Mass Effect Crossovers
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Halo: Wormholes by TimeTraveller-1900 reviews
In this series of one-shots which is set in an alternative universe where the human race discovers how wormholes work. Suddenly human explorers and expeditions are travelling from one planet to another, from one solar system to the next, without spaceships. How will humanity cope with enemies within? How will they cope with the Citadel? More importantly, what about the Covenant?
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 2 - Words: 1,895 - Reviews: 1 - Favs: 22 - Follows: 27 - Published: 10/25 - Master Chief/John-117, C. Halsey, Kelly-087, Admiral Hackett
New era by martinantab reviews
THIS STORY IS PAUSED, I SHOULD CONTINUE I. FUTURE OR I WILL COMPLETELY REWRITE THIS STORY, DUE TO GRAMMAR ISSUES AND I THINK I RUSHED IT. BUT THANKS FOR THE REVIEWS, IT HELPED ME A LOT. I WILL PROPABLY REWRITE THE STORY AGAIN.
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Humor - Chapters: 4 - Words: 8,625 - Reviews: 12 - Favs: 41 - Follows: 58 - Updated: 10/25 - Published: 10/6 - T. Hood, Master Chief/John-117, Councilor Sparatus, Councilor Tevos
The Dream Effect by DarkPhoenixLady reviews
A rewrite of the original dream effect. Set hundreds of years after the Deep Dream series. Humanity has been slowly expanding across space, and has just encountered the citadel races. After a rocky start, the two groups start to co-exist. Then someone attacks Eden Prime and tries to remove the prothean beacon.
Crossover - Harry Potter & Mass Effect - Rated: T - English - Sci-Fi/Fantasy - Chapters: 24 - Words: 113,781 - Reviews: 8 - Favs: 49 - Follows: 69 - Updated: 10/24 - Published: 5/9 - Liara T'Soni, Tali'Zorah, Shepard
Humanity Perpetuum by Slim Dustpan reviews
My earliest work, now fully updated! (wow). Within is a tale of a collision of the absurd and rather horrifying world of Red alert and the rich world of the Citadel council, a clash of cultures and species with colourful characters and large scale intergalactic war. Filled with all varieties of Battle; Space Battles, Ground battles, Diplomatic Battles, and (possibly) many more!
Crossover - Command & Conquer & Mass Effect - Rated: T - English - Sci-Fi/Humor - Chapters: 5 - Words: 13,491 - Reviews: 18 - Favs: 48 - Follows: 74 - Updated: 10/24 - Published: 4/17/2018
Frontlines: the Attican Front by vmoneywashere reviews
For over half a decade, the Citadel is losing a war against the race simply nicknamed the Friskies (Lankies). Their worlds slowly being lost, armies even numbers in the hundreds of thousands wiped off the map, and millions dead. But hope can be found. A signal detected off in the Attician Traverse. A recon force ventures out: To find a duel between Humanity and the Lankies.
Crossover - Misc. Books & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 15,425 - Reviews: 15 - Favs: 92 - Follows: 144 - Updated: 10/24 - Published: 9/4
A Metal Guardian by JawsOnYou67 reviews
The Universal Century, only a few short years ago humanity nearly eradicated itself to the tune of a madman, now it spreads, free of most of its old hatred. Yet the galaxy won't let them rest. Terminal prepares the twin Queens as best it can. (Gundam x Mass Effect)
Crossover - Gundam UC & Mass Effect - Rated: T - English - Sci-Fi/Humor - Chapters: 22 - Words: 108,339 - Reviews: 132 - Favs: 364 - Follows: 453 - Updated: 10/23 - Published: 8/18/2020 - Amuro R., Char A., Tali'Zorah, Admiral Hackett
Never Fade Away by Ideas-Guy reviews
Lives are cheap and money is everything. That's how the orphanage made its money - lending out children for human expirementation. L is an old man at the age of fifteen and he knows he doesn't have much time left. All that mattered was getting out, but he soon learns that the world is a lot bigger than Night City. And that the galaxy is a lot bigger than Earth.
Crossover - Mass Effect & Cyberpunk 2077 - Rated: M - English - Adventure/Drama - Chapters: 42 - Words: 196,643 - Reviews: 305 - Favs: 965 - Follows: 1,085 - Updated: 10/23 - Published: 10/31/2022 - Shepard, V
To Sail Among the Stars by How-not-to-do-something reviews
The Universal Century promised a new Era, and brought conflict. But the stars shine on, awaiting those who seek a new start. Crossposted from Ao3.
