Halo and Mass Effect Crossovers
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Halo Effect by kamilospl1312 reviews
What if UNSC replace System Allience from Mass Effect
Rated: T - English - Sci-Fi - Chapters: 2 - Words: 6,023 - Reviews: 93 - Favs: 151 - Follows: 247 - Updated: 14h - Published: 8/12/2024
Merged Stars by Lord of the Wall reviews
Through unknown forces of immense and unimaginable power, two galaxies merge and superpowers of both galaxies is forced to deal with the reality of the broken status quo. Jane Shepard, first human Spectre, finds herself in the center of the events to come. This is a 3-way crossover between the forementioned ME and Halo universes as well as Stargate. Knowledge of all are not needed.
Rated: T - English - Sci-Fi/Family - Chapters: 5 - Words: 29,009 - Reviews: 32 - Favs: 113 - Follows: 154 - Updated: 4/16 - Published: 3/20 - Master Chief/John-117, T. Hood, Atriox, Shepard
We're Just People by TheFlawlessCowboy reviews
What if Master Chief and Cortana had a child. What if that child was named Jane Shepard. What if the UNSC and Turians didn't have a hostile first-contact. Pre first-contact to (hopefully) post Me-3. Pray for me ya'll this one's ambitious.
Rated: T - English - Sci-Fi/Adventure - Chapters: 2 - Words: 7,281 - Reviews: 18 - Favs: 52 - Follows: 69 - Updated: 4/10 - Published: 4/6 - Master Chief/John-117, Arbiter, Linda-058, 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: 15 - Words: 170,013 - Reviews: 635 - Favs: 1,714 - Follows: 2,251 - Updated: 4/8 - Published: 2/11/2023 - Cortana, Councilor Valern, Councilor Tevos, Councilor Sparatus
Into the Howling Dark by long night of solace reviews
Hundreds of millions of years ago, Humanity, Forerunners and the SanShyuum, the tier-1 species protected the galaxy. But the peace never lasted as the threat of flood and the reapers brought the Milkyway to the edge of extinction. Now the warriors of the past needs to guide the future galaxy and stop history from repeating itself.
Rated: T - English - Sci-Fi/Adventure - Chapters: 10 - Words: 92,962 - Reviews: 128 - Favs: 242 - Follows: 322 - Updated: 4/6 - Published: 10/23/2024 - Master Chief/John-117, Didact, D. Anderson, Shepard
The Call to War by silencewillfall0091 reviews
In 2550 CE, 25 years into our war with the Covenant, a Turian fleet exploded out of the ice moon orbiting Lusitania. The Hierarchy, aching for a war since the humiliation of the Rachni invasion, stumbled into the most brutal conflict in recent galactic history.
Rated: T - English - Sci-Fi/Adventure - Chapters: 2 - Words: 4,022 - Reviews: 21 - Favs: 111 - Follows: 165 - Updated: 3/24 - Published: 2/2
Echoes of the Forerunners: A Covenant Unveiled (Hiatus) by Phorus Aedelmaer reviews
The Covenant War erupts with far-reaching consequences across two universes. As the UNSC struggles to survive, they form an unexpected alliance with the species of the Citadel Council. Creative liberties will be taken with the timelines, events, and characters of both franchises.
Rated: K+ - English - Sci-Fi - Chapters: 18 - Words: 33,532 - Reviews: 166 - Favs: 196 - Follows: 280 - Updated: 3/22 - Published: 9/8/2024 - Complete
The Terminus Exarchate by infamouswestgate reviews
Qelet B'Norai, Batarian cartel-kin and agent of the Covenant, travels the swallowed-yet-undigested worlds of the Terminus Exarchate! Can he save the Covenant Empire from collapsing underneath its own great weight?
Rated: T - English - Sci-Fi - Chapters: 31 - Words: 94,790 - Reviews: 42 - Favs: 21 - Follows: 30 - Updated: 3/17 - Published: 9/11/2024
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: 5 - Words: 35,740 - Reviews: 50 - Favs: 297 - Follows: 409 - Updated: 2/18 - Published: 10/9/2023 - P. Cole, OC, Admiral Hackett, Shepard
El Noble del Normandía Halo x Mass Effect by Aghriik reviews
Reach, el bastión de la humanidad, ha caído. Uno de los Spartans del equipo Noble se quedó atrás para proteger al Pillar of Autumn, El es conocido como el Fantasma Viviente, el Lobo Solitario, la Parca Personal de la ONI... o simplemente, Noble Seis. Ahora, lejos de su hogar y su tiempo, deberá levantarse una vez más. No solo por un planeta. No solo por una especie. Una galaxia.
Rated: T - Spanish - Sci-Fi/Romance - Chapters: 17 - Words: 154,999 - Reviews: 4 - Favs: 14 - Follows: 19 - Updated: 2/1 - Published: 1/6 - [SPARTAN-B312/Noble Six, Tali'Zorah] [Garrus V., Shepard]
Galactic Warbooks by DeafeningEcho reviews
Throughout countless galaxies, civilizations have warred in the stars, clashing with their warships over endless worlds. Each of these civilizations calls their ships something different, let’s find out what those are.
Rated: K - English - Sci-Fi - Chapters: 8 - Words: 15,499 - Reviews: 4 - Favs: 5 - Follows: 7 - Published: 1/24
To The Stars and Beyond: The Babysitter by tysons23 reviews
Cal - 141 and an ODST squad on board the cruiser OCS Ascraeus are sent on a mission to investigate some mysterious alien ruins and assasinate a high value targed in Covenant- controlled space.
Rated: T - English - Sci-Fi - Chapters: 1 - Words: 10,797 - Reviews: 3 - Favs: 14 - Follows: 17 - Published: 10/20/2024 - O'Brien, Cal-141
Odyssey of the Untrodden by RamPluto reviews
After centuries of relative peace and isolation, the races of Citadel Space have decided to make the bold and historic step of activating a dormant Relay. Unknowing stumblingly into a war that will change the shape of the entire galaxy.
Rated: T - English - Adventure/Sci-Fi - Chapters: 2 - Words: 8,806 - Reviews: 59 - Favs: 230 - Follows: 367 - Updated: 10/5/2024 - Published: 10/1/2024 - Master Chief/John-117, Garrus V., Tali'Zorah, Liara T'Soni
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: 54 - Words: 407,208 - Reviews: 1707 - Favs: 1,935 - Follows: 2,367 - Updated: 7/25/2024 - Published: 3/13/2013
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: 23 - Favs: 57 - Follows: 96 - Updated: 5/18/2024 - 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...
Rated: T - English - Fantasy/Sci-Fi - Chapters: 8 - Words: 25,101 - Reviews: 442 - Favs: 1,437 - Follows: 2,082 - Updated: 5/11/2024 - 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: 753 - Favs: 2,017 - Follows: 2,587 - Updated: 4/26/2024 - 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: 50 - Favs: 265 - Follows: 451 - Updated: 3/20/2024 - 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: 20 - Favs: 94 - Follows: 114 - Published: 2/19/2024
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: 626 - Favs: 1,526 - Follows: 2,117 - Updated: 2/4/2024 - 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: 131 - Favs: 463 - Follows: 675 - Updated: 1/14/2024 - 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: 1355 - Favs: 2,007 - Follows: 2,389 - 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: 663 - Favs: 2,044 - Follows: 2,999 - 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.
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: 4,401 - Follows: 5,495 - Updated: 7/30/2023 - Published: 9/27/2016 - Master Chief/John-117, Cortana, Tali'Zorah, Leviathan
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