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Knights of Sidonia & Halo Forward unto Dawn Crossover by Coolslick78 reviews
A new day dawns upon a parallel universe. The crew of Sidonia has colonized lem. It continues its journey through space searching for other soler systems but on an advanced mining mission, they discover a mysterious ship suspended inside an enormous ice asteroid. Apon searching the derelict ship they find its named "The UNSC Forward unto Dawn" with one crew onboard.
Crossover - Halo & Knights of Sidonia/シドニアの騎士 - Rated: K - English - Romance/Sci-Fi - Chapters: 3 - Words: 8,471 - Reviews: 3 - Favs: 3 - Follows: 6 - Updated: 37m - Published: 8/1 - Tanikaze N., Izana S., Yuhata M.
Halo Effect by kamilospl1312 reviews
What if UNSC replace System Allience from Mass Effect
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 1 - Words: 1,953 - Reviews: 5 - Favs: 8 - Follows: 14 - Published: 9h
Wrong Place, Right Time: A Hero's Story by DLTA-BOT reviews
The journey of a hero doesn't always start where they expect. It doesn't always happen to those who expect it. Damon was never interested in being what SPARTANs represent: an implacable force for good standing as humanity's shield. Like most other third-generation SPARTANs, the war took everything from him. All he wanted was to return the favor. Sometimes we don't get a choice.
Crossover - Fallout & Halo - Rated: T - English - Adventure/Sci-Fi - Chapters: 92 - Words: 1,081,520 - Reviews: 264 - Favs: 564 - Follows: 610 - Updated: 14h - Published: 9/29/2020 - Sole Survivor, Arthur Maxson, Shaun, OC
The Defenders of Humanity by Johnnieboy11 reviews
After the Battle on Mantle's Approach, the Master Chief and his companion AI, Cortana, find themselves in a strange time and place. To survive, the two and those that would come to follow them shall seek allegiance to Earth's Mightiest Heroes, in order to prepare for and counter a great threat to not just mankind, but the wider Universe.
Crossover - Halo & Avengers - Rated: M - English - Adventure/Sci-Fi - Chapters: 6 - Words: 23,742 - Reviews: 63 - Favs: 345 - Follows: 449 - Updated: 8/10 - Published: 3/12/2022 - [Cortana, Master Chief/John-117] Captain America/Steve R., Iron Man/Tony S.
If i could soar through the stars by Legotrix
as a shining star, we shine brightly and intense but in the end, we are destined to fall, in limbo we understand that time is an illusion born from the apprehension of beings with limited perception, and we now know that deities and heretics both lose, both comprehending their fault, atonement awaits both, to reap what they sow, but they had more of a past linked between, a record.
Crossover - Halo & Youjo Senki: Saga of Tanya the Evil - Rated: T - English - Sci-Fi - Chapters: 5 - Words: 6,617 - Favs: 4 - Follows: 7 - Published: 8/10 - C. Halsey, Tanya, OC, Viktoriya
A different journey by Dragon Cat84 reviews
The Master Chief is found by the Atlantis Expedition, how did the Master Chief end up in the early 21st Century and in the Pegasus Galaxy?
Crossover - Halo & Stargate: Atlantis - Rated: T - English - Chapters: 9 - Words: 35,356 - Reviews: 36 - Favs: 78 - Follows: 123 - Updated: 8/10 - Published: 3/24
Halo: Dark Stars-Death Dimension by Ash Maelstrom reviews
AU/FUSION FIC. Part one of a series! 2578. What do Marine stragglers, Sangheili mercenaries, and Banished raiders all have in common? They're about to have a really shitty 25th anniversary of the Great War's end. At the fringes of the battlefield, something is stirred by the rhythm of war and death...or was it already awake and waiting?
