Halo Crossovers
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Reclaimers of Both Worlds by Little Freddy Stories
After a life threatening battle against the Covenant, Noble Six makes his last stand until a strange event occurred. Bringing the two worlds more closer than what is initially thought when a boy from the other side starts feeling the side effects of such an event. AU of a what if to the two IP's, first published story on this website so any feedback is heavily welcomed.
Crossover - Halo & Please don't bully me, Nagatoro/イジらないで、長瀞さん - Rated: T - English - Sci-Fi/Romance - Chapters: 1 - Words: 6,089 - Published: 8m - SPARTAN-B312/Noble Six
Hyper Lethal Pups by TheManThatWalksTheAbyss115 reviews
A little short story about the little ones of a certain Hyper Lethal Vector
Crossover - Halo & RWBY - Rated: T - English - Family/Hurt/Comfort - Chapters: 4 - Words: 9,270 - Reviews: 53 - Favs: 121 - Follows: 118 - Updated: 10h - Published: 2/26/2022
The Sword of the Geth by Doctor poo and the TURDIS reviews
Dying on Mantle's Approach, Cortana wakes up in an unfamiliar environment. In her drive to get home, she 'employs' the assistance of the local synthetics. She never wanted to be a galactic overlord. But a UNSC AI in an environment woefully unprepared for one of her caliber makes an easy one.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Humor - Chapters: 20 - Words: 103,845 - Reviews: 452 - Favs: 877 - Follows: 1,233 - Updated: 14h - Published: 11/23/2023 - Cortana, Shepard
A Huntress In A Demon's World by Rajin Kaijun reviews
Awakening on a strange ringworld occupied by The Banished hellbent on destroying humanity, Ruby Rose joins the Master Chief and his new AI companion in hopes to not only defeat this new threat but also finding a way back to Remnant. This isn't Remnant anymore, she has to play by Halo's rules. (Slight AU Infinite)
Crossover - Halo & RWBY - Rated: M - English - Sci-Fi/Adventure - Chapters: 7 - Words: 28,914 - Reviews: 25 - Favs: 113 - Follows: 172 - Updated: 16h - Published: 8/9/2022 - Master Chief/John-117, Ruby R., Atriox, Cortana
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: 89 - Words: 455,365 - Reviews: 378 - Favs: 790 - Follows: 927 - Updated: 1/11 - Published: 9/30/2021 - [Harry P., Hermione G., Daphne G.] Master Chief/John-117
The Exiles:A New Power by Johnnieboy11 reviews
The beginning of the Battle For Earth signaled the start of the final, bloodiest campaign of the Human-Covenant War. Hastily, a plan is put into motion and an Ark Fleet, composed of a dozen Phoenix-class vessels and their escorts, makes the jump out of system. Either interference, or malfunction, causes their arrival to a new Galaxy, where new threats lurk just around the corner.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 14 - Words: 54,995 - Reviews: 244 - Favs: 807 - Follows: 1,198 - Updated: 1/10 - Published: 12/26/2021 - OC, Tali'Zorah, Admiral Hackett, Rael'Zorah
Always Be a Good Boy by Anquietas reviews
A Spartan and his A.I. companion will stumble across the Colonies of Kobol just a few days before the Cylon attack. That is where our story will truly begin.
Crossover - Halo & Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi/Adventure - Chapters: 7 - Words: 37,703 - Reviews: 25 - Favs: 44 - Follows: 59 - Updated: 1/10 - Published: 12/26/2023 - OC, W. Adama, L. Adama/Apollo, K. Thrace/Starbuck
The Rook by Twisted Fate MK 2 reviews
On the way down to New Mombasa, Rookie falls into the Slipspace Rupture and ends up crashing down on Menae, high above Palaven, right in the midst of the Reaper War. From there, the war itself will shift and the fighting persists, but who knows what an ODST will add to the mix. (Redo of an older story)
Crossover - Halo & Mass Effect - Rated: M - English - Adventure - Chapters: 15 - Words: 52,880 - Reviews: 127 - Favs: 472 - Follows: 704 - Updated: 1/10 - Published: 7/8/2022 - Rookie, Shepard
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 Republic warships and the Malevolence. Soon the Didact’s release approaches, and The Chief soon discovers that he is not the only Spartan on this side of the universe. But secretly, Lord Sidious has plans to expand his chessboard to reach both worlds…
Crossover - Halo & Star Wars: The Clone Wars - Rated: T - English - Sci-Fi/Adventure - Chapters: 6 - Words: 22,276 - Reviews: 41 - Favs: 104 - Follows: 120 - Updated: 1/8 - Published: 4/12/2023 - Master Chief/John-117, General Grevious, Count Dooku, Jorge-052/Noble Five
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: 53 - Words: 218,633 - Reviews: 1818 - Favs: 1,751 - Follows: 2,102 - Updated: 1/8 - Published: 11/17/2020 - Kurt-051, Lucy-B091, Tom-B292, Tywin L.
Halo: el combate ha evolucionado by Naruto elite covenant reviews
Gaara del desierto, actualmente mejor conocido como el Jefe Maestro, está en una misión casi suicida para salvar a los tripulantes del barco-nave destructor menor conocida como Pilar de otoño. Él llego del mundo shinobi a estar en un conflicto entre dos superpotencias en una dimensión diferente a la suya. UA/pseudoshinobi.
