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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: 23 - Words: 65,851 - Reviews: 104 - Favs: 137 - Follows: 159 - Updated: 12h - Published: 1/30/2021 - Neo-Queen Serenity, OC
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: 39 - Words: 156,242 - Reviews: 387 - Favs: 498 - Follows: 642 - Updated: 12h - Published: 11/29/2022 - Master Chief/John-117, Cortana, Commander, Rapi
Under A New Sky by Johnnieboy11 reviews
Crash-landed upon an alien world after awakening from Cryo-Sleep, the Master Chief and his partner, Cortana, find themselves stuck on one of the weirdest mashes of society known to man. A 'RimWorld', a human world at the edge of known space, lost and occupied by multiple factions. The Chief and any new allies he finds must navigate this weird place in hope of finding a way off.
Crossover - Halo & RimWorld - Rated: T - English - Adventure/Sci-Fi - Chapters: 2 - Words: 7,241 - Reviews: 6 - Favs: 33 - Follows: 41 - Updated: 18h - Published: 2/19 - Master Chief/John-117, Cortana, Cassandra C.
On the Illusion of Might by evevee reviews
We thought ourselves powerful, able to conquer a galaxy with nothing but toys. When we overcame every challenge, breached the space between the galaxies themselves, what use were the words of a race ashamed of their own past? Yet we cannot deny that we were warned, for while a challenge to a human is laughable, a challenge to humanity is a death sentence.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 28 - Words: 308,369 - Reviews: 2179 - Favs: 4,059 - Follows: 5,062 - Updated: 18h - Published: 2/21/2017 - Master Chief/John-117, Cortana, Garrus V., Shepard
Roses and Violets by Gashadokur0 reviews
Ever heard of a giant Megacorp falling down from the sky? Neither did Night City. Until a suriving group of UNSC came down with a mishmash of a UNSC Carrier ship. That certainly gave Night City something to talk about for months. (Inspired by both the main Halo series and Red vs Blue)
Crossover - Halo & Cyberpunk 2077 - Rated: T - English - Humor/Sci-Fi - Chapters: 6 - Words: 14,418 - Reviews: 9 - Favs: 36 - Follows: 53 - Updated: 23h - Published: 1/26
Nier: Great Journey by RamPluto reviews
Finding herself on an unknown ringworld, alone save for her Pod, 2B finds herself thrusted into the middle of an unknown and seemingly intergalactic conflict. With the aid of the Master Chief, 2B will find herself dealing with two worlds, one where Humanity is extinct and the other where war is a constant ever looming threat, to all of mankind and existence itself.
Crossover - Halo & Nier - Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 4,298 - Reviews: 6 - Favs: 26 - Follows: 39 - Published: 2/20 - Master Chief/John-117, 2B, Cortana, 9S
Stargate:Spartan Siege by Johnnieboy11 reviews
After the battle on Mantle's Approach, the Chief finds himself, alongside a non-rampant Cortana, helping the Humans of a galaxy similar, yet different to his own, battle their enemies, while exploring the countless worlds tied together by a network of ancient portals and uncovering the mysteries surrounding these worlds.
Crossover - Stargate: SG-1 & Halo - Rated: T - English - Adventure/Sci-Fi - Chapters: 15 - Words: 66,294 - Reviews: 220 - Favs: 544 - Follows: 756 - Updated: 2/20 - Published: 12/24/2020 - D. Jackson, J. O'Neill, Teal'c, Master Chief/John-117
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: 12 - Words: 120,610 - Reviews: 507 - Favs: 1,388 - Follows: 1,883 - Updated: 2/19 - Published: 2/11/2023 - Cortana, Councilor Valern, Councilor Tevos, Councilor Sparatus
The Dragon Reclaimer by deeginator2 reviews
Something went wrong when Natsu and Wendy entered the Eclipse Gate. Instead of being sent to the future they were instead sent to another universe. Natsu ended up on Eridanus II while Wendy ended up on Reach. They both became Spartans Natsu became the Master Chief and Wendy became Noble 6. Now thanks to the death of the dark lord they made it back home. This is an AU Natsuxharem.
Crossover - Fairy Tail & Halo - Rated: M - English - Adventure/Fantasy - Chapters: 2 - Words: 11,639 - Reviews: 7 - Favs: 28 - Follows: 39 - Updated: 2/19 - Published: 9/20/2022 - [Natsu D., Wendy M., Erza S., Mirajane S.]
The Path of the Savior by Johnnieboy11 reviews
Trapped in another variation of the Milky Way Galaxy after the Fall of Cadia caused the opening of the Cicatrix Maledictum, a minor Eldar Craftworld finds itself stuck in a war between a humanity on the brink of extinction and an alien alliance hell-bent on ending them and the Humans. Unlikely alliances form, friendships are built and the face of the Galaxy will forever be changed
Crossover - Warhammer & Halo - Rated: M - English - Sci-Fi/Adventure - Chapters: 12 - Words: 46,342 - Reviews: 191 - Favs: 611 - Follows: 826 - Updated: 2/19 - Published: 8/12/2019 - Eldar, Master Chief/John-117, A. J. Johnson, OC
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: 10 - Words: 79,843 - Reviews: 76 - Favs: 176 - Follows: 218 - Updated: 2/19 - Published: 8/24/2023 - Master Chief/John-117, Arbiter, 343 Guilty Spark, C. Halsey
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: 25 - Words: 122,147 - Reviews: 57 - Favs: 190 - Follows: 233 - Updated: 2/19 - Published: 2/7/2023 - [Elster/LSTR-512, Ariane Yong] Master Chief/John-117, Cortana
Legacy by WisdomOfCelestials reviews
Keys, Answers, Questions, Doors. What starts, What ends? Lord of Admirals, Lord of Beggars. Time and Un-Time
Crossover - Halo & Mass Effect - Rated: T - English - Chapters: 1 - Words: 9,021 - Reviews: 11 - Favs: 50 - Follows: 52 - Published: 2/19
The UNSC and her allies by Xenofoxwolf reviews
what happens when a multiversal entity decides to save several species from Extinction by pulling them from their original realities? what happens when those species get dropped around the UNSC before the human Covenant war during the insurrection?
