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Mobile Suit Gundam:The War of Reunion by Johnnieboy11 reviews
Asticassia School is gone. The DAWN OF FOLD, or someone else, destroyed it. Cast from their time and place, two young women and their Gundam now find themselves amidst the waning days of the greatest war this world's version of mankind has ever faced. Survival is not guaranteed, though there is hope, perhaps now, more than ever, for humanity.
Crossover - Halo & Mobile Suit Gundam: The Witch from Mercury - Rated: M - English - Suspense/Sci-Fi - Chapters: 2 - Words: 9,950 - Reviews: 15 - Favs: 72 - Follows: 82 - Updated: 10h - Published: 9/13 - [Suletta M., Miorine R.] Master Chief/John-117, Cortana
Green Machine by giblo126
When a Resistance base is attacked by a Combine army, a mysterious hero comes to save them
Crossover - Half-Life & Halo - Rated: T - English - Sci-Fi - Chapters: 1 - Words: 1,289 - Favs: 2 - Follows: 4 - Published: 9/28
Semper Vigiles by Cypher1597 reviews
Headhunter. Spartan. Killer. Cyrus was many things, but killer is the most accurate term. Now he stands in a city full of killers all vying to be top dog. Let those fools climb over one another to reach the apex. It won't matter because soon it will all come crashing down. All of it, for we are but motes of dust and echoes. From dust we rise and to dust we go. Semper Vigiles.
Crossover - Halo & Cyberpunk 2077 - Rated: M - English - Adventure - Chapters: 2 - Words: 11,587 - Reviews: 36 - Favs: 151 - Follows: 182 - Updated: 9/27 - Published: 9/21
The Song of Infinity by Johnnieboy11 reviews
As the battle of Christophsis is ongoing, a new faction emerges over the crystalline battlefield. Confusion, worry and fear permeate the Republic lines until a first shot is fired in anger by the Confederacy. A change stirs in the Force, the Reclaimers are awakening and the Galaxy at large is powerless to stop them.
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 17 - Words: 68,020 - Reviews: 127 - Favs: 518 - Follows: 666 - Updated: 9/27 - Published: 3/23 - Anakin Skywalker, Ahsoka T., Master Chief/John-117, T. Lasky
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: 5 - Words: 29,124 - Reviews: 85 - Favs: 292 - Follows: 443 - Updated: 9/27 - Published: 7/31
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: 13 - Words: 25,846 - Reviews: 9 - Favs: 14 - Follows: 29 - Updated: 9/26 - Published: 9/14
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: 7 - Words: 26,400 - Reviews: 86 - Favs: 297 - Follows: 399 - Updated: 9/26 - Published: 11/29/2022 - Master Chief/John-117, Cortana, Commander, Rapi
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: 32 - Words: 146,072 - Reviews: 298 - Favs: 332 - Follows: 467 - Updated: 9/26 - Published: 9/20/2022 - Samus A., Adam, Master Chief/John-117, Cortana
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: 2 - Words: 11,875 - Reviews: 17 - Favs: 36 - Follows: 51 - Updated: 9/26 - Published: 9/8 - Rodney M., John S., OC
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: 22 - Words: 76,271 - Reviews: 75 - Favs: 130 - Follows: 166 - Updated: 9/25 - Published: 7/15 - Space Marines, OC, Arbiter, Linda-058
Horizon War:Tales of the UNSC-Citizen Federation War by Johnnieboy11 reviews
A chance encounter with Forerunner Technology leads the UNSC to discover a two-way portal which leads into a Universe so similar, yet ever so different from their own. First contact with said Universe's humanity, however, goes awfully wrong, sparking the greatest war since the Human-Covenant War. These are the tales of those who fought in it.
Crossover - Halo & Starship Troopers - Rated: M - English - Adventure/Sci-Fi - Chapters: 12 - Words: 44,890 - Reviews: 148 - Favs: 201 - Follows: 265 - Updated: 9/25 - Published: 6/13 - [J. Rico, Dizzy F.] C. Halsey, T. Lasky
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: 30 - Words: 512,045 - Reviews: 769 - Favs: 889 - Follows: 1,052 - Updated: 9/25 - Published: 10/11/2022 - Luke S., Han S., Master Chief/John-117, T. Lasky
Code Lyoko: War logs 1 by superman42 reviews
Stories (in chapter order) Prologue (Prelude to Crisis core) Dark Harvest storyline (start of crisis core) Heart of Ice (needed to understand prologue future crisis) Breakdown (Scrapped concept involving dino hybrids) in order: Prologue the remaining five chapters after that start Dark Harvest HOI precedes Dark Harvest (CC pt 1) which leads to Breakdown WL2 finishes CC
Crossover - Code Lyoko & Halo - Rated: M - English - Tragedy/Drama - Chapters: 14 - Words: 15,532 - Reviews: 8 - Favs: 3 - Follows: 2 - Updated: 9/25 - Published: 3/1/2022 - Aelita S., Jeremie B., Yumi I., OC - Complete
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: 61,641 - Reviews: 4 - Favs: 6 - Follows: 7 - Updated: 9/25 - Published: 6/27 - H. Dinh, OC, Aang, Katara
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: 15 - Words: 86,336 - Reviews: 311 - Favs: 1,047 - Follows: 1,070 - Updated: 9/24 - Published: 1/13/2016 - Master Chief/John-117, Diana of Themyscira/Wonder Woman, Shiera H./Shayera Hol/Hawkgirl
HALO: Dead Man of the Moon by UH-60 NIGHTSTALKER reviews
When a new yet familiar Enemy threatens Neo-Queen Serenity and her court/friends, an unlikely ally appears and just happens to have a UNSC Warship at his command. But can Serenity's Senshi trust this new armored clad stranger?