Crossover - Halo & Naruto - Rated: T - Spanish - Adventure - Chapters: 8 - Words: 22,846 - Reviews: 1 - Favs: 2 - Follows: 5 - Updated: 1/7 - Published: 9/12/2013 - Gaara
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: 5 - Words: 40,780 - Reviews: 151 - Favs: 316 - Follows: 373 - Updated: 1/7 - Published: 7/3/2023 - SPARTAN-B312/Noble Six, Elena G., Stefan S., Bonnie B.
The Remnant Lost Soul of HALO by Vorhard156 reviews
The war between humanity and the Covenant has entered its highest point. Desperate for help to ensure humanity's survival, a group of expedition vessels make a course into the most bizarre place in the galaxy-a place where time and space seemingly all but destroyed. In search of salvation, they find their answer, but that answer is beyond any of their mortal minds to comprehend.
Crossover - Warhammer & Halo - Rated: T - English - Sci-Fi - Chapters: 3 - Words: 9,419 - Reviews: 9 - Favs: 31 - Follows: 40 - Updated: 1/7 - Published: 12/29/2023
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: 23 - Words: 83,912 - Reviews: 255 - Favs: 460 - Follows: 592 - Updated: 1/6 - Published: 11/29/2022 - Master Chief/John-117, Cortana, Commander, Rapi
Halo Gundam by 6-4 pilot reviews
Stuck in the Universal Century during the One Year War, Master Chief and his companions help the White Base Crew survive while also trying to find a way back to Zeta Halo. In the meantime, a group of battle-hardened Banished troops does what their organization does best. Take advantage of conflicts and various organizations for their own benefit. (Also includes Owl House)
Crossover - Halo & Gundam UC - Rated: M - English - Sci-Fi - Chapters: 33 - Words: 123,815 - Reviews: 207 - Favs: 124 - Follows: 148 - Updated: 1/4 - Published: 6/22/2022 - Master Chief/John-117, Amuro R.
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: 8 - Words: 68,283 - Reviews: 63 - Favs: 155 - Follows: 195 - Updated: 1/2 - Published: 8/24/2023 - Master Chief/John-117, Arbiter, 343 Guilty Spark, C. Halsey
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: 27 - Words: 150,741 - Reviews: 166 - Favs: 327 - Follows: 478 - Updated: 1/2 - Published: 2/21/2022
The Pegasus Intervention by kaln7 reviews
With the Covenant war over the UNSC can finally begin exploring the universe, but there first step outside their galaxy could lead them to another enemy that would prefer to feed on them instead of destroying them, can one ship survive in a galaxy teaming with an overwhelming enemy or will they get help from a group of humans who are also exploring the universe themselves.
Crossover - Halo & Stargate: Atlantis - Rated: T - English - Sci-Fi/Adventure - Chapters: 17 - Words: 141,950 - Reviews: 163 - Favs: 349 - Follows: 430 - Updated: 1/1 - Published: 4/7/2017
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: 6 - Words: 24,720 - Reviews: 47 - Favs: 101 - Follows: 131 - Updated: 12/31/2023 - Published: 9/8/2023 - Rodney M., John S., OC
A Gold Flower by CplMax43 reviews
A flower cannot blossom without sunshine. And where flowers boom, so can hope.
Crossover - Warhammer & Halo - Rated: M - English - Sci-Fi/Adventure - Chapters: 1 - Words: 6,222 - Reviews: 5 - Favs: 28 - Follows: 31 - Published: 12/31/2023 - Daisy-023
Brotherhood of Steel:Chronicles of the 86th UNSC Assault Corps by Johnnieboy11 reviews
A veteran fleet formed of the few survivors of Reach goes missing upon their jump toward Earth. Originally meant to reinforce the Home Fleet with a slew of fresh units, the dozen vessels now find themselves over a foreign world engaged in a familiar war of survival with a rogue army of AI and their own prejudices against each-other. A new world to protect and new challenges await.
Crossover - Halo & 86 エイティシックス - Rated: T - English - Sci-Fi/Adventure - Chapters: 27 - Words: 236,000 - Reviews: 189 - Favs: 377 - Follows: 435 - Updated: 12/31/2023 - Published: 11/1/2021 - OC, Vladilena Milizé/Lena, Shinei Nouzen, Theo Rikka
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: 3 - Words: 7,892 - Reviews: 15 - Favs: 74 - Follows: 91 - Updated: 12/30/2023 - Published: 8/5/2023
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: 45 - Words: 157,148 - Reviews: 86 - Favs: 204 - Follows: 252 - Updated: 12/30/2023 - Published: 7/15/2023 - Space Marines, OC, Arbiter, Linda-058
Only in Death Does Duty End by Cypher1597 reviews
Spartans are instruments of war. They are molded, shaped, and bred to spill the blood of humanities countless enemies in the defense of mankind. They are not peacekeepers. They are not peacemakers. But duty alone will force a single Spartan to uphold a fragile peace or watch everything humanity could one day achieve burn. On the blood of their fathers and the blood of their sons.
Crossover - Halo & High School DxD/ハイスクールD×D - Rated: M - English - Supernatural/Suspense - Chapters: 4 - Words: 29,297 - Reviews: 30 - Favs: 142 - Follows: 192 - Updated: 12/29/2023 - Published: 12/3/2023 - OC
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: 3 - Words: 13,450 - Reviews: 30 - Favs: 123 - Follows: 143 - Updated: 12/28/2023 - Published: 9/13/2023 - [Suletta M., Miorine R.] Master Chief/John-117, Cortana
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