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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.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 12 - Words: 46,335 - Reviews: 219 - Favs: 723 - Follows: 1,092 - Updated: 21h - Published: 12/26/2021 - OC, Tali'Zorah, Admiral Hackett, Rael'Zorah
ARES:The Gods of War by Johnnieboy11 reviews
Mankind's Greatest Hero has finished his mission once more. Saving Earth from the Didact and his weapon of mass-recruitment, the Composer, the Master Chief and his AI companion, Cortana, find themselves mysteriously transported to a strange variation of Earth, where machines rule the surface and mankind hides below. The SPARTAN and those that join will fight to Reclaim the world...
Crossover - Halo & Goddess of Victory: Nikke - Rated: T - English - Adventure/Sci-Fi - Chapters: 11 - Words: 39,380 - Reviews: 121 - Favs: 317 - Follows: 428 - Updated: 10/7 - Published: 11/29/2022 - Master Chief/John-117, Cortana, Commander, Rapi
Stargate Atlantis Fire Within by heavyneos reviews
Just as the Atlantis team think they have finally found a reprieve from the Wraith thanks to a fortuitous accident something hidden in deep space and from another world may bring more than one complication to the fight
Crossover - Halo & Stargate: Atlantis - Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 14,209 - Reviews: 22 - Favs: 54 - Follows: 72 - Updated: 10/7 - Published: 9/8 - Rodney M., John S., OC
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: 1 - Words: 5,676 - Reviews: 1 - Favs: 12 - Follows: 18 - Published: 10/6 - Master Chief/John-117, Shepard
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/Adventure - Chapters: 14 - Words: 102,979 - Reviews: 95 - Favs: 210 - Follows: 284 - Updated: 10/6 - Published: 7/22/2020 - J. Cutter, Belfast, OC
Sekirei: The Lost Wolf by Helghast honored guard reviews
The Lonewolf 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: 16 - Words: 126,286 - Reviews: 113 - Favs: 359 - Follows: 454 - Updated: 10/6 - Published: 3/2/2022 - SPARTAN-B312/Noble Six, No. 12/Hibiki, No. 11/Hikari, No. 16/Toyotama
Star Wars: Odyssey of the Infinity by IX404 reviews
During a routine safety test, the Slipstream Space Drive of the Infinity malfunctions, catapulting them into unknown space. Little do Lasky and the members of the Infinity know is that they will soon change the fate of a far away galaxy.
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi/Drama - Chapters: 31 - Words: 511,415 - Reviews: 785 - Favs: 902 - Follows: 1,063 - Updated: 10/6 - Published: 10/11/2022 - Luke S., Han S., Master Chief/John-117, T. Lasky
The Iron Cross by Lighting wolf knight reviews
Scattered, in a world where their emperor never existed... The Ultramarines have but one purpose... Protect humanity and act among them. Rated T for violence, death, and profanity. Read next chapter Author Notes for important news.
Crossover - Warhammer & Halo - Rated: T - English - Adventure/Romance - Chapters: 25 - Words: 86,742 - Reviews: 75 - Favs: 139 - Follows: 176 - Updated: 10/6 - Published: 7/15 - Space Marines, OC, Arbiter, Linda-058
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: 19 - Words: 114,554 - Reviews: 415 - Favs: 1,181 - Follows: 1,573 - Updated: 10/6 - Published: 11/25/2020 - OC, Master Chief/John-117, Cortana
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.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 11 - Words: 43,836 - Reviews: 66 - Favs: 350 - Follows: 498 - Updated: 10/6 - Published: 7/7/2016 - SPARTAN-B312/Noble Six
New era by martinantab reviews
Human-Covenant war ends and and UEG started with rebuilding. Former covenant races, after Elite-Brute Coalition sucess, entered the coalition and few years later humans too and new aliance was born. They thought, they will live in peace with no wars and/or limited conflicts, this was destroyed after discovery of suspect object not far away from Tassili, new harvest colony
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Humor - Chapters: 1 - Words: 1,876 - Reviews: 3 - Favs: 10 - Follows: 14 - Published: 10/6 - T. Hood, Master Chief/John-117, Councilor Sparatus, Councilor Tevos
Halo Gundam by 6-4 pilot reviews
Stuck in the Universal Century during the One Year War, Master Chief and his companions help the White Base Crew survive while also trying to find a way back to Zeta Halo. In the meantime, a group of battle-hardened Banished troops does what their organization does best. Take advantage of conflicts and various organizations for their own benefit. (Also includes Owl House)
Crossover - Halo & Gundam UC - Rated: M - English - Sci-Fi - Chapters: 32 - Words: 118,565 - Reviews: 203 - Favs: 112 - Follows: 134 - Updated: 10/5 - Published: 6/22/2022 - Master Chief/John-117, Amuro R.
