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Alliance: Zeroes (The AI Generated Disasterpiece) by JSToast
The Zeroes program was created after the fracture in reality that Commander Shepard had caused. This fracture gave many ordinary citizens powers not of that world, to be known from then on as "Awoken." Many feared them, but Shepard sought to end their misery. For this, she created the Zeroes program, where those who wanted to, could prove themselves. Irin was one of them.
Crossover - Fallout & Mass Effect - Rated: M - English - Adventure/Humor - Chapters: 1 - Words: 2,400 - Published: 5h
Salvation (ENG) by Z0n3theDaMn3d reviews
The knowledge of sin is the beginning of salvation. More than 40 years after the end of the war against the Covenant, a new storm is brewing on the edge of the human empire. Will the colonies of the Linwood Sector be able to withstand this new threat or will they burn like Harvest once did?
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 9 - Words: 80,355 - Reviews: 113 - Favs: 313 - Follows: 473 - Updated: 11h - Published: 10/8/2020 - T. Hood, Shepard, Councilor Tevos, Benezia
Stellar Effect by Brandon Storm reviews
The Reapers trap was perfect in its design. Their execution refined over billions of years, their technology refined since the dawn of time itself. Right up until Someone Broke the Trap!
Crossover - Mass Effect & Stellaris - Rated: T - English - Adventure/Sci-Fi - Chapters: 30 - Words: 133,415 - Reviews: 161 - Favs: 248 - Follows: 351 - Updated: 14h - Published: 8/7/2022
NieR: Ghosts of a bygone Era by The meme lord of the east reviews
After the fall of the Tower, androids are finally united and ready to explore space in search of friendly species, what they found was a galactic community of aliens with deeply rooted hatred for AI. Will the galactic community make an exception for the Androids? or will they indulge in petty wars while another threat looms on the horizon? Citadel vs Reapers vs Humans.
Crossover - Mass Effect & Nier - Rated: T - English - Sci-Fi/Supernatural - Chapters: 4 - Words: 21,629 - Reviews: 23 - Favs: 91 - Follows: 138 - Updated: 15h - Published: 10/16/2022 - 2B, 9S, YoRHa Commander
A Galaxy of Inheritors and Usurpers by HaloZealotDemon reviews
The Separatists destroy the Covenant in a brutal war, yet in the 2570s they persist in their efforts, but in two years they will be gone. However The Gods have other plans. The Migrant fleet decides that to escape through Relay 314 to unknown space, but meet, as LTCOL Church said "Sleep-deprived Titans with negative zero fucks to give." Heavy AU, Rvb elements, swearing.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Drama - Chapters: 2 - Words: 17,002 - Reviews: 30 - Favs: 152 - Follows: 199 - Updated: 2/25 - Published: 12/25/2022 - Arbiter, T. Hood, Tali'Zorah, Councilor Sparatus
The Wayfarer by Umbral Choir reviews
In the twilight of the universe, the Ihan-rii, a forgotten sect of Protoss travel to another reality to escape the hounds of the void. Xiltar, the last member of the umbral choir will guide his people into this world, only to find that he traded one war of annihilation for another.
Crossover - StarCraft & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 15 - Words: 28,026 - Reviews: 17 - Favs: 35 - Follows: 49 - Updated: 2/25 - Published: 2/5
Destiny Lost by Twisted Fate MK 2 reviews
The Gods left remnant together, with the statement they would never return to it or influence it. Only, that wasn't true, was it? The God of light, ever the hypocrite and liar, didn't abandon Remnant. Instead, he reincarnated someone to do his bidding and bring Remnant to them. Cue, the now dead Pyrrha Nikos and the God of Darkness' ideas. / Supporter Requested by Espacole & Spork
Crossover - Mass Effect & RWBY - Rated: M - English - Adventure - Chapters: 63 - Words: 262,755 - Reviews: 692 - Favs: 716 - Follows: 992 - Updated: 2/25 - Published: 5/5/2019 - Legion, Pyrrha N., Penny P., God of Darkness
Mass Effect: Resurrection by RabidRabbids reviews
Shepard's life hadn't gotten any easier. Entire colonies were disappearing, millions of people gone. And that's not even mentioning she'd been dead for two years, but desperate times call for desperate measures, and Shepard is forced to work with Cerberus to find out what's behind the disappearances. Thankfully, she's got monsters backing her up. (Sequel to Monstrum Immortalem)
Crossover - Mass Effect & Guardians of the Galaxy - Rated: M - English - Sci-Fi/Adventure - Chapters: 22 - Words: 102,188 - Reviews: 4 - Favs: 17 - Follows: 20 - Updated: 2/24 - Published: 6/15/2021
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: 27 - Words: 327,859 - Reviews: 611 - Favs: 461 - Follows: 580 - Updated: 2/24 - Published: 4/22/2022 - Imperial Guard, Space Marines, Adeptus Mechanicus, Shepard
A Knight of the Stars by TheBlindOrchid reviews
After barely escaping Order 66 with her life, Jedi Knight Kyra Katobi finds herself thrust into another grand calling, and another war. Perhaps this time, she can prevent the ones she cares about from dying. Takes place during Mass Effect 2/Post ROTS. Shepard x OC Mirialan Jedi. Reboot of my story A Knight's Redemption.
