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Only In Death Does Duty End by Cypher1597 reviews
Spartans are the protectors of humanity. Headhunters are the sword of humanity. Both are required to fight for their species unto their dying breath. However, when death finally comes is that duty maintained? Does it continue as long as the mind can remember it? Regardless of the answer, a Headhunter must find a way to continue his duties. Even if he is no longer human.
Crossover - Halo & High School DxD/ハイスクールD×D - Rated: M - English - Suspense - Chapters: 18 - Words: 108,879 - Reviews: 250 - Favs: 455 - Follows: 611 - Updated: 7h - Published: 6/29/2021 - OC, Sirzechs L., Serafall L., Grayfia L.
Hyper Lethal Pups by TheManThatWalksTheAbyss115 reviews
A little short story about the little ones of a certain Hyper Lethal Vector
Crossover - Halo & RWBY - Rated: T - English - Family/Hurt/Comfort - Chapters: 1 - Words: 2,415 - Reviews: 9 - Favs: 10 - Follows: 13 - Published: 7h
Sekirei: The Ghost Of Reach by Helghast honored guard reviews
The Lonewolf has survived and made it off reach . Now he finds himself trapped in another world ,another time and another conflict up against a madman forcing a race of super powered aliens to fight to the death to bring a new age of the gods . (Six and Harem)
Crossover - Halo & Sekirei - Rated: M - English - Sci-Fi/Romance - Chapters: 3 - Words: 24,989 - Reviews: 13 - Favs: 47 - Follows: 54 - Updated: 12h - Published: 1/28
Mass effect: the Jaded ones by Ray SK reviews
A UNSC Human-covenant war-era battle group led by a Punic class supercarrier is introduced to a new galaxy. One where people are xenophilic, use to times of peace and harmony, and against disrupting the Status Quo. What will an extremely aggressive xenophobic and battle-hardened human faction add to the mix? and will their addition change the future of this galaxy. (No Spartans)
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Humor - Chapters: 2 - Words: 8,237 - Reviews: 19 - Favs: 45 - Follows: 66 - Updated: 17h - Published: 2/6 - E. Buck, OC
Immortal Galaxies by Lighting wolf knight reviews
An escape from an overrun galaxy lands them in another galaxy? What does being the biggest fish in the water gain you in a world without heavy hitters? Rated T for violence, death, and profanity.
Crossover - Halo & Mass Effect - Rated: T - English - Romance/Adventure - Chapters: 3 - Words: 4,777 - Reviews: 7 - Favs: 58 - Follows: 86 - Updated: 20h - Published: 11/11/2021 - [OC, Vetra N.] T. Hood
The Canadian Commonwealth by Vassago1991 reviews
In the vast multiverse event can happen that should never happen this is the story of one such universe with an event that should have never happened.
Crossover - Halo & Mass Effect - Rated: M - English - Chapters: 1 - Words: 3,336 - Reviews: 3 - Favs: 7 - Follows: 11 - Published: 2/24
The Guiding Fire by UNSC indomitable reviews
A Commander striped of authority. The world divide and falling. Last fading light. Hope lays in Spirit and might. As those with the fire lay dying. All must stand fast in the face howling night.
Crossover - Halo & Azur Lane/碧蓝航线 - Rated: T - English - Sci-Fi/Fantasy - Chapters: 8 - Words: 42,949 - Reviews: 62 - Favs: 117 - Follows: 177 - Updated: 2/24 - Published: 7/22/2020 - J. Cutter, OC
Different Realities by Blue-Jay1009 reviews
As the Autobots and Decepticon stumble across a strange device that is of unknown origin. As one of their human friends accidentally activates the device it transports the two wagering factions and humans into a different universe where they landed on a dead planet that belongs to an advanced humanity a few years prior to the war with the covenant been over.
Crossover - Transformers/Beast Wars & Halo - Rated: T - English - Drama/Adventure - Chapters: 4 - Words: 5,453 - Reviews: 5 - Favs: 37 - Follows: 46 - Updated: 2/24 - Published: 1/4 - Bumblebee, Optimus Prime, Master Chief/John-117, Cortana
Flames of War by Lighting wolf knight reviews
Space Marines and Spartans weren't so different... Especially for war. Rated T for violence, death, and profanity. Doesn't entirely follow games. The story is either about Salamander Chapter or Space Wolves. Black Templar story to follow. The first few reviews for Salamander or Space Wolves will be set the choice. The next chapter is to start work on Friday after reviews.
Crossover - Warhammer & Halo - Rated: T - English - Romance/Adventure - Chapters: 2 - Words: 3,720 - Reviews: 2 - Favs: 8 - Follows: 9 - Updated: 2/24 - Published: 1/28 - [OC, Linda-058] Space Marines, Kelly-087
HALO: A Different Kind Of Karry by Karry-Verse reviews
After Fighting For Years In The UNSC/COVENANT War, Spartan 117, Barry, THE Master Chief. Is Thrust Into Yet Another Conflict, However This Time It Is With The Banished. During One Of His Biggest Battles Yet, He Is Sent Falling Into Another Universe, One Where Heroes And The Impossible Are Everyday Factors Of Life. Even Across The Multiverse, Soulmates Can Find One Another.