Crossover - Halo & Sailor Moon - Rated: T - English - Adventure/Sci-Fi - Chapters: 22 - Words: 63,234 - Reviews: 98 - Favs: 129 - Follows: 153 - Updated: 9/22 - Published: 1/30/2021 - Neo-Queen Serenity, OC
spartan returns home by phoenix emperor 23 reviews
injured on a mission the first son of minato and kushina. he found something that put him in a war he never thought was possible. on his final mission on reach he chose to be behind. with the wider of the UNSC and ONI thought he died on reach. he had a chance to go back. now he must defended his family and the woman he love from the shadows. even it means the world to think he dead
Crossover - Halo & Naruto - Rated: M - English - Romance - Chapters: 5 - Words: 19,937 - Reviews: 5 - Favs: 64 - Follows: 86 - Updated: 9/21 - Published: 11/1/2021 - [SPARTAN-B312/Noble Six, Hana I.] [Minato N., Kushina U.]
Zero Trust by Roach99 reviews
After unfortunate circumstances, a stranger finds himself in a familiar but stranger land. Though lost and cut off, this is not the end. Rather, a possible new beginning. A place of sights and circumstance- the conclusion of one phase of life and the beginning of another. A new life to be found, and another conflict to wage.
Crossover - Halo & Cyberpunk 2077 - Rated: M - English - Adventure - Chapters: 1 - Words: 7,841 - Reviews: 7 - Favs: 49 - Follows: 73 - Published: 9/21 - OC, V
The Spartan and The Heiress by ArmadaScream reviews
After destroying the Flood and escaping the Ark Master Chief and Cortana find themselves on a strange new world where monsters roam freely, and magic truly exists. Together with Weiss Schnee, a huntress in training the unlikely trio will fight the forces of evil and save the world.
Crossover - RWBY & Halo - Rated: T - English - Adventure/Fantasy - Chapters: 4 - Words: 18,172 - Reviews: 18 - Favs: 73 - Follows: 111 - Updated: 9/21 - Published: 3/21 - Weiss S., Master Chief/John-117, Cortana, Team RWBY
RWBY:Spartan Assault by Johnnieboy11 reviews
After John-117's battle on board Mantle's Approach, the Spartan finds himself, with Cortana in tow, sent to a different world, where monsters roam the wilds, Humanity is confined to 4 major Kingdoms and where Magic and Tech coexist. The Spartan will soon have to join the ranks of the good guys against a horrid threat, whilst also on the lookout for fellow Spartans.
Crossover - Halo & RWBY - Rated: T - English - Adventure/Sci-Fi - Chapters: 30 - Words: 133,954 - Reviews: 200 - Favs: 555 - Follows: 682 - Updated: 9/21 - Published: 1/12/2021 - [Master Chief/John-117, Cortana] C. Halsey, Team RWBY
Operation Unusual Paperwork by kpmh2001 reviews
A side story containing all of the story exerpts, post chapter nonsense, and omakes that the world of The Men From Onyx has to offer, now in one convenient package! Warning: The tone and intention of these short stories will change on a by-chapter basis, tonal consistency is effectively not a consideration.
Crossover - Halo & RWBY - Rated: T - English - Parody/Humor - Chapters: 38 - Words: 138,153 - Reviews: 189 - Favs: 104 - Follows: 109 - Updated: 9/20 - Published: 10/4/2019
Dance With the Devil (2) by ghost company reviews
Vader had it all planned out. Sidious would die. For years he had plotted, conspired, murdered, and forged elaborate lies to get to this point. However, when the Force throws in a new variable, years of planing are called into question. Will the Sith Lord be able to complete his revenge, and who will he be in the end... Anakin or Vader?
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 14 - Words: 90,991 - Reviews: 105 - Favs: 287 - Follows: 375 - Updated: 9/20 - Published: 11/21/2018
Halo Over These Digital Pockets by Yoshizilla-Rhedosaurus
Master Chief has a hard time winning for his team with a pair of capsule creatures from digital pockets not exactly helping out.
Crossover - Digimon/Pokemon & Halo - Rated: T - English - Humor/Hurt/Comfort - Chapters: 1 - Words: 157 - Published: 9/19 - Master Chief/John-117 - Complete
Halo: Eagle's Incantation by GruntBasher reviews
Shirou and Artoria vowed to reunite as starcrossed lovers; this was not what they had in mind. Being reborn for some inextricable reason, they are flung to the far future. A world where technology has advanced leaps and bounds, a world without a need for heroes. Regardless, history must march on, and Fate has quite an interest in making some new heroes...
Crossover - Halo & Fate/stay night - Rated: T - English - Adventure/Sci-Fi - Chapters: 9 - Words: 44,486 - Reviews: 55 - Favs: 234 - Follows: 339 - Updated: 9/19 - Published: 8/11/2022 - [Arturia Pendragon, Shirō E.] Rin T., Illyasviel von Einzbern
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.
Crossover - Halo & X-overs - Rated: M - English - Sci-Fi/Friendship - Chapters: 12 - Words: 46,572 - Reviews: 43 - Favs: 92 - Follows: 113 - Updated: 9/19 - Published: 8/9/2022 - Fred-104, Serina
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