Mass Effect Crossovers
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The Last Shinobi by derTraeumer reviews
The numbers of shinobi drastically decreased over the past generations till near extinction. People stopped using chakra as their source of power and focused on developing a modern society with the help of technology until they've achieved space-flight and the Reapers harvested their civilization... except one. Follow the ninja way of the last living shinobi Akane Uchiha.
Crossover - Naruto & Mass Effect - Rated: M - English - Tragedy/Mystery - Chapters: 36 - Words: 161,611 - Reviews: 50 - Favs: 146 - Follows: 193 - Updated: 7/6 - Published: 7/4/2019 - OC, 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: 13 - Words: 56,794 - Reviews: 127 - Favs: 425 - Follows: 624 - Updated: 7/5 - Published: 11/16/2021 - [Tali'Zorah, Shepard] Rael'Zorah, 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: 9 - Words: 20,527 - Reviews: 17 - Favs: 51 - Follows: 80 - Updated: 7/5 - Published: 12/6/2019 - J. Garson, Gandalf
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 (Reaper Incursion Arc)
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 28 - Words: 84,353 - Reviews: 515 - Favs: 1,100 - Follows: 1,569 - Updated: 7/5 - Published: 6/18/2020
The Halo Effect: War and Civilization by free man writer reviews
A crossover years in the works. Civilizations rise and fall but to those that do stand, they prosper. They Expand. They reach out across the stars. But of course, such is a Universal law, War is never far behind. War is a language all civilized races speak and it is war most are familiar with. Co-written with BulletStormX. Halo/Mass Effect with a dash of Star Wars.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 13 - Words: 127,353 - Reviews: 355 - Favs: 703 - Follows: 920 - Updated: 7/4 - Published: 7/28/2020
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: 9 - Words: 46,597 - Reviews: 23 - Favs: 71 - Follows: 124 - Updated: 7/4 - Published: 5/30/2021 - Courier, Shepard
Xen Effect by ThePilotArchangel reviews
Xen is the gateway between universes and dimensions. It is the place where time, space, physics, and other known rules that define ones life go out the metaphorical window. What will happen when a Child of Xen, a perfect Supersoldier, a Guardian of Humanity, and a Spectre of a Council of aliens find themselves caught up in a war of survival? Find out in "Xen Effect".
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 8 - Words: 73,718 - Reviews: 37 - Favs: 82 - Follows: 101 - Updated: 7/4 - Published: 4/30 - Master Chief/John-117, Cortana, Shepard, OC
HALO Mass convergence by SapphireDawn11709 reviews
Two Universe collide after the Forerunners fall and the Reapers return, will the two branches of Humanity placed in their respective Systems by a Forerunner Monitor unite or fall, only time will tell in this epic clash. When the UNSC Exploration and Research Vessel Light of Sol discover a strange artifact, they are opened up to the rest of the Galaxy after millennia of isolation.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 24 - Words: 82,670 - Reviews: 310 - Favs: 705 - Follows: 883 - Updated: 7/4 - Published: 9/18/2016 - Master Chief/John-117, Cortana, J. Garson, Tali'Zorah
I'll Always Find You by Scififan33 reviews
Sora T'Soni just wanted to keep her family safe, to put her skills to use for her people, so she joined the military. Riku Yamada was running from a past he wished he could forget, grateful to those who saved him, so he joined the Alliance military. The Saren and Sovereign attacked and both their lives changed forever. Something drew them together but how could it work?
Crossover - Kingdom Hearts & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 4 - Words: 23,146 - Reviews: 4 - Favs: 12 - Follows: 12 - Updated: 7/4 - Published: 6/30 - [Riku, Sora] [Liara T'Soni, Shepard]
Mass Effect - Convergence by Fallen2Pancake reviews
During a Batarian Slave Raid on the Systems Alliance Colony of Eden Prime unknown defenders both Human and of unknown alien origin aid in the defense. While the UNSC and XCOM join forces under a thought long dead UNSC Rear Admiral and navigate this new universe, how will the future of Mass Effect change and will it change for the better or worse. - Mass Effect - Halo - XCOM Cross.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 1 - Words: 11,385 - Reviews: 8 - Favs: 57 - Follows: 81 - Published: 7/2 - SPARTAN-B312/Noble Six, OC, Admiral Hackett, Shepard
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: 15 - Words: 121,998 - Reviews: 200 - Favs: 465 - Follows: 538 - Updated: 6/30 - Published: 7/10/2020 - Clark K./Kal-El/Superman, Miranda L.
The Long, Long Walk by This Is Sarcasm reviews
Crow is stuck, but it's not all bad news; he's been offered shelter on the Normandy, and Spider can't hurt them here. Shepard now has an unkillable paracausal warrior, and his 'not-an-AI', Glint, is a complete cinnamon roll, but it's not all good news; he's half-starved, in culture shock, and has a bad case of trust issues. He might need work, sure, but who on this ship doesn't?
