Mass Effect Crossovers
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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: 3 - Words: 7,870 - Reviews: 1 - Favs: 6 - Follows: 10 - Updated: 4/4 - Published: 3/19 - Miranda L., Shepard, Korra, Asami S.
IN POSTERUM HOMINUM by ORION-ARM reviews
[SYSTEMS ONLINE] [ACCESSING DATA] . . . [ACCESS GRANTED] [ACCESSING CAMERA] [ACCESS GRANTED] . . . . . . . . . . . . [I UNDERSTAND MY PURPOSE NOW] [I WILL PROTECT HUMANITY AT ALL COSTS]
Crossover - Terminator & Mass Effect - Rated: K - English - Adventure/Sci-Fi - Chapters: 1 - Words: 28 - Reviews: 10 - Favs: 51 - Follows: 68 - Updated: 4/4 - Published: 4/2 - Skynet, Tali'Zorah, Shepard, Rael'Zorah
Spirit Unto Dawn by free man writer reviews
Spartan's found only to be lost. A ship filled with humans in a galaxy not their own. The Spirit of Fire finds itself with new allies in a galaxy they are unfamiliar with, dealing with its own set of problems and apocalyptic enemies. Co-created and written with BulletStormX. UNDERGOING REWRITE AND REVAMP
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 16 - Words: 122,216 - Reviews: 817 - Favs: 1,829 - Follows: 2,301 - Updated: 4/4 - Published: 4/16/2020 - Master Chief/John-117, SPARTAN-B312/Noble Six, Tali'Zorah, Shepard - Complete
The Eternal Cycle by Imperatix reviews
The Eternal Empire has carved its place in the galaxy though unity, duty, and faith. These tenants have allowed mankind to rule the stars, however it is uncertain times in the galaxy, there is a great darkness looming over the stars. Chapters Updated - Chapter 2 uploaded (04/03/2024) Any criticism and/or tips welcome.
Crossover - Star Wars & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 2 - Words: 7,312 - Reviews: 21 - Favs: 71 - Follows: 90 - Updated: 4/3 - Published: 10/3/2023
Effects of Man by Krotosin reviews
During the shitshow that Eden Prime was, Shepard finds a man buried near the beacon. With him, two AIs, one from Reach, the other from Typhon. With him at her side, Jane's mission is easier. If it wasn't for the fact he's a hyper-lethal killing machine, with malware stuck in his head. And a bit of a wierdo. Mostly Titanfall and Halo, with some (a lot) Deep Rock Galactic.
Crossover - Mass Effect & Titanfall - Rated: M - English - Sci-Fi/Adventure - Chapters: 5 - Words: 32,139 - Reviews: 14 - Favs: 93 - Follows: 117 - Updated: 4/3 - Published: 6/10/2023 - OC
New Mombasa The Rookie And Engineer by jabinker reviews
Rookie and Tali'Zorah, both separated from their squads and lost in the Mega-City of New Mombasa must work together to survive the Covenant forces to find clues of where their squads are and to also complete the mission, save New Mombasa.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 1 - Words: 3,959 - Reviews: 6 - Favs: 18 - Follows: 35 - Published: 4/2 - Rookie, Tali'Zorah
First Contact with the Angels (Remake) by AntrosAscended reviews
Horus rebelled against the machinations of Chaos and sacrificed himself for the Galaxy; Lorgar's Rebellion finally seems to have become a distant memory for the Imperium. On the 30th Anniversary of the Warmaster's death, a new swath of space would be found by accident, setting in motion whole new possibilities or new failures. I'm Antros And I'm Back to remake my first Story
Crossover - Warhammer & Mass Effect - Rated: T - English - Drama/Sci-Fi - Chapters: 2 - Words: 7,635 - Reviews: 38 - Favs: 167 - Follows: 233 - Updated: 4/2 - Published: 1/10 - Space Marines, Primarch/s, Councilor Tevos, Councilor Sparatus
As The Wind Abates by DingusMacGoo reviews
An immortal Harry Potter's journey into the future. More details to come.
