Halo and Mass Effect Crossovers
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The Man, The Myth, The Legend by Grocamol reviews
A simple one shot fic I had made some time ago, time to share it. Enjoy!
Rated: M - English - Chapters: 1 - Words: 6,995 - Reviews: 10 - Favs: 44 - Follows: 33 - Published: 11/11/2023 - A. J. Johnson - Complete
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: 1354 - Favs: 2,005 - Follows: 2,385 - Updated: 11/9/2023 - Published: 6/8/2018 - SPARTAN-B312/Noble Six, Rookie, Shepard
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?
Rated: M - English - Adventure/Sci-Fi - Chapters: 2 - Words: 1,895 - Reviews: 2 - Favs: 40 - Follows: 51 - Published: 10/25/2023 - 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.
Rated: M - English - Adventure/Humor - Chapters: 4 - Words: 8,625 - Reviews: 12 - Favs: 43 - Follows: 60 - Updated: 10/25/2023 - Published: 10/6/2023 - T. Hood, Master Chief/John-117, Councilor Sparatus, Councilor Tevos
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: 663 - Favs: 2,041 - Follows: 2,998 - 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: 67 - Follows: 105 - Updated: 8/20/2023 - Published: 7/28/2023 - [Shepard, Tali'Zorah] Garrus V.
Beyond: A Mass Effect and Halo Story by yaknsneeze reviews
AU. 7 months after the events on the Citadel, Commander Shepard and an old ally return to fight an old enemy. Their new mission however, just got a lot more complicated. Post Mass Effect 3, and set in the Halo universe during the book Shadows of Reach.
Rated: M - English - Chapters: 4 - Words: 11,739 - Reviews: 8 - Favs: 23 - Follows: 40 - Updated: 8/3/2023 - Published: 6/27/2023 - Master Chief/John-117, Shepard
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: 1534 - Favs: 4,398 - Follows: 5,493 - Updated: 7/30/2023 - Published: 9/27/2016 - Master Chief/John-117, Cortana, Tali'Zorah, Leviathan
Here There Be Monsters by J-Litt-Press
What was supposed to be a training run for the crew of the USS Spirit of Fire turns into a fight for survival. An ancient evil has returned to wipe out all life in the galaxy, and the galaxy has descended into chaos and war. This brave ship and crew will travel to the darkest parts of space, fight impossible odds and face terror unimaginable to save the galaxy.
Rated: M - English - Horror/Adventure - Chapters: 1 - Words: 2,407 - Favs: 5 - Follows: 6 - Updated: 7/18/2023 - Published: 6/21/2023
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: 350 - Favs: 636 - Follows: 871 - Updated: 6/25/2023 - Published: 4/21/2022 - [Master Chief/John-117, Tali'Zorah] J. Cutter
Daily War With Shipgirls by Starco101 reviews
Story inspired by “Daily War With Monster Girls”! In the midst of the cruel Human-Covenant War, a new type of intelligence was created. Artificial constructs armed with the power of warships compressed into the size of human girls called “ship girls”. Can humanity’s greatest heroes keep their sanity with these unlikely companions? Halo/Mass Effect/Monster Musume crossover!
Rated: M - English - Adventure/Mystery - Chapters: 1 - Words: 6,206 - Reviews: 7 - Favs: 46 - Follows: 57 - Published: 5/21/2023 - Master Chief/John-117, OC, Cortana, Shepard
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: 4 - 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
Anomaly Effect by Mr Ragnarok reviews
La Ciudadela es el centro de la civilización galáctica, un lugar donde conviven diferentes especies diferentes en armonía.Un día, unas naves de la Ciudadela desaparece durante una prueba de un nuevo motor FTL. Los rastreadores indican que ha saltado a un sistema estelar desconocido. Los líderes de la Ciudadela deciden investigar, encontrandoce con algo inaudito.
Rated: M - Spanish - Chapters: 2 - Words: 2,746 - Reviews: 5 - Favs: 17 - Follows: 20 - Updated: 4/23/2023 - Published: 4/18/2023
Mass Effect: Spartans of the UNSC Stormbringer by Beowolf 43 reviews
first chapter is summery.
Rated: M - English - Sci-Fi/Adventure - Chapters: 2 - Words: 1,035 - Reviews: 4 - Favs: 9 - Follows: 20 - Updated: 4/12/2023 - Published: 12/3/2021
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: 122 - 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: 218 - Favs: 197 - Follows: 214 - 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: 30 - Updated: 3/8/2023 - Published: 2/3/2023 - Miranda K., OC, Admiral Hackett, Shepard
Lost Son of Terra Phoenix by Ares007 reviews
For eons past, they enjoyed the harvest of their farms. Countless civilizations breathed life because they allowed it. Now, they will die because he demands it. Halo/Mass Effect but with heavy elements from Warhammer 40k. M-Shep/Miranda, OC/Liara. HFY
Rated: M - English - Adventure/Romance - Chapters: 16 - Words: 116,869 - Reviews: 56 - Favs: 220 - Follows: 267 - Updated: 2/8/2023 - Published: 11/29/2021 - [SPARTAN-B312/Noble Six, Oriana L.]
United Earths Empire Rewrite 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: M - English - Adventure/Fantasy - Chapters: 2 - Words: 11,294 - Reviews: 15 - Favs: 128 - Follows: 162 - Updated: 1/31/2023 - Published: 1/5/2023
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: 99 - Follows: 159 - 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: 73 - Favs: 231 - Follows: 293 - Updated: 1/5/2023 - Published: 5/29/2022 - J. Keyes, J. Cutter, SPARTAN-B312/Noble Six, Jerome-092
Mass Effect Kills Halo by giblo126 reviews
I was frustrated and wanted to get something out.
Rated: K+ - English - Chapters: 1 - Words: 495 - Reviews: 36 - Favs: 2 - Follows: 2 - Published: 1/1/2023
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