Mass Effect Crossovers
Filters
3.5K | « Prev Page 1 2 3 4 5 12 .. Last Next »

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
Star Mahou effect by phantompain12 reviews
Tanya finally winds up in mass effect after having dealt with Being X. Starkiller's son too ends up in mass effect after his own sacrifice to stop the empire. This is something like that. I have no idea what I am going to write. Author note: Guys, I don't know what the hell I am doing. I just decided to write and this is the result. Any help would be appreciated as Eng is 2nd lang.
Crossover - Star Wars & Mass Effect - Rated: T - English - Humor/Adventure - Chapters: 20 - Words: 44,219 - Reviews: 39 - Favs: 76 - Follows: 92 - Updated: 8/10 - Published: 1/30
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: 165 - Follows: 243 - 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: 18 - Favs: 32 - Follows: 41 - 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: 437 - Follows: 607 - 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: 5,352 - Follows: 6,153 - 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: 45 - Follows: 56 - 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: 111 - Follows: 142 - 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: 51 - 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: 107 - Follows: 120 - Updated: 8/4 - Published: 9/21/2016 - OC
Operation ECLIPSE - Apocrypha and Sidestories by HelenTheMoon reviews
Omakes, sidestories and Apocrypha written by me and others for Operation ECLIPSE. The Sidestories are canon, the rest just for fun. Feel free to submit content yourselves! (I'll credit you, obviously)
Crossover - Sonic the Hedgehog & Mass Effect - Rated: T - English - Chapters: 26 - Words: 25,399 - Reviews: 39 - Favs: 29 - Follows: 24 - Updated: 8/4 - Published: 12/25/2023
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
Were it So Easy by Sigma0327 reviews
Six's life was a giant war. Every battle was a test of sheer tenacity and stubbornness against insurmountable odds. Every moment, every bullet fired, every Covenant, Insurrectionist, and Flood spore killed has led up to his last fight. Once again he was one of the few that stood between Earth and her enemies. This would be his final battle, and nothing could change that, right?
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 13 - Words: 171,604 - Reviews: 250 - Favs: 1,093 - Follows: 1,538 - Updated: 8/3 - Published: 11/9/2020 - SPARTAN-B312/Noble Six, Tali'Zorah, Miranda L., Shepard
Operation ECLIPSE by HelenTheMoon reviews
Pre-ME1 post-Frontiers Xover, in which the Sonic version of Earth replaces ME Earth. A Batarian planet suddenly turns invisible, and things only get weirder from there. That poor STG agent won't know what hit him, that's for sure. And neither will the rest of the galaxy - once Sonic and Eggman get there. Crossposted on Spacebattles and AO3. Rating may change.
Crossover - Sonic the Hedgehog & Mass Effect - Rated: T - English - Sci-Fi/Fantasy - Chapters: 11 - Words: 118,217 - Reviews: 63 - Favs: 84 - Follows: 109 - Updated: 8/3 - Published: 11/26/2023 - Sonic, Tails, OC
Remnants by General Rage reviews
From Halo's ashes, a mismatched Alliance is born. UNSC soldiers now serve alongside both Batarian deserters and shifty Jackal Space Pirates. Now Shepard and Master Chief have to keep these strange bedfellows from killing one another before they can stop an emergent new threat to the galaxy. The Next Swashbuckling Chapter of the Wormhole Chronicles.
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 45 - Words: 944,384 - Reviews: 876 - Favs: 559 - Follows: 636 - Updated: 8/1 - Published: 4/22/2016 - Master Chief/John-117, Cortana, Tali'Zorah, Shepard
The Effect of a Horse and a Dragon by Vimesenthusiast reviews
A different decision right after being cursed leads to a very different Ranma showing up in Nerima. When he goes after Herb to beat some sense into him Ryoga takes the chance to get rid of his rival once and for all, sending both combatants to the Mass Effect universe. What changes will two martial artists and their use of ki have on the coming conflict? RanmaXTaliXKasumiXSama
Crossover - Ranma & Mass Effect - Rated: M - English - Humor/Adventure - Chapters: 10 - Words: 206,310 - Reviews: 648 - Favs: 2,336 - Follows: 2,419 - Updated: 7/31 - Published: 2/2/2014 - Ranma, Kasumi G., Tali'Zorah, Samara
Quintessence Effect by EvaShinobiKaiserKnight reviews
From Cycles of long ago from uncharted regions of the universe comes a legend, the legend of Voltron the Legendary Defender of the Universe. A mighty robot loved by good feared by evil. As the cycles repeat the return of a great threat awoken a slumbering princess of a lost people would gather five new Paladins so they may bring back Voltron the Legendary Defender of the Universe.
Crossover - Mass Effect & Voltron: Legendary Defender - Rated: M - English - Sci-Fi/Fantasy - Chapters: 14 - Words: 141,475 - Reviews: 31 - Favs: 49 - Follows: 48 - Updated: 7/31 - Published: 7/14 - [Princess Allura, OC] [Shepard, Ashley W.] - Complete
Guardian of Humanity by DarkRock reviews
This is a possible future of "The Gods Bleed" story.
Crossover - Naruto & Mass Effect - Rated: M - English - Adventure/Mystery - Chapters: 2 - Words: 2,784 - Reviews: 3 - Favs: 19 - Follows: 25 - Updated: 7/29 - Published: 6/15 - Naruto U.
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: 90 - Words: 354,651 - Reviews: 868 - Favs: 870 - Follows: 1,143 - Updated: 7/28 - Published: 5/5/2019 - Legion, Pyrrha N., Penny P., God of Darkness - Complete
Eezo-Flux Theory by BrozTheBro reviews
Humanity found out that it was not alone in the galaxy. It had earned its place in the galactic community, and made it its goal to strive for unity and prosperity. But the barrier between galaxies is fickle, and another galaxy's mankind may yet make a significant difference in the galaxy's period of peace. The Council will stare down the wonders and horrors of the Collapse.
Crossover - Mass Effect & Starsector - Rated: M - English - Sci-Fi/Adventure - Chapters: 13 - Words: 63,377 - Reviews: 53 - Favs: 120 - Follows: 160 - Updated: 7/27 - Published: 3/11 - Garrus V., Liara T'Soni, Admiral Hackett, C. Pressley
The Reclamation by Fade Maybe reviews
Through ONI's manipulation, the UNSC stumbles upon a Mass Relay and is dragged into a new war. They'll discover the battered races of the Citadel, the political intrigue of its factions, and a second group of humans governed by the Systems Alliance, divided by Cerberus, and lead by Commander Shepard. Yet no one can stop what is to come: the Reclamation, and the death of the galaxy.
Crossover - Halo & Mass Effect - Rated: T - English - Drama/Suspense - Chapters: 54 - Words: 407,208 - Reviews: 1699 - Favs: 1,895 - Follows: 2,325 - Updated: 7/25 - Published: 3/13/2013
Canadian Blue: Off the Leash by brooklynrhyno reviews
With one final test in her way to N7, Commander Jane Shepard learns a valuable lesson from the Final Instructor at the ICT. As well she should. After all, he is "the best there is at what he does".
Crossover - X-Men & Mass Effect - Rated: K - English - Drama/Sci-Fi - Chapters: 1 - Words: 5,487 - Reviews: 1 - Favs: 11 - Follows: 11 - Published: 7/25 - James H./Wolverine/Logan, Shepard - Complete
3.5K | « Prev Page 1 2 3 4 5 12 .. Last Next »