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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: 27 - Words: 234,458 - Reviews: 220 - Favs: 550 - Follows: 650 - Updated: 3/18 - Published: 1/2/2019
In the Arms of Eternity by Autumn Reign reviews
In the midst of a staid galaxy, life can be anything but chaotic. Yet, underneath the glitz and glam, the evils of reality still lurk. Old conspiracies, horrific experiments, racial supremacy—it's all laid bare as magic and science intertwine. And as the old gods make their move, the denizens of the galaxy are left wondering: who, or what, are we to believe in?
Crossover - Fate/stay night & Mass Effect - Rated: M - English - Drama/Mystery - Chapters: 4 - Words: 22,781 - Reviews: 26 - Favs: 103 - Follows: 138 - Updated: 3/18 - Published: 2/24/2021 - Archer, Garrus V., Councilor Tevos
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: 24 - Words: 181,467 - Reviews: 1572 - Favs: 4,288 - Follows: 4,965 - Updated: 3/16 - Published: 6/5/2013 - Saren A., Shepard, OC
Blue Flames by n7kairos reviews
Shepard ends up on Middle Earth after being caught up in the Crucible explosion. Follow her now as she slowly but surely becomes embroiled in a new war.
Crossover - Mass Effect & Lord of the Rings - Rated: M - English - Fantasy/Sci-Fi - Chapters: 8 - Words: 17,837 - Reviews: 16 - Favs: 50 - Follows: 78 - Updated: 3/16 - Published: 12/6/2019 - J. Garson, Gandalf
Mass Effect:Titans by Chronos0305 reviews
Giants of all kinds in outer space. The citadel and the entire galaxy is forever changed
Crossover - Mass Effect & X-overs - Rated: T - English - Sci-Fi - Chapters: 1 - Words: 1,958 - Reviews: 2 - Favs: 17 - Follows: 13 - Published: 3/16 - Complete
A New Effect by KingKaper
The Galaxy is a dark and mysterious place, even for those who think they have it all figured out. Humans were sure that Pokemon were the strongest beings in this dimension, however Shepard and all living beings will be reeducated, there are dark places even Giratina fears
Crossover - Pokémon & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 2 - Words: 5,347 - Favs: 18 - Follows: 22 - Published: 3/16 - Shepard, Red
Normandy Crew Reacts to RWBY by Helljumper206 reviews
After doing the impossible again beating back the Collectors. Shepard and crew are now displayed and forced to watch a show connected to the Commander's hidden past. An AU of "The Reaper's Summer." "T for Language"
Crossover - Mass Effect & RWBY - Rated: T - English - Chapters: 3 - Words: 8,990 - Reviews: 65 - Favs: 201 - Follows: 259 - Updated: 3/14 - Published: 3/25/2021 - Garrus V., Tali'Zorah, Shepard, Summer R.
Mass Effect: The Hammer of War by IX404 reviews
When fighting against Tyranids on a far flung Civilized World, Primaris Space Marine Marcus Tyrellus expects it to be like every other day in the Imperium of Man. Little does he know is that, he, and a few others, will soon be working to save another universe from destruction at the hands of an ancient foe.
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 15 - Words: 77,860 - Reviews: 110 - Favs: 185 - Follows: 253 - Updated: 3/14 - Published: 1/27 - Imperial Guard, Space Marines, OC, Shepard
Lost Son of Terra Phoenix by Ares007 reviews
For eons past, they enjoyed the harvest of their farms. Countless civilizations breathed life because they allowed it. Now, they will die because he demands it. Halo/Mass Effect but with heavy elements from Warhammer 40k. M-Shep/Miranda, OC/Liara. HFY
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Romance - Chapters: 10 - Words: 62,084 - Reviews: 38 - Favs: 116 - Follows: 151 - Updated: 3/14 - Published: 11/29/2021 - [SPARTAN-B312/Noble Six, Oriana L.]
