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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: 37 - Words: 132,877 - Reviews: 187 - Favs: 102 - Follows: 107 - Updated: 8/16 - Published: 10/4/2019
The ONI Offensive by MrChef99 reviews
A small killteam of Spartan 3's are approached by the assassin's brotherhood during an OP against insurrectionists and are told the truth about ONI, and their plot to continue the Human-Covenant war so that they can be led to more forerunner artifacts to unlock the true potential of the apple of Eden.
Crossover - Halo & Assassin's Creed - Rated: T - English - Sci-Fi/Mystery - Chapters: 2 - Words: 1,872 - Reviews: 1 - Follows: 3 - Updated: 8/15 - Published: 7/22
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: 5 - Words: 19,360 - Reviews: 57 - Favs: 282 - Follows: 383 - Updated: 8/15 - Published: 3/12/2022 - [Cortana, Master Chief/John-117] Captain America/Steve R., Iron Man/Tony S.
Stained Ambition by Halgen reviews
We’ve been separated for too long. Enough is enough. The Covenant, ONI, and now a literal god. Well… bring it for I’m a warrior from beyond the stars and… I have been given a chance. One. That. I. Will. Take. A safe haven for both us, a place where we could be brother and sister again. For we were together before and we will be together in the end. We promised after all.
Crossover - Halo & Genshin Impact - Rated: M - English - Adventure/Sci-Fi - Chapters: 4 - Words: 29,317 - Reviews: 6 - Favs: 16 - Follows: 26 - Updated: 8/14 - Published: 7/17 - OC, Aether, Paimon
Homeward Bound:The Human-Covenant War by Johnnieboy11 reviews
As the Human-Covenant War rages on in the year 2552, the UNSC gathers the best of its SPARTANs on Reach in a final bid to buy themselves time against the tide of the Alien Hegemony.. In the meanwhile, a Patrol Ship orbiting the outer areas of the Epsilon Eridani system finds an unknown vessel as it floats aimlessly. Aboard it may be the key to saving humanity, second to Chief.
Crossover - Halo & SIGNALIS - Rated: T - English - Angst/Sci-Fi - Chapters: 17 - Words: 86,777 - Reviews: 44 - Favs: 112 - Follows: 142 - Updated: 8/14 - Published: 2/7 - [Elster/LSTR-512, Ariane Yong] Master Chief/John-117, Cortana
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: 8 - Words: 37,971 - Reviews: 4 - Favs: 3 - Follows: 6 - Updated: 8/14 - Published: 6/27 - H. Dinh, OC, Aang, Katara
Noble Intent by In BRRRRRRT We Trust reviews
Without warning, her world went dark, but that's not where her story ends. When Catherine - B320 wakes up in a small room surrounded by others wielding legendary weapons, she quickly realizes what she's in for and now has to adapt to a different kind of hell. Will she fall just as she did on Reach? Or will she bring about a change solidifying her status as a demon?
Crossover - Halo & Rising of the Shield Hero/盾の勇者の成り上がり - Rated: M - English - Adventure/Fantasy - Chapters: 7 - Words: 46,837 - Reviews: 68 - Favs: 229 - Follows: 278 - Updated: 8/13 - Published: 6/27 - Catherine-B320/Kat/Noble Two, Raphtalia
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: 3 - Words: 24,495 - Reviews: 26 - Favs: 73 - Follows: 108 - Updated: 8/13 - Published: 5/12 - Master Chief/John-117, A. J. Johnson, Cortana, Team RWBY
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: 18 - Words: 109,977 - Reviews: 410 - Favs: 1,142 - Follows: 1,531 - Updated: 8/12 - Published: 11/25/2020 - OC, Master Chief/John-117, Cortana
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: 75 - Words: 885,380 - Reviews: 210 - Favs: 431 - Follows: 469 - Updated: 8/11 - Published: 9/29/2020 - Sole Survivor, Arthur Maxson, Shaun, OC
Still in the fight by Scepter 2-1 actual reviews
Team Prime battles to defend Earth from the Decepticons with the help of their human allies. Then one day, a mysterious ship shows up, straight out of another war, carrying one of its most hardened veterans with one of his closest friends. A man known to the enemy as a Demon. Cover image is not mine.
Crossover - Halo & Transformers/Beast Wars - Rated: T - English - Sci-Fi/Adventure - Chapters: 11 - Words: 40,066 - Reviews: 74 - Favs: 209 - Follows: 255 - Updated: 8/10 - Published: 12/13/2021 - Arcee, Bulkhead, Jack D., SPARTAN-B312/Noble Six
Halo: The Culmination Of Sins by Reaper Eye Fuck ONI reviews
The Great Cold War has raged on for Three Centuries with neither side able to gain the advantage to destroy the other all 3 factions wait for the inevitable Showdown and that showdown was Harvest, this planet out in the middle of nowhere would become the spark that would light the Galaxy on fire but not in the way anyone would think...
