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Mass Effect-Batman: Crisis On The Citadel by James Keller reviews
After 2 years of operating on Omega, The Dark Knight comes to the Citadel in pursuit of a dangerous new drug that is about to be unleashed upon the very heart of Council Space. This will put him into an alliance with Lt. Garrus Vakarian of C-Sec's Major Crimes Unit as they uncover a massive Conspiracy.
Crossover - Mass Effect & Batman - Rated: M - English - Crime/Mystery - Chapters: 3 - Words: 21,240 - Reviews: 7 - Favs: 19 - Follows: 23 - Updated: 2/13 - Published: 10/29/2021 - Bruce W./Batman, Garrus V., Liara T'Soni, Tali'Zorah
Enduring the Flames of War by Masterdude21 reviews
A joint Asari-Turian operation salvaged a "package" from a derelict wreckage in the Terminus Systems, whereupon they release a force of war beyond their reckoning. Hoping to avoid another war, Commander Shepard recruits the "package" into her team. A simple act of kindness, unwittingly paving the way for a clash unlike the galaxy has ever seen. Fate directs the flames of war.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Horror - Chapters: 42 - Words: 599,482 - Reviews: 2177 - Favs: 3,396 - Follows: 4,174 - Updated: 2/13 - Published: 11/30/2015 - Master Chief/John-117, OC, Shepard
Imperial Scales by Lighting wolf knight reviews
To them? the fact that they were entirely thrown into a new battlefield was entirely amusing. Next chapter will be delayed. Rated T for violence, death, and profanity.
Crossover - Warhammer & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 816 - Reviews: 4 - Favs: 8 - Follows: 7 - Published: 2/12 - [OC, Nyreen K.] Space Marines
Earth's Defense by shdowstep reviews
It was too late. Despite the warnings given, the Reapers made their way to Earth, and the Harvest began once more. But the Reaper's miscalculated. Humanity was not alone on Earth - Gaia and Alaya existed as well. And they already had various plans in place to survive an extinction level event.
Crossover - Fate/stay night & Mass Effect - Rated: T - English - Chapters: 2 - Words: 2,468 - Reviews: 38 - Favs: 182 - Follows: 275 - Updated: 2/11 - Published: 2/5
Of Shepards and Imperials by Mandrake109 reviews
One of the oldest living perpetuals along with the remains of an inquisitorial retinue are transported into an alternative past where aliens are not simply foes to slay but friends and allies to mankind. For the perpetual it's a nice change of pace for the others? Well they may learn that co-existence might not be such a bad thing after all... Rated M for obvious reasons.
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Fantasy - Chapters: 7 - Words: 83,393 - Reviews: 57 - Favs: 165 - Follows: 227 - Updated: 2/11 - Published: 3/7/2019 - Imperial Guard, OC, Shepard
Another Place, Another Time by Snafu1000 reviews
AU. Erin Shepard. Talia Cousland. Alistair Theirin. A resurrected Spectre and her two best friends are trying to save the galaxy, but a side mission to take on the Shadow Broker complicates the hell out of the life of one grouchy grunt who just wants to keep things simple.
Crossover - Mass Effect & Dragon Age - Rated: M - English - Adventure/Romance - Chapters: 7 - Words: 30,632 - Reviews: 51 - Favs: 31 - Follows: 38 - Updated: 2/11 - Published: 7/26/2015
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: 29 - Words: 100,847 - Reviews: 40 - Favs: 197 - Follows: 198 - Updated: 2/11 - Published: 8/2/2019
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: 4 - Words: 14,037 - Reviews: 8 - Favs: 46 - Follows: 54 - Updated: 2/11 - Published: 1/16 - [Shepard, Ashley W.] Admiral Hackett, OC
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: 34 - Words: 231,850 - Reviews: 971 - Favs: 1,159 - Follows: 1,458 - Updated: 2/10 - Published: 5/29/2019
Sudden Terminus by A Very Thirsty Megalomaniac reviews
The end is nigh. Sequel to Sudden Contact and Sudden Supremacy. Finale of the Sudden Series. The outcome is uncertain.
