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War of the Hearts by World Archivist reviews
The Human-Covenant war had left an undeniable scar on the galaxy. Now in the year 2553, a new enemy shall appear, and a new war shall begin, one with origins in a time before the Halo Array.
Crossover - Halo & Kingdom Hearts - Rated: M - English - Sci-Fi - Chapters: 3 - Words: 3,090 - Reviews: 1 - Favs: 5 - Follows: 7 - Updated: 6/21 - Published: 4/19
Battle Group Zeta (MCUHalo Crossover) by Sammy-1000 reviews
An UNSC Fleet arrives in the MCU. How will the Avengers and other Heroes react to a Humanity who doesn't take any shit from the Aliens. Read and Find out! Read Full Summary in the First Page. Since Fanfiction doesn't allow much words. Warning:- Blood and Violence.
Crossover - Halo & Avengers - Rated: M - English - Sci-Fi/Adventure - Chapters: 3 - Words: 12,215 - Reviews: 16 - Favs: 71 - Follows: 96 - Updated: 6/20 - Published: 6/8 - J. Cutter, Iron Man/Tony S., Pepper P., Captain America/Steve R.
Sins Of A Galactic Empire Reborn by zzzxxc1 reviews
When the Milky Way is revealed to the universe at large by a derelict CIS warship, the UEG are forced to become members of the transgalactic community, but its existence is soon threatened by the decline of the Republic, and the rise of an Empire. Adopted from SpaceCowboy2013.
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi - Chapters: 23 - Words: 174,272 - Reviews: 1117 - Favs: 2,119 - Follows: 2,670 - Updated: 6/20 - Published: 7/28/2018 - Anakin Skywalker, Obi-Wan K., Master Chief/John-117, Cortana
The hyper-lethal driver by Ranger2287 reviews
After a failed slip-space jump, The Chief and Cortana find themselves in the world of XC2 but end up in the land of Morytha. And his entry does not go un-noticed by the people of Alrest, in fact it leaves quite the impact.
Crossover - Halo & Xenoblade Chronicles 2 - Rated: M - English - Adventure - Chapters: 6 - Words: 26,587 - Reviews: 10 - Favs: 29 - Follows: 43 - Updated: 6/19 - Published: 8/17/2022 - Master Chief/John-117, Cortana
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)
Crossover - Halo & Mass Effect - Rated: K+ - English - Sci-Fi - Chapters: 4 - Words: 31,484 - Reviews: 43 - Favs: 235 - Follows: 335 - Updated: 6/18 - Published: 10/9/2023 - P. Cole, OC, Admiral Hackett, Shepard
BattleTech: Combat Evolved - Definitive Edition by IX404 reviews
We all know the tale. The SLDF under Aleksandr Kerensky's command leaves the Inner Sphere forever, before evolving into the Clans following Operation KLONDIKE. What if this was not the case? What if the entire Exodus fleet suffered a misjump that propelled them into another universe, one where Humanity will reclaim an ancient inheritance? This is the story of that possibility.
Crossover - Mechwarrior/Battletech & Halo - Rated: T - English - Sci-Fi/Drama - Chapters: 14 - Words: 110,076 - Reviews: 108 - Favs: 217 - Follows: 265 - Updated: 6/16 - Published: 8/24/2023 - Master Chief/John-117, Arbiter, 343 Guilty Spark, C. Halsey
The Spartan Hero by SilverExcel115 reviews
The mission's changed, they always do. Sam wasn't expecting entering another world with no possible way back, but his missions objectives remain the same, "Protect humanity, no matter the cost." At the same time, he will be forced to come to terms with his new home and learn what it means to be a hero in this new world. At least he doesn't have to do it alone. Sam and Big 3, C-2A
Crossover - Halo & My Hero Academia/僕のヒーローアカデミア - Rated: T - English - Sci-Fi/Drama - Chapters: 11 - Words: 65,048 - Reviews: 111 - Favs: 291 - Follows: 363 - Updated: 6/16 - Published: 2/16/2022 - Samuel-034, Mirio T., T. Amajiki, Nejire Hado
A Gold Flower by CplMax43 reviews
A flower cannot blossom without sunshine. And where flowers boom, so can hope.
Crossover - Warhammer & Halo - Rated: M - English - Sci-Fi/Adventure - Chapters: 3 - Words: 29,742 - Reviews: 49 - Favs: 134 - Follows: 174 - Updated: 6/16 - Published: 12/31/2023 - Daisy-023
The Noble Diaries by SSJ Lone Wolf reviews
Finding himself back in time to the early twenty-first century, Six thought that attending Highschool would be a breeze compared to fighting the Covenant and Insurrectionists. But between Vampires, Werewolves, doublegangers, and countless other supernatural creatures and who knows what else, he finds that his troubles are just starting.