Crossover - Mass Effect & Destiny - Rated: T - English - Sci-Fi/Angst - Chapters: 18 - Words: 59,259 - Reviews: 111 - Favs: 234 - Follows: 327 - Updated: 6/29 - Published: 9/15/2021 - Joker, Shepard, Dr. Chakwas, Crow
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: 32 - Words: 109,600 - Reviews: 41 - Favs: 226 - Follows: 229 - Updated: 6/28 - Published: 8/2/2019
Starwatch by CruxMDQ reviews
A youthful lieutenant Shepard unknowingly facilitates the release of an ancient evil and sets in motion a chain of events that will greatly influence the outcome of the first contact with Citadel species - and potentially threaten the standing of humanity among them. (Contributions: BrokenLifeCycle, kishinokurobi, kyro2009)
Crossover - Mass Effect & Overwatch - Rated: T - English - Adventure/Sci-Fi - Chapters: 65 - Words: 360,142 - Reviews: 170 - Favs: 303 - Follows: 360 - Updated: 6/28 - Published: 6/29/2016 - Shepard, Amélie L./Widowmaker, Lena O./Tracer, G. Reyes/Reaper
Galatic effect by Shadowking001 reviews
If Star Wars and Mass Effect came together with a lot of Syfy and magic and many others? The reapers will not suspect a thing. join us for a tale of strangeness and more in here
Crossover - Mass Effect & Star Wars - Rated: M - English - Adventure/Sci-Fi - Chapters: 2 - Words: 6,886 - Reviews: 7 - Favs: 12 - Follows: 11 - Updated: 6/28 - Published: 5/5/2021 - OC, OC
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: 10 - Words: 123,394 - Reviews: 63 - Favs: 292 - Follows: 338 - Updated: 6/27 - Published: 12/25/2019 - Naruto U., J. Garson, Garrus V., Tali'Zorah
Constant Effect by reinDank reviews
So this is why this primitives race hid when the night came.
Crossover - Mass Effect & Don't Starve - Rated: T - English - Horror/Supernatural - Chapters: 1 - Words: 371 - Reviews: 2 - Favs: 5 - Follows: 7 - Published: 6/27 - OC, Charlie - Complete
Just Another Day at the Office by Darthkvzn
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: 1 - Words: 3,070 - Favs: 9 - Follows: 6 - Published: 6/25 - EDI, Shepard
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: 29 - Words: 257,622 - Reviews: 237 - Favs: 573 - Follows: 674 - Updated: 6/24 - Published: 1/2/2019
The Normandy's Nomads by illFatedSuccess reviews
Mikoshi worked. V is no longer in danger of being overwritten but Johnny is still along for the ride. Months after single handedly assaulting Arasaka Tower, V is offered the job of a lifetime that could help set up his new family in the Aldecaldos forever. Without even thinking he takes it, bringing Panam along with him. Poor gonk had no idea what he was getting into.
Crossover - Mass Effect & Cyberpunk 2077 - Rated: M - English - Adventure/Sci-Fi - Chapters: 2 - Words: 13,023 - Reviews: 10 - Favs: 115 - Follows: 157 - Updated: 6/22 - Published: 5/26 - Garrus V., V, Panam P., Johnny Silverhand
DOOM Effect: V2 by Zrocker119 reviews
Alexander Carter didn't accomplish anything truly worth noting during his life. So when he was offered a chance to make a difference in the overgrowing universe he accepted without much argument on his part. Now armed with the skills and knowledge of one of the deadliest and most feared warrior in existence, The Doom Slayer, Alex will make sure that all will know his name.
Crossover - Doom & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 8 - Words: 45,535 - Reviews: 684 - Favs: 2,314 - Follows: 2,966 - Updated: 6/22 - Published: 3/25/2019 - Doomguy, Shepard
A War of Two Galaxies by JPfan0922 reviews
See what happens when the reapers invade the Star Wars Galaxy! Can Commander Shepard, the Normandy Crew, and the Systems Alliance help rid this new galaxy of the reapers? Can the Republic and Separatist Alliance put aside their many differences for the good of the galaxy? Find out in: A War of Two Galaxies! (Takes place right before Revenge of the Sith. Slightly altered time line)
Crossover - Star Wars & Mass Effect - Rated: T - English - Adventure/Sci-Fi - Chapters: 7 - Words: 13,194 - Reviews: 23 - Favs: 41 - Follows: 51 - Updated: 6/22 - Published: 4/4 - Anakin Skywalker, Obi-Wan K., Liara T'Soni, Shepard
Away from Home by reinDank reviews
We preserved. We survived the bombardment and the fallout. We adapted. But most importantly, we'll never forget. AU.
Crossover - Fallout & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 862 - Reviews: 8 - Favs: 10 - Follows: 15 - Published: 6/22 - OC, J. Garson, Joker - Complete
Larga vida al rey by TheLesserBeast333
¿Naves, alienígenas y planetas? Se supone que me había ido a dormir un par de horas y cuando me despierto me dicen que ha pasado 100,000 años. ¿Qué puede aportar un viejo mago a la era interestelar? ¿Caos? ¿Destrucción? ¿Revolucion? Aún no lo se, pero nunca le digo que no a una nueva aventura.
Crossover - Fairy Tail & Mass Effect - Rated: T - Spanish - Chapters: 1 - Words: 10,111 - Favs: 2 - Follows: 3 - Published: 6/21 - [Natsu D., Shepard] Miranda L.
The third way by Konradoziom reviews
Mankind has finally united after a long time. To do this, it was necessary to discover the ruins of an ancient civilization and a wrecked spaceship. But the ship and the ruins have a completely different technology. Is it a gift from heaven that allows for enormous development in many directions, or is it a danger of their existence? Humanity will have to find out about it.
Crossover - Starblazers & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 24 - Words: 72,215 - Reviews: 123 - Favs: 162 - Follows: 198 - Updated: 6/21 - Published: 2/20/2021 - Alex W./M. Kodai, A. Avatar/J. Okita, Nihlus K.
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