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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: 10 - Follows: 16 - 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: 257 - 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: 20,556 - Reviews: 64 - Favs: 247 - Follows: 362 - 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: 7 - Follows: 9 - 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: 35 - Follows: 62 - 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
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 2 weeks. I have up to chapter 12 already written.
Crossover - Warhammer & Halo - Rated: M - English - Sci-Fi - Chapters: 9 - Words: 16,946 - Reviews: 73 - Favs: 254 - Follows: 366 - Updated: 8/17 - Published: 4/27
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: 28 - Words: 466,736 - Reviews: 718 - Favs: 852 - Follows: 1,020 - Updated: 8/16 - Published: 10/11/2022 - Luke S., Han S., Master Chief/John-117, T. Lasky
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: 283 - Follows: 385 - 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
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: 143 - Updated: 8/14 - Published: 2/7 - [Elster/LSTR-512, Ariane Yong] Master Chief/John-117, Cortana
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: 232 - Follows: 282 - 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: 28 - Favs: 76 - Follows: 114 - 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: 1,147 - Follows: 1,538 - Updated: 8/12 - Published: 11/25/2020 - OC, Master Chief/John-117, Cortana
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: 211 - Follows: 257 - 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: 9 - Follows: 12 - Published: 8/10 - A. J. Johnson, Arbiter
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: 18 - Follows: 25 - 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: 48 - Follows: 75 - 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: 275 - Follows: 411 - Updated: 8/8 - Published: 2/21/2022
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