Mass Effect Crossovers
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Feared Reverence by ayab reviews
376 years after the battle between heaven and earth. Two humans have achieved godhood. Using their power to guide humanity to the stars. How will the galaxy react to see a species so advanced yet so primitive? So powerful yet not wanting to use their power. They are what the citadel race aspires to be and hates because of their jealousy.
Crossover - Naruto & Mass Effect - Rated: T - English - Fantasy/Sci-Fi - Chapters: 30 - Words: 119,202 - Reviews: 209 - Favs: 386 - Follows: 490 - Updated: 8/19 - Published: 1/14/2023
The Reclaimer Wars:The Reaper Crisis by Johnnieboy11 reviews
Six months prior to the worst crisis the normal Milky Way would face, Commander Shepard hunts the Collectors abducting human colonists in the Terminus Systems when she comes upon a terrifying new sight:Three Intergalactic fleets arrayed against each-other and her sole Frigate. Three new factions, one seeking a home and two seeking answers, all linked by the Star Roads.
Crossover - Game X-overs & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 20 - Words: 105,353 - Reviews: 117 - Favs: 206 - Follows: 260 - Updated: 8/18 - Published: 4/26 - Liara T'Soni, Tali'Zorah, Miranda L., Shepard
The Rook by Twisted Fate MK 2 reviews
On the way down to New Mombasa, Rookie falls into the Slipspace Rupture and ends up crashing down on Menae, high above Palaven, right in the midst of the Reaper War. From there, the war itself will shift and the fighting persists, but who knows what an ODST will add to the mix. (Redo of an older story)
Crossover - Halo & Mass Effect - Rated: M - English - Adventure - Chapters: 28 - Words: 100,769 - Reviews: 189 - Favs: 608 - Follows: 895 - Updated: 8/18 - Published: 7/8/2022 - Rookie, Shepard
XCOM: Enemy Expanded by DarthHollow reviews
We defeated the Elders. We took their technology and made it our own to advance into the stars. After so long we surprisingly made allies while unsurprisingly made enemies. Now we find our place and stand firm in this galaxy. Pray to those that believe us weak. For we will not.(Rewrites in progress!)
Crossover - X-Com & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 9 - Words: 41,424 - Reviews: 63 - Favs: 274 - Follows: 417 - Updated: 8/17 - Published: 8/6/2020
Fall of the Citadel (reboot) by Richard Scepton reviews
Many years have passed since our great victory. But as we rejoice in light of what the future has for us, we also equally weep, shed tears of sorrow, for the dearly departed who have fallen for this victory to be a reality. But what was our suffering to the innocent? What was our morals to the haughty? What was, our efforts, our sacrifices, to the complacent?
Crossover - Mass Effect & Kantai Collection - Rated: T - English - Sci-Fi/Adventure - Chapters: 5 - Words: 28,774 - Reviews: 12 - Favs: 37 - Follows: 44 - Updated: 8/16 - Published: 8/4 - Admiral Hackett, Shepard, OC, Fubuki
Quintessence Effect Collective Rebirth by EvaShinobiKaiserKnight reviews
Two Years have passed since the Paladins and the Normandy had suffered the tragedy of loss. A year since the Altean's have begun to return to the galaxy after the second battle of the Citadel. But the Reapers are not done as the Paladins and a revived John Shepard must gather allies to face this threat. This is their Rebirth into a new world of wonders as Heroes. NOW FORM VOLTRON!
Crossover - Mass Effect & Voltron: Legendary Defender - Rated: M - English - Sci-Fi/Family - Chapters: 3 - Words: 32,205 - Reviews: 11 - Favs: 23 - Follows: 25 - Updated: 8/15 - Published: 8/11 - [OC, Princess Allura]
Galaxia en Convergencia: El Acenso de Dax Cyband by ElNovelista501
Eh Jugado otra vez los juegos de Mass Effect y me eh encontrado con varias inconsistencias en mi historia, asi que comenzare a realizar una reescritura de la historia.
Crossover - Star Wars & Mass Effect - Rated: T - Spanish - Adventure/Sci-Fi - Chapters: 1 - Words: 5,898 - Favs: 3 - Follows: 7 - Updated: 8/14 - Published: 12/30/2023 - OC, Ashley W., Tali'Zorah, Shepard
Same Story, different World by KE12 reviews
After choosing Synthesis Shepard (F) awakes to find she is on Earth, just not her Earth, and with a parastic AI in her head. Aloy meanwhile questions just who she has found, and tries to figure out if this entity can be the answer to all her problems. Set during HZN Forbidden west.
