Mass Effect Crossovers
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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: 41 - Words: 308,060 - Reviews: 36 - Favs: 198 - Follows: 252 - Updated: 1/11 - Published: 1/5/2022 - Lone Wanderer, Courier, OC
A Second Chance by Creeperbreak reviews
After the golden throne fails, the emperor decides to pull one last card. Using the immeasurable amount of power he accumulated, he moves an 20th century era Earth into the galaxy of mass effect.
Crossover - Warhammer & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 2 - Words: 2,780 - Reviews: 26 - Favs: 71 - Follows: 123 - Published: 1/10 - The Emperor
Human Legacy by ShirouKuroEmiya reviews
Some fifty thousand years, there once was a galaxy-spanning civilisation belonging to a race called humanity. They earned many names such as Protector and Giver. Many later races would worship them as gods. Humanity fought a war with the life-destroying Reapers. Now, thousands of years later the younger races have stepped into the stars to find the ruins of humanity...
Crossover - Fate/stay night & Mass Effect - Rated: T - English - Chapters: 2 - Words: 4,159 - Reviews: 19 - Favs: 93 - Follows: 122 - Updated: 1/9 - Published: 12/5/2022 - Shepard
Just Another Day at the Office by Darthkvzn reviews
Spectre-turned-bounty hunter (and unwilling interdimensional traveler) Jane Shepard arrives at her base of operations on Knowhere to embark on a mission to this dimension's version of Earth - one that could help her find her way back to the universe she was ripped from... (F!Shepard, multicrossover, part of the Kryptonverse series!)
Crossover - Ben 10 & Mass Effect - Rated: T - English - Adventure - Chapters: 4 - Words: 13,007 - Reviews: 2 - Favs: 17 - Follows: 16 - Updated: 1/9 - Published: 6/25/2022 - EDI, Shepard
Stellar Effect Codex by Brandon Storm reviews
A Codex exploring the History and Lore of the Stellar Effect Universe
Crossover - Mass Effect & Stellaris - Rated: T - English - Sci-Fi - Chapters: 9 - Words: 19,850 - Reviews: 16 - Favs: 31 - Follows: 26 - Updated: 1/8 - Published: 8/7/2022
Those Who Favor Fire by The.A.I.1502 reviews
In a universe reeling from the Blip, Isabelle Collins is shattered by her brother's death. But humanity's intent on colonizing the stars reveals an undeniable truth - Thanos was the harbinger of something much worse. Isabelle must peel back the layers of her new reality, because this time, the stakes are much higher than half of all life.
Crossover - Marvel & Mass Effect - Rated: M - English - Sci-Fi/Fantasy - Chapters: 25 - Words: 223,027 - Reviews: 18 - Favs: 52 - Follows: 68 - Updated: 1/7 - Published: 6/1/2020 - OC, P. Coulson, Harbinger, Shepard
United Earths Empire: The Beginning of a New Age by Destarien reviews
What if three Universes once separate come together. three different humanities with three different paths of technology merge into one galaxy. Citadel space will never be the same because the Schahl Empire and UNSC are here. Two Civilizations, one at war and one ready for war.
Crossover - Halo & Mass Effect - Rated: T - English - Fantasy/Sci-Fi - Chapters: 8 - Words: 21,362 - Reviews: 70 - Favs: 201 - Follows: 268 - Updated: 1/5 - Published: 5/29/2022 - J. Keyes, J. Cutter, SPARTAN-B312/Noble Six, Jerome-092
United Earths Empire Rewrite by Destarien reviews
What if three Universes once separate come together? three different humanities with three different paths of technology merge into one galaxy. Citadel space will never be the same because the Schahl Empire and UNSC are here. Two Civilizations, one at war and one ready for war.
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Fantasy - Chapters: 1 - Words: 8,225 - Reviews: 6 - Favs: 80 - Follows: 95 - Published: 1/5
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: 3 - Words: 14,685 - Reviews: 18 - Favs: 83 - Follows: 125 - Updated: 1/5 - Published: 10/16/2022 - 2B, 9S, YoRHa Commander
My Mass Effect Acadamia by Astraea755
A crossover bringing all the characters you know and love from my hero acadamia and putting them into the roles of several mass effect characters. We follow Izuku Midoriya as he awakens again from yet another death at the hands of the reapers. This time he swears it will be different. This will be updated periodically, i write out the chapters after recording gameplay to use.
Crossover - My Hero Academia/僕のヒーローアカデミア & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 1 - Words: 3,156 - Favs: 1 - Follows: 5 - Published: 1/4 - Izuku M., Mina A., Ochako U., Tenya I.
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: 7 - Words: 46,890 - Reviews: 148 - Favs: 503 - Follows: 660 - Updated: 1/3 - Published: 12/3/2022 - D. Anderson, Admiral Hackett, Rael'Zorah, OC
Mass Effect: Into Darkness by Lara Jayd reviews
When Revan is thrown into Citadel space by a phenomenon she has never encountered before, she must join Shepard in her fight against the Reapers in order to save both of their galaxies.
Crossover - Star Wars & Mass Effect - Rated: M - English - Adventure/Romance - Chapters: 17 - Words: 71,194 - Reviews: 51 - Favs: 198 - Follows: 296 - Updated: 1/3 - Published: 6/14/2020 - Revan, Carth O., Garrus V., Shepard
Kerberos by timedraven117 reviews
Commissioned: The Green Flu struck earth like a meteor, in its clutches billions died, and a new world emerged. Now it is the year 2156 and that which has been dreaded by humanity ever since the truth of the Green Flu has come to pass. First Contact.
