Halo and Mass Effect Crossovers
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Outlaws of the Verse (REVISED: July 10th, 20204) by Coltkit Prods. Omniva Verse reviews
In the World of "The Last Spartan" by "DinoJake" (Sequel/Spinoff/AU/Multi-Xover). 1000 years since the Reapers' defeat. People stopped aging (Supposedly caused by the wave that reprogrammed the Reapers). Kept sustainable by Replicators, Dyson Spheres, & Magic. Meanwhile: 3 Powers battle for the soul of the Galaxies: The Space Forces, Pirates, & The Outlaws. My OCs must choose sides
Rated: T - English - Sci-Fi/Family - Chapters: 11 - Words: 84,893 - Reviews: 2 - Favs: 15 - Follows: 11 - Updated: 7/7 - Published: 10/21/2023 - OC, OC
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)
Rated: K+ - English - Sci-Fi - Chapters: 4 - Words: 31,484 - Reviews: 43 - Favs: 239 - Follows: 335 - Updated: 6/18 - Published: 10/9/2023 - P. Cole, OC, Admiral Hackett, Shepard
The Sins of our Fathers by MarkerMagnum reviews
Unknown to the Citadel Council, the Human-Covenant war nears its vicious end. Miranda Keyes is seconds too slow. Delta Halo fires, leaving UNSC space as a lifeless snapshot in time. The Citadel must morn the loss of a civilization they never knew.
Rated: T - English - Drama/Sci-Fi - Chapters: 13 - Words: 134,428 - Reviews: 549 - Favs: 1,550 - Follows: 2,057 - Updated: 5/27 - Published: 2/11/2023 - Cortana, Councilor Valern, Councilor Tevos, Councilor Sparatus
Halo: A New Journey by mgarner3199 reviews
Master Chief wakes up in the Mass Effect universe and joins Commander Shepard in an effort to stop the Reapers. With time running out, can they stop the extinction of every species, or will they fade into legend?First, they got to stop the Reapers though...
Rated: K - English - Sci-Fi/Romance - Chapters: 4 - Words: 4,078 - Reviews: 21 - Favs: 54 - Follows: 91 - Updated: 5/18 - Published: 12/7/2021 - Cortana, Master Chief/John-117, Illusive Man, Shepard
The Wreck by Gabenator5 reviews
After the destruction of the Normandy, Tali'Zorah sets out to explore the lesser-explored regions of the galaxy in search of rare materials for the Migrant Fleet. During her adventures, she stumbles upon something that shouldn't exist within her universe. The galaxy will never be the same... [Rework: COMPLETED]
Rated: T - English - Fantasy/Sci-Fi - Chapters: 8 - Words: 25,101 - Reviews: 434 - Favs: 1,366 - Follows: 1,971 - Updated: 5/11 - Published: 1/7/2018 - Tali'Zorah
Voyage unto Infinity by supertruckin reviews
The USS Voyager comes face to face with the massive ship that is the UNSC Infinity after Voyager's nearly fatal first test of their quantum slipstream drive. Getting home isn't their only issue. They will have to work together in order to unravel the ancient threat that plagues the new galaxy that they find themselves in. Star Trek:Voyager, Mass Effect, and Halo triple crossover
Rated: T - English - Sci-Fi/Adventure - Chapters: 16 - Words: 92,085 - Reviews: 739 - Favs: 1,920 - Follows: 2,465 - Updated: 4/26 - Published: 4/10/2019 - Master Chief/John-117, Cortana, Shepard
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.
Rated: T - English - Sci-Fi/Adventure - Chapters: 5 - Words: 10,714 - Reviews: 47 - Favs: 248 - Follows: 428 - Updated: 3/20 - Published: 11/26/2022 - Master Chief/John-117, Cortana, Shepard
Legacy by WisdomOfCelestials reviews
Keys, Answers, Questions, Doors. What starts, What ends? Lord of Admirals, Lord of Beggars. Time and Un-Time
Rated: T - English - Chapters: 1 - Words: 9,444 - Reviews: 16 - Favs: 86 - Follows: 105 - Published: 2/19
The Sword of the Geth by Doctor poo and the TURDIS reviews
Dying on Mantle's Approach, Cortana wakes up in an unfamiliar environment. In her drive to get home, she 'employs' the assistance of the local synthetics. She never wanted to be a galactic overlord. But a UNSC AI in an environment woefully unprepared for one of her caliber makes an easy one.