El salto cero a una galaxia muy muy lejana by Kixtia reviews
Algunos escucharon las advertencias de Shepard, pero el enemigo ataco muy pronto. Así que como ultimo recurso la estación salto cero usa tecnología experimental y es transportada a las regiones inexploradas de una galaxia muy muy lejana. Soy fan de legends pero concuerdo con Templin Insitute y el canon actual esta muy desaprovechado. Derechos a quien corresponda
Crossover - Star Wars & Mass Effect - Rated: T - Spanish - Adventure/Sci-Fi - Chapters: 8 - Words: 8,189 - Reviews: 2 - Favs: 2 - Follows: 3 - Updated: 3/13 - Published: 11/5/2021 - OC, OC
Nehekhara effect by 6-4 pilot reviews
The Tomb Kings are victorious. The world is theirs and Chaos is banished from their world. Now they turn to the stars to claim everything in the name of the Imperisable.
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 13 - Words: 43,746 - Reviews: 51 - Favs: 110 - Follows: 163 - Updated: 3/11 - Published: 5/29/2021 - Tomb Kings, Wood Elves, Warriors of Chaos
In Shepard?, We Trust? by ghirahim reviews
Humanity's done some pretty screwed-up things in the past, but they might be getting some much-needed redemption (mostly from self-inflicted failures) when one of theirs gets recommended to become a Spectre. While the entire galaxy watches, assuming they're properly ready for humanity's first Spectre, no amount of preparation is adequate for this "J. Shepard." Maker help us all.
Crossover - Mass Effect & Outer Worlds - Rated: M - English - Humor/Sci-Fi - Chapters: 2 - Words: 14,590 - Reviews: 3 - Favs: 11 - Follows: 12 - Updated: 3/9 - Published: 12/17/2020 - D. Anderson, Shepard, The Captain
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: 6 - Words: 19,254 - Reviews: 30 - Favs: 120 - Follows: 207 - Updated: 3/8 - Published: 1/20 - Harry P., Ashley W., Shepard
Galactic Hero's Effect by fitoxi reviews
'Returner':This Quirk sent Izuku to another world, only to return him to Quirk world aferwards, retaining all the powers he had obtained. Unfortunately, no one will believe him if he tries to reveal the origin of his others Quirks, 'Biotics/Omnitool' and much less will they believe the tale that he was the greatest hero of an entire galaxy [Izuku OOC/Initially,Vigilant/3 Romances]
Crossover - Mass Effect & My Hero Academia/僕のヒーローアカデミア - Rated: T - English - Adventure/Romance - Chapters: 2 - Words: 16,183 - Reviews: 11 - Favs: 113 - Follows: 154 - Updated: 3/8 - Published: 3/3 - [Liara T'Soni, Tali'Zorah, Himiko Toga, Izuku M.]
Héroe De Una Galaxia Distante by fitoxi reviews
'Retornador'; El Quirk que envio a Izuku a otro mundo, para luego regresarlo de vuelta, conservando todos los poderes que había ganado. Lamentablemente, nadie le creera si intenta revelar el origen de sus otros Quirks, 'Bioticos/Omniherramienta' y menos se creeran el cuento de que fue el más grande héroe de una galaxia. [Izuku OOC/Inicialmente, Vigilante/Harem ( Solo 3 parejas)]
Crossover - Mass Effect & My Hero Academia/僕のヒーローアカデミア - Rated: T - Spanish - Adventure/Romance - Chapters: 2 - Words: 13,681 - Reviews: 2 - Favs: 6 - Follows: 10 - Updated: 3/7 - Published: 3/3 - [Liara T'Soni, Himiko Toga, Tali'Zorah, Izuku M.]
Maelstrom Effect Book 2: Shadows of Crimson by godospartan the Kitsune reviews
After Soverign's defeat, the sibling Commanders left to clean up the mess it left behind. But one of them was struck down by an unknown force. The next 2 years they go in search of the ones responsible, unknowing that a secret group is bringing their sibling back to life to fight the Reapers again. How will they react when they meet again? NaruxTali, Shakarian, Mature content later
Crossover - Naruto & Mass Effect - Rated: M - English - Sci-Fi/Hurt/Comfort - Chapters: 9 - Words: 113,066 - Reviews: 59 - Favs: 283 - Follows: 324 - Updated: 3/6 - Published: 12/25/2019 - Naruto U., J. Garson, Garrus V., Tali'Zorah
Deliverance by HumanTsunami reviews
He has travelled the breadth of the wasteland multiple times over. From California to Washington DC to Colorado. He has delivered news and salvation. She has sacrificed everything for the Universe she loves. She came from nothing but she died with everything she could have hoped for. What happens when two unstoppable legends meet. The rules will change but war, war never changes.
