Mass Effect Crossovers
Filters
3.6K | Page 1 2 3 4 11 .. Last Next »

The Hero of Torfan and The Demon of Empire City by Mad Leprachaun reviews
She was an orphaned colonist turned soldier, and he was a bike courier turned Conduit. Both suffered hardships. Faced down insurmountable odds and won. Now, the weight of the galaxy rested on their shoulders. They were made strong, ruthless, all so when they face their destiny, they can make the impossible decisions, all for the common good. The galaxy depended on it.
Crossover - Mass Effect & inFAMOUS - Rated: M - English - Chapters: 9 - Words: 53,507 - Reviews: 6 - Favs: 54 - Follows: 82 - Updated: 11h - Published: 3/28/2023
The Traveler's Second Chance by Caldesan reviews
The Traveler has a different response to the Darkness. A story where the Guardians never accept the Darkness. The Traveler gave them a second chance, what do they do with it? Destiny shows up in Mass Effect. OC's for Destiny MC and Ghosts, different take on Destiny Lore
Crossover - Mass Effect & Destiny - Rated: M - English - Adventure/Romance - Chapters: 10 - Words: 95,286 - Reviews: 24 - Favs: 143 - Follows: 191 - Updated: 13h - Published: 8/6/2023
Agent Murphy S Law by Darkstar the Grimm reviews
That time I became an agent of the IMF tasked with completing missions across all of time and space. Killing monsters, fighting villains and saving people by derailing canon events. SIOC x Miranda Lawson x multicross girls.
Crossover - Fate/stay night & Mass Effect - Rated: M - English - Romance/Humor - Chapters: 6 - Words: 11,965 - Reviews: 2 - Favs: 16 - Follows: 18 - Updated: 13h - Published: 12/6/2024 - [OC, Miranda L.]
El Noble del Normandía Halo x Mass Effect by Aghriik
Reach, el bastión de la humanidad, ha caído. Uno de los Spartans del equipo Noble se quedó atrás para proteger al Pillar of Autumn, El es conocido como el Fantasma Viviente, el Lobo Solitario, la Parca Personal de la ONI... o simplemente, Noble Seis. Ahora, lejos de su hogar y su tiempo, deberá levantarse una vez más. No solo por un planeta. No solo por una especie. Una galaxia.
Crossover - Halo & Mass Effect - Rated: T - Spanish - Sci-Fi/Romance - Chapters: 16 - Words: 144,670 - Favs: 5 - Follows: 5 - Updated: 15h - Published: 1/6 - [SPARTAN-B312/Noble Six, Tali'Zorah] [Garrus V., Shepard]
A new world, the same old struggle by O pior reviews
A psychic soldier and survivor from the ruins of Fairport finds himself in a new world with apparently a chance to start over. But when the demons of his past threaten to resurface, he must prevent this new world from falling victim to another supernatural damage, running into a certain commander in a quest to save the galaxy in the process.
Crossover - Mass Effect & F.E.A.R. - Rated: T - English - Adventure/Supernatural - Chapters: 6 - Words: 63,116 - Reviews: 22 - Favs: 99 - Follows: 122 - Updated: 1/26 - Published: 6/7/2021 - Alma W., OC, Tali'Zorah, Shepard
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: 39 - Words: 215,632 - Reviews: 255 - Favs: 292 - Follows: 359 - Updated: 1/26 - Published: 4/26/2024 - Liara T'Soni, Tali'Zorah, Miranda L., Shepard
Halo Effect by kamilospl1312 reviews
What if UNSC replace System Allience from Mass Effect
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 5 - Words: 15,941 - Reviews: 57 - Favs: 94 - Follows: 151 - Updated: 1/26 - Published: 8/12/2024
Mass Effect: Web of Shadows by MacAndCheez reviews
Life was never easy for Edmond Willians, and neither was his demise, for as it turned out, Death itself made a mistake, which led to his premature demise, and so as a form of compensation, he's given the opportunity of reincarnating in any world of his choice alongside a boon choice. Now reincarnated as the soon-to-be legendary Commander Sheppard, he will take the galaxy by storm.
Crossover - Mass Effect & Marvel - Rated: M - English - Adventure/Sci-Fi - Chapters: 2 - Words: 5,887 - Reviews: 10 - Favs: 21 - Follows: 29 - Updated: 1/26 - Published: 1/24 - Venom, Garrus V., Tali'Zorah, OC
Mass Effect: Become Legend by Redgrave21 reviews
More than five years after the Reaper War, 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 the while a strange voice begins to tempt Garrus with… Salvation.
Crossover - Destiny & Mass Effect - Rated: M - English - Adventure/Romance - Chapters: 28 - Words: 170,799 - Reviews: 91 - Favs: 54 - Follows: 77 - Updated: 1/25 - Published: 7/7/2024 - Garrus V., Shepard, Osiris, Cayde-6
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: 28 - Words: 175,811 - Reviews: 320 - Favs: 486 - Follows: 663 - Updated: 1/25 - Published: 8/7/2023
Galactic Warbooks by DeafeningEcho
Throughout countless galaxies, civilizations have warred in the stars, clashing with their warships over endless worlds. Each of these civilizations calls their ships something different, let’s find out what those are.