Crossover - Mass Effect & Horizon Forbidden West - Rated: K - English - Adventure - Chapters: 1 - Words: 3,339 - Reviews: 6 - Favs: 20 - Follows: 29 - Published: 8/13 - Harbinger, Shepard, Aloy, Erend/Erend Vanguardsman
Halo Effect by kamilospl1312 reviews
What if UNSC replace System Allience from Mass Effect
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 1 - Words: 2,001 - Reviews: 19 - Favs: 35 - Follows: 64 - Published: 8/12
Sith Effect Episode II: The Skyllian Blitz by Metagray reviews
Having a seat on the council for almost two decades, the influence of the Sith has seeped into almost all aspects of Citadel space and has made them enemies within The Terminus Systems and Batarian Hegemony. John Shepard, Sith Apprentice, finds himself in this conflict with his loved ones at risk and only The Force to turn to in his darkest hour. Through Passion we gain Strength.
Crossover - Star Wars & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 2 - Words: 9,212 - Reviews: 70 - Favs: 653 - Follows: 874 - Updated: 8/12 - Published: 7/18 - D. Anderson, Admiral Hackett, Shepard, Hannah S.
Mass Wars Episode II by Fantasymaker76 reviews
Five Years have past since the destruction of the Normandy and the death of Commander Shepard. Now a new order is rising in the unmapped regions of the galaxy which is leaving unease in both the Republic and the Citadel. Determined to find out what is going on, a pro-human organisation has made plans to find out what this mysterious group wants.
Crossover - Mass Effect & Star Wars - Rated: M - English - Sci-Fi/Adventure - Chapters: 9 - Words: 44,317 - Reviews: 17 - Favs: 44 - Follows: 49 - Updated: 8/12 - Published: 3/13/2023
Mass Effect: A lone hunter by GojiraGodzillafan1 reviews
Mass Effect x Destiny 2 A single guardian will arrived to the mass effect space system, for he is needed to help out a certain future Spector and her crew deal with there problems. But not just that systems problems, a couple problems from the Guardians system as well. Disclaimer, I own nothing in this story except my guardian
Crossover - Destiny & Mass Effect - Rated: M - English - Adventure/Romance - Chapters: 3 - Words: 14,367 - Reviews: 8 - Favs: 20 - Follows: 26 - Updated: 8/11 - Published: 7/24 - OC, Tali'Zorah, U. Wrex, Ghost
The N7 and Avatar by EclipsePheniox reviews
Commander Shepard and Avatar Korra have switched places. No one knows how or why, but one thing is for sure it's not good. Both the crew of the Normandy and Team Avatar must team up to solve the problem they both face. Korrasami, Shep/ Miranda. Teen, for now, possibly M later.
Crossover - Mass Effect & Legend of Korra - Rated: T - English - Sci-Fi/Fantasy - Chapters: 7 - Words: 18,688 - Reviews: 1 - Favs: 10 - Follows: 21 - Updated: 8/11 - Published: 3/19 - Miranda L., Shepard, Korra, Asami S.
The Bureau of Multiverse Affairs by RedFrontWriter reviews
Recruited by the mysterious Lutece twins, a band of heroes are sent on a mission to hunt down the sinister Professor Moriarty as he attempts to become the greatest criminal in the multiverse.
Crossover - Doctor Who & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 26 - Words: 116,954 - Reviews: 1 - Favs: 7 - Follows: 11 - Updated: 8/11 - Published: 3/3 - 4th Doctor, Sarah Jane S., Garrus V., Tali'Zorah - Complete
Quintessence Effect the Rise of Lotor by EvaShinobiKaiserKnight reviews
A year has passed since the battle of the Citadel. Haggar has all but vanished and despite tragedy the Paladins continue to defend the Universe. But those from the ancient past have arrived seeking the aid of these new Paladins. A clue to her people is found. Now the Paladins must aid the mysterious Lotor to save not only the Alteans but construct a weapon to defeat the Reapers.
Crossover - Mass Effect & Voltron: Legendary Defender - Rated: M - English - Sci-Fi/Adventure - Chapters: 8 - Words: 70,795 - Reviews: 8 - Favs: 29 - Follows: 30 - Updated: 8/10 - Published: 8/2 - [Princess Allura, OC] Lotor - Complete
Frontlines: the Attican Front by vmoneywashere reviews
For over half a decade, the Citadel is losing a war against the race simply nicknamed the Friskies (Lankies). Their worlds slowly being lost, armies even numbers in the hundreds of thousands wiped off the map, and millions dead. But hope can be found. A signal detected off in the Attician Traverse. A recon force ventures out: To find a duel between Humanity and the Lankies.
