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The Mantle of Remnant by KtyouVsWriting reviews
The Master Chief has saved Humanity at the cost of Cortana, one of his few remaining friends. More than he will admit, John relied on her, cared for her. To no longer have her means to lose another part of his humanity. Still the universe keeps going and once again, he is called to serve and protect Mankind. Now he has a choice: does he brave Remnant alone or does he embrace help?
Crossover - Halo & RWBY - Rated: M - English - Adventure/Friendship - Chapters: 27 - Words: 150,738 - Reviews: 744 - Favs: 1,521 - Follows: 1,950 - Updated: 8/28 - Published: 5/16/2019 - Master Chief/John-117
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: 9 - Words: 45,351 - Reviews: 4 - Favs: 4 - Follows: 6 - Updated: 8/28 - Published: 6/27 - H. Dinh, OC, Aang, Katara
The Terran Calamity by F35B reviews
(Formerly United Freedom) The Republic finds a small planet on the edge of their space but little do they know the repercussions of their actions. The Terran Eagle will not accept any compromises, nor will any of her citizens. (Halo Inspired Universe) (Star Wars Canon Universe) (Hiatus)
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi - Chapters: 8 - Words: 70,565 - Reviews: 136 - Favs: 376 - Follows: 481 - Updated: 8/27 - Published: 1/3 - OC
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: 4 - Words: 16,501 - Reviews: 42 - Favs: 206 - Follows: 246 - Updated: 8/27 - Published: 6/24/2019 - T. Lasky, S. Carter
Blood for blood by Lighting wolf knight reviews
As the emperor falls, a new one ascends and his angels take flight... Into a galaxy that needs them. Rated T for violence, death, and profanity.
Crossover - Warhammer & Halo - Rated: T - English - Adventure/Sci-Fi - Chapters: 5 - Words: 9,770 - Reviews: 1 - Favs: 5 - Follows: 9 - Updated: 8/26 - Published: 8/5 - Space Marines, OC, Kelly-087
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: 76 - Words: 898,949 - Reviews: 211 - Favs: 439 - Follows: 472 - Updated: 8/25 - Published: 9/29/2020 - Sole Survivor, Arthur Maxson, Shaun, OC
Halo: Spartan Spider by G4dgetJunior reviews
Peter Parker defeats Thanos on Titan. In doing so, he, too, dies. However, this is not the end. Spidey is given a second chance in a different universe. One that desperately needs a hero. Halo X Marvel Spiderman AU fanfic. Peter Parker X Cortona.
Crossover - Avengers & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 2 - Words: 4,938 - Reviews: 8 - Favs: 22 - Follows: 30 - Updated: 8/25 - Published: 8/23 - Spider-Man/Peter Parker, A. J. Johnson, C. Halsey, Cortana
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: 3 - Words: 20,070 - Reviews: 87 - Favs: 224 - Follows: 253 - Updated: 8/24 - Published: 7/3 - SPARTAN-B312/Noble Six, Elena G., Stefan S., Bonnie B.
Iter In Astris by RememberReach312 reviews
After the Battle at the Ark, John-117 and Cortana are found and rescued by the long-lost UNSC "Spirit of Fire"... [Disclaimers within] [Cross-posted on SB] [Image not mine]
Crossover - StarTrek: Enterprise & Halo - Rated: T - English - Sci-Fi/Drama - Chapters: 4 - Words: 41,032 - Reviews: 57 - Favs: 224 - Follows: 308 - Updated: 8/24 - Published: 11/20/2022 - Master Chief/John-117, Cortana, J. Cutter
BattleTech: Combat Evolved by IX404 reviews
While fleeing from the Inner Sphere following the Amaris Coup, the Exodus Fleet discovers an object out in the inky blackness of space. Little does General Kerensky or his sons know is that they will soon be within the center of a conflict that will decide the fate of Humanity and place the Star League-in-Exile at the forefront of the conflict.
Crossover - Mechwarrior/Battletech & Halo - Rated: T - English - Sci-Fi/Drama - Chapters: 24 - Words: 108,347 - Reviews: 297 - Favs: 258 - Follows: 276 - Updated: 8/24 - Published: 8/25/2022 - Master Chief/John-117, A. J. Johnson, Arbiter, 343 Guilty Spark
Halo, Welcome to New York, Part 1: First Landing by SPARTAN-117-2 reviews
When Cortana awakens the slumbering Master Chief to alert him of a wormhole, a whole new war begins. Includes themes and characters from Harry Potter, Halo, Marvel, and some others.
Crossover - Halo & Slender - Rated: T - English - Sci-Fi/Adventure - Chapters: 5 - Words: 19,354 - Reviews: 6 - Favs: 25 - Follows: 27 - Updated: 8/24 - Published: 9/2/2022 - Master Chief/John-117, Slender
Star Wars: Tales of the Infinity's Odyssey by IX404 reviews
While many know of the story of Lasky, the Master Chief and his compatriots, few people know of the stories that happened during these major events. These are the stories of the men and women that also experienced the Odyssey of the Infinity.
