Halo and Mass Effect Crossovers
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Mass Effect: ODST Lost by Fantasy Theatre reviews
ODST Captain Nathanial Renkov unintentionally becomes the first Helljumper to survive being dropped through a Slipspace anomaly. The problem? He has no idea where is and is surrounded by aliens the UNSC has no record of. Even worse? No one knows what the UNSC is. Follow his story as he tries to make sense of his new surroundings while trying to survive a new galactic threat.
Rated: M - English - Sci-Fi/Adventure - Chapters: 6 - Words: 19,811 - Reviews: 24 - Favs: 114 - Follows: 173 - Updated: 22h - Published: 4/24/2022 - OC, Ashley W., Tali'Zorah, Shepard
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: 41 - Favs: 21 - Follows: 28 - Updated: 3/17 - Published: 9/11/2024
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: 19 - Words: 111,382 - Reviews: 463 - Favs: 634 - Follows: 889 - Updated: 3/16 - Published: 2/6/2023
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: 41 - Words: 144,496 - Reviews: 226 - Favs: 699 - Follows: 997 - Updated: 3/16 - Published: 7/8/2022 - Rookie, Shepard
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: 9 - Words: 80,800 - Reviews: 103 - Favs: 219 - Follows: 294 - Updated: 3/2 - Published: 10/23/2024 - Master Chief/John-117, Didact, D. Anderson, Shepard
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: 33 - Words: 134,631 - Reviews: 562 - Favs: 1,219 - Follows: 1,709 - Updated: 2/23 - Published: 12/26/2021 - OC, Tali'Zorah, Admiral Hackett, Rael'Zorah
Halo Effect by kamilospl1312 reviews
What if UNSC replace System Allience from Mass Effect
Rated: T - English - Sci-Fi - Chapters: 6 - Words: 18,843 - Reviews: 85 - Favs: 144 - Follows: 227 - Updated: 2/21 - Published: 8/12/2024
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: 29 - Words: 316,768 - Reviews: 2316 - Favs: 4,332 - Follows: 5,388 - Updated: 2/21 - Published: 2/21/2017 - Master Chief/John-117, Cortana, Garrus V., Shepard
Book One: Harvest by Believer218 reviews
The year is 2583. Humanity stands strong, even twenty-six years after a disastrous first contact. But it seems that wherever they go, war will follow. And this war will grip the galaxy like no other. The first adventure of Mass Effect: The Reclaimer Saga. Rated M for graphic depictions of violence.
Rated: M - English - Sci-Fi/Adventure - Chapters: 8 - Words: 38,961 - Reviews: 114 - Favs: 127 - Follows: 182 - Updated: 2/20 - Published: 4/4/2024 - [Master Chief/John-117, Ashley W.] Arbiter, Saren A.
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: 287 - Follows: 401 - Updated: 2/18 - Published: 10/9/2023 - P. Cole, OC, Admiral Hackett, 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: 676,710 - Reviews: 847 - Favs: 1,947 - Follows: 2,382 - Updated: 2/16 - Published: 9/4/2020 - [Master Chief/John-117, Miranda L.] [Shepard, Tali'Zorah]
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: 1 - Words: 2,164 - Reviews: 15 - Favs: 88 - Follows: 127 - Published: 2/2
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: 13 - Follows: 18 - Updated: 2/1 - Published: 1/6 - [SPARTAN-B312/Noble Six, Tali'Zorah] [Garrus V., Shepard]
Ananke by Onyx Gungnir reviews
Explorers from the four Council species activated a dormant relay at the edge of charted space, hoping to find new planets that someone could one day call home and answers to ancient questions. But what they found was not a new home but a shattered planet—and in its orbit, something that would change everything for them. Mass Effect x Halo x BSG crossover.
Rated: M - English - Chapters: 2 - Words: 11,113 - Reviews: 33 - Favs: 157 - Follows: 246 - Updated: 2/1 - Published: 12/1/2024
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: 4 - Follows: 6 - Published: 1/24
Great Power Comes With Great Cost by Starco101 reviews
Commander Jane Shepard’s on a mission to assemble a crew to bring the fight to the Collectors. Unfortunately she’d wish that were that simple when she starts to encounter recruits with incredible abilities with “incredible” quirks. Will Shepard retain her sanity or go max managing her new band of recruits?
Rated: M - English - Humor/Adventure - Chapters: 1 - Words: 2,325 - Reviews: 6 - Favs: 16 - Follows: 16 - Published: 1/10 - Shepard, Master Chief/John-117, OC
Echoes of the Forerunners: A Covenant Unveiled 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: 17 - Words: 33,312 - Reviews: 161 - Favs: 190 - Follows: 276 - Updated: 1/4 - Published: 9/8/2024
Were it So Easy by Sigma0327 reviews
Six's life was an unending war, a crucible of unrelenting tenacity and unyielding resolve in the face of impossible odds. Every battle he fought, bullet fired, enemiy eliminated, had been a prelude to this moment. Now, once more, he stood among the few who shielded Earth from her enemies. This was to be his final stand—a final battle where the outcome seemed inevitable. or was it?
Rated: M - English - Adventure/Sci-Fi - Chapters: 14 - Words: 144,131 - Reviews: 262 - Favs: 1,162 - Follows: 1,643 - Updated: 12/29/2024 - Published: 11/9/2020 - SPARTAN-B312/Noble Six, Tali'Zorah, Miranda L., Shepard
Noble and Not by Requiem of Life reviews
Six is half dead by the time Jun retrieves him from Reach. Neither of them are much better when slipspace malfunctions, and the end up in a world unlike their own. How will they be able to fight in another war they have no real stake in? Watch as the two living members of Noble Team fight to save another universe, but with more allies, friends, and more
Rated: M - English - Adventure/Romance - Chapters: 1 - Words: 5,289 - Reviews: 17 - Favs: 72 - Follows: 116 - Published: 12/17/2024 - Jun-A266/Noble Three, SPARTAN-B312/Noble Six, Miranda L., Shepard
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: 51 - Words: 1,080,047 - Reviews: 947 - Favs: 660 - Follows: 736 - Updated: 12/7/2024 - Published: 4/22/2016 - Master Chief/John-117, Cortana, Tali'Zorah, Shepard
Buzzard Buccaneer Radio by General Rage reviews
Boz the Buzzard hosts this pirate radio station, beaming out music to the Normandy, Fallen Serpent, Crusty Chorka and Ascendant Justice non-stop. BBR has only one mission, to keep Rock n Roll alive in the dark void of outer space. A companion story to "Remnants" that shows what happens while Shepard is off playing hero. Part of the Wormhole Chronicles Saga.
Rated: M - English - Humor/Sci-Fi - Chapters: 14 - Words: 107,720 - Reviews: 116 - Favs: 115 - Follows: 131 - Updated: 12/3/2024 - Published: 9/21/2016 - OC
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: 14 - Words: 63,078 - Reviews: 96 - Favs: 460 - Follows: 649 - Updated: 11/12/2024 - Published: 7/7/2016 - SPARTAN-B312/Noble Six
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: 13 - Follows: 16 - 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: 58 - Favs: 226 - Follows: 362 - Updated: 10/5/2024 - Published: 10/1/2024 - Master Chief/John-117, Garrus V., Tali'Zorah, Liara T'Soni
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: 14 - Words: 147,748 - Reviews: 602 - Favs: 1,691 - Follows: 2,230 - Updated: 9/1/2024 - Published: 2/11/2023 - Cortana, Councilor Valern, Councilor Tevos, Councilor Sparatus
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