Crossover - Mass Effect & Left 4 Dead - Rated: M - English - Sci-Fi - Chapters: 6 - Words: 33,764 - Reviews: 18 - Favs: 118 - Follows: 179 - Updated: 1/3 - Published: 4/23/2021 - Illusive Man, Shepard
A Metal Guardian by JawsOnYou67 reviews
The Universal Century, only a few short years ago humanity nearly eradicated itself to the tune of a madman, now it spreads, free of most of its old hatred. Yet the galaxy won't let them rest. Terminal prepares the twin Queens as best it can. (Gundam x Mass Effect)
Crossover - Gundam UC & Mass Effect - Rated: T - English - Sci-Fi/Humor - Chapters: 19 - Words: 97,089 - Reviews: 118 - Favs: 316 - Follows: 387 - Updated: 1/2 - Published: 8/18/2020 - Amuro R., Char A., Tali'Zorah, Admiral Hackett
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: 15 - Words: 79,719 - Reviews: 93 - Favs: 180 - Follows: 265 - Updated: 1/2 - Published: 2/21/2022
Mass Effect Kills Halo by giblo126 reviews
I was frustrated and wanted to get something out.
Crossover - Halo & Mass Effect - Rated: K+ - English - Chapters: 1 - Words: 495 - Reviews: 21 - Favs: 1 - Follows: 2 - Published: 1/1
The Final Olympian by TheSilverboar reviews
Percy Jackson. Alive since before humanity even reached Mars, wandering in solitude. But as Saren tries to destroy the galaxy he can't stand Idly by and returns to Alliance Space to help stop this new threat to his species. (Male Sheppard)
Crossover - Percy Jackson and the Olympians & Mass Effect - Rated: M - English - Sci-Fi/Friendship - Chapters: 5 - Words: 8,202 - Reviews: 39 - Favs: 560 - Follows: 670 - Updated: 12/31/2022 - Published: 11/6/2021 - Percy J., Ashley W., Tali'Zorah, Shepard
Mass Effect: Man of Steel by DarkAvenger001 reviews
What if the explosion of Krypton wasn't natural? What if Kal-El's escape pod didn't go to Earth? This is that story.
Crossover - Superman & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 20 - Words: 70,226 - Reviews: 187 - Favs: 340 - Follows: 400 - Updated: 12/30/2022 - Published: 6/2/2013
Depths of Space by Lighting wolf knight
A Jedi Relic takes The fledging New Republic and a student of Luke's to new depths of space. One with new friends and enemies. Rated T for violence, death, and profanity.
Crossover - Star Wars & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 2 - Words: 8,381 - Favs: 3 - Follows: 6 - Updated: 12/30/2022 - Published: 12/11/2022 - OC, Grand Moff A. Kaine, Liara T'Soni, Peebee S.
star wars the old republic naruto story by dragons 23 reviews
naruto was left on the steps of the jedi temple and is found by grand master and is the adopted by jedi knight satele shan and become a jedi padawan to master kassandra romance be lana beniko and jaesa and all so my oc kara lockwood
Crossover - Mass Effect & Star Wars - Rated: M - English - Sci-Fi/Romance - Chapters: 5 - Words: 6,144 - Reviews: 1 - Favs: 2 - Follows: 3 - Updated: 12/29/2022 - Published: 10/16/2022 - HK-47, Nadia G., Lana Beniko, BD-1
Not in one's own plate by Sicht reviews
V was losing hope of returning to her life as she knew it. Time had become an unknown constant; had she been inside for a year? Maybe two? Either way, she felt anxious, worried. Her sacrifices couldn't have been all for naught. Right?
Crossover - Mass Effect & Cyberpunk 2077 - Rated: M - English - Mystery/Sci-Fi - Chapters: 3 - Words: 12,901 - Reviews: 9 - Favs: 47 - Follows: 85 - Updated: 12/28/2022 - Published: 9/8/2022 - V, OC
The Exiles:A New Power by Johnnieboy11 reviews
The beginning of the Battle For Earth signaled the start of the final, bloodiest campaign of the Human-Covenant War. Hastily, a plan is put into motion and an Ark Fleet, composed of a dozen Phoenix-class vessels and their escorts, makes the jump out of system. Either interference, or malfunction, causes their arrival to a new Galaxy, where new threats lurk just around the corner.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 6 - Words: 22,115 - Reviews: 130 - Favs: 500 - Follows: 768 - Updated: 12/28/2022 - Published: 12/26/2021 - OC, Tali'Zorah, Admiral Hackett, Rael'Zorah
Humanity Perpetuum by Slim Dustpan reviews
My earliest and most embarrasing published work, its not very good but by goddam will I not let it hold me back. It lives again! I shall do my very best to slavage this work! Or it may die again, who knows.
Crossover - Command & Conquer & Mass Effect - Rated: T - English - Sci-Fi/Humor - Chapters: 4 - Words: 4,324 - Reviews: 11 - Favs: 27 - Follows: 37 - Updated: 12/28/2022 - Published: 4/17/2018
Snack Bytes: Is There a Dream Effect by Wynnt'r reviews
They say a machine cannot dream, cannot feel, but what if. What if, there was someone that can make more than just AI. And there's only one person can bring a dream for synthetics, and that's her!
Crossover - Kamen Rider & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 2,548 - Reviews: 4 - Favs: 6 - Follows: 4 - Published: 12/27/2022 - Shepard - Complete
Mass effect Fallout by norwi
A fan project of mine merging mass effect and Fallout (Plus ocs) into one universe
Crossover - Fallout & Mass Effect - Rated: T - English - Sci-Fi/Fantasy - Chapters: 2 - Words: 3,035 - Favs: 6 - Follows: 7 - Published: 12/26/2022 - Tali'Zorah, Benezia, OC
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