Crossover - Fallout & Mass Effect - Rated: M - English - Drama/Adventure - Chapters: 7 - Words: 35,520 - Reviews: 17 - Favs: 64 - Follows: 109 - Updated: 3/5 - Published: 5/30/2021 - Courier, Shepard
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: 5 - Words: 14,494 - Reviews: 11 - Favs: 35 - Follows: 51 - Updated: 3/5 - Published: 2/5 - Aokiji/Kuzan, Shepard
Jumping Eldarlike to Another Universe by Vivori reviews
A half-Eldar, hidden secret of her father, a goddess of healing that does not know how to fight, a simple Seer and her best friend Howling Banshee got the one way ticket to fell into the ME Universe. Of course to add problems to their opportunity of new life, the Reapers are coming to cleanse this universe of every sentient being. What to do? What to do indeed?
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 10 - Words: 53,301 - Reviews: 85 - Favs: 147 - Follows: 195 - Updated: 3/4 - Published: 4/19/2020 - Eldar, Primarch/s, Liara T'Soni, Shepard
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: 2 - Words: 23,500 - Reviews: 17 - Favs: 92 - Follows: 142 - Updated: 3/4 - Published: 11/20/2021
Great Effort and A Hand by DemonKnight312 reviews
Alyssa wanted closure after returning to the land of the living, which in turn led to her bringing back an ancient warrior trapped by a devious would be god. The remains of his world left as a husk, the Dragonborn joins the Commander on her quest to save the Universe.
Crossover - Elder Scroll series & Mass Effect - Rated: M - English - Fantasy/Sci-Fi - Chapters: 4 - Words: 18,065 - Reviews: 35 - Favs: 139 - Follows: 224 - Updated: 3/4 - Published: 5/23/2021 - Dragonborn/Dovahkiin, Shepard
Iron Within by Akashic Silhouette reviews
Jane stared at him, confusion crawling into her expression, but she thought back to how many times Soter astonished her, she thought about Astartes and psychic power and the cruellest regime imaginable, and she thought about the even crueller trans-human madmen that sieged it. She thought about Soter the Space Marine, Soter the Iron Warrior... "Okay. Do it." One-shot in Iron Effect
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Drama - Chapters: 1 - Words: 3,921 - Reviews: 6 - Favs: 13 - Follows: 12 - Published: 2/28 - OC, Shepard - Complete
The End of Eternity: Rise of the Terran Alliance by Icarus636 reviews
No Gods, No Kings REWRITTEN: Through intervention the dream of Rapture never became a nightmare, instead new technologies and beliefs pave the way for Humanity to unite as one and seek a new future among the stars. The Council finds itself confronting a civilization that has surpassed every technological shackle and overcame every obstacle thrown their way: The Terran Alliance.
Crossover - Mass Effect & BioShock - Rated: T - English - Sci-Fi/Mystery - Chapters: 20 - Words: 233,230 - Reviews: 313 - Favs: 1,139 - Follows: 1,479 - Updated: 2/28 - Published: 8/6/2019 - Tali'Zorah, Shepard, Eleanor L., Elizabeth
The Crusade of the Lost by Ninoslav reviews
A fleet of Imperial reinforcements, Mechanicus detachment and a chapter of White Eagles meant for Cadian sector are swallowed in the unruly sea that is Warp caused by the Great Game of the Protector of Mankind against the Chaos Gods. They emerge into a new universe, one without the Emperor, their faith strong, they will see this galaxy conquered.
Crossover - Warhammer & Mass Effect - Rated: T - English - Sci-Fi/Horror - Chapters: 26 - Words: 187,676 - Reviews: 268 - Favs: 438 - Follows: 545 - Updated: 2/26 - Published: 8/16/2019
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: 53 - Favs: 162 - Follows: 222 - Updated: 2/26 - Published: 2/14 - Complete
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