Crossover - Halo & Supergirl - Rated: T - English - Romance/Adventure - Chapters: 5 - Words: 5,728 - Reviews: 1 - Favs: 9 - Follows: 16 - Updated: 2/24 - Published: 2/9 - Atriox, C. Halsey, Kara/Kara-El, OC
Why use Spartans when you have Tactical Dolls? by Yui Yuria reviews
The Spartans hated them, they were A.I. but competing with the Spartans. The ODST that knew about them were terrified of them, and even ONI did not really feel comfortable with them. Tactical Dolls were not normal A.I. as far as the UNSC understood it, certainly their programming had removed rampancy from UNSC A.I. but these A.I. had bodies. (Prologue has been totally rewritten)
Crossover - Halo & Girls' Frontline/少女前线 - Rated: M - English - Sci-Fi - Chapters: 4 - Words: 8,257 - Reviews: 15 - Favs: 18 - Follows: 25 - Updated: 2/24 - Published: 9/12/2021 - C. Halsey, Kalina
Halo: Down Fall Of The Gods by Reaper Eye Fuck ONI reviews
It is said that when an Era ends it usually ends with either Man almost dying or a lot of civilizations crumbling this is that story...if it was told by a Emo kid but no this story is told through "Fuck you and fuck your empire" "Run Xenos run for man marches"-Unknow soldier as he was shooting a Jaffa in the face with a shotgun.
Crossover - Stargate: SG-1 & Halo - Rated: M - English - Sci-Fi/Humor - Chapters: 9 - Words: 18,464 - Reviews: 38 - Favs: 60 - Follows: 77 - Updated: 2/24 - Published: 12/19/2021 - Ra, Thor, Master Chief/John-117, A. J. Johnson
Machines and Might by Strategic.Ignorance reviews
Eight years before the USJ Incident, the Hero Public Safety Commission learns of the Meta Liberation Army. Doubting the current heroes ability to stop this threat, the Commission sees this as the perfect opportunity to usher in a new age of heroes. The first step is the kidnapping of one hundred kids. Among them is Izuku Midoriya. Moderate AU.
Crossover - Halo & My Hero Academia/僕のヒーローアカデミア - Rated: T - English - Sci-Fi/Friendship - Chapters: 13 - Words: 38,931 - Reviews: 60 - Favs: 147 - Follows: 216 - Updated: 2/24 - Published: 12/1/2021 - William-043, Izuku M., Hitoshi S., Mei H.
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: T - English - Adventure/Sci-Fi - Chapters: 5 - Words: 45,863 - Reviews: 70 - Favs: 419 - Follows: 620 - Updated: 2/23 - Published: 11/9/2020 - SPARTAN-B312/Noble Six, Tali'Zorah, Miranda L., Shepard
Synchrons of Redemption by NoXXiMillioN reviews
The Master Builder of the Forerunner Ecumene, alive. Mind and Geas kept deep within the Domain by a Precursor. As such, humanity has gone beyond their own stars, to Path Kethona, the Star Wars galaxy. He wrestles with his past, his horrible crimes attempting to find peace, reconciliation. Faber-of-Will-and-Might destroyed the galaxy, and now will have to save them both.
Crossover - Halo & Star Wars - Rated: M - English - Poetry/Sci-Fi - Chapters: 9 - Words: 26,156 - Reviews: 21 - Favs: 45 - Follows: 55 - Updated: 2/23 - Published: 5/26/2021 - Librarian, Barriss O., E. Palpatine
The Lone Wolf by Lighting wolf knight reviews
He had met one who completed him and yet? She was a rabbit and he a wolf against a galaxy ruled by animals. Kelly x Space Marine. Worked on weekly. Rated T for death, profanity, and combat. Does NOT follow Warhammer or Halo Lore. Poll for White Scar or Iron Fist story set.
Crossover - Warhammer & Halo - Rated: T - English - Adventure/Sci-Fi - Chapters: 3 - Words: 5,164 - Reviews: 6 - Favs: 9 - Follows: 12 - Updated: 2/23 - Published: 1/31 - [Space Marines, Kelly-087] Orks, Atriox
No Gods, Nor Masters by Johnnieboy11 reviews
After the pyrrhic victory of the Human-Covenant War, the Covenant was split into many warring factions vying for the power of old. The UNSC was left, bloodied, but as the sole power in the Milky Way for now. After an incredible discovery within a set of Forerunner Ruins, an Exploration Fleet with Doctor Halsey at its head is sent out. What they find will change everything.
