16 - Published: 2/21
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: 370 - Follows: 520 - 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: 36 - Follows: 40 - 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: 291 - Follows: 388 - 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: 570 - Follows: 670 - 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: 69 - Favs: 165 - Follows: 235 - 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: 176 - Favs: 414 - Follows: 511 - 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: 44 - Follows: 81 - 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: 81 - Follows: 123 - 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: 92 - Updated: 5/11 - Published: 12/16/2012 - Shepard
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: 109 - Follows: 168 - Updated: 5/8 - Published: 7/18/2020 - Shepard, Priscilla, Company Captain Yorshka
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: 138 - Follows: 170 - 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: 7 - Favs: 42 - Follows: 59 - 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: 67 - Follows: 78 - Updated: 5/7 - Published: 1/16 - [Shepard, Ashley W.] Admiral Hackett, OC
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: 47 - Favs: 105 - Follows: 160 - 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: 87 - Favs: 276 - Follows: 325 - 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: 63 - Follows: 82 - 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: 1008 - Favs: 1,222 - Follows: 1,519 - Updated: 5/5 - Published: 5/29/2019
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: 1080 - Favs: 1,506 - Follows: 1,850 - Updated: 5/4 - Published: 6/8/2018 - SPARTAN-B312/Noble Six, Rookie
Potter Effect by FalcoSubbuteo reviews
After the second wizarding war, Harry and Hermione uncover evidence that magic is not a naturally occurring phenomena, and believe that someone interfered with evolution. They could never realize how right they were and how much this knowledge might affect the future. A century and a half later Harry, the last surviving magical, heads out into the galaxy to search for answers.
Crossover - Harry Potter & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 6 - Words: 43,221 - Reviews: 206 - Favs: 1,120 - Follows: 1,626 - Updated: 5/4 - Published: 2/24/2015 - Harry P.
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