Crossover - Mass Effect & Halo - Rated: K - English - Sci-Fi - Chapters: 8 - Words: 15,499 - Favs: 2 - Follows: 4 - Published: 1/24
Shadows and Dust by HistoricalHijinks reviews
Shattered, Reborn, Reforged, Remade. The gaze of the Pheonix Force, seeking purpose and understanding, falls upon the Reapers and their harvests. Disgusted by their perverted, farcical 'cycle', it decides to wipe their stain from the multiverse. Needing a perfect host, it waits tens of millennia until, as Hannah Shepard is miscarrying due to eezo radiation, it finds one in her womb
Crossover - X-Men & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 8 - Words: 43,410 - Reviews: 87 - Favs: 386 - Follows: 523 - Updated: 1/24 - Published: 6/25/2023 - Ashley W., Liara T'Soni, Shepard
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: 7 - Words: 50,446 - Reviews: 25 - Favs: 89 - Follows: 112 - Updated: 1/24 - Published: 7/14/2024 - Space Marines, Deathwatch, U. Wrex, 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: 37 - Words: 132,303 - Reviews: 214 - Favs: 693 - Follows: 978 - Updated: 1/22 - Published: 7/8/2022 - Rookie, Shepard
Slayer Effect by XAgent-Venom666X reviews
Flynn Taggart once had a different life, one he could remember before becoming the Slayer. But he has long since put that behind him. Killing the denizens of Hell had become his new reality and he accepted it completely. After vanquishing the Icon of Sin, he was catapulted into another universe he knew from his old life. Now he has new, yet familiar, enemies to Rip and Tear.
Crossover - Doom & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 20 - Words: 96,762 - Reviews: 626 - Favs: 1,939 - Follows: 2,320 - Updated: 1/22 - Published: 11/19/2020 - [OC, Liara T'Soni] Doomguy, 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: 2 - Words: 6,467 - Reviews: 7 - Favs: 20 - Follows: 21 - Updated: 1/22 - Published: 1/14 - OC
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: 13 - Words: 159,632 - Reviews: 53 - Favs: 39 - Follows: 42 - Updated: 1/21 - Published: 8/11/2024 - [OC, Princess Allura] [Ashley W., Shepard]
Stellar Spirit's Effect by vmoneywashere reviews
Two collections of civilizations on separate sides of the galaxy. Both having fought wars and calamities alike. Going through their own advancements, trials, and wars. Soon they will be brought together, to fight on the same side. (ME/Kancolle/Stellaris Fanfic)
Crossover - Mass Effect & Kantai Collection - Rated: T - English - Sci-Fi/Adventure - Chapters: 2 - Words: 3,833 - Reviews: 3 - Favs: 12 - Follows: 17 - Published: 1/20 - Garrus V., Shepard, Primarch Adrien Victus, OC
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: 31 - Words: 270,866 - Reviews: 2145 - Favs: 5,502 - Follows: 6,327 - Updated: 1/20 - Published: 6/5/2013 - Saren A., Shepard, OC
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: 50 - Words: 165,883 - Reviews: 69 - Favs: 317 - Follows: 336 - Updated: 1/20 - Published: 8/2/2019
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: 3 - Words: 32,780 - Reviews: 3 - Favs: 4 - Follows: 6 - Updated: 1/20 - Published: 5/24/2024 - Miranda L., Shepard, Sarah Morgan, OC
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: 7 - Words: 57,716 - Reviews: 63 - Favs: 179 - Follows: 238 - Updated: 1/19 - Published: 10/23/2024 - Master Chief/John-117, Didact, D. Anderson, Shepard
Justice Of A Spectre by Mace sheperd reviews
A foul mouthed schoolbus driver dies and is reincarnated into a universe that is a fusion of Pokemon And Mass Effect. After firing the crucible he alongside his Pokemon find themselves in the Young Justice universe. There's going to be some changes around here.
Crossover - Mass Effect & Young Justice - Rated: M - English - Sci-Fi/Adventure - Chapters: 1 - Words: 7,671 - Reviews: 2 - Favs: 12 - Follows: 16 - Published: 1/19 - Jack
Mass Effect Crossover by jetslinger333 reviews
This fiction has different type of mass effect crossover ideas and other types as well, read and review if you like the series I wrote it. Next Update Persona 3 reload x cyberpunk Edgerunner.
Crossover - Mass Effect & Kamen Rider - Rated: T - English - Sci-Fi/Adventure - Chapters: 32 - Words: 94,489 - Reviews: 58 - Favs: 48 - Follows: 53 - Updated: 1/18 - Published: 5/18/2014
RWBY Effect 2: Rebirth by Owriush reviews
A year and a half has gone by, since the attack on the Citadel. Team RWBY and the crew of the Normandy suffer a tragedy. Ending in the loss of many lives. Awakened now a few years later. The girls of team RWBY, Elizabeth Shepard and their new allies must fight against a threat. One even more dangerous then the last. This is their Rebirth into a new world of wonders and insanity.
Crossover - Mass Effect & RWBY - Rated: T - English - Adventure/Romance - Chapters: 5 - Words: 105,636 - Reviews: 11 - Favs: 38 - Follows: 45 - Updated: 1/16 - Published: 8/10/2022
3.6K | Page 1 2 3 4 11 .. Last Next »