Mass Effect Crossovers
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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: 51 - Words: 168,710 - Reviews: 71 - Favs: 324 - Follows: 343 - Updated: 3/21 - Published: 8/2/2019
Mario Effect by OroDeus reviews
Haunted by visions of impending doom, Mario summons his ragtag team of explorers to adventure. Their journey across the stars will uncover the koopa king's horrible plot to take over the galaxy.
Crossover - Mario & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 33 - Words: 38,777 - Reviews: 15 - Favs: 4 - Follows: 7 - Updated: 3/20 - Published: 12/27/2023 - Mario, Luigi, Daisy, Toad
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. NOW ON TV TROPES!
Crossover - Sonic the Hedgehog & Mass Effect - Rated: T - English - Sci-Fi/Fantasy - Chapters: 14 - Words: 157,611 - Reviews: 88 - Favs: 126 - Follows: 153 - Updated: 3/20 - Published: 11/26/2023 - Sonic, Tails, OC
Mobile Suit - Mass Effect: The First Contact War by Mister Smallville reviews
Two worlds collide, neither prepared for the other. The Solar Sphere Congress -successor to the long gone Earth Federation- unwittingly starts a galactic crisis when it makes first contact with a very angry, very trigger happy Turian Hierarchy.
Crossover - Gundam UC & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 30 - Words: 197,721 - Reviews: 361 - Favs: 517 - Follows: 697 - Updated: 3/20 - Published: 8/7/2023
Mass Effect: Legend of Vader by Gaming Lichdom reviews
Darth Vader attempts to resurrect his deceased wife through an ancient ritual, but is pulled into the machine and transported to an unknown planet. On his quest to return home, he comes across a Quarian woman named Tali'Zorah, who just so happens to have information about a rogue Spectre Named Saren. The two form a strange duo as they venture on a quest to save the galaxy.
Crossover - Star Wars & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 4 - Words: 18,031 - Reviews: 42 - Favs: 166 - Follows: 254 - Updated: 3/19 - Published: 10/30/2024 - [Darth Vader, Tali'Zorah] Garrus V., Shepard
Estrella y Masa se Conocen by dark platinum reviews
Anthon fankhauser y John Shepard son dos individuos reconocidos por sus respectivos gobiernos como héroes de renombre, la única diferencia es la escala en la que operan, uno a salvado a un sector entero mientras que el otro a salvado a una galaxia entera, que ocurrirá cuando el primero se encuentre con el segundo.
Crossover - Mass Effect & Starfield - Rated: M - Spanish - Adventure/Sci-Fi - Chapters: 4 - Words: 42,849 - Reviews: 4 - Favs: 8 - Follows: 10 - Updated: 3/18 - Published: 5/24/2024 - Miranda L., Shepard, Sarah Morgan, OC
Mass Effect: ODST Lost by Fantasy Theatre reviews
ODST Captain Nathanial Renkov unintentionally becomes the first Helljumper to survive being dropped through a Slipspace anomaly. The problem? He has no idea where is and is surrounded by aliens the UNSC has no record of. Even worse? No one knows what the UNSC is. Follow his story as he tries to make sense of his new surroundings while trying to survive a new galactic threat.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 6 - Words: 19,811 - Reviews: 26 - Favs: 135 - Follows: 201 - Updated: 3/18 - Published: 4/24/2022 - OC, Ashley W., Tali'Zorah, Shepard
Drake, Emissary by Scififan33 reviews
Tim could say with certainty that he was having a bad day. Stupid magician, stupid spells. They had a plan to deal with him, they did! That plan did not involved Tim being hit. Or waking up on an alien planet. But he could adapt. But what he really wanted was to go home. Since he couldn't, he'd help them find a way to peace with their creators, they had saved his life after all
Crossover - Batman & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 9 - Words: 37,133 - Reviews: 31 - Favs: 87 - Follows: 113 - Updated: 3/18 - Published: 8/24/2024 - Timothy D./Red Robin, Tali'Zorah, Shepard
The Terminus Exarchate by infamouswestgate reviews
Qelet B'Norai, Batarian cartel-kin and agent of the Covenant, travels the swallowed-yet-undigested worlds of the Terminus Exarchate! Can he save the Covenant Empire from collapsing underneath its own great weight?