Crossover - Halo & Vampire Diaries - Rated: M - English - Chapters: 8 - Words: 76,093 - Reviews: 272 - Favs: 435 - Follows: 515 - Updated: 6/14 - Published: 7/3/2023 - SPARTAN-B312/Noble Six, Elena G., Stefan S., Bonnie B.
Spartan of Tristain by Dan Is Here reviews
Louise Françoise Le Blanc de La Vallière, a student at the Tristain Academy of Magic, performs a summoning ritual that goes horribly wrong, catapulting her into the universe of Halo. Captured by ONI and forced into the Spartan-II program, she becomes Spartan Triple Zero. As a super-soldier fighting the Covenant, she longs for home while navigating relentless battles and her past.
Crossover - Halo & Familiar of Zero - Rated: T - English - Sci-Fi/Angst - Chapters: 1 - Words: 3,454 - Reviews: 8 - Favs: 55 - Follows: 76 - Published: 6/13 - Louise
The Reclaimer of Mandalore by UNSC indomitable reviews
Having been awoken by his faithful companion. The Master Chief and Cortana find themselves in an unknown galaxy. Knowing the only way to survive is to remain under the radar. But in a galaxy gripped by war, such a thing was never going to be easy. As the Chief try's to up hold the status quo in the ever changing world of Mandalore, as the galaxy slowly torn apart around them.
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi - Chapters: 23 - Words: 138,443 - Reviews: 499 - Favs: 1,477 - Follows: 1,922 - Updated: 6/13 - Published: 11/25/2020 - OC, Master Chief/John-117, Cortana
Everything is Fair in Love and War by VastErimos reviews
So you died? Nailed it. Here try again for my entertainment. OPMC, Waifu Catalog fic, if you have a problem with either of these that’s fine. Currently in Stargate. Temporarily in Miraculous tales of Ladybug and Chat Noir.
Crossover - Halo & X-overs - Rated: M - English - Sci-Fi/Friendship - Chapters: 16 - Words: 62,393 - Reviews: 67 - Favs: 136 - Follows: 154 - Updated: 6/11 - Published: 8/9/2022 - Fred-104, Serina
Harry Potter got trained by Driver1985 reviews
On the night Harry would have been dropped off by his Aunt, Dumbledore had someone else in mind. What if Harry was taken in by other strong people and they even decided to train him? Trained to be a Warrior by Wolves and the UNSC, he will change the world. OP, smart, trained Harry, small harem double cross with Witcher and Halo
Crossover - Harry Potter & Halo - Rated: M - English - Fantasy/Sci-Fi - Chapters: 95 - Words: 520,548 - Reviews: 426 - Favs: 892 - Follows: 1,050 - Updated: 6/11 - Published: 9/30/2021 - [Harry P., Hermione G., Daphne G.] Master Chief/John-117
Halo: Universal Vortex by Legend of Flashfox reviews
With the rush of the firing of the rings errors occurred. More species come into play and humanity no longer started on Earth alone. The planet Elemental is here with humans who are different from Earth. Now Naruto needs to navigate this war torn galaxy. Alive preferably. Pairings maybe Harem. NarutoXHalo world merged with bits of others like Star Wars and Mass Effect. Maybe more.
Crossover - Halo & Naruto - Rated: M - English - Chapters: 68 - Words: 151,342 - Reviews: 285 - Favs: 423 - Follows: 491 - Updated: 6/9 - Published: 1/10/2022 - C. Halsey, Naruto U.
Total Corruption by Two Dudes and a Dream reviews
Having lost everything in her fight against Phazon, she'd gone to its Homeworld to bring an end to it. She had not been prepared to succumb to its effects on her body, but her will could not be ignored. While her body had been changed, her will remained iron strong until the end. But in a surprise twist, she's left abandoned in the gap between dimensions, with no hope of escape…
Crossover - Metroid & Halo - Rated: M - English - Sci-Fi - Chapters: 1 - Words: 4,871 - Reviews: 13 - Favs: 42 - Follows: 60 - Published: 6/7 - Samus A., Master Chief/John-117
Spartans Don't Play Games by You will not find me reviews
The Tourney of Harrenhall was the greatest of its kind in Westeros. It was a grand show of the power of house Whent that drew the attention of all seven kingdoms. However, the Westerlands have arrived with strange new allies. Great warriors who bear the sigil of an eagle with arrows and lightning in its claws. Who are these new allies, and what do they mean for Westeros?
Crossover - Halo & Game of Thrones - Rated: T - English - Fantasy/Sci-Fi - Chapters: 57 - Words: 238,069 - Reviews: 2107 - Favs: 1,970 - Follows: 2,355 - Updated: 6/7 - Published: 11/17/2020 - Kurt-051, Lucy-B091, Tom-B292, Tywin L.
HALO: All the Stars in the Sky: Information Files by Spartan-076A reviews
Information Files for my Halo/Stargate fanfiction I have in development. Rated M for intense scenes of combat and violence portrayed in the main story.