Crossover - Halo & Mass Effect - Rated: M - English - Adventure - Chapters: 1 - Words: 2,975 - Reviews: 9 - Favs: 22 - Follows: 36 - Published: 2/18
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: 8 - Words: 46,624 - Reviews: 146 - Favs: 430 - Follows: 461 - Updated: 2/18 - Published: 3/22/2023 - Letty, Mia, SPARTAN-B312/Noble Six
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: 21 - Words: 84,860 - Reviews: 155 - Favs: 642 - Follows: 806 - Updated: 2/18 - Published: 3/23/2023 - Anakin Skywalker, Ahsoka T., Master Chief/John-117, T. Lasky
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: 39 - Words: 177,819 - Reviews: 368 - Favs: 398 - Follows: 531 - Updated: 2/18 - Published: 9/20/2022 - Samus A., Adam, Master Chief/John-117, Cortana
Halo Wars: New Fight by Mr. X-Ray reviews
Captain Cutter was planning his operation on the Ark when suddenly a ship appeared out of nowhere. What will happen when a crew of the Spirit of fire discover a galaxy far far away ?
Crossover - Star Wars & Halo - Rated: T - English - Adventure - Chapters: 2 - Words: 5,657 - Reviews: 8 - Favs: 30 - Follows: 45 - Updated: 2/18 - Published: 2/15 - Anakin Skywalker, Aayla S., Ahsoka T., J. Cutter
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. Please ignore the latest review. I have blocked that user for insulting words and feelings i do not support.
Crossover - Warhammer & Halo - Rated: T - English - Adventure/Romance - Chapters: 50 - Words: 184,074 - Reviews: 90 - Favs: 224 - Follows: 270 - Updated: 2/17 - Published: 7/15/2023 - Space Marines, OC, Arbiter, Linda-058
Redemption by The Ashen One reviews
Six believed his body belonged to Reach after fighting tooth and nail to defend the planet from the Covenant. However, fate has other plans for the spartan as he soon arrives on a strange world, where he encounters a stubborn woman named Korra.
Crossover - Halo & Legend of Korra - Rated: M - English - Adventure/Romance - Chapters: 7 - Words: 25,035 - Reviews: 21 - Favs: 95 - Follows: 147 - Updated: 2/17 - Published: 1/20 - [Korra, SPARTAN-B312/Noble Six]
Welcome to the Jungle by Mark Nutt 2014 reviews
In the wake of Reach's destruction at the hands of the Covenant a new Spartan team, Gold Team, is formed. During their transfer to Nassau Station a freak slipspace anomaly occurs, sending the team through space and time. Crash landing back on Earth, the team finds the human home world no longer under human control. (Unable to upload due to corruption, updated on AO3)
Crossover - Halo & Beastars/ビースターズ - Rated: M - English - Adventure - Chapters: 29 - Words: 96,760 - Reviews: 40 - Favs: 81 - Follows: 88 - Updated: 2/17 - Published: 8/31/2020 - Legosi, Yafya
Halos, Bullets and Buckshot:The Human-Covenant War by Johnnieboy11 reviews
After discovering a strange artifact in the abandoned Abydos Desert, the girls of the Foreclosure Task Force mistakenly activate it, sending themselves to a new and alien reality, one where humanity is in the brink as an Alien Armada bears down upon her worlds and death looms ever so close to them. Their hope for survival now rests on their own skill, a little luck... And the Halos
Crossover - Halo & Blue Archive - Rated: M - English - Sci-Fi/Horror - Chapters: 2 - Words: 9,430 - Reviews: 9 - Favs: 48 - Follows: 56 - Updated: 2/17 - Published: 2/15 - Master Chief/John-117, A. J. Johnson, SPARTAN-B312/Noble Six, OC
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: 5 - Words: 20,192 - Reviews: 37 - Favs: 35 - Follows: 42 - Updated: 2/16 - Published: 7/19/2023 - SPARTAN-B312/Noble Six, Marcus F., Anya S.
The Persean War by Johnnieboy11 reviews
In a split-second, reality becomes completely different than what one was used to. Though, the more some things change, the more they stay the same. War remained a constant in the Persean Sector, even as a fragile peace and a tenuous alliance formed, the Remnant, Ancient AIs of the Old War, struck at one of the nations, causing a shift that will ripple throughout a new world.
Crossover - Halo & Starsector - Rated: T - English - Sci-Fi/Supernatural - Chapters: 3 - Words: 12,420 - Reviews: 16 - Favs: 65 - Follows: 96 - Updated: 2/15 - Published: 6/26/2023 - Master Chief/John-117, A. J. Johnson, C. Halsey, Cortana
The bloody Hare by Lighting wolf knight
In a reality where the nails never existed... Comes the Eater of Worlds and his sons... To free the galaxy from their shackles. Rated T for violence, death and profanity.
Crossover - Warhammer & Halo - Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 848 - Favs: 5 - Follows: 7 - Published: 2/13 - Khârn the Betrayer, Kelly-087, OC
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