Crossover - Halo & Gate - Jietai Kare no Chi nite, Kaku Tatakeri - Rated: T - English - Adventure/Sci-Fi - Chapters: 9 - Words: 36,220 - Reviews: 130 - Favs: 275 - Follows: 387 - Updated: 2/23 - Published: 1/28 - C. Halsey, OC, Itami, Tyuule
Digimon War Game by riven-del reviews
AU. Reach has fallen. A Digimon Tamer was lucky to get off planet, but she didn't expect to get ejected into an UNSC ship fleeing the system to go on their own mission. Can she survive this adventure in one piece?
Crossover - Digimon & Halo - Rated: T - English - Adventure/Hurt/Comfort - Chapters: 11 - Words: 13,175 - Reviews: 8 - Favs: 7 - Follows: 12 - Updated: 2/23 - Published: 12/6/2021 - OC, Herissmon, J. Keyes
The Way by Twisted Fate MK 2 reviews
Ever since the fall of the Covenant, the Arbiter has sought one thing. A path to redeem himself of his past sins. Waking up on a strange world does nothing to change that goal. Though it does add some complications to it, in the form of the bestial Grimm and strange children. But if the gods wish him here, then he shall see their desires through.
Crossover - Halo & RWBY - Rated: T - English - Adventure/Mystery - Chapters: 43 - Words: 190,601 - Reviews: 632 - Favs: 883 - Follows: 1,140 - Updated: 2/23 - Published: 12/27/2019 - Master Chief/John-117, Arbiter, Ruby R., Weiss S.
Harry Potter got trained by Driver1985 reviews
It begins like many story's get started. But there is always a twist in this dark times. How will the people handle a "Boy who lived", who is trained by the Wolves and Spartans? Update for the Summary: i decided how the pairings will work, hope you like it
Crossover - Harry Potter & Halo - Rated: T - English - Fantasy/Sci-Fi - Chapters: 22 - Words: 97,569 - Reviews: 41 - Favs: 170 - Follows: 210 - Updated: 2/23 - Published: 9/30/2021 - [Harry P., Hermione G., Daphne G.] Master Chief/John-117
Semper Vigiles by Cypher1597 reviews
Headhunter, a program propagated by the Office of Naval Intelligence. After a final act of defiance against the Covenant, a Headhunter must find his place in a city ruled by corporate greed, bloodthirsty mercenaries, and roaming bands of vicious scavengers. It is the perfect hunting ground for one of ONI's most accomplished killers. Semper Vigiles - Always Vigilant.
Crossover - Halo & Cyberpunk 2077 - Rated: M - English - Adventure - Chapters: 55 - Words: 385,251 - Reviews: 670 - Favs: 739 - Follows: 881 - Updated: 2/22 - Published: 12/20/2020 - OC, V, Panam P.
El anillo conoce al martillo by Whynotman 234 reviews
La humanidad, la especie que debió de enfrentar a una amenaza compuesta por múltiples especies unidas por una religión, enfrentando a la muerte de frente y luchando una y otra vez contra la aniquilación. Pero esta vez no será como siempre, un extraño recién llegado llego a la mesa, mas retrograda y terrible que la alianza. La humanidad se enfrentara a si misma en una forma extraña.
Crossover - Warhammer & Halo - Rated: T - Spanish - Adventure/Sci-Fi - Chapters: 6 - Words: 9,858 - Reviews: 14 - Favs: 14 - Follows: 14 - Updated: 2/22 - Published: 1/9
Halo: Universal Vortex by NeroFlashfox 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: 25 - Words: 55,183 - Reviews: 72 - Favs: 144 - Follows: 176 - Updated: 2/22 - Published: 1/10 - C. Halsey, Naruto U.
Boku No Halo Academia: Rising Conflict by Iowaman24 reviews
Just coming from a desperate battle on another world, Aurdel is hard-pressed to find himself on an alternate Earth where superpowers are completely commonplace. While for now stuck in a battle against Villains and the critics of his methods, he must prepare himself and others for a conflict on the horizon that just may bring about a fiery and devastating end to the world.
Crossover - Halo & My Hero Academia/僕のヒーローアカデミア - Rated: T - English - Adventure/Sci-Fi - Chapters: 32 - Words: 174,547 - Reviews: 47 - Favs: 167 - Follows: 184 - Updated: 2/22 - Published: 12/8/2020 - OC, Shouta A./Eraserhead, 1-A Students
Halo: Avengers by IX404 reviews
For three years, everyone had assumed that the Master Chief was MIA. Little did they know was that he would not only return home, but become involved in a mission that would save another universe from destruction.
Crossover - Halo & Marvel's Avengers - Rated: T - English - Sci-Fi/Adventure - Chapters: 10 - Words: 57,570 - Reviews: 76 - Favs: 199 - Follows: 234 - Updated: 2/22 - Published: 1/7 - Master Chief/John-117, Cortana, Kamala K., Tony S.
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