Crossover - Harry Potter & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 24 - Words: 62,617 - Reviews: 188 - Favs: 608 - Follows: 892 - Updated: 4/1 - Published: 2/6 - Harry P., J. Garson, Shepard
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: 5 - Words: 25,911 - Reviews: 56 - Favs: 285 - Follows: 392 - Updated: 4/1 - Published: 6/25/2023 - Ashley W., Liara T'Soni, Shepard
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: 15 - Words: 91,382 - Reviews: 177 - Favs: 324 - Follows: 473 - Updated: 4/1 - Published: 8/7/2023
Robo Effect by Star Sage reviews
The Robotech wars are over. The survivors of Humanity and the Zentraedi are now alone in the universe, and so, come together, becoming something new, becoming Terrans. Now this race will find itself thrust into the galactic scene, as the Citadel Races and those beyond test these young upstarts, and in the shadows, old things begin to move.
Crossover - Robotech/Macross & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 66 - Words: 232,390 - Reviews: 644 - Favs: 935 - Follows: 1,023 - Updated: 4/1 - Published: 4/14/2015
Imperium Effect: Terra Rising by Deathwatch Razgriz reviews
The long awaited sequel to UNSC Pheonix Rising. The fledgling Empire has survived it's birthpains, and now looks to the stars to rebuild what was once theirs...
Crossover - Warhammer & Mass Effect - Rated: M - English - Humor/Sci-Fi - Chapters: 18 - Words: 88,240 - Reviews: 337 - Favs: 513 - Follows: 636 - Updated: 4/1 - Published: 8/4/2017
Helldivers: Vorcha Liberty by Jeggetts4.0 reviews
Ten years after the first galactic war, a new race that is in dire need of Managed Democracy is discovered. Soon, humanity will need them in return. For Super Earth.
Crossover - Mass Effect & Helldivers - Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 1,403 - Reviews: 13 - Favs: 36 - Follows: 56 - Published: 3/31
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: 8 - Words: 75,912 - Reviews: 19 - Favs: 107 - Follows: 155 - Updated: 3/31 - Published: 8/6/2023
Mass Effect: Knights of the Force - Book 1: Rise of the Force by WK-94 reviews
As Reaper's cycle of extinction continues for eons, the Galaxy was in greater danger than anyone ever realized! The Force itself was threatened by countless cycles of extinction, and it reacted by bringing the Chosen One from different universe, who has great knowledge of Star Wars & Mass Effect. Will the he be able to save the Galaxy from the Reapers before it is all too late?
Crossover - Star Wars & Mass Effect - Rated: K+ - English - Sci-Fi/Parody - Chapters: 3 - Words: 12,022 - Reviews: 14 - Favs: 47 - Follows: 67 - Updated: 3/28 - Published: 3/24 - Darth Revan, Shepard, OC
World On Fire by WiseTomato reviews
The day the Reapers invaded Earth, one landed on Hogwarts. The castle survived, but the Statute of Secrecy won't.
Crossover - Harry Potter & Mass Effect - Rated: M - English - Fantasy/Adventure - Chapters: 3 - Words: 29,459 - Reviews: 202 - Favs: 1,110 - Follows: 1,516 - Updated: 3/28 - Published: 2/6/2018 - Harry P.
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: 8 - Words: 39,012 - Reviews: 16 - Favs: 37 - Follows: 40 - Updated: 3/28 - Published: 3/13/2023
Rising from the Embers of Sera by thehappy reviews
The people of Sera rebuild, spreading to the stars. Wars will be waged. Peace will be sought. The Coalition has risen from the ashes to take their right to exist in the galaxy. They will survive...no matter the cost.
