Halo and Mass Effect Crossovers
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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
Rated: M - English - Sci-Fi/Adventure - Chapters: 16 - Words: 122,216 - Reviews: 837 - Favs: 1,897 - Follows: 2,374 - Updated: 4/4 - Published: 4/16/2020 - Master Chief/John-117, SPARTAN-B312/Noble Six, Tali'Zorah, Shepard - Complete
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.
Rated: M - English - Sci-Fi - Chapters: 1 - Words: 3,959 - Reviews: 8 - Favs: 25 - Follows: 50 - Published: 4/2 - Rookie, Tali'Zorah
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: 49 - Favs: 258 - Follows: 442 - Updated: 3/20 - Published: 11/26/2022 - Master Chief/John-117, Cortana, Shepard
Audax Novus by A-01 reviews
A bold new world - A strange new reality - Fresh trials, tribulations, allies, and enemies. John fell through the portal from the Mantles Approach, but his luck works in mysterious ways. Now stranded in an alternate reality, how will he strive forward? The galaxy takes a sharp turn from the world we know, and the Reaper threat looms just as large, but no longer so uncontested.
Rated: M - English - Adventure/Romance - Chapters: 26 - Words: 656,439 - Reviews: 824 - Favs: 1,886 - Follows: 2,315 - Updated: 3/2 - Published: 9/4/2020 - [Master Chief/John-117, Miranda L.] [Shepard, Tali'Zorah]
Noble Reborn (Timeline of Events) by TheJSmooth reviews
This is a timeline of events that intertwines the universes of Halo and several other fandoms, the biggest being Mass Effect. Changes here and there have altered the final script in the Infinite Journey of the Master Chief as well as his equal Noble Six. Dare to take a peek inside...
Rated: M - English - Sci-Fi/Adventure - Chapters: 5 - Words: 14,250 - Reviews: 2 - Favs: 14 - Follows: 15 - Published: 3/2 - Complete
Mass effect: the Jaded ones by Dozerrk reviews
A UNSC Human-covenant war-era battle group led by a Punic class supercarrier is introduced to a new galaxy. One where people are xenophilic, use to times of peace and harmony, and against disrupting the Status Quo. What will an extremely aggressive xenophobic and battle-hardened human faction add to the mix? and will their addition change the future of this galaxy. (No Spartans)
Rated: M - English - Adventure/Humor - Chapters: 6 - Words: 37,211 - Reviews: 78 - Favs: 198 - Follows: 300 - Updated: 2/29 - Published: 2/6/2022 - E. Buck, OC
The UNSC and her allies by Xenofoxwolf reviews
what happens when a multiversal entity decides to save several species from Extinction by pulling them from their original realities? what happens when those species get dropped around the UNSC before the human Covenant war during the insurrection?
Rated: M - English - Adventure - Chapters: 2 - Words: 6,081 - Reviews: 28 - Favs: 90 - Follows: 137 - Updated: 2/24 - Published: 2/18
On the Illusion of Might by evevee reviews
We thought ourselves powerful, able to conquer a galaxy with nothing but toys. When we overcame every challenge, breached the space between the galaxies themselves, what use were the words of a race ashamed of their own past? Yet we cannot deny that we were warned, for while a challenge to a human is laughable, a challenge to humanity is a death sentence.
Rated: M - English - Sci-Fi - Chapters: 28 - Words: 308,369 - Reviews: 2257 - Favs: 4,252 - Follows: 5,299 - Updated: 2/21 - Published: 2/21/2017 - Master Chief/John-117, Cortana, Garrus V., 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: 20 - Favs: 94 - Follows: 114 - Published: 2/19
To Become Something More by Sha825 reviews
Humanity discovers the Mass Effect earlier, and as a result, the First-Contact war doesn't end on Shanxi. A renegade Asari matriach ferries ancient knowledge to a new and unlikely ally, kick-starting a secretive program to recruit 75 children and make them something more. A hardened, militaristic, but united humanity emerges to the galactic scene. An ancient cycle rumbles to life.