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 29 - Words: 166,010 - Reviews: 197 - Favs: 233 - Follows: 248 - Updated: 8/23 - Published: 11/25/2022 - G. Marek/Starkiller, Jyn E., T. Hood, C. Halsey
Spartans Don't Play Games by You will not find me reviews
The Tourney of Harrenhall was the greatest of its kind in Westeros. It was a grand show of the power of house Whent that drew the attention of all seven kingdoms. However, the Westerlands have arrived with strange new allies. Great warriors who bear the sigil of an eagle with arrows and lightning in its claws. Who are these new allies, and what do they mean for Westeros?
Crossover - Halo & Game of Thrones - Rated: T - English - Fantasy/Sci-Fi - Chapters: 48 - Words: 195,499 - Reviews: 1609 - Favs: 1,601 - Follows: 1,913 - Updated: 8/22 - Published: 11/17/2020 - Kurt-051, Lucy-B091, Tom-B292, Tywin L.
The Great War by Forgotten Trooper reviews
9BBY The Galactic Empire is a Behemoth, with no Rebellion to speak of and a unstoppable military, it will soon find itself dragged into conflict with unforeseen enemies and unusual allies. The UNSC is losing the war to the Covenant, and the Prophets consolidate their power over their Dominion. These Gargantuan forces will collide in a war that will leave the galaxy forever changed.
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi - Chapters: 2 - Words: 7,235 - Reviews: 10 - Favs: 41 - Follows: 52 - Updated: 8/22 - Published: 8/13 - Darth Vader, General Veers, Prophet of Truth, P. Cole
The Brotherhood of Fire by Frostdragon2468 reviews
After the Spirit of Fire leaves the shield world, it is left drifting in space, before a mysterious contact from "New Vegas" on Earth leads the ship down an odd spiral of new circumstances.
Crossover - Fallout & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 726 - Reviews: 4 - Favs: 12 - Follows: 18 - Published: 8/21 - Courier, J. Cutter, E. Anders, Yes Man
Penumbra: Black Plague by Ginopippofreebooter reviews
A pen, a notebook and some time alone. That is all that the Young Wolf Jake needed and unlike his Titan comrades, he liked to report new findings and informations on it. So, what happens when a Taken anomaly guides him to a seemingly giant ring in the middle of space? (Set from the start of Halo 1 to 3.) (Cover by Abrax1245/Ikarus Prime, follow him on Reddit).
Crossover - Halo & Destiny - Rated: T - English - Sci-Fi/Adventure - Chapters: 26 - Words: 96,124 - Reviews: 148 - Favs: 258 - Follows: 324 - Updated: 8/21 - Published: 6/26/2021 - Master Chief/John-117, Cortana, Ghost, Guardian - Complete
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: 4 - Words: 22,024 - Reviews: 65 - Favs: 261 - Follows: 385 - Updated: 8/21 - Published: 7/31
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: 6 - Words: 3,196 - Reviews: 6 - Favs: 1 - Follows: 2 - Updated: 8/21 - Published: 7/26 - Rtas 'Vadumee, Youmu K., Rookie, Reimu H.
A Soldier's Odyssey by TheIronGiant reviews
Soldier and Wanderer stack bad guys and protect innocent civilians. In the aftermath of a cosmic rift, the Master Chief crash-lands on Earth, but not the one he knows. Issac is in need of a pro gunfighter to help liberate a slave camp. The slave camp is merely the surface layer of a tangled conspiracy that threatens to destroy what's left of humanity. War never changes.
Crossover - Fallout & Halo - Rated: M - English - Adventure/Mystery - Chapters: 1 - Words: 3,426 - Reviews: 3 - Favs: 8 - Follows: 10 - Published: 8/20 - Lone Wanderer, Dogmeat, Master Chief/John-117, Cortana
Spectre with a Spartan Sister by ZeBear reviews
In 2574, after the formation of the United Sentient Species Federation, they find more intelegent life. Having infiltrated the Normandy Project, they save John Shepard from dying after the Collectors attack at the end of Mass Effect 1. Neglecting to tell his friends. Now with and entire Federation of Species behind him, instead of Cerberus, how will John deal with it all?
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 5 - Words: 6,717 - Reviews: 10 - Favs: 38 - Follows: 67 - Updated: 8/20 - Published: 7/28 - [Shepard, Tali'Zorah] Garrus V.
Spartan and Astartes by Dragon Scripture reviews
War never changes be it in the 26th century or the 40th millennium
Crossover - Halo & Warhammer - Rated: T - English - Romance/Adventure - Chapters: 3 - Words: 3,947 - Reviews: 16 - Favs: 38 - Follows: 52 - Updated: 8/20 - Published: 7/24 - SPARTAN-B312/Noble Six, Space Marines
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: 103 - Follows: 108 - 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: 288 - Follows: 389 - 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: 18 - Follows: 29 - Updated: 8/14 - Published: 7/17 - OC, Aether, Paimon
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