Crossover - Misc. Books & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 5 - Words: 25,105 - Reviews: 31 - Favs: 167 - Follows: 245 - Updated: 8/10 - Published: 9/4/2023
Unknown Territory by giblo126 reviews
Earth was under siege by the Strogg, with no escape in sight. When the Turians find them, they're quick to jump in to the fray. But they just might open up a war none of them saw coming...
Crossover - Quake & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 4 - Words: 5,112 - Reviews: 22 - Favs: 33 - Follows: 42 - Updated: 8/8 - Published: 6/15
Galactic Conflicts: Tales of First Contact by TheDoctor1998 reviews
Humanity and its allies have stood strong after the Great War with the Covenant. Follow the Systems Alliance as it goes through a first contact nearly as disastrous as the one that lead to the Great War.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 9 - Words: 41,377 - Reviews: 210 - Favs: 441 - Follows: 611 - Updated: 8/7 - Published: 2/6/2023
Mass Cross Frontier by weebee reviews
The culmination of several terrible ideas. From an il-advised scientific expedition, to the Illusive man's shifting plans, to a couple of authors who should really know better. No, it's not what you think.
Crossover - Anime X-overs & Mass Effect - Rated: T - English - Humor/Adventure - Chapters: 6 - Words: 68,934 - Reviews: 25 - Favs: 60 - Follows: 78 - Updated: 8/7 - Published: 1/29/2021
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: 29 - Words: 246,813 - Reviews: 2058 - Favs: 5,357 - Follows: 6,160 - Updated: 8/6 - Published: 6/5/2013 - Saren A., Shepard, OC
Deathwatch: Embers (the Citadel incident) by Imperiumpilled30k reviews
999.m41 the brothers of Kill-Team Embers have been sent on what should have been a routine purging of Orkz in the Octurus sector, however something is a foot, a missing inquisitor and strange device make for a deadly pairing...with this encounter setting forth a much more dangerous chain of events... (please leave reviews)
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Fantasy - Chapters: 5 - Words: 29,403 - Reviews: 12 - Favs: 47 - Follows: 63 - Updated: 8/6 - Published: 7/14 - Space Marines, Deathwatch, U. Wrex, Shepard
The mark of the federation of independent species by migos501 reviews
(TESTING PHASE)“A single event can shape our lives or change the course of history.” United under a single banner, the federation stands as a testament that any species can thrive in harmony, gifted with technology that can tip the scale of an entire galaxy, they now face with a entirely new government and it’s sets of challenges(focusing on the mass effect story)
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 3 - Words: 82,248 - Reviews: 45 - Favs: 112 - Follows: 145 - Updated: 8/6 - Published: 10/6/2023 - Master Chief/John-117, Shepard
XCOM Terran Empire by emperorcaligula05 reviews
Sometime after the fall of the Elders at the hands of XCOM, a new government had formed from the combined efforts of the Reapers and the Templars, one that wished to see aliens not just exterminated from the face of the Earth but the eminent domain of human space. Will the might of the Citadel triumph over this new player or will the empires be swept forevermore into the dust bin?
Crossover - X-Com & Mass Effect - Rated: T - English - Sci-Fi/Angst - Chapters: 2 - Words: 8,003 - Reviews: 14 - Favs: 35 - Follows: 54 - Updated: 8/4 - Published: 8/1 - Liara T'Soni, Councilor Valern, Councilor Tevos, Councilor Sparatus
Buzzard Buccaneer Radio by General Rage reviews
Boz the Buzzard hosts this pirate radio station, beaming out music to the Normandy, Fallen Serpent, Crusty Chorka and Ascendant Justice non-stop. BBR has only one mission, to keep Rock n Roll alive in the dark void of outer space. A companion story to "Remnants" that shows what happens while Shepard is off playing hero. Part of the Wormhole Chronicles Saga.
Crossover - Halo & Mass Effect - Rated: M - English - Humor/Sci-Fi - Chapters: 12 - Words: 93,530 - Reviews: 102 - Favs: 108 - Follows: 120 - Updated: 8/4 - Published: 9/21/2016 - OC
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: 10 - Words: 112,899 - Reviews: 91 - Favs: 242 - Follows: 335 - Updated: 8/3 - Published: 3/7/2019 - Imperial Guard, OC, Shepard
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