Crossover - Halo & Killzone - Rated: M - English - Sci-Fi - Chapters: 1 - Words: 2,392 - Reviews: 1 - Favs: 8 - Follows: 11 - Published: 8/10 - A. J. Johnson, Arbiter
Harry Potter got trained by Driver1985 reviews
On the night Harry would have been dropped off by his Aunt, Dumbledore had someone else in mind. What if Harry was taken in by other strong people and they even decided to train him? Trained to be a Warrior by Wolves and the UNSC, he will change the world. OP, smart, trained Harry, small harem double cross with Witcher and Halo
Crossover - Harry Potter & Halo - Rated: M - English - Fantasy/Sci-Fi - Chapters: 83 - Words: 412,510 - Reviews: 325 - Favs: 708 - Follows: 835 - Updated: 8/10 - Published: 9/30/2021 - [Harry P., Hermione G., Daphne G.] Master Chief/John-117
Different world, but the mission remains by Ranger2287 reviews
Still can't think of a summary
Crossover - Halo & Xenoblade Chronicles 2 - Rated: T - English - Chapters: 3 - Words: 16,134 - Reviews: 2 - Favs: 5 - Follows: 11 - Updated: 8/10 - Published: 8/17/2022 - Master Chief/John-117, Cortana
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: 1 - Words: 9,729 - Reviews: 6 - Favs: 14 - Follows: 23 - Published: 8/9
Xcom: Fire From Above by StalinWithDaSpoon reviews
XCOM was losing. It lost the first contact war, and now it was losing the resistance war. Even with the Commander to lead them, they had made little progress in destabilizing the aliens regime. But this would change with a new factor being added to the battle, as what can only be described as Fire From Above.
Crossover - X-Com & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 4 - Words: 10,337 - Reviews: 8 - Favs: 46 - Follows: 71 - Updated: 8/9 - Published: 7/19 - Bradford, J. Cutter, E. Anders, Jerome-092
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: 3 - Words: 13,375 - Reviews: 1 - Favs: 7 - Follows: 8 - Updated: 8/8 - Published: 7/29 - OC, Izuku M., 1-A Students
Noble 6: Ghost of Reach by thermalsnipern7 reviews
The war against the Covenant ended, but something else pressed humanity to the verge of extinction like they never did. Now, Noble 6 rises again to defend humanity like he had done before, and make humanity into something strong like it was so long ago. The one thing his enemies keep wondering is why they hear boss music.
Crossover - Halo & Destiny - Rated: M - English - Sci-Fi/Romance - Chapters: 8 - Words: 34,067 - Reviews: 29 - Favs: 103 - Follows: 118 - Updated: 8/8 - Published: 7/31/2022 - [SPARTAN-B312/Noble Six, Fallen]
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: 22 - Words: 120,421 - Reviews: 127 - Favs: 274 - Follows: 411 - Updated: 8/8 - Published: 2/21/2022
Men and Machines by 1DL1NG KN1GHT reviews
It has been four years since the Human-Covenant War. The Master Chief is caught in a battle between the Republic warships and the Malevolence. But a war-torn UNSC will not want to be involved in another, and soon the Didact’s release approaching, peace never seems to last. But secretly, Lord Sidious is expanding his chessboard, with a new plan to reach to both worlds…
Crossover - Halo & Star Wars: The Clone Wars - Rated: T - English - Sci-Fi/Adventure - Chapters: 5 - Words: 20,656 - Reviews: 35 - Favs: 82 - Follows: 94 - Updated: 8/8 - Published: 4/12 - Master Chief/John-117, General Grevious, Count Dooku, Jorge-052/Noble Five
Remnants by General Rage reviews
From Halo's ashes, a mismatched Alliance is born. UNSC soldiers now serve alongside both Batarian deserters and shifty Jackal Space Pirates. Now Shepard and Master Chief have to keep these strange bedfellows from killing one another before they can stop an emergent new threat to the galaxy. The Next Swashbuckling Chapter of the Wormhole Chronicles.
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Sci-Fi - Chapters: 39 - Words: 829,112 - Reviews: 808 - Favs: 469 - Follows: 534 - Updated: 8/7 - Published: 4/22/2016 - Master Chief/John-117, Cortana, Tali'Zorah, Shepard
Dust and Echoes by trestwho reviews
After a successful mission, a UNSC fleet makes a random slipspace jump only to come across an uncharted system containing a sliver of humanity, one with seemingly no connection to Earth and whose natural abilities defy reason. In a galaxy full of terrifying dangers, the UNSC and Remnant must work together to defend all they know from annihilation.
Crossover - Halo & RWBY - Rated: M - English - Sci-Fi/Adventure - Chapters: 30 - Words: 371,440 - Reviews: 1274 - Favs: 1,466 - Follows: 1,626 - Updated: 8/7 - Published: 1/12/2020 - Master Chief/John-117, Arbiter, Team RWBY, Team JNPR
The Sins of our Fathers by MarkerMagnum reviews
Unknown to the Citadel Council, the Human-Covenant war nears its vicious end. Miranda Keyes is seconds too slow. Delta Halo fires, leaving UNSC space as a lifeless snapshot in time. The Citadel must morn the loss of a civilization they never knew.
Crossover - Halo & Mass Effect - Rated: T - English - Drama/Sci-Fi - Chapters: 9 - Words: 84,696 - Reviews: 382 - Favs: 1,072 - Follows: 1,479 - Updated: 8/7 - Published: 2/11 - Cortana, Councilor Valern, Councilor Tevos, Councilor Sparatus
The UNSC in a galaxy far far away by Xenofoxwolf reviews
What happens when someone gets Isekaied into the Star wars galaxy at the start of the invasion of the Naboo with a modified halo Wars unsc that takes units from the Covent and banished in a unsc style along with some lepi and the ability to unlock new halo technologies over time, How will this affect the Star wars galaxy?.
Crossover - Halo & Star Wars - Rated: M - English - Sci-Fi/Adventure - Chapters: 1 - Words: 2,240 - Reviews: 5 - Favs: 25 - Follows: 34 - Published: 8/5
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: 29 - Words: 129,574 - Reviews: 196 - Favs: 535 - Follows: 661 - Updated: 8/4 - Published: 1/12/2021 - [Master Chief/John-117, Cortana] C. Halsey, Team RWBY
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