Crossover - Star Wars & Mass Effect - Rated: M - English - Sci-Fi/Romance - Chapters: 2 - Words: 5,128 - Reviews: 3 - Favs: 15 - Follows: 21 - Updated: 2/22 - Published: 2/20 - OC, Shepard
On the Illusion of Might by evevee reviews
We thought ourselves powerful, able to conquer a galaxy with nothing but toys. When we overcame every challenge, breached the space between the galaxies themselves, what use were the words of a race ashamed of their own past? Yet we cannot deny that we were warned, for while a challenge to a human is laughable, a challenge to humanity is a death sentence.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 27 - Words: 297,181 - Reviews: 2051 - Favs: 3,731 - Follows: 4,709 - Updated: 2/21 - Published: 2/21/2017 - Master Chief/John-117, Cortana, Garrus V., Shepard
Rise of the Federation Alliance: Federation-Citadel War by SimplyLaggy reviews
( AU) A Citadel Council patrol fleet stumbles upon a Starfleet exploratory fleet who just discovered a mass relay, and fires on it, sparking a war on levels beyond the Citadel's imaginations! Meanwhile, Reapers detect these newcomers, and with their superiority complex, attack early! Meanwhile, Q sits on a beach chair munching popcorn, watching, and laughing!
Crossover - StarTrek: The Next Generation & Mass Effect - Rated: T - English - Chapters: 1 - Words: 2,497 - Reviews: 9 - Favs: 46 - Follows: 68 - Published: 2/21 - J. Picard, Admiral Hackett, Shepard
A Tale of Two Engineers: Redux by Inkytan reviews
A romantic action story involving Isaac Clarke (romanced with Tali'Zorah) After Isaac becomes somehow thrown into the universe of Mass Effect, he joins up Shepard's crew, experiencing crazy adventures and emotional moments with his new family and newfound love. Just, give it a read, you might like it. - This is an old high school fanfiction I'm rewriting. It's been 8 years lol
Crossover - Mass Effect & Dead Space - Rated: M - English - Romance/Sci-Fi - Chapters: 2 - Words: 20,688 - Reviews: 35 - Favs: 149 - Follows: 185 - Updated: 2/21 - Published: 8/22/2015
SAGE EFFECT by The Guarding Dark reviews
Dying at the tender age of nineteen sucked. Being reborn In a doomed future. With a Pair of Rinnegan eyes, and an apocalypse bearing down on me. Sucked even more. And being born on Mindoir certainly didn't help matters. (Rated M for extreme blood and gore as of chapter ten, read at your own risk. Possible OCXFemshep.)
Crossover - Naruto & Mass Effect - Rated: M - English - Adventure/Drama - Chapters: 19 - Words: 71,783 - Reviews: 433 - Favs: 1,102 - Follows: 1,426 - Updated: 2/21 - Published: 9/8/2014
The Sins of our Fathers by MarkerMagnum reviews
Unknown to the Citadel Council, the Human-Covenant war nears its vicious end. Miranda Keyes is seconds too slow. Delta Halo fires, leaving UNSC space as a lifeless snapshot in time. The Citadel must morn the loss of a civilization they never knew. Crossposted by myself, Jabber the very wocky on Ao3.
