Halo Crossovers
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Fangs and Plasma by werecat1 reviews
A Pelican carrying Red team leader Spartan-092 and a squad of Marines are swept into a wormhole by a covenant battleship, where they crash land in the middle ages of Castlevania, just as Elizabeth is about to be brought in witchcraft. Things are about to go down and not in the Dracula type of way either.
Crossover - Castlevania & Halo - Rated: M - English - Supernatural/Sci-Fi - Chapters: 6 - Words: 10,646 - Reviews: 33 - Favs: 58 - Follows: 73 - Updated: 10/31 - Published: 9/25/2019
HaloHobbit by werecat1 reviews
A ship is dragged through a wormhole and crash lands on middle earth by the lonely mountain, can the crew help Bilbo and the Dwarrow take back the mountain?
Crossover - Halo & Hobbit - Rated: T - English - Sci-Fi/Fantasy - Chapters: 15 - Words: 28,089 - Reviews: 15 - Favs: 38 - Follows: 59 - Updated: 10/31 - Published: 9/4/2019
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.
Crossover - Halo & Mass Effect - Rated: K+ - English - Sci-Fi - Chapters: 16 - Words: 33,119 - Reviews: 151 - Favs: 146 - Follows: 209 - Updated: 10/29 - Published: 9/8
Mjolnir Overlord by RamPluto reviews
The Master Chief arrives on Fevrith finding himself plunged into the midst of a conflict bathed in fantasy. Elves, witches, wyverns, and wizards, every fairy tale element is present in this new alien world. With no escape or contact back home in sight, will the Chief find a way back? Or will his journey to liberate a kingdom be the ultimate key he needs to find his humanity?
Crossover - Halo & Unicorn Overlord - Rated: T - English - Fantasy/Sci-Fi - Chapters: 2 - Words: 10,860 - Reviews: 12 - Favs: 47 - Follows: 60 - Updated: 10/29 - Published: 9/8 - Master Chief/John-117, Rosalinde, Eltolinde, Alain
Halo: Remnants of Reach by noahcook420 reviews
Commander Cook, Leader of the Raiders, was not having a great day. Waking up to the Covenant at New Alexandria's doorstep, Him and whatever hodgepodge of ships that followed him from Reach make a blind Slipspace jump into the unknown...and right towards the edge of the Remnant system. (Set 3 years before the anime, but will mainly take place during Beacon. No SMUT FFS.)
Crossover - Halo & RWBY - Rated: M - English - Sci-Fi/Mystery - Chapters: 7 - Words: 13,842 - Reviews: 30 - Favs: 35 - Follows: 50 - Updated: 10/29 - Published: 10/10 - SPARTAN-B312/Noble Six, OC, Team RWBY, Team JNPR
The Path of the Savior by Johnnieboy11 reviews
Trapped in another variation of the Milky Way Galaxy after the Fall of Cadia caused the opening of the Cicatrix Maledictum, a minor Eldar Craftworld finds itself stuck in a war between a humanity on the brink of extinction and an alien alliance hell-bent on ending them and the Humans. Unlikely alliances form, friendships are built and the face of the Galaxy will forever be changed
Crossover - Warhammer & Halo - Rated: M - English - Sci-Fi/Adventure - Chapters: 16 - Words: 62,598 - Reviews: 229 - Favs: 769 - Follows: 999 - Updated: 10/27 - Published: 8/12/2019 - Eldar, Master Chief/John-117, A. J. Johnson, OC
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: 5 - Words: 53,708 - Reviews: 76 - Favs: 197 - Follows: 242 - Updated: 10/27 - Published: 12/31/2023 - Daisy-023
Empires Unite! Milky Way by SapphireDawn11709 reviews
When the SGC Destroys the Quantum Mirror after the incident were Doctor Carter and Major Kawasaki appear in Area 51a ripple was sent across the multiverse. When this ripple hit a Forerunner portal chaos ensues as fleets from three universe appear in the Milky Way. Starship Troopers, Mass Effect, Halo Stargate
Crossover - Stargate: SG-1 & Halo - Rated: M - English - Sci-Fi - Chapters: 8 - Words: 31,388 - Reviews: 100 - Favs: 281 - Follows: 352 - Updated: 10/26 - Published: 6/24/2019 - T. Lasky, S. Carter
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: 7 - Words: 40,564 - Reviews: 77 - Favs: 210 - Follows: 307 - Updated: 10/26 - Published: 7/26 - Master Chief/John-117, Mashu/Shielder, Ritsuka F.
Halo: Fallen Stars (A Halo x Warcraft Crossover) by DarkNovaExtremia reviews
2537. The UNSC tries to find a new home for humanity to settle in, one away from the Covenant's reach. An old Punic-class supercarrier was chosen to do so, but a Covenant battle group pursues her relentlessly, until a black hole ends their chase. As both sides stumble in a new universe, the question remains: Will they bring their war to Azeroth? Or will they find a new beginning?
Crossover - Warcraft & Halo - Rated: T - English - Sci-Fi/Fantasy - Chapters: 2 - Words: 22,171 - Reviews: 10 - Favs: 35 - Follows: 53 - Updated: 10/26 - Published: 6/28 - Arthas Menethil, Jaina Proudmoore, Tyrande Whisperwind, OC
The Sensei from Noble team by The AbsoluteToe reviews
When Noble 6 became a Spartan, he had sworn to eliminate the enemies of man and to protect his fellow man at any cost. Even in a city full of bulletproof schoolgirls, that oath has not changed. As a teacher to those girls, he was sworn to protecting the ideals, dreams, and life’s of his students. For it is his role as a Teacher, as an Adult, as a Spartan.