Crossover - Halo & Kantai Collection - Rated: T - English - Sci-Fi/Horror - Chapters: 8 - Words: 63,336 - Reviews: 9 - Favs: 12 - Follows: 19 - Updated: 8/10 - Published: 7/4
The Last Metroid by Two Dudes and a Dream reviews
Her Metroid DNA had taken over, resulting in a monstrous transformation. Unable to control her powers, when attempting to escape ZDR, her ship loses power due to her actions. She can't remember what happened after that, but now, all she sees is the blackness of space, left drifting, alone. In the distance, the broken body of a frigate is seen, with the name of Forward Unto Dawn…
Crossover - Metroid & Halo - Rated: M - English - Sci-Fi/Drama - Chapters: 45 - Words: 202,477 - Reviews: 429 - Favs: 484 - Follows: 610 - Updated: 8/9 - Published: 9/20/2022 - Samus A., Adam, Master Chief/John-117, Cortana
Justice League of Amazons: Halo by Angry lil' elf reviews
In a world where the rogue Amazon Aresia succeeds in her plan to wipe out all men on Earth, she has doomed humanity to extinction and a newly reformed Justice League must try and salvage the world. But hope is not lost and it comes in the form of a Spartan II Commando and his AI from another universe. His name: Master Chief Petty Officer John-117.
Crossover - Halo & Justice League - Rated: M - English - Sci-Fi/Adventure - Chapters: 20 - Words: 109,230 - Reviews: 373 - Favs: 1,193 - Follows: 1,219 - Updated: 8/9 - Published: 1/13/2016 - Master Chief/John-117, Diana of Themyscira/Wonder Woman, Shiera H./Shayera Hol/Hawkgirl
Shadow of Sol by SinArchbishop reviews
a UNSC Super Carrier went MIA after entering slip space and not arriving at its intended destination. Instead, it comes from a mysterious continental world. What intentions would this strange but similar-looking race have for the inhabitants of Terra? Would the UNSC have become xenophobic show mercy and help them or will they pull a Covenant? Fixed grammar issues in Ch.1 & 2.
Crossover - Halo & Arknights - Rated: M - English - Sci-Fi/Suspense - Chapters: 7 - Words: 18,796 - Reviews: 29 - Favs: 27 - Follows: 44 - Updated: 8/9 - Published: 7/26 - Kal'tsit
Echoes of Tomorrow by A Salty Archer reviews
From the ashes of war, humanity and its echoes—machines wrought in desperation—grapple with the remnants of purpose. As the stars bear witness to their struggle, the lines blur between creator and creation, each seeking salvation in the other's survival. In this crucible, they confront the ultimate question: can the spark of human spirit endure within the steel heart of a machine?
Crossover - Halo & Nier - Rated: M - English - Sci-Fi/Tragedy - Chapters: 2 - Words: 26,481 - Reviews: 17 - Favs: 70 - Follows: 98 - Updated: 8/8 - Published: 8/3 - Master Chief/John-117
Mass Effect: EXT SIGMA by IceFoxie reviews
The UNSC Infinity and her fleet escape the Didact's final bid to stop humanity from claiming the Mantle. By using the EXT SIGMA protocol, the fleet finds itself in uncharted space. Humans don't exist in this Mass Effect. How will the natives react to the UNSC refugees?
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Drama - Chapters: 6 - Words: 19,335 - Reviews: 20 - Favs: 125 - Follows: 164 - Updated: 8/7 - Published: 7/28
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.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 9 - Words: 41,377 - Reviews: 208 - Favs: 423 - Follows: 584 - Updated: 8/7 - Published: 2/6/2023
Divergent Warriors Rise Of The Hunter by BeeSamusnChief reviews
Alternate version of Different Galaxies Same Fighting Hearts. After destroying the first Halo, Master Chief on his way to warn Earth of the incoming Covenant invasion. On his Journey he accidentally enlists an extraordinary toddler to join him in the war against the Covenant.
Crossover - Halo & Metroid - Rated: M - English - Drama/Family - Chapters: 6 - Words: 157,988 - Reviews: 4 - Favs: 36 - Follows: 43 - Updated: 8/7 - Published: 9/8/2023 - Master Chief/John-117, Samus A.
hero of legends by Red phinex reviews
this is the story of the last legendary clans
Crossover - My Hero Academia/僕のヒーローアカデミア & Halo - Rated: M - English - Romance/Friendship - Chapters: 3 - Words: 4,416 - Reviews: 2 - Favs: 1 - Follows: 2 - Updated: 8/7 - Published: 8/1
Halo: RWBY Evolved by Danilyss reviews
After what was thought to be a simple mission, team RWBY wind up as stowaways aboard a phantom on the Seeker of Truth as it rendezvous with the Fleet of Particular Justice in order to await for the arrival of the Pillar of Autumn. Now caught in a war none of the girls would ever have imagined, they must fight alongside the Master Chief and the Marines against the Covenant.