Crossover - Gundam UC & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 11 - Words: 56,885 - Reviews: 27 - Favs: 81 - Follows: 101 - Updated: 10/22 - Published: 11/1/2022
The Final Horizon by Touhoufanatic reviews
Taking a different route of technology, humanity ascends to the stars upon Sails of light with hearts full of hope and adventure. the second Age of Exploration has truly begun, and nothing, not aliens, ancient space squids, or genocidal robots will stop humanity, and perhaps its greatest legend of the seas, from finding the Horizon once more! Rated T for now.
Crossover - Pirates of the Caribbean & Mass Effect - Rated: T - English - Adventure - Chapters: 5 - Words: 15,881 - Reviews: 63 - Favs: 318 - Follows: 448 - Updated: 10/20 - Published: 7/31/2022 - Capt. Jack Sparrow
When magic decides one war isn't enough by Alykto reviews
Following Voldemort's return after the Triwizard Tournament, Dumbledore realized he couldn't possibly handle the incoming conflict on his own. He needed a general to prepare the war. His summoning ritual then dragged Commandant Shepard, Specter and N7 Alliance Marine fighting the Reapers to 12 Square Grimmault.
Crossover - Harry Potter & Mass Effect - Rated: T - English - Adventure/Hurt/Comfort - Chapters: 7 - Words: 11,657 - Reviews: 13 - Favs: 24 - Follows: 30 - Updated: 10/19 - Published: 6/29 - Harry P., Ron W., Hermione G., Shepard
Mass Effect: Reaper T8 by ArcherEdgeBond reviews
A Reaper threat and three different Sheppards. how will the universe handle this. follow Geoff, John, and Jane Shepard as they fight the reapers for survival and fight a new threat soon to take hold.(this was a challenge given to me by my friend the unforgivenone19901. if you have not checked out his work please do) (Disclaimer: I do not own the rights, this is purely fanmade)
Crossover - Terminator & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 11 - Words: 29,958 - Reviews: 1 - Favs: 11 - Follows: 10 - Updated: 10/17 - Published: 2/25/2020
The Prelude of War by Indigard reviews
A very different Mass Effect galaxy encounters a strange and relentless invader that is on constant hunger for Biomass but they never know it's just a glimpse of what coming for them. Featuring: alternative history for every species, a bigger and more populated galaxy, cunning Asari, militarized and germanized human empire.
Crossover - Warhammer & Mass Effect - Rated: T - English - Chapters: 10 - Words: 182,216 - Reviews: 42 - Favs: 99 - Follows: 108 - Updated: 10/17 - Published: 11/6/2021 - Imperial Guard, Tyranids, OC, Shepard
Shepard From the Stars by ObviousHUN reviews
A Little snippet, where Shepard is in Chaldea (Not smart enough for a full story)
Crossover - Fate/stay night & Mass Effect - Rated: T - English - Chapters: 1 - Words: 842 - Reviews: 2 - Favs: 8 - Follows: 6 - Published: 10/15 - Leonardo da Vinci, Ritsuka F., Shepard - Complete
The Return of Hope by Masso 2010 reviews
Commander Shepard is dead. Knowing that they needed someone to complete his work fighting against the Reapers, The Illusive Man set his sights on the next best thing, Humanities greatest hero. The only problem is that Superman gave up on hero work a long time ago but can the threat of galactic extinction be enough for him to once again step into the light.
Crossover - Superman & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 32 - Words: 258,528 - Reviews: 328 - Favs: 721 - Follows: 821 - Updated: 10/15 - Published: 7/10/2020 - Clark K./Kal-El/Superman, Miranda L.