Crossover - Halo & Mass Effect - Rated: T - English - Drama/Sci-Fi - Chapters: 3 - Words: 18,827 - Reviews: 88 - Favs: 267 - Follows: 390 - Updated: 2/20 - Published: 2/11 - Master Chief/John-117, Miranda K., Cortana
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: 4 - Words: 29,129 - Reviews: 8 - Favs: 29 - Follows: 31 - Updated: 2/20 - Published: 10/29/2021 - Bruce W./Batman, Garrus V., Liara T'Soni, Tali'Zorah
Sith Effect Episode I: First Contact by Metagray reviews
The ruins of Mars belonged not to the protheans but to humanity's ancestors, the Sith Empire. How will the Citadel react to a race that not only doesn't use mass effect technology, but is an anathema to their ideals. When the turians find the Sith, they face a war unlike any this galaxy has seen. The First Contact War has begun. Peace is a lie, there is only passion.
Crossover - Star Wars & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 11 - Words: 79,162 - Reviews: 310 - Favs: 812 - Follows: 1,075 - Updated: 2/20 - Published: 12/3/2022 - D. Anderson, Admiral Hackett, Rael'Zorah, OC
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: 22 - Words: 190,792 - Reviews: 264 - Favs: 596 - Follows: 700 - Updated: 2/20 - Published: 7/10/2020 - Clark K./Kal-El/Superman, Miranda L.
Never Fade Away by Ideas-Guy reviews
Lives are cheap and money is everything. That's how the orphanage made its money - lending out children for human expirementation. L is an old man at the age of fifteen and he knows he doesn't have much time left. All that mattered was getting out, but he soon learns that the world is a lot bigger than Night City. And that the galaxy is a lot bigger than Earth.
Crossover - Mass Effect & Cyberpunk 2077 - Rated: M - English - Adventure/Drama - Chapters: 14 - Words: 74,694 - Reviews: 103 - Favs: 469 - Follows: 551 - Updated: 2/20 - Published: 10/31/2022 - Shepard, V
Space Effect by Foyden reviews
In an attempt to escape from the blood moons, Isaac and Carver launch a ship on a superluminal journey. At this time, Normandy explores one of the systems and discovers an unknown spacecraft.
Crossover - Mass Effect & Dead Space - Rated: M - English - Sci-Fi/Adventure - Chapters: 5 - Words: 15,854 - Reviews: 6 - Favs: 47 - Follows: 66 - Updated: 2/19 - Published: 2/16 - Shepard, Isaac C., J. Carver
Blue Animagus by Baron Zed reviews
Omake for Tellur's Blue Magic. Harry has some directed accidental magic. Hermione researches how to get what she wants.
Crossover - Harry Potter & Mass Effect - Rated: T - English - Sci-Fi/Fantasy - Chapters: 3 - Words: 11,076 - Reviews: 3 - Favs: 43 - Follows: 58 - Updated: 2/19 - Published: 2/15 - [Harry P., Hermione G.] Liara T'Soni - Complete
What Lies Beneath by Mandalorian Runescaper reviews
After Commander Shepard refuses her help on the Citadel, Tali is left having to find another way to complete her Pilgrimage. But there are other things in the galaxy just as terrifying as the Reapers. Mass Effect/Alien crossover, but with much more of a focus on the former. Takes place during ME1. Feedback is much appreciated!
Crossover - Aliens/Predator & Mass Effect - Rated: T - English - Sci-Fi/Horror - Chapters: 2 - Words: 12,809 - Reviews: 3 - Favs: 13 - Follows: 12 - Updated: 2/19 - Published: 12/17/2022 - Tali'Zorah, OC
Wasteland Galaxy by Redentor reviews
Matriarch Lantaya is a brave explorer from the Golden Age of Asari space exploration, and she wants to go home. The Lone Wanderer is a messianic cyborg from a world scorched in nuclear fire, and he wants to save the wastelands. Courier Six is a tribal postman who usurped control of an entire city state. He wants to eat people. Among other things. (Also available on Spacebattles)
Crossover - Fallout & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 42 - Words: 312,052 - Reviews: 40 - Favs: 207 - Follows: 262 - Updated: 2/19 - Published: 1/5/2022 - Lone Wanderer, Courier, OC
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: 18 - Words: 276,512 - Reviews: 282 - Favs: 545 - Follows: 680 - Updated: 2/18 - Published: 12/28/2020 - OC, U. Wrex, Shepard, Councilor Tevos
To Sail Among the Stars by How-not-to-do-something reviews
The Universal Century promised a new Era, and brought conflict. But the stars shine on, awaiting those who seek a new start. Crossposted from Ao3.
Crossover - Gundam UC & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 9 - Words: 47,012 - Reviews: 19 - Favs: 54 - Follows: 74 - Updated: 2/18 - Published: 11/1/2022
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