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 31 - Words: 94,790 - Reviews: 42 - Favs: 21 - Follows: 30 - Updated: 3/17 - Published: 9/11/2024
Percy Jackson, The Original N7 by GearTrail reviews
Commander Kate Shepard, commanding officer of the Normandy, was resurrected by Cerberus after the Normandy SR 1 was destroyed in a surprise attack by the Collectors. But even with her new mission, she couldn't forget her own, one that was passed down to her as a legacy of one of the greatest heroes Earth had, the long lost demigod Percy Jackson.
Crossover - Percy Jackson and the Olympians & Mass Effect - Rated: M - English - Fantasy/Sci-Fi - Chapters: 4 - Words: 27,674 - Reviews: 5 - Favs: 49 - Follows: 80 - Updated: 3/17 - Published: 1/5/2024
Expanded sky by mantale3 reviews
The alliance encounter the aliens of the Milky Way Galaxy.
Crossover - Firefly & Mass Effect - Rated: T - English - Sci-Fi/Humor - Chapters: 3 - Words: 2,392 - Reviews: 10 - Favs: 14 - Follows: 18 - Updated: 3/16 - Published: 11/12/2024
Ark effect Remake by EclipsePheniox reviews
After the attack on the Collector base failed, the Normandy SR-2 found themselves on Ark a planet roaming with primordial beasts. But as their Commander returns, things become more complex as they learn about Ark and the reason they are there and the purpose of the world.
Crossover - Mass Effect & ARK: Survival Evolved - Rated: T - English - Adventure/Sci-Fi - Chapters: 17 - Words: 47,826 - Reviews: 18 - Favs: 85 - Follows: 102 - Updated: 3/16 - Published: 1/3/2023 - Liara T'Soni, 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: 41 - Words: 144,496 - Reviews: 242 - Favs: 702 - Follows: 1,002 - Updated: 3/16 - Published: 7/8/2022 - Rookie, Shepard
The Last Shinobi by derTraeumer reviews
Fifty thousand years ago, the shinobi world fell to the Reapers, their potential too great a threat. Akane Uchiha, the last surviving kunoichi, awakens in the modern galaxy on Eden Prime. Joining Commander Shepard's fight, she blends ancient ninja skills with advanced tech to preserve this cycle from annihilation and ensure no world shares her home's tragic fate.
Crossover - Naruto & Mass Effect - Rated: M - English - Tragedy/Mystery - Chapters: 44 - Words: 251,171 - Reviews: 62 - Favs: 207 - Follows: 260 - Updated: 3/13 - Published: 7/4/2019 - OC, Admiral Hackett, Shepard
In Pursuit of Purpose by Bodacity2.0 reviews
An account of the adventures of one of the Emperor's Adeptus Custodes, and his attempts to accomplish his sole mission in a universe where that matters little. While introducing the grim darkness of the far future to Citadel Space, his journey leads him along an unexpected path.
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 6 - Words: 27,172 - Reviews: 23 - Favs: 95 - Follows: 125 - Updated: 3/12 - Published: 2/19 - OC, Garrus V., Ashley W., Shepard
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: 17 - Words: 204,292 - Reviews: 66 - Favs: 41 - Follows: 44 - Updated: 3/12 - Published: 8/11/2024 - [OC, Princess Allura] [Ashley W., Shepard]
The Galaxy's last shinobi by Kfbanime87 reviews
As for summary. His planet and people were gone. Destroyed by the reapers. But he survived. Now thousands of years in the future, Naruto must navigate a galaxy unfamiliar to him along with his ragtag crew of friends. All while he makes a name for himself and makes plans to destroy the reapers when they return
Crossover - Naruto & Mass Effect - Rated: M - English - Adventure/Humor - Chapters: 9 - Words: 85,578 - Reviews: 509 - Favs: 924 - Follows: 1,020 - Updated: 3/10 - Published: 3/27/2023 - Naruto U., Shepard
Star-Bound by The Incredible Muffin reviews
Some destinies are written out centuries, or even millennia, ahead of time. However, when destiny is derailed, new plans have to be implemented. Sometimes, that involves ripping someone away from the peaceful end they seek and thrusting them into a tide of never-ending war in order to fix what can never be repaired.