Rated: T - English - Sci-Fi/Humor - Chapters: 23 - Words: 123,604 - Reviews: 603 - Favs: 1,394 - Follows: 1,949 - Updated: 2/4 - Published: 11/23/2023 - Cortana, Shepard
On the Shoulders of Giants by Shoot The Runner reviews
Two galaxies thrown together by a cosmic fluke. On one side of the galaxy, the war-weary UNSC vows to rebuild and become a giant in the stars so that they will never be so helpless again. Whilst another humanity is still finding its feet in the Citadel, with treachery and politics hindering its progress. How does the merging of two galaxies impact the course of all of their fates?
Rated: T - English - Sci-Fi/Adventure - Chapters: 2 - Words: 19,589 - Reviews: 125 - Favs: 446 - Follows: 652 - Updated: 1/14 - Published: 6/20/2023 - Master Chief/John-117, T. Hood, Shepard, D. Udina
All the Stars by BlueWay reviews
When the Long Night of Solace is evaporated over Reach via the weaponized usage of a Slipspace Drive, it ferries with it in its swallowed sections the Covenant Empire and, more horrifyingly, the desperate measures that the UNSC used to fight them. When they are found in a universe on the precipice of their own history, the meaning of the term "Mass Effect" will change forever.
Rated: T - English - Sci-Fi/Adventure - Chapters: 46 - Words: 802,179 - Reviews: 1344 - Favs: 1,945 - Follows: 2,324 - Updated: 11/9/2023 - Published: 6/8/2018 - SPARTAN-B312/Noble Six, Rookie, Shepard
It Started At Shanxi by SpaceTurtleOX reviews
Fifty years after the end of the Human-Covenant War an ill-fated UNSC expedition opens Relay 314, revealing a civilization unprepared for their arrival, and relics from a terrible past.
Rated: T - English - Sci-Fi/Adventure - Chapters: 17 - Words: 90,290 - Reviews: 657 - Favs: 2,004 - Follows: 2,949 - Updated: 9/16/2023 - Published: 7/26/2019 - Master Chief/John-117, Cortana, Zaeed M., OC
Spectre with a Spartan Sister by ZeBear reviews
In 2574, after the formation of the United Sentient Species Federation, they find more intelegent life. Having infiltrated the Normandy Project, they save John Shepard from dying after the Collectors attack at the end of Mass Effect 1. Neglecting to tell his friends. Now with and entire Federation of Species behind him, instead of Cerberus, how will John deal with it all?
Rated: T - English - Sci-Fi - Chapters: 5 - Words: 6,717 - Reviews: 11 - Favs: 64 - Follows: 103 - Updated: 8/20/2023 - Published: 7/28/2023 - [Shepard, Tali'Zorah] Garrus V.
The Unknown Defender by Gabenator5 reviews
A new faction stirs, its green-clad enforcers seemingly unstoppable. Rumors spread, pirate bases go dark, and both the enslaved and kidnapped are discovered free. Who are these new interlopers, and what is their goal? For good or ill, the powers that be intend to find out.
Rated: T - English - Adventure/Sci-Fi - Chapters: 19 - Words: 153,324 - Reviews: 1522 - Favs: 4,320 - Follows: 5,393 - Updated: 7/30/2023 - Published: 9/27/2016 - Master Chief/John-117, Cortana, Tali'Zorah, Leviathan
Unknown events have unmeasurable answers by El callampas reviews
When someone contacts the Quarians about old machinery, they should think twice before engaging with a strange yet so familiar species, a war, and circumstances that will shock two galaxies now that the rift is open.
Rated: T - English - Sci-Fi/Drama - Chapters: 19 - Words: 171,948 - Reviews: 348 - Favs: 613 - Follows: 851 - Updated: 6/25/2023 - Published: 4/21/2022 - [Master Chief/John-117, Tali'Zorah] J. Cutter
Un grand angle d'ombre by blackshamrock333 reviews
2560. L'humanité a survécu à la grande guerre contre les covenants et découvert l'espace concilien. Le Longest Day, prowler de l'UNSC en mission secrète, débarque en pleine attaque d'une colonie frontalière. Quelques jours plus tard, un médecin humain est découvert assassiné sur la Citadelle. Deux événements aléatoires, annonciateurs d'une course pour sauver la galaxie.