Halo: Lost in Hogwarts by floodrisk07 reviews
LordCaldrin45's Master Chief and The Order Of The Phoenix continued. The wreckage of the Forward Unto Dawn went through a black hole, teleporting Master Chief and Cortana back to 1995 Earth and crash landing in England, where Harry Potter is taking his fifth year. A new adventure is about to begin. (COVER) Master Chief in a Ford Anglia
Crossover - Harry Potter & Halo - Rated: T - English - Sci-Fi/Fantasy - Chapters: 14 - Words: 28,384 - Reviews: 13 - Favs: 16 - Follows: 31 - Updated: 10/5 - Published: 9/14
The Fast And The Noble by SSJ Lone Wolf reviews
A decade after being transported back to the late twentieth century following the Fall of Reach, Noble Six and Auntie Dot have worked tirelessly to uplift humanity through Noble Industries. However after encountering Mia Toretto and protecting her from a Cyberpsycho he slowly finds himself returning to a life he swore he'd never return too. Cyberpunk 2077 Elements.
Crossover - Fast and the Furious & Halo - Rated: M - English - Chapters: 7 - Words: 42,107 - Reviews: 119 - Favs: 370 - Follows: 398 - Updated: 10/5 - Published: 3/22 - Letty, Mia, SPARTAN-B312/Noble Six
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: 18 - Words: 135,771 - Reviews: 943 - Favs: 1,800 - Follows: 2,312 - Updated: 10/3 - Published: 7/28/2018 - Anakin Skywalker, Obi-Wan K., Master Chief/John-117, Cortana
Boku No Halo Academia: For Want of a Mustard Seed by Iowaman24 reviews
Eleven years have passed since the apocalyptic collapse at the end of the Third World War, and under Aurdel Ganowicz's oversight much of Japan has been rebuilt. However many are still unhappy with the way things are, and as a result the League of Villains has returned. But without an ideology, and under a seemingly revived former member, they are hellbent on destroying everything.
Crossover - Halo & My Hero Academia/僕のヒーローアカデミア - Rated: M - English - Sci-Fi/Drama - Chapters: 6 - Words: 30,438 - Reviews: 1 - Favs: 8 - Follows: 9 - Updated: 10/3 - Published: 7/29 - OC, Izuku M., 1-A Students
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/Suspense - Chapters: 33 - Words: 150,248 - Reviews: 306 - Favs: 337 - Follows: 473 - Updated: 10/3 - Published: 9/20/2022 - Samus A., Adam, Master Chief/John-117, Cortana
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: 5 - Words: 49,971 - Reviews: 42 - Favs: 116 - Follows: 139 - Updated: 10/3 - Published: 8/24 - Master Chief/John-117, Arbiter, 343 Guilty Spark, C. Halsey
Gensokyo: Combat Evolved by CrackPairingLover reviews
A collection of short stories that are all loosely connected to one another. Please leave reviews and share your thoughts to keep this story going.
Crossover - Halo & Touhou Project - Rated: M - English - Sci-Fi/Fantasy - Chapters: 8 - Words: 4,252 - Reviews: 9 - Favs: 1 - Follows: 2 - Updated: 10/2 - Published: 7/26 - Rtas 'Vadumee, Youmu K., Rookie, Reimu H.