Rated: M - English - Sci-Fi/Suspense - Chapters: 1 - Words: 2,110 - Reviews: 18 - Favs: 110 - Follows: 176 - Published: 2/13 - Master Chief/John-117, C. Halsey, Cortana, D. Anderson
The Adventures of the Lucen: The VykurCorp Conspiracy by General Rage reviews
Liara T'Soni continued her mission to protect the Galaxy while Commander Shepard is in another dimension. She must stop the Covenant and the allies they've gathered from wreaking havoc in a Galaxy without it's greatest hero. While she's had some success, there's a gathering storm on the horizon and one of her crew of misfits will be forced to confront her past before it clears.
Rated: M - English - Sci-Fi/Adventure - Chapters: 17 - Words: 275,180 - Reviews: 186 - Favs: 147 - Follows: 158 - Updated: 2/11 - Published: 6/26/2016 - OC, Liara T'Soni, U. Wrex - Complete
War of the Old Ones by Ian the Mechanic reviews
In forgotten ages past, two near eldritch forces vied for the very life essence of the Galaxy. Unknown to the young races, that war is still ongoing. how can the UNSC, the Citadel Council or the Covenant hope to stand against such forces, when they are still embroiled in their own petty squabbling? How could they hope to survive the War of the Old Ones?
Rated: M - English - Sci-Fi/Horror - Chapters: 28 - Words: 155,737 - Reviews: 178 - Favs: 359 - Follows: 524 - Updated: 2/7 - Published: 2/21/2022
A Whole New World by Spartan III Commando reviews
Noble six's story did not end on Reach, he escaped the doomed planet after saving the Pillar of Autumn, and he and 117 fought across each Halo, until an incident sent him to a whole new world. And he is wholly unprepared for the journey in store.
Rated: M - English - Sci-Fi/Adventure - Chapters: 13 - Words: 57,418 - Reviews: 82 - Favs: 436 - Follows: 616 - Updated: 2/7 - Published: 7/7/2016 - SPARTAN-B312/Noble Six
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: 614 - Favs: 1,450 - Follows: 2,027 - 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: 127 - Favs: 456 - Follows: 669 - Updated: 1/14 - Published: 6/20/2023 - Master Chief/John-117, T. Hood, Shepard, D. Udina
Salvation (ENG) by Z0n3theDaMn3d reviews
The knowledge of sin is the beginning of salvation. More than 40 years after the end of the war against the Covenant, a new storm is brewing on the edge of the human empire. Will the colonies of the Linwood Sector be able to withstand this new threat or will they burn like Harvest once did?
Rated: M - English - Sci-Fi/Adventure - Chapters: 10 - Words: 87,307 - Reviews: 163 - Favs: 427 - Follows: 630 - Updated: 12/26/2023 - Published: 10/8/2020 - T. Hood, Shepard, Councilor Tevos, Benezia
New Era II by martinantab reviews
The war has ended and UNSC/UEG can finally start with rebuilding. Former Covenant races created new alliance to prevent another big war. Everybody thought that they can live peacefully, but few years later UNSC Gargantua has discovered mysterious object in the Orion's arm and no one is sure, if everything will be the same again.
Rated: M - English - Adventure/Humor - Chapters: 5 - Words: 33,264 - Reviews: 48 - Favs: 222 - Follows: 323 - Updated: 12/11/2023 - Published: 10/28/2023 - Master Chief/John-117, T. Lasky, Councilor Tevos, Councilor Valern
Mass Effect: Halo Codex Version by Vulture Electra reviews
What would happen if the universes of both Halo, Mass Effect, and Avatar(James Cameroon) were combine into one universe. What would happen had Halo Humanity had an earlier first contact rather than their first contact being with the Covenant. How would things played out, find out in this fanfic called Mass Effect: Halo.
Rated: M - English - Adventure/Sci-Fi - Chapters: 1 - Words: 1,200 - Reviews: 1 - Favs: 19 - Follows: 23 - Published: 12/1/2023
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: 1350 - Favs: 1,982 - Follows: 2,361 - 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: 41 - 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: 42 - 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: 2,021 - Follows: 2,971 - 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: 103 - 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
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