Rated: T - French - Sci-Fi/Adventure - Chapters: 3 - Words: 35,362 - Reviews: 3 - Favs: 7 - Follows: 11 - Updated: 5/9/2023 - Published: 1/27/2023
A fanfic idea of mine by Fantasy-and-SciFi-Lover reviews
Posting in both fanfiction and crossover sections.
Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 624 - Reviews: 4 - Favs: 3 - Follows: 5 - Published: 4/24/2023
Operation Hidden Paths: A Halo-Mass Effect Crossover by pj6778457 reviews
story of a new universe where the System Alliance has been replaced by the Unified Earth Government (UEG). Set in the worlds of Halo and Mass Effect
Rated: T - English - Adventure - Chapters: 1 - Words: 1,525 - Reviews: 14 - Favs: 68 - Follows: 123 - Published: 4/11/2023
Crucible of Clans by Lighting wolf knight
He would have his revenge upon Atriox And he might up even doing things he didn't expect. Rated T for violence, death, and profanity
Rated: T - English - Sci-Fi/Mystery - Chapters: 1 - Words: 814 - Favs: 2 - Follows: 3 - Published: 4/11/2023 - OC, Atriox, Liara T'Soni, O. Petrovsky
House divided by Lighting wolf knight
Leading a house was hard. Leading one in a new galaxy? Even harder. Rated T for violence, death, and profanity.
Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 803 - Favs: 4 - Follows: 3 - Published: 4/11/2023 - OC, Warden Eternal, Tali'Zorah, Illusive Man
Accounts of the Flood conflicts by hunter 139 reviews
A multicrossover series of one-shots depicting several franchises and their encounters with the Flood. I do not own Halo or any other franchises depicted in these stories.
Rated: T - English - Horror/Sci-Fi - Chapters: 41 - Words: 103,318 - Reviews: 216 - Favs: 194 - Follows: 210 - Updated: 3/17/2023 - Published: 1/15/2015 - Gravemind - Complete
Drop into Hell by Lighting wolf knight reviews
They have a lot more to do before its done. Rated T for violence, death, and profanity.
Rated: T - English - Adventure/Romance - Chapters: 3 - Words: 11,962 - Reviews: 1 - Favs: 19 - Follows: 28 - Updated: 3/8/2023 - Published: 2/3/2023 - Miranda K., OC, Admiral Hackett, Shepard
The Reclamation by Fade Maybe reviews
Through ONI's manipulation, the UNSC stumbles upon a Mass Relay and is dragged into a new war. They'll discover the battered races of the Citadel, the political intrigue of its factions, and a second group of humans governed by the Systems Alliance, divided by Cerberus, and lead by Commander Shepard. Yet no one can stop what is to come: the Reclamation, and the death of the galaxy.
Rated: T - English - Drama/Suspense - Chapters: 55 - Words: 409,476 - Reviews: 1683 - Favs: 1,872 - Follows: 2,297 - Updated: 2/27/2023 - Published: 3/13/2013
Immortal Galaxies by Lighting wolf knight reviews
An escape from an overrun galaxy lands them in another galaxy? What does being the biggest fish in the water gain you in a world without heavy hitters? Rated T for violence, death, and profanity.
Rated: T - English - Romance/Adventure - Chapters: 3 - Words: 4,777 - Reviews: 10 - Favs: 98 - Follows: 160 - Updated: 1/13/2023 - Published: 11/11/2021 - [OC, Vetra N.] T. Hood
United Earths Empire: The Beginning of a New Age by Destarien reviews
What if three Universes once separate come together. three different humanities with three different paths of technology merge into one galaxy. Citadel space will never be the same because the Schahl Empire and UNSC are here. Two Civilizations, one at war and one ready for war.
Rated: T - English - Fantasy/Sci-Fi - Chapters: 8 - Words: 21,362 - Reviews: 72 - Favs: 224 - Follows: 291 - Updated: 1/5/2023 - Published: 5/29/2022 - J. Keyes, J. Cutter, SPARTAN-B312/Noble Six, Jerome-092
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