Crossover - Halo & RWBY - Rated: T - English - Sci-Fi/Horror - Chapters: 6 - Words: 50,578 - Reviews: 47 - Favs: 120 - Follows: 178 - Updated: 8/7 - Published: 5/12/2023 - Master Chief/John-117, A. J. Johnson, Cortana, Team RWBY
HELLDIVERS:The Chance Encounter by Johnnieboy11 reviews
Super Earth is at war! In the Galactic West, the Automatons unleash their socialist horror upon the peoples of Super Earth. In the East, meanwhile, Terminids escaped from their cages bring forth destruction on our Colonies! Though, even amidst these trying times, hope remains! Newfound allies have entered the fight for Managed Democracy! Their name? The United Nations Space Command
Crossover - Helldivers & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 9 - Words: 36,153 - Reviews: 111 - Favs: 294 - Follows: 351 - Updated: 8/6 - Published: 3/2 - Master Chief/John-117, A. J. Johnson, Arbiter, SPARTAN-B312/Noble Six
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: 6 - Words: 38,115 - Reviews: 76 - Favs: 255 - Follows: 369 - Updated: 8/6 - Published: 2/20 - Master Chief/John-117, 2B, Cortana, 9S
Kingmaker by Temujin the Obliterator reviews
In the midst of a Cold War between the CIS and the UNSC. An ONI agent and an ARC trooper discover a more sinister plot beneath the surface and most work together to orchestrate a coup against the Chancellor.
Crossover - Star Wars & Halo - Rated: M - English - Adventure - Chapters: 5 - Words: 64,613 - Reviews: 5 - Favs: 14 - Follows: 25 - Updated: 8/6 - Published: 4/12
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)
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 3 - Words: 82,248 - Reviews: 44 - Favs: 105 - Follows: 134 - Updated: 8/6 - Published: 10/6/2023 - Master Chief/John-117, Shepard
A Phoenix's Rebellion by SPARTAN REAPER-9060 reviews
The Spirit Of Fire, a veteran ship of the Human-Covenant War but declared Lost With All Hands by the UNSC on February 10, 2534. Mysteriously the ship appeared over Earth but an Earth they never knew before. Rated M for my Language.
Crossover - Halo & Code Geass - Rated: M - English - Chapters: 6 - Words: 15,513 - Reviews: 11 - Favs: 83 - Follows: 100 - Updated: 8/4 - Published: 8/31/2021 - J. Cutter, Jerome-092, Lelouch L., Nunnally L.
Outlaws of the Verse (REVISED, August 2024) by Coltkit Prods. Omniva Verse reviews
In the World of "The Last Spartan" by "DinoJake" (Sequel/Spinoff/AU/Multi-Xover). 1000 years since the Reapers' defeat. People stopped aging (Supposedly caused by the wave that reprogrammed the Reapers). Kept sustainable by Replicators, Dyson Spheres, & Magic. Meanwhile: 3 Powers battle for the soul of the Galaxies: The Space Forces, Pirates, & The Outlaws. My OCs must choose sides
Crossover - Mass Effect & Halo - Rated: T - English - Sci-Fi/Family - Chapters: 11 - Words: 83,035 - Reviews: 4 - Favs: 16 - Follows: 13 - Updated: 8/4 - Published: 10/21/2023 - OC, OC, Master Chief/John-117, 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.
Crossover - Halo & Mass Effect - Rated: M - English - Humor/Sci-Fi - Chapters: 12 - Words: 93,530 - Reviews: 102 - Favs: 105 - Follows: 118 - Updated: 8/4 - Published: 9/21/2016 - OC
Halo: Shattered Fate by NightReadings.17 reviews
The Human Order Incineration Incident, the crisis that Chaldea has to resolve in order to restore mankind. Heroes had been summoned in an effort to assist in their endeavor, both from the past, as well as one from the future.
Crossover - Halo & Fate/stay night - Rated: M - English - Adventure/Fantasy - Chapters: 3 - Words: 14,228 - Reviews: 30 - Favs: 91 - Follows: 147 - Updated: 8/4 - Published: 7/26 - Master Chief/John-117, Mashu/Shielder, Ritsuka F.
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?
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 13 - Words: 171,604 - Reviews: 250 - Favs: 1,090 - Follows: 1,532 - Updated: 8/3 - Published: 11/9/2020 - SPARTAN-B312/Noble Six, Tali'Zorah, Miranda L., Shepard
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