Crossover - Blue Archive & Halo - Rated: T - English - Sci-Fi - Chapters: 1 - Words: 1,502 - Reviews: 2 - Favs: 15 - Follows: 24 - Published: 10/25 - SPARTAN-B312/Noble Six
Operation: WASTELAND by Spartan-049 reviews
Whilst exploring the depths of Gamma Halo, a lone Spartan inexplicably finds himself transported to an irradiated wasteland on a planet that shouldn't have one; Earth. Hoping to find some answers he enlists the help of a local courier already on a quest of his own to find something. (Under revision)
Crossover - Fallout & Halo - Rated: T - English - Adventure/Western - Chapters: 3 - Words: 11,265 - Reviews: 14 - Favs: 37 - Follows: 53 - Updated: 10/23 - Published: 2/2
Shadows of the Empire: The Unseen War by The Robloxians reviews
In the far reaches of uncharted space, the UNSC Vigilance stumbles upon a mysterious, disabled starship—an enormous Star Destroyer, unlike anything the UNSC has ever encountered. The ship is barely functional, with minimal power and ten life signs aboard. These life forms appear human, but they are part of a mysterious force calling themselves the Imperial Navy.
Crossover - Halo & Star Wars - Rated: M - English - Suspense/Sci-Fi - Chapters: 4 - Words: 5,435 - Reviews: 6 - Favs: 7 - Follows: 23 - Updated: 10/23 - Published: 10/20
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: 10 - Words: 107,886 - Reviews: 399 - Favs: 530 - Follows: 625 - Updated: 10/22 - Published: 7/3/2023 - SPARTAN-B312/Noble Six, Elena G., Stefan S., Bonnie B.
Fleet of the Homeward Bound: Book two by Sora with an S reviews
Spirit of Fire, Hyperion, Jupiter II, Archangel and a few Firestorms just want to know where they are and how to get home. Also, they want to know why they're all girls in space now.
Crossover - StarCraft & Halo - Rated: T - English - Chapters: 4 - Words: 29,910 - Reviews: 16 - Favs: 35 - Follows: 53 - Updated: 10/21 - Published: 8/9/2023
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: 6 - Words: 5,741 - Reviews: 2 - Favs: 6 - Follows: 8 - Updated: 10/20 - Published: 4/19
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.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 1 - Words: 10,797 - Reviews: 2 - Favs: 9 - Follows: 12 - Published: 10/20 - O'Brien, Cal-141
Records From the Void (Halo X Arpeggio) by WO-Class reviews
The Fleet of Fog. Legendary figures, the last of those who bore Shipsouls, vanished into the mists of history, to be forgotten, their service drowned in an endless sea. Until a single facility buried underneath Mars emits a ping that the nascent UNSC traces. Original takes on characters from KanColle and Azur Lane, this story incorporates elements from both and is heavy.
Crossover - Halo & Arpeggio of Blue Steel/蒼き鋼のアルペジオ - Rated: M - English - Sci-Fi/Horror - Chapters: 13 - Words: 66,017 - Reviews: 2 - Favs: 15 - Follows: 15 - Updated: 10/19 - Published: 8/16 - Iona
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: 16 - Words: 120,682 - Reviews: 125 - Favs: 253 - Follows: 303 - Updated: 10/18 - Published: 8/24/2023 - Master Chief/John-117, Arbiter, 343 Guilty Spark, C. Halsey
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: 9 - Words: 54,984 - Reviews: 26 - Favs: 59 - Follows: 75 - Updated: 10/17 - Published: 8/17/2022 - Master Chief/John-117, Cortana, KOS-MOS, T-elos
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: 24 - Words: 195,922 - Reviews: 1157 - Favs: 2,202 - Follows: 2,747 - Updated: 10/16 - Published: 7/28/2018 - Anakin Skywalker, Obi-Wan K., Master Chief/John-117, Cortana
The Galaxy is Flood, Not Food by JacksonTheFox reviews
It is the 42nd Millennium. The Imperium spans the galaxy, yet it has been split in two by Chaos after the opening of the Great Rift. Yet, with the tear in reality, something unexpected emerged. A man, born in another time, arrives not as himself, but as a spore of the most terrible of parasites. The Flood has come to Warhammer 40k.
Crossover - Warhammer & Halo - Rated: T - English - Sci-Fi/Horror - Chapters: 67 - Words: 256,635 - Reviews: 61 - Favs: 271 - Follows: 295 - Updated: 10/16 - Published: 9/10 - Chaos Space Marines, Daemons, Inquisition, Adeptus Mechanicus
Starting a new faction in the Halo universe with StarCraft Technology by CaptainKriss S5-SIERRA-117 reviews
Jean Razak just a regular normal young adult with a balanced lifestyle between gaming,study and work. Somehow out of nowhere he was transported to another planet with similar environments to earth. He gained power called [SYSTEM] to summon the StarCraft Terran faction unit. Can he survive and return to his original home
Crossover - Halo & StarCraft - Rated: T - English - Sci-Fi/Parody - Chapters: 5 - Words: 15,111 - Reviews: 8 - Favs: 76 - Follows: 93 - Updated: 10/16 - Published: 3/29
Jolt of Metal by Lighting wolf knight reviews
Two breeds of soldiers were bred for war and both with one singular purpose. Rated T for violence, death, and profanity.
Crossover - Halo & Star Wars: The Clone Wars - Rated: T - English - Sci-Fi/Adventure - Chapters: 2 - Words: 3,082 - Reviews: 2 - Favs: 9 - Follows: 18 - Updated: 10/14 - Published: 6/7/2022 - OC, Grace-093, General Grevious, Clones
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: 12 - Words: 80,368 - Reviews: 130 - Favs: 325 - Follows: 401 - Updated: 10/14 - Published: 2/16/2022 - [Samuel-034, Nejire Hado] Mirio T., T. Amajiki
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