Crossover - StarCraft & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 20 - Words: 117,960 - Reviews: 127 - Favs: 244 - Follows: 259 - Updated: 2/9 - Published: 10/22/2017 - Zeratul, Saren A., Javik, Tarquin Victus
Fall of the Citadel (Re Write) by UnicronEatsTheCitadel reviews
Skynet will not go quietly into the night. This cycle may be different. The future is not set.
Crossover - Terminator & Mass Effect - Rated: T - English - Sci-Fi/Suspense - Chapters: 2 - Words: 1,555 - Reviews: 11 - Favs: 57 - Follows: 109 - Updated: 2/9 - Published: 6/25/2020 - Skynet, OC, Illusive Man, Hannah S.
The Eternal Lord 40k - ME by HellFox83 reviews
A battle against the forces of Chaos strands a Necron lord in the galaxy of Mass Effect. With what's left of his dynasty under his banner, Veronakh Lord of Solvatakh intends to lead his people to glorious conquest. Can Commander Shepard stop the Collectors and curtail the ambitions of the Necrons?
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 19 - Words: 198,398 - Reviews: 92 - Favs: 277 - Follows: 391 - Updated: 2/9 - Published: 6/13/2020 - Necrons, Shepard
Mass Effect: Ages of Myst by IX404 reviews
Upon his mother's death, Garrus, and his father Castis, learns of a book that she was gifted shortly before her passing. What neither of them know, is that they will soon journey on an adventure across the Ages, while solving the mysteries of Myst, Riven, and beyond.
Crossover - Myst/Riven & Mass Effect - Rated: T - English - Adventure/Suspense - Chapters: 7 - Words: 37,103 - Reviews: 6 - Favs: 7 - Follows: 10 - Updated: 2/9 - Published: 1/20 - Atrus, Catherine, Garrus V.
The Ruby of Cerberus by Scrambleman17 reviews
1 week before classes start again, team RWBY watched a report relaying to a strange light at Vale's industrial district, what they didn't know is that it would lead them to another dimension quite different from their own, and unwillingly trap themselves in this strange dimension. contains liberties with canon from both franchises and inevitable OCs.
Crossover - Mass Effect & RWBY - Rated: M - English - Sci-Fi/Adventure - Chapters: 12 - Words: 57,996 - Reviews: 25 - Favs: 54 - Follows: 82 - Updated: 2/8 - Published: 9/7/2021 - Miranda L., OC, Team RWBY
The silver eyed agent by stefaniuss reviews
Even the smallest pebble can produce an avalanche, something that a out of his luck smuggler is about to find out. This is the story of Lena, silver eyed warrior of the latest generation forced to fight against an enemy far stronger than any yoma, but at the same time so familiar. Will she survive?
Crossover - Claymore & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 39 - Words: 277,952 - Reviews: 36 - Favs: 100 - Follows: 115 - Updated: 2/8 - Published: 1/4/2018 - [OC, Kelly C.] Mordin S., Shepard
Noble Effect by LoneSpartan52 reviews
Noble Six was alone after the death of Emile. The Pillar of Autumn had left Reach, leaving the lone Spartan behind. But what if instead of dying on Reach, fighting to his last breath, Six survived? What if he escaped Reach and headed for Earth, only to end up in another galaxy, in another war? Will he agree to fight the reapers alongside aliens? Find out in Noble Effect
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 15 - Words: 59,725 - Reviews: 120 - Favs: 296 - Follows: 405 - Updated: 2/6 - Published: 7/3/2020 - SPARTAN-B312/Noble Six, Garrus V., Shepard, Javik
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: 36 - Words: 649,123 - Reviews: 473 - Favs: 433 - Follows: 455 - Updated: 2/6 - Published: 9/13/2020 - Axel, Roxas, Xion, Shepard
A few Titans Solves Many Issues, Including the Reapers by vmoneywashere reviews
In a distant yet expansive corner of the galaxy, many races rose and fell without anyone noticing. Yet a collection survived their ordeals and now look outwards. They bring Ideals, Peace, Prosperity, all under the UNSA and its Custodianship. When the Quarian Migrant fleet encounters an Expedition fleet, the nomads find a new home and a new family. (more updates in the winters) HFY
Crossover - Mass Effect & Stellaris - Rated: T - English - Sci-Fi/Family - Chapters: 6 - Words: 26,165 - Reviews: 53 - Favs: 238 - Follows: 352 - Updated: 2/6 - Published: 11/16/2021 - [Tali'Zorah, Shepard] Rael'Zorah, 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: 12 - Words: 41,293 - Reviews: 50 - Favs: 108 - Follows: 161 - Updated: 2/5 - Published: 5/29/2021 - Tomb Kings, Warriors of Chaos
Exodus Into Fire by keita52 reviews
When the Battlestar Galactica, guided by Starbuck, makes the jump towards Earth, they find a planet encircled by giant black ships and a woman calling herself Commander Shepard telling them to leave before the Reapers attack them. With Earth not the safe haven they'd hoped for, the Colonial Fleet and their Cylon allies struggle to make a place for themselves in this new universe.
