Halo and Mass Effect Crossovers
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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.
Rated: M - English - Sci-Fi/Adventure - Chapters: 12 - Words: 46,335 - Reviews: 219 - Favs: 724 - Follows: 1,093 - Updated: 10/8 - Published: 12/26/2021 - OC, Tali'Zorah, Admiral Hackett, Rael'Zorah
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)
Rated: M - English - Sci-Fi - Chapters: 1 - Words: 5,676 - Reviews: 2 - Favs: 15 - Follows: 20 - Published: 10/6 - Master Chief/John-117, Shepard
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: 11 - Words: 43,836 - Reviews: 66 - Favs: 351 - Follows: 499 - Updated: 10/6 - Published: 7/7/2016 - SPARTAN-B312/Noble Six
New era by martinantab reviews
Human-Covenant war ends and and UEG started with rebuilding. Former covenant races, after Elite-Brute Coalition sucess, entered the coalition and few years later humans too and new aliance was born. They thought, they will live in peace with no wars and/or limited conflicts, this was destroyed after discovery of suspect object not far away from Tassili, new harvest colony
Rated: M - English - Adventure/Humor - Chapters: 1 - Words: 1,876 - Reviews: 3 - Favs: 11 - Follows: 15 - Published: 10/6 - T. Hood, Master Chief/John-117, Councilor Sparatus, Councilor Tevos
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: 24 - Words: 129,715 - Reviews: 142 - Favs: 288 - Follows: 432 - Updated: 10/2 - Published: 2/21/2022
Bellum Terranum by F35B reviews
In the year 2585 the Humans have mostly recovered from the effects of the Human-Covenant War, however unknown to them, there is a much larger Galaxy out there... one that doesn't take kindly to humanity and their... antics... However an old threat still lays out there, ready to strike. Pls Read & Review (Slight HFY)(AU)
Rated: T - English - Sci-Fi - Chapters: 6 - Words: 29,252 - Reviews: 165 - Favs: 306 - Follows: 469 - Updated: 9/30 - Published: 7/31
Galactic Conflicts: Tales of First Contact by TheDoctor1998 reviews
Humanity and its allies have stood strong after the Great War with the Covenant. Follow the Systems Alliance as it goes through a first contact nearly as disastrous as the one that lead to the Great War.
Rated: M - English - Sci-Fi - Chapters: 3 - Words: 15,458 - Reviews: 44 - Favs: 144 - Follows: 196 - Updated: 9/30 - Published: 2/6
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?
Rated: M - English - Adventure/Sci-Fi - Chapters: 11 - Words: 157,359 - Reviews: 215 - Favs: 952 - Follows: 1,367 - Updated: 9/17 - Published: 11/9/2020 - SPARTAN-B312/Noble Six, Tali'Zorah, Miranda L., 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: 609 - Favs: 1,875 - Follows: 2,774 - Updated: 9/16 - Published: 7/26/2019 - Master Chief/John-117, Cortana, Zaeed M., OC
Enduring the Flames of War by Masterdude21 reviews
A joint Asari-Turian operation salvaged a "package" from a derelict wreckage in the Terminus Systems, whereupon they release a force of war beyond their reckoning. Hoping to avoid another war, Commander Shepard recruits the "package" into her team. A simple act of kindness, unwittingly paving the way for a clash unlike the galaxy has ever seen. Fate directs the flames of war.
Rated: M - English - Sci-Fi/Horror - Chapters: 50 - Words: 748,897 - Reviews: 2570 - Favs: 3,938 - Follows: 4,764 - Updated: 9/14 - Published: 11/30/2015 - Master Chief/John-117, OC, Shepard
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: 49 - Follows: 79 - Updated: 8/20 - Published: 7/28 - [Shepard, Tali'Zorah] Garrus V.
Remnants by General Rage reviews
From Halo's ashes, a mismatched Alliance is born. UNSC soldiers now serve alongside both Batarian deserters and shifty Jackal Space Pirates. Now Shepard and Master Chief have to keep these strange bedfellows from killing one another before they can stop an emergent new threat to the galaxy. The Next Swashbuckling Chapter of the Wormhole Chronicles.
Rated: M - English - Adventure/Sci-Fi - Chapters: 39 - Words: 829,112 - Reviews: 810 - Favs: 476 - Follows: 539 - Updated: 8/7 - Published: 4/22/2016 - Master Chief/John-117, Cortana, Tali'Zorah, 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: 9 - Words: 84,696 - Reviews: 389 - Favs: 1,154 - Follows: 1,585 - Updated: 8/7 - Published: 2/11 - Cortana, Councilor Valern, Councilor Tevos, Councilor Sparatus
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: 21 - Follows: 35 - Updated: 8/3 - Published: 6/27 - 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. REWORK COMPLETED.
Rated: T - English - Adventure/Sci-Fi - Chapters: 19 - Words: 153,359 - Reviews: 1478 - Favs: 4,088 - Follows: 5,124 - Updated: 7/30 - 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: 344 - Favs: 574 - Follows: 803 - Updated: 6/25 - Published: 4/21/2022 - [Master Chief/John-117, Tali'Zorah] J. Cutter
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: 1 - Words: 9,844 - Reviews: 41 - Favs: 276 - Follows: 389 - Published: 6/20 - 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: 45 - Words: 777,857 - Reviews: 1295 - Favs: 1,841 - Follows: 2,194 - Updated: 6/16 - Published: 6/8/2018 - SPARTAN-B312/Noble Six, Rookie, Shepard
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: 6 - Favs: 36 - Follows: 50 - Published: 5/21 - Master Chief/John-117, OC, Cortana, Shepard
The Rook by Twisted Fate MK 2 reviews
On the way down to New Mombasa, Rookie falls into the Slipspace Rupture and ends up crashing down on Menae, high above Palaven, right in the midst of the Reaper War. From there, the war itself will shift and the fighting persists, but who knows what an ODST will add to the mix. (Redo of an older story)
Rated: M - English - Adventure - Chapters: 11 - Words: 39,102 - Reviews: 94 - Favs: 384 - Follows: 582 - Updated: 5/14 - Published: 7/8/2022 - Rookie, 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: 3 - Favs: 7 - Follows: 11 - Updated: 5/9 - Published: 1/27
A Galaxy of Inheritors and Usurpers by HaloZealotDemon reviews
The Separatists destroy the Covenant in a brutal war, yet in the 2570s they still persist in their efforts, but in two years they will be snuffed out. However The Gods have other plans. The Migrant fleet decides to escape through Relay 314 into unknown space, but instead meet "Sleep-deprived Titans with negative zero fucks to give." -LTCOL Church. Heavy AU, Rvb elements, swearing.
Rated: M - English - Sci-Fi/Drama - Chapters: 2 - Words: 17,488 - Reviews: 70 - Favs: 314 - Follows: 457 - Updated: 4/29 - Published: 12/25/2022 - Arbiter, T. Hood, Tali'Zorah, Councilor Sparatus
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
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: 18 - Follows: 21 - Updated: 4/23 - Published: 4/18
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: 3 - Favs: 9 - Follows: 19 - Updated: 4/12 - Published: 12/3/2021
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