Mass Effect Crossovers
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Ananke by Onyx Gungnir reviews
Explorers from the four Council species activated a dormant relay at the edge of charted space, hoping to find new planets that someone could one day call home and answers to ancient questions. But what they found was not a new home but a shattered planet—and in its orbit, something that would change everything for them. Mass Effect x Halo x BSG crossover.
Crossover - Halo & Mass Effect - Rated: M - English - Chapters: 2 - Words: 11,059 - Reviews: 15 - Favs: 96 - Follows: 153 - Updated: 6h - Published: 12/1/2024
Let There Be Light by Phorus Aedelmaer reviews
The Imperium of Man arrives in the Mass Effect galaxy, igniting war with the Citadel Council. As the Imperium sees only heresy, the Council scrambles to survive. The Reapers, faced with an empire that defies their cycle, prepare to adapt. With war looming, the fate of the galaxy hinges on whether diplomacy or extermination prevails.
Crossover - Warhammer & Mass Effect - Rated: T - English - Sci-Fi/Fantasy - Chapters: 8 - Words: 16,317 - Reviews: 32 - Favs: 47 - Follows: 66 - Updated: 10h - Published: 1/29
Mass Effect: From Hell, We Have Come by Deathzealot reviews
The Terran Dominion, now under the control of Emperor Valerian was going to send a colonial expedition outside of the Koprulu Sector when something went wrong and the entire Expedition, along with an observing Emperor and his Guard, is sent to a whole new universe with the new technology called the Mass Effect. Still the people of this new universe are not ready! For Hell has come!
Crossover - StarCraft & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 2 - Words: 7,556 - Reviews: 5 - Favs: 6 - Follows: 9 - Updated: 1/29 - Published: 1/28 - [Valerian M., Nova]
Godspeed by J0llyGood reviews
At the start of the Reaper War, an unlikely ally will help save the galaxy from certain doom at the hands of sentient machines. First contact between two humanities, what are the implications of such an event? Read more in here...
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Suspense - Chapters: 1 - Words: 6,720 - Reviews: 1 - Favs: 1 - Follows: 5 - Published: 17h - [Shepard, Liara T'Soni] Master Chief/John-117, T. Lasky
Tali'Zorah: Demonologist by Sheev314 reviews
I DO NOT OWN MASS EFFECT ALSO THE FIRST TWO CHAPTERS WILL HAVE HORROR ELEMENTS IN IT Tali'Zorah's pilgrimage on a haunted world turns into an adventure with the demon known as Shepard. Can she and her new infernal friend save the galaxy from the Reapers, or will the universe burn in the fires of a new war.
Crossover - Mass Effect & Pathfinder RPG - Rated: M - English - Sci-Fi/Horror - Chapters: 2 - Words: 8,478 - Reviews: 8 - Favs: 14 - Follows: 20 - Updated: 12/21/2024 - Published: 11/19/2024 - Tali'Zorah, Shepard
Boundaries Displaced by Hirowolfgang reviews
When a dormant Mass Effect is activated by Battarian pirates, it is affected by a mysterious phenomenon that displaces the Dreikruz en route to their final confrontation with the Quaestors. Now stranded Mitsuba and the Dreikruz have to put differences aside in order to work together with the Normandy SR-2 against the Collectors and the following Reaper war. For better or worse.
Crossover - Mass Effect & Super Robot Wars - Rated: M - English - Sci-Fi/Drama - Chapters: 10 - Words: 53,757 - Reviews: 19 - Favs: 39 - Follows: 58 - Updated: 20h - Published: 2/28/2023 - Garrus V., Shepard
The Diocese by pythoner101 reviews
Commander Chloe Sheperd learns of a new group vying for power in the depths of Omega. But this is no ordinary gang, but far more powerful and horrific, brought forth from a place where there is only war. As she learns of its deeds and ambitions Shepherd must make a momentous descision, and hope she does not come to regret it.
Crossover - Warhammer & Mass Effect - Rated: M - English - Chapters: 6 - Words: 11,819 - Reviews: 39 - Favs: 74 - Follows: 129 - Updated: 1/31 - Published: 5/10/2020
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: 2 - Words: 3,959 - Reviews: 4 - Favs: 10 - Follows: 13 - Published: 1/30 - The Emperor, Garrus V., Miranda L., Shepard
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: 29 - Words: 177,857 - Reviews: 93 - Favs: 56 - Follows: 78 - Updated: 1/30 - Published: 7/7/2024 - Garrus V., Shepard, Osiris, Cayde-6
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: 26 - Words: 78,120 - Reviews: 37 - Favs: 18 - Follows: 24 - Updated: 1/30 - Published: 9/11/2024
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: 10 - Words: 60,403 - Reviews: 7 - Favs: 60 - Follows: 88 - Updated: 1/30 - Published: 3/28/2023
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: 40 - Words: 222,774 - Reviews: 258 - Favs: 295 - Follows: 363 - Updated: 1/28 - Published: 4/26/2024 - Liara T'Soni, Tali'Zorah, Miranda L., Shepard
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: 25 - Favs: 149 - Follows: 198 - Updated: 1/27 - 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: 3 - Favs: 17 - Follows: 18 - Updated: 1/27 - 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: 143,816 - Favs: 7 - Follows: 7 - Updated: 1/27 - 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: 101 - Follows: 124 - Updated: 1/26 - Published: 6/7/2021 - Alma W., OC, Tali'Zorah, 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: 63 - Favs: 100 - Follows: 166 - 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: 24 - Follows: 33 - Updated: 1/26 - Published: 1/24 - Venom, Garrus V., Tali'Zorah, 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: 28 - Words: 175,811 - Reviews: 321 - Favs: 488 - Follows: 663 - Updated: 1/25 - Published: 8/7/2023
Galactic Warbooks by DeafeningEcho reviews
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 - Reviews: 2 - 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: 89 - Favs: 390 - Follows: 524 - 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: 26 - Favs: 93 - Follows: 115 - 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: 215 - Favs: 693 - Follows: 977 - 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: 628 - Favs: 1,945 - Follows: 2,327 - 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: 8 - Favs: 21 - Follows: 25 - Updated: 1/22 - Published: 1/14 - OC
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