Crossover - Battlestar Galactica: 2003 & Mass Effect - Rated: M - English - Sci-Fi/Drama - Chapters: 17 - Words: 69,535 - Reviews: 112 - Favs: 280 - Follows: 425 - Updated: 2/3 - Published: 11/12/2014 - K. Thrace/Starbuck, Ashley W., Shepard
Mass Effect: Galaxy at war by palik reviews
A Citadel Exploration fleet filled with people the council didnt want around discovers something that will change the face of Citadel Space forever. The council will experience a crash course in the fight for survival
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 25 - Words: 77,117 - Reviews: 477 - Favs: 996 - Follows: 1,453 - Updated: 2/2 - Published: 6/18/2020
Raiders by Of Questionable Veracity reviews
Cerberus research labs look at all sorts of things. Some they probably shouldn't.
Crossover - Warhammer & Mass Effect - Rated: T - English - Chapters: 1 - Words: 6,899 - Reviews: 7 - Favs: 13 - Follows: 8 - Published: 2/2 - Complete
Mass Effect: Another Hero by UltimateBengeta
What do you get when you cross Mass Effect & Ben 10 together, stitch several other franchises to them Frankenstein style, harvest it for genetic material, grow it in a tube, & put it on the internet on a fanfiction site? You get this. As a return to form, I'm basically going all in with this one. Join Chase T. Callaghan as he becomes his Universe's last hope against the Reapers!
Crossover - X-overs & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 2 - Words: 6,363 - Favs: 6 - Follows: 9 - Updated: 2/1 - Published: 1/24 - Shepard, OC
Where Ghosts and Spectres play by spart1339 reviews
Spectres are feared throughout the galaxy as the right hand of the Council. But, there is another force that is feared more than the Spectres, even by Spectre operatives. They are known as Ghosts, elite covert operatives who are humanity's unseen protectors. Ghost Team Wolf is called in to assist Shepard.
Crossover - Mass Effect & Ghost Recon series - Rated: M - English - Sci-Fi/Adventure - Chapters: 6 - Words: 31,057 - Reviews: 21 - Favs: 190 - Follows: 266 - Updated: 1/31 - Published: 5/29/2017 - J. Garson, OC
Legend of Korra: Andromeda by James118 reviews
After 600 years of sleeping in dark space, the Ark Hyperion reaches the Andromeda galaxy but the crew discovers that they're lost. But luckily they find a planet near them and send the Pathfinder team to explore the planet they soon discover to be the world of the Avatar. OC x Korra and OC x Kya.
Crossover - Mass Effect & Legend of Korra - Rated: M - English - Adventure/Sci-Fi - Chapters: 4 - Words: 15,735 - Reviews: 5 - Favs: 23 - Follows: 27 - Updated: 1/31 - Published: 3/19/2021 - [OC, Korra]
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