Mass Effect Crossovers
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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
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: 35,224 - Reviews: 21 - Favs: 159 - Follows: 227 - 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: 87 - Favs: 154 - Follows: 234 - 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: 87 - Favs: 382 - Follows: 532 - 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: 41 - Follows: 44 - 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: 316 - Follows: 424 - Updated: 5/13 - Published: 6/6/2019 - GAIA, Elisabet S.
Mass Effect - Orion (Discontinued) 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: 167 - Follows: 242 - Updated: 5/13 - Published: 4/16 - SPARTAN-B312/Noble Six, Rookie, D. Anderson, Shepard
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: 4 - Follows: 7 - 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: 47 - Follows: 86 - 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: 20 - Favs: 95 - Follows: 144 - 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: 112 - Follows: 93 - 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: 43 - Favs: 115 - Follows: 174 - 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: 33 - Favs: 150 - Follows: 185 - 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: 47 - Follows: 69 - Published: 5/7 - Master Chief/John-117, SPARTAN-B312/Noble Six, Liara T'Soni, Shepard
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: 69 - Follows: 90 - Updated: 5/5 - Published: 6/7/2021 - OC, Tali'Zorah, Shepard, Alma W.
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: 209 - Favs: 1,144 - Follows: 1,659 - Updated: 5/4 - Published: 2/24/2015 - Harry P.
The Irregular Blade Effect by ferduran reviews
Sequel of Unlimited Rettousei. Had you ever wondered what would happen if the Citadel council meet a species that all its members have powers like the Asari but different, has a stronger military like the Turian, and tech more advance than the Salarian. All that without element zero, but more importantly, they do not want to follow their orders.
Crossover - Fate/stay night & Mass Effect - Rated: M - English - Fantasy/Sci-Fi - Chapters: 3 - Words: 29,985 - Reviews: 77 - Favs: 432 - Follows: 563 - Updated: 5/4 - Published: 12/8/2021
The Star Union by ImageViewer reviews
In the Year 2015, Earth was attacked by an unknown Alien Empire. With X-com they fought the alien menace again and again, overcoming the Odds and Forging a new Empire comprised of the former enemies enslaved to the Elder's will. Now forged into an empire the likes of which the galaxy hasn't seen, they take their first steps into the great Unknown. Major Crossovers and OCs.
Crossover - Mass Effect & X-Com - Rated: M - English - Sci-Fi/Adventure - Chapters: 4 - Words: 34,517 - Reviews: 19 - Favs: 244 - Follows: 333 - Updated: 5/2 - Published: 7/17/2021 - Liara T'Soni, Tali'Zorah, Shepard, OC
Mass Emile by Ranschaj reviews
Emile survives the two zealots at the end of Reach, and after surviving Covenant onslaught, finds himself in the ME universe. Kick-ass picture is thanks to freejimmy on deviantart
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 9 - Words: 68,922 - Reviews: 844 - Favs: 1,026 - Follows: 1,211 - Updated: 5/1 - Published: 12/11/2012 - Emile-A239/Noble Four
Lunar Incident by Konradoziom reviews
After the discovery of the Prothean ruins in 2128, the nations of the world formed the System Alliance as a military alliance against the alien threat. However, in 2137, the Lunar Incident threatened to fragment the alliance. However, a new discovery could spur the entire history of mankind. The game for mankind's survival has begun.
Crossover - Mass Effect & Touhou Project - Rated: K+ - English - Mystery/Sci-Fi - Chapters: 7 - Words: 20,373 - Reviews: 10 - Favs: 38 - Follows: 47 - Updated: 4/30 - Published: 3/21 - Complete
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: 11 - Words: 38,075 - Reviews: 88 - Favs: 274 - Follows: 374 - Updated: 4/28 - Published: 6/16/2021 - [J'onn J./Martian Manhunter, Tali'Zorah] Garrus V., Shepard
We Decide Our Own Future by Merriest Wood reviews
Xavier Holmes, a simple programmer and over all shut-in was killed during a bank robbery. however, instead of staying dead he was reborn as an A.I and transported to the Star Trek universe. Xavier didn't how it was possible but one thing was clear he'd decide his own future. I do not own anything of Mass Effect or Star Trek.
Crossover - StarTrek: The Original Series & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 9 - Words: 43,369 - Reviews: 105 - Favs: 293 - Follows: 379 - Updated: 4/28 - Published: 2/12 - OC
Halo: A New Journey by mgarner3199 reviews
Master Chief wakes up in the Mass Effect universe and joins Commander Shepard in an effort to stop the Reapers. With time running out, can they stop the extinction of every species, or will they fade into legend?First, they got to stop the Reapers though...
Crossover - Halo & Mass Effect - Rated: K - English - Sci-Fi/Romance - Chapters: 3 - Words: 3,002 - Reviews: 15 - Favs: 36 - Follows: 66 - Updated: 4/27 - Published: 12/7/2021 - Cortana, Master Chief/John-117, Illusive Man, Shepard
The Canadian Commonwealth by Vassago1991 reviews
In the vast multiverse events can happen that should never happen this is the story of one such event in a a universe that was should never have been.
Crossover - Halo & Mass Effect - Rated: M - English - Chapters: 3 - Words: 17,333 - Reviews: 14 - Favs: 48 - Follows: 54 - Updated: 4/26 - Published: 2/24
Mass Effect: Unicorn by AKnightsJar reviews
Death. It is something that doesn't discriminate. Many see it as the end though, for most who have experienced it, it is simply the beginning. Thus, I march onwards with my Gundam in this world unaware of the dark truths behind Mass Effect and the Relays.
Crossover - Gundam UC & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 1 - Words: 2,214 - Reviews: 4 - Favs: 48 - Follows: 61 - Published: 4/23 - OC
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