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: 4 - Words: 7,562 - Reviews: 33 - Favs: 147 - Follows: 264 - Updated: 10/14 - Published: 11/26/2022 - Master Chief/John-117, Cortana, Shepard
The Exiles:A New Power by Johnnieboy11 reviews
The beginning of the Battle For Earth signaled the start of the final, bloodiest campaign of the Human-Covenant War. Hastily, a plan is put into motion and an Ark Fleet, composed of a dozen Phoenix-class vessels and their escorts, makes the jump out of system. Either interference, or malfunction, causes their arrival to a new Galaxy, where new threats lurk just around the corner.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 13 - Words: 50,345 - Reviews: 230 - Favs: 766 - Follows: 1,149 - Updated: 10/14 - Published: 12/26/2021 - OC, Tali'Zorah, Admiral Hackett, Rael'Zorah
Sonic Effect by ideal man
time to save the galaxy super sonic style basically mass effect with sonic joining Shepard's crew
Crossover - Mass Effect & Sonic the Hedgehog - Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 635 - Favs: 1 - Follows: 2 - Published: 10/13 - Complete
New Start Plus: in spaaaaace! by omaster43 reviews
Nick Walters and his merry band of misfits are back with a story about helping Shepard and crew fight giant eldritch robot abominations, most likely through Dumb magic and crazy shenanigans This is a continuation of my previous story, so reading that one first is recommended. but I'm not your nanny you wanna be confused that's your choice. Oc-insert, just came from Dragon age
Crossover - Game X-overs & Mass Effect - Rated: M - English - Humor/Adventure - Chapters: 7 - Words: 172,184 - Reviews: 88 - Favs: 243 - Follows: 298 - Updated: 10/12 - Published: 6/6 - Garrus V., Tali'Zorah, Shepard
The Wayfarer by Umbral Choir reviews
In the twilight of the universe the Ihan-rii, a forgotten sect of protoss, face an uncertain future in a realm consumed by the hounds of the void and their dark master. Xiltar, the last member of the umbral choir will guide his people into a fate beyond the designs of the Xel'naga only to find that he traded one war of annihilation for another.
Crossover - StarCraft & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 55 - Words: 242,335 - Reviews: 52 - Favs: 134 - Follows: 159 - Updated: 10/11 - Published: 2/5
Sith Effect Extras by Metagray reviews
Moments in the universe of Sith Effect showing how the introduction of The Sith Alliance into The Citadel changes the galaxy of mass effect in various ways both big and small.
Crossover - Star Wars & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 1,386 - Reviews: 15 - Favs: 87 - Follows: 112 - Published: 10/10
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: 3 - Words: 16,658 - Reviews: 29 - Favs: 192 - Follows: 251 - Updated: 10/10 - Published: 6/25 - Ashley W., Liara T'Soni, Shepard
Massive Reckoning: Interstellar Assualt by vmoneywashere reviews
In the 2700s, the Milky Way is flourishing. Access to Forerunner ruins has allowed the races of the galaxy to explore their home and new galaxies. Now, a new fleet, lead by an Ancient Punic Class Fleet Carrier, is moving to explore a new galaxy. Soon enough, the UNSC will find itself embroiled in a new Great War, with a few standing in the way of mass extinction. (slow updates)
Crossover - Halo & Mass Effect - Rated: K+ - English - Sci-Fi - Chapters: 1 - Words: 7,524 - Reviews: 16 - Favs: 86 - Follows: 130 - Published: 10/9 - P. Cole, OC, Admiral Hackett, Shepard
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: 23 - Words: 346,784 - Reviews: 362 - Favs: 660 - Follows: 791 - Updated: 10/9 - Published: 12/28/2020 - OC, U. Wrex, Shepard, Councilor Tevos
Final Destination by The Abyssal Writer reviews
Dr. Datenshi had seen it all. He was there when Admiral Perry ended Japan's Isolationism, he was there when Emperor Meiji turned Japan into a World Power, he was there during the Greatest Generation of Demon Slayers. He was there when Humanity looked to the stars, and joined a galactic community. Dr. Datenshi had seen it all… But Fate, it seemed, wasn't done with him yet.
Crossover - Mass Effect & Kimetsu no Yaiba/鬼滅の刃 - Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 5,336 - Reviews: 2 - Favs: 19 - Follows: 33 - Published: 10/6 - Liara T'Soni, Tali'Zorah, Shepard, OC
The mark of the federation of independent species by migos501 reviews
(TESTING PHASE)“A single event can shape our lives or change the course of history.” United under a single banner, the federation stands as a testament that any species can thrive in harmony, gifted with technology that can tip the scale of an entire galaxy, they now face with a entirely new government and it’s sets of challenges(focusing on the mass effect story)
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 1 - Words: 5,676 - Reviews: 11 - Favs: 33 - Follows: 49 - Published: 10/6 - Master Chief/John-117, Shepard
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