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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: 19 - Words: 99,522 - Reviews: 112 - Favs: 190 - Follows: 241 - Updated: 8/16 - Published: 4/26 - Liara T'Soni, Tali'Zorah, Miranda L., Shepard
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: 11 - Favs: 36 - Follows: 43 - 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: 10 - Favs: 23 - Follows: 24 - 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
Outlaws of the Verse: (CODEXes) by Coltkit Prods. Omniva Verse
An info dump of the Lore, for the "Main Universe" of my Omni-Verse
Crossover - Mass Effect & Halo - Rated: K - English - Fantasy/Sci-Fi - Chapters: 8 - Words: 18,690 - Published: 8/14
Outlaws of the Verse (ABANDONED, REWRITEs on Profile) by Coltkit Prods. Omniva Verse reviews
ABANDONED (Split this into multiple stories, but leaving this story up, unaltered. Please look on my profile, for the "Outlaws of the Verse" prequels, Codex, and main story)
Crossover - Mass Effect & Halo - Rated: T - English - Sci-Fi/Family - Chapters: 12 - Words: 83,109 - Reviews: 4 - Favs: 15 - Follows: 13 - Updated: 8/14 - Published: 10/21/2023 - OC, OC, Master Chief/John-117, Shepard - Complete
Mass Effect: EXT SIGMA by IceFoxie reviews
The UNSC Infinity and her fleet escape the Didact's final bid to stop humanity from claiming the Mantle. By using the EXT SIGMA protocol, the fleet finds itself in uncharted space. Humans don't exist in this Mass Effect. How will the natives react to the UNSC refugees?
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Drama - Chapters: 7 - Words: 25,892 - Reviews: 30 - Favs: 143 - Follows: 192 - Updated: 8/13 - Published: 7/28
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: 2 - Favs: 13 - Follows: 16 - Published: 8/13 - Harbinger, Shepard, Aloy, Erend/Erend Vanguardsman
Mass Effect: Spider and Wolf by Night Shadow76 reviews
The Spider-verse has been saved, the Inheritors had been defeated, and all is well. Well, except for one Spider. With his home gone and destroyed, he has no where to go, but with aid from Madam Web and The Other, he will have a new home, once that's on the edge of destruction. Now if only he could make sense of how Asari breeding works. Based loosely on the Inheritors storyline.
Crossover - Spider-Man & Mass Effect - Rated: M - English - Adventure - Chapters: 6 - Words: 34,794 - Reviews: 22 - Favs: 41 - Follows: 59 - Updated: 8/12 - Published: 6/12 - OC
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: 16 - Favs: 28 - Follows: 50 - 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: 68 - Favs: 632 - Follows: 839 - 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: 42 - Follows: 47 - Updated: 8/12 - Published: 3/13/2023
Mass Effect: Become Legend by Redgrave21 reviews
More than five years after the Reaper and Red Wars, Jane Shepard had lost her life for her galaxy, while Garrus Vakarian struggles to move on from the loss of the love of his life. But when Garrus begins to suffer strange dreams, the Normandy crew are thrust into a conflict that has lasted since the beginning of time. All while a strange voice tempts Garrus with… Salvation.
Crossover - Destiny & Mass Effect - Rated: M - English - Adventure/Romance - Chapters: 8 - Words: 41,104 - Reviews: 19 - Favs: 17 - Follows: 34 - Updated: 8/11 - Published: 7/7 - Garrus V., Shepard, Osiris, Cayde-6
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: 7 - Favs: 17 - Follows: 23 - 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.
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: 98 - Words: 427,275 - Reviews: 405 - Favs: 471 - Follows: 591 - Updated: 8/11 - Published: 8/7/2022
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: 74 - Follows: 90 - 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: 30 - Favs: 161 - Follows: 238 - 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: 31 - Follows: 40 - 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: 209 - Favs: 428 - Follows: 591 - 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: 2053 - Favs: 5,342 - Follows: 6,145 - 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: 42 - Follows: 51 - Updated: 8/6 - Published: 7/14 - Space Marines, Deathwatch, U. Wrex, Shepard
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