Mass Effect Crossovers
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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: 26 - Favs: 154 - Follows: 203 - 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.]
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: 24 - Favs: 104 - Follows: 128 - 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: 68 - Favs: 108 - Follows: 178 - Updated: 1/26 - Published: 8/12/2024
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: 3 - 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: 92 - Favs: 396 - Follows: 531 - 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: 50,451 - Reviews: 27 - Favs: 97 - Follows: 119 - Updated: 1/24 - Published: 7/14/2024 - Space Marines, Deathwatch, U. Wrex, 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: 631 - Favs: 1,954 - Follows: 2,334 - 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: 9 - Favs: 23 - Follows: 30 - Updated: 1/22 - Published: 1/14 - OC
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: 4 - Favs: 13 - Follows: 18 - 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: 2158 - Favs: 5,518 - Follows: 6,340 - 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: 71 - Favs: 318 - Follows: 337 - 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: 67 - Favs: 184 - Follows: 247 - Updated: 1/19 - Published: 10/23/2024 - Master Chief/John-117, Didact, D. Anderson, Shepard
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: 12 - Favs: 39 - Follows: 46 - Updated: 1/16 - Published: 8/10/2022
Warcraft Effect Neko ver by UltraZeta120 reviews
A young soul was given a second chance by the Grim Reaper, to give them aid with the current problems with the world of Mass effect. Granted the power of Gamer and a new form, along with an army, she will be the fiery blade that protects the weak and cull the wicked of this galaxy. RTS Gamer, Nekomata Youkai protagonist with Warcraft 3 powers/army (thicc busty OCs).
Crossover - Warcraft & Mass Effect - Rated: M - English - Fantasy/Adventure - Chapters: 3 - Words: 14,976 - Reviews: 4 - Favs: 37 - Follows: 43 - Published: 1/15 - OC
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: 10 - Words: 49,478 - Reviews: 27 - Favs: 50 - Follows: 54 - Updated: 1/14 - Published: 3/13/2023
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: 16 - Words: 45,798 - Reviews: 18 - Favs: 84 - Follows: 100 - Updated: 1/13 - Published: 1/3/2023 - Liara T'Soni, Miranda L., Shepard
Maelstrom Effect Book 2: Shadows of Crimson by godospartan the Kitsune reviews
After Soverign's defeat, the sibling Commanders left to clean up the mess it left behind. But one of them was struck down by an unknown force. The next 2 years they go in search of the ones responsible, unknowing that a secret group is bringing their sibling back to life to fight the Reapers again. How will they react when they meet again? NaruxTali, Shakarian, Mature content later
Crossover - Naruto & Mass Effect - Rated: M - English - Sci-Fi/Hurt/Comfort - Chapters: 16 - Words: 183,558 - Reviews: 87 - Favs: 370 - Follows: 423 - Updated: 1/13 - Published: 12/25/2019 - Naruto U., J. Garson, Garrus V., Tali'Zorah
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: 3 - Words: 12,320 - Reviews: 38 - Favs: 143 - Follows: 228 - Updated: 1/11 - Published: 10/30/2024 - [Darth Vader, Tali'Zorah] Garrus V., Shepard
Exodus Into Fire by keita52 reviews
When the Battlestar Galactica, guided by Starbuck, makes the jump towards Earth, they find a planet encircled by giant black ships and a woman calling herself Commander Shepard telling them to leave before the Reapers attack them. With Earth not the safe haven they'd hoped for, the Colonial Fleet and their Cylon allies struggle to make a place for themselves in this new universe.
Crossover - Battlestar Galactica: 2003 & Mass Effect - Rated: M - English - Sci-Fi/Drama - Chapters: 19 - Words: 76,064 - Reviews: 127 - Favs: 336 - Follows: 481 - Updated: 1/10 - Published: 11/12/2014 - L. Adama/Apollo, K. Thrace/Starbuck, Ashley W., Shepard
Great Power Comes With Great Cost by Starco101 reviews
Commander Jane Shepard’s on a mission to assemble a crew to bring the fight to the Collectors. Unfortunately she’d wish that were that simple when she starts to encounter recruits with incredible abilities with “incredible” quirks. Will Shepard retain her sanity or go max managing her new band of recruits?
Crossover - Halo & Mass Effect - Rated: M - English - Humor/Adventure - Chapters: 1 - Words: 2,325 - Reviews: 4 - Favs: 13 - Follows: 11 - Published: 1/10 - Shepard, Master Chief/John-117, OC
Mass Avengers Effect by JungleFurious reviews
It's been thirty years since Thanos, since the endgame battle between his forces and the Avengers. Now the majority of the Avengers have retired, but the mantles have been filled by their children, now full-grown adults. When a portal sends a few of the Avengers to a new universe, things are going to get hectic. The world of Mass Effect will never be the same.
Crossover - Mass Effect & Avengers - Rated: M - English - Sci-Fi/Adventure - Chapters: 10 - Words: 79,789 - Reviews: 42 - Favs: 136 - Follows: 177 - Updated: 1/9 - Published: 6/19/2021 - [Shepard, Liara T'Soni] [OC, Tali'Zorah]
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 mankind will find itself staring down its counterpart. The Citadel Council comes face-to-face with the remnants of the Human Domain and the Persean Sector at large.
Crossover - Mass Effect & Starsector - Rated: M - English - Sci-Fi/Adventure - Chapters: 15 - Words: 73,275 - Reviews: 68 - Favs: 140 - Follows: 195 - Updated: 1/8 - Published: 3/11/2024 - Garrus V., Liara T'Soni, Admiral Hackett, C. Pressley
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