Infinite Noble by Arkanehouse
"Conoces esta cosa...la vieja paradoja de remplazo, se pregunta si cuando a un objeto se le reemplazan todas sus partes, si este sigue siendo el mismo. Ya no eres el mismo, pero ellos creen que esa versión tuya es el verdadero tu. ¿Pero por qué? ¿Solo porque apareció primero?. Si no, tendrás que inventar tu propio "yo". O no ser nadie en absoluto. Ese es tu problema."
Crossover - Halo & Infinite Stratos/IS<インフィニット・ストラトス> - Rated: M - Spanish - Sci-Fi/Adventure - Chapters: 2 - Words: 3,905 - Favs: 5 - Follows: 5 - Updated: 10/2 - Published: 9/16 - SPARTAN-B312/Noble Six
War of the Old Ones by Ian the Mechanic reviews
In forgotten ages past, two near eldritch forces vied for the very life essence of the Galaxy. Unknown to the young races, that war is still ongoing. how can the UNSC, the Citadel Council or the Covenant hope to stand against such forces, when they are still embroiled in their own petty squabbling? How could they hope to survive the War of the Old Ones?
Crossover - Mass Effect & Halo - Rated: M - English - Sci-Fi/Horror - Chapters: 24 - Words: 129,715 - Reviews: 142 - Favs: 288 - Follows: 432 - Updated: 10/2 - Published: 2/21/2022
Book 1: Wolves by Believer218 reviews
The Academy became the home of Spartan training after the loss of Laconia Station. Kept hidden for decades, it has the potential to tip the balance in favor of the UNSC. But secrets lurk beneath the facility, and they are about to be unleashed. Join the Lone Wolves as they embark on an adventure that could change more than one universe. The first adventure in the Lost Wolves Saga.
Crossover - Halo & Avatar: Last Airbender - Rated: T - English - Fantasy/Adventure - Chapters: 11 - Words: 61,667 - Reviews: 4 - Favs: 6 - Follows: 7 - Updated: 10/1 - Published: 6/27 - H. Dinh, OC, Aang, Katara
Many hands make light work by Polluxsashes reviews
A normal twenty-first century human mind stuck inside a Huragok, a Forerunner biobot, gets punted straight into the worst place anyone could ever be: Warhammer 40k. What is he to do but what he is made for? Beware all who call this horrid universe home, you will be 'halped'. First story on this site, updates every month. I have up to chapter 12 already written.
Crossover - Warhammer & Halo - Rated: M - English - Sci-Fi - Chapters: 11 - Words: 21,670 - Reviews: 93 - Favs: 308 - Follows: 434 - Updated: 10/1 - Published: 4/27
HaloGears of War:: Gears Into The Outer Frontier by Spec-Op Marine 117 reviews
The Locust War on Sera was supposed to end. for good but a discovery of a mysterious alien artifact in Azura teleported Marcus and the Gears off to another universe, the world of Reach, The Gears found themselves drawn into something more significant than ever, another one had just begun. New allies, the Spartans. A new enemy and a new war to fight. A New Fight.
Crossover - Halo & Gears of War - Rated: M - English - Adventure/Sci-Fi - Chapters: 3 - Words: 10,597 - Reviews: 20 - Favs: 22 - Follows: 28 - Updated: 10/1 - Published: 7/19 - SPARTAN-B312/Noble Six, Marcus F., Anya S.
Bellum Terranum by F35B reviews
In the year 2585 the Humans have mostly recovered from the effects of the Human-Covenant War, however unknown to them, there is a much larger Galaxy out there... one that doesn't take kindly to humanity and their... antics... However an old threat still lays out there, ready to strike. Pls Read & Review (Slight HFY)(AU)
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 6 - Words: 29,252 - Reviews: 165 - Favs: 306 - Follows: 469 - Updated: 9/30 - Published: 7/31
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