Crossover - Stargate: SG-1 & Halo - Rated: M - English - Sci-Fi - Chapters: 6 - Words: 1,707 - Reviews: 9 - Favs: 11 - Follows: 13 - Updated: 6/7 - Published: 3/23
Nuevo Mundo, Mismos Problemas (RWBY Halo Crossover) by ZenthicAlpha115
Línea Alternativa de Si Fuera Tan Fácil. Después de sacrificarse para salvar a sus aliados, los SCDO Ethan y Svensdottir son llevados a otro planeta donde no tienen contacto con la UNSC y tendrán que ingeniárselas para sobrevivir en este nuevo mundo. Donde descubrirán la gran fachada que está llevando a la población de Remnant a una guerra silenciosa.
Crossover - Halo & RWBY - Rated: T - Spanish - Sci-Fi/Fantasy - Chapters: 20 - Words: 79,672 - Favs: 3 - Follows: 3 - Published: 6/6 - Jerome-092, Ruby R., Ozpin, Team RWBY
Halo: The War on Sera by SwedishEmperorThe1 reviews
After the final battle at the Ark, the Master Chief and his friends finds themselves on the obscure planet of Sera. There they've to team up with Sergeant Marcus Fenix and his Delta Squad to once again save humanity from enemies desiring its extermination, as well uncover hidden conspiracies that could determine the very fate of the universe.
Crossover - Halo & Gears of War - Rated: T - English - Sci-Fi/Adventure - Chapters: 6 - Words: 64,966 - Reviews: 71 - Favs: 169 - Follows: 197 - Updated: 6/6 - Published: 12/26/2015 - Master Chief/John-117, Marcus F.
Serenity by Space-Dweeb reviews
2542. Humanity lost the war against the Covenant, and has been assimilated into the galaxy-spanning conglomerate. John-117 and his crew, formerly humanity's greatest champions, were forced into a life of crime in order to survive. Aboard the Firefly-class ship Serenity, they travel the galaxy with one mission: get a ship, get a crew, keep flying.
Crossover - Halo & Firefly - Rated: T - English - Sci-Fi/Western - Chapters: 12 - Words: 60,253 - Reviews: 14 - Favs: 25 - Follows: 38 - Updated: 6/5 - Published: 8/14/2022 - [Master Chief/John-117, Cortana] [Fred-104, Kelly-087]
Nier: Great Journey by RamPluto reviews
Finding herself on an unknown ringworld, alone save for her Pod, 2B finds herself thrusted into the middle of an unknown and seemingly intergalactic conflict. With the aid of the Master Chief, 2B will find herself dealing with two worlds, one where Humanity is extinct and the other where war is a constant ever looming threat, to all of mankind and existence itself.
Crossover - Halo & Nier - Rated: T - English - Sci-Fi/Adventure - Chapters: 5 - Words: 31,134 - Reviews: 65 - Favs: 226 - Follows: 333 - Updated: 6/4 - Published: 2/20 - Master Chief/John-117, 2B, Cortana, 9S
Noble 6: Ghost of Reach by thermalsnipern7 reviews
The war against the Covenant ended, but something else pressed humanity to the verge of extinction like they never did. Now, Noble 6 rises again to defend humanity like he had done before, and make humanity into something strong like it was so long ago. The one thing his enemies keep wondering is why they hear boss music.
Crossover - Halo & Destiny - Rated: M - English - Sci-Fi/Romance - Chapters: 14 - Words: 69,788 - Reviews: 43 - Favs: 150 - Follows: 181 - Updated: 6/4 - Published: 7/31/2022 - [SPARTAN-B312/Noble Six, Fallen]
Mankind and Hope: A Halo and Star Wars Collection by Mayflower073 reviews
A collection of short stories in a merged universe for Halo and Star Wars during the last year of the Clone War and the later years of the Insurrection. The United Nations (AU) discovers a galactic community ravaged by civil war, within which a charismatic envoy beseeches them to choose a side. Experience the fanfic that got me into grad school! (Cross-posted from AO3, same name)
Crossover - Star Wars & Halo - Rated: M - English - Sci-Fi/Tragedy - Chapters: 18 - Words: 180,037 - Reviews: 15 - Favs: 45 - Follows: 43 - Updated: 6/4 - Published: 4/14 - Obi-Wan K., Count Dooku, Master Chief/John-117, J. Cutter - Complete
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.
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 43 - Words: 910,922 - Reviews: 854 - Favs: 517 - Follows: 592 - Updated: 6/2 - Published: 4/22/2016 - Master Chief/John-117, Cortana, Tali'Zorah, 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)
Crossover - Halo & Mass Effect - Rated: M - English - Adventure - Chapters: 24 - Words: 88,237 - Reviews: 163 - Favs: 571 - Follows: 850 - Updated: 6/2 - Published: 7/8/2022 - Rookie, Shepard
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