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Supernatural - Chapters: 41 - Words: 281,374 - Reviews: 1203 - Favs: 1,618 - Follows: 1,958 - Updated: 3/10 - Published: 5/29/2019
In a Galaxy Far Away by Emmett Brown reviews
After his death in the battle against the Emperor and saying his last goodbyes to his son Luke, Darth Vader, now Anakin Skywalker once more, thought he would go back to force. But instead he finds himself in a whole new galaxy tangled with a crew of unknowns and a new threat. This is his second chance, and he doesn't intend on throwing it away.
Crossover - Star Wars & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 3 - Words: 11,515 - Reviews: 19 - Favs: 60 - Follows: 87 - Updated: 3/8 - Published: 2/24 - Anakin Skywalker, Shepard
Solar Knight by SirPotat reviews
A warrior estranged from the lands he fought to save. Facing an expanse far larger than he could ever comprehend. That however is irrelevant, for he is not just a Guardian, he is a Titan. He is a warden against evil and a shield for the weak. No matter where he is, no matter his circumstances. He will fight, for that is what he was reborn to do.
Crossover - Mass Effect & Destiny - Rated: M - English - Chapters: 3 - Words: 9,233 - Reviews: 15 - Favs: 53 - Follows: 70 - Updated: 3/6 - Published: 1/14 - OC
Mass Effect: A Custodian's Tale by Glader96 reviews
The Adeptus Custodes. The Talons of the Emperor. The Emperor's Legion. Bar the Primarchs, the 10000 are the greatest warriors sworn to the Master of Mankind. For so long they did not concern themselves with the galaxy beyond Sol, after the Fall of Cadia they now depart the Throne World to wage war. One of their kind finds himself in a galaxy so very different from what he knows.
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 5 - Words: 12,261 - Reviews: 87 - Favs: 77 - Follows: 112 - Updated: 3/4 - Published: 1/30 - The Emperor, Garrus V., Miranda L., Shepard
In darkness together - trailer by Bl4ckHunter
A trailer for my planned fic in 'When Legends Meet' from Aragorn II Elessar.
Crossover - Star Wars & Mass Effect - Rated: T - English - Adventure - Chapters: 1 - Words: 1,655 - Favs: 6 - Follows: 5 - Published: 3/4
Mass Effect: Book of Korra by CommanderSheperddddd reviews
The world the knew is gone. Their mere existence contradicts all logic. But for Korra and the Krew rest isn't a luxury they cna afford, as even when placed in an unknown world, there is still need for heroes.
Crossover - Mass Effect & Legend of Korra - Rated: M - English - Sci-Fi/Horror - Chapters: 2 - Words: 4,010 - Reviews: 4 - Favs: 4 - Follows: 5 - Updated: 3/4 - Published: 11/18/2023 - Shepard, Korra, Mako, Bolin
It takes Time To Cleanse The Galaxy by ReligiousZealot reviews
The Tyranids, A devouring swarm summoned by the warp, traverse this new and unfamiliar galaxy, with only one goal in mind. devour, adapt, and overcome.
Crossover - Warhammer & Mass Effect - Rated: M - English - Sci-Fi/Parody - Chapters: 1 - Words: 3,163 - Reviews: 2 - Favs: 13 - Follows: 17 - Published: 3/3
Into the Howling Dark by long night of solace reviews
Hundreds of millions of years ago, Humanity, Forerunners and the SanShyuum, the tier-1 species protected the galaxy. But the peace never lasted as the threat of flood and the reapers brought the Milkyway to the edge of extinction. Now the warriors of the past needs to guide the future galaxy and stop history from repeating itself.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 9 - Words: 80,800 - Reviews: 104 - Favs: 226 - Follows: 304 - Updated: 3/2 - Published: 10/23/2024 - Master Chief/John-117, Didact, D. Anderson, Shepard
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