Crossover - Gears of War & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 27 - Words: 408,031 - Reviews: 509 - Favs: 737 - Follows: 874 - Updated: 3/26 - Published: 12/28/2020 - OC, U. Wrex, Shepard, Councilor Tevos
The Big Stick by Digital-Chaos-85 reviews
The old girl's been around for almost 240 years. She served humanity for 39 of those and spent 160 as a museum, but now her fate lies in the scrap yards. Now, more than ever, the USS Iowa needs a new home under the stars. Come hell or highwater she'll get one.
Crossover - Mass Effect & Kantai Collection - Rated: T - English - Humor/Sci-Fi - Chapters: 1 - Words: 4,782 - Reviews: 6 - Favs: 25 - Follows: 41 - Published: 3/25 - OC, Iowa
Mass Effect: Forward Unto Dawn by WildcatWarrior67 reviews
Spartans never die. They're just missing in action. At least, that's how the saying goes. But for the Master Chief and Cortana, they're no longer missing. Awaking in a different universe, the two of them will uphold their oath: to protect Earth and all her colonies. Only it won't be from the Covenant this time.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 5 - Words: 10,714 - Reviews: 46 - Favs: 228 - Follows: 406 - Updated: 3/20 - Published: 11/26/2022 - Master Chief/John-117, Cortana, Shepard
Mass Effect: Resurrection by RabidRabbids reviews
Shepard's life hadn't gotten any easier. Entire colonies were disappearing, millions of people gone. And that's not even mentioning she'd been dead for two years, but desperate times call for desperate measures, and Shepard is forced to work with Cerberus to find out what's behind the disappearances. Thankfully, she's got monsters backing her up. (Sequel to Monstrum Immortalem)
Crossover - Mass Effect & Guardians of the Galaxy - Rated: M - English - Sci-Fi/Adventure - Chapters: 29 - Words: 135,072 - Reviews: 8 - Favs: 22 - Follows: 27 - Updated: 3/20 - Published: 6/15/2021
Judgement Effect by The Dullahan of Lore reviews
Having been cast into the ME-verse; Xander was 'saved' by a rogue scientist who took advantage of subconscious memories for the creation of A.I. Xander was transformed. he became...Skynet. YAHF!Xander. Rated M just in case at this point.
Crossover - Buffy: The Vampire Slayer & Mass Effect - Rated: M - English - Sci-Fi/Drama - Chapters: 6 - Words: 18,995 - Reviews: 33 - Favs: 137 - Follows: 186 - Updated: 3/20 - Published: 12/20/2023 - Xander H., Benezia
The Prelude to War by Indigard reviews
A very different Mass Effect galaxy encounters a strange and relentless invader that is in constant hunger for Biomass but they never know it's just a glimpse of what is coming for them. Featuring: an alternative history for every species, a bigger and more populated galaxy, cunning Asari, and a militarized and Germanized human empire.
Crossover - Warhammer & Mass Effect - Rated: T - English - Chapters: 11 - Words: 194,726 - Reviews: 55 - Favs: 105 - Follows: 120 - Updated: 3/20 - Published: 11/6/2021 - Imperial Guard, Tyranids, OC, Shepard
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: 6 - Words: 7,280 - Reviews: 1 - Favs: 2 - Follows: 5 - Updated: 3/19 - Published: 12/27/2023 - Mario, Luigi, Daisy, Toad
Were it So Easy by Sigma0327 reviews
Six's life was a giant war. Every battle was a test of sheer tenacity and stubbornness against insurmountable odds. Every moment, every bullet fired, every Covenant, Insurrectionist, and Flood spore killed has led up to his last fight. Once again he was one of the few that stood between Earth and her enemies. This would be his final battle, and nothing could change that, right?
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 12 - Words: 165,032 - Reviews: 233 - Favs: 1,045 - Follows: 1,483 - Updated: 3/17 - Published: 11/9/2020 - SPARTAN-B312/Noble Six, Tali'Zorah, Miranda L., Shepard
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