Halo Crossovers
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We're Just People by TheFlawlessCowboy reviews
What if Master Chief and Cortana had a child. What if that child was named Jane Shepard. What if the UNSC and Turians didn't have a hostile first-contact. Pre first-contact to (hopefully) post Me-3. Pray for me ya'll this one's ambitious.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 2 - Words: 7,281 - Reviews: 17 - Favs: 49 - Follows: 65 - Updated: 4/10 - Published: 4/6 - Master Chief/John-117, Arbiter, Linda-058, Shepard
Book One: Harvest by Believer218 reviews
The year is 2583. Humanity stands strong, even twenty-six years after a disastrous first contact. But it seems that wherever they go, war will follow. And this war will grip the galaxy like no other. The first adventure of Mass Effect: The Reclaimer Saga. Rated M for graphic depictions of violence.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 9 - Words: 38,924 - Reviews: 126 - Favs: 138 - Follows: 197 - Updated: 4/9 - Published: 4/4/2024 - [Master Chief/John-117, Ashley W.] Arbiter, Saren A.
Master Chief in Remnant by Dark-Lightning XI reviews
Master Chief finds something in a strange world full of even strange new enemies called the Grimm. To make his adventure even more bizarre, he meets four teenage girls. One who won't stop fangirling. One who stop making bad puns and jokes. One who can't chill for a second and the last one...Blake being Blake.
Crossover - Halo & RWBY - Rated: K+ - English - Humor/Adventure - Chapters: 1 - Words: 2,389 - Reviews: 4 - Favs: 18 - Follows: 22 - Published: 4/9 - Master Chief/John-117, Team RWBY
HALO: Iunctus by JonathanO'Riley reviews
After drifting aboard the crippled Forward Unto Dawn for over four years, Master Chief and Cortana find themselves on a planet uncharted and untouched by the UNSC and former Covenant. Inhabited by an archaic civilization of Humans with strange abilities, this world hosts a new challenge. But hidden deep within, ancient secrets will reveal not all is as it seems. UNDER EDIT/REWRITE
Crossover - Halo & Naruto - Rated: T - English - Adventure/Sci-Fi - Chapters: 8 - Words: 39,680 - Reviews: 161 - Favs: 434 - Follows: 550 - Updated: 4/9 - Published: 11/30/2016 - Master Chief/John-117, Cortana, Naruto U.
HALO: Galactic Incursion by floodproof07 reviews
/First contact with an entity known as the Galactic Empire on our outer colony world of Charis proves hostile. Their colonization attempts have threated UNSC and Second Covenant citizens. The solution? Reclaim the Halo, enter Andromeda breach, and strike back. OPERATION: GALACTIC INCURSION./ 2561 - New Hope.
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 5 - Words: 24,464 - Reviews: 80 - Favs: 281 - Follows: 379 - Updated: 4/8 - Published: 10/16/2023 - Master Chief/John-117, Arbiter, Gravemind, OC
Operation: WASTELAND by Spartan-049 reviews
Stranded in a radioactive wasteland, a lone Spartan enters into a partnership with a courier he rescued from a shallow grave outside the small town of Goodsprings to track down the men that shot him, and the package they stole, even if it means travelling across the entirety of the Mojave.
Crossover - Fallout & Halo - Rated: T - English - Adventure/Western - Chapters: 2 - Words: 6,813 - Reviews: 4 - Favs: 5 - Follows: 13 - Updated: 4/8 - Published: 4/4
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: 15 - Words: 170,013 - Reviews: 636 - Favs: 1,719 - Follows: 2,255 - Updated: 4/8 - Published: 2/11/2023 - Cortana, Councilor Valern, Councilor Tevos, Councilor Sparatus
Unto the Starfield by Helljumper206 reviews
The war is over, but their story isn't. When the portal collapsed it didn't just send the back half of the Forward Unto Dawn into deep space, but to a different kind of starfield with system factions filled with contradicting hypocrisy. "M for harsh language, violence, and grown-up content."
Crossover - Halo & Starfield - Rated: M - English - Sci-Fi - Chapters: 3 - Words: 13,474 - Reviews: 20 - Favs: 45 - Follows: 66 - Updated: 4/7 - Published: 3/13 - Master Chief/John-117, Cortana
Halo: Universal Vortex by Legend of Flashfox reviews
With the rush of the firing of the rings errors occurred. More species come into play and humanity no longer started on Earth alone. The planet Elemental is here with humans who are different from Earth. Now Naruto needs to navigate this war torn galaxy. Alive preferably. Pairings maybe Harem. NarutoXHalo world merged with bits of others like Star Wars and Mass Effect. Maybe more.
Crossover - Halo & Naruto - Rated: M - English - Chapters: 75 - Words: 166,809 - Reviews: 304 - Favs: 476 - Follows: 541 - Updated: 4/6 - Published: 1/10/2022 - C. Halsey, Naruto U.
Into the Howling Dark by long night of solace reviews
Hundreds of millions of years ago, Humanity, Forerunners and the SanShyuum, the tier-1 species protected the galaxy. But the peace never lasted as the threat of flood and the reapers brought the Milkyway to the edge of extinction. Now the warriors of the past needs to guide the future galaxy and stop history from repeating itself.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 10 - Words: 92,962 - Reviews: 128 - Favs: 242 - Follows: 322 - Updated: 4/6 - Published: 10/23/2024 - Master Chief/John-117, Didact, D. Anderson, Shepard
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: 100 - Words: 583,680 - Reviews: 470 - Favs: 1,027 - Follows: 1,183 - Updated: 4/5 - Published: 9/30/2021 - [Harry P., Hermione G., Daphne G.] Master Chief/John-117
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: 36 - Words: 132,677 - Reviews: 226 - Favs: 164 - Follows: 191 - Updated: 4/5 - Published: 6/22/2022 - Master Chief/John-117, Amuro R.
Halo: Iron Kingdoms by jjimenez042v reviews
After the final battle of the ark, The Master Chief and Cortana found themselves on planet that mix steam-power technology with magic as great kingdoms fight each other supremacy. Force to adapt this new world they must forge alliance with unlikely people while dealing with strange enemies while they look for way home.
Crossover - Halo & Warmachine - Rated: M - English - Adventure/Sci-Fi - Chapters: 3 - Words: 18,193 - Reviews: 10 - Favs: 18 - Follows: 25 - Updated: 4/4 - Published: 3/16/2024
The Shinju Project by Orion1227 reviews
So I was listening to a Halo lore video and learned something new, everyone knows that Halo is heavily religious in theme. But what I learned is the main religion that the series is based after is Hinduism which is the basisof the Naruto universe… so yeah… enjoy this shit show.
Crossover - Naruto & Halo - Rated: M - English - Adventure/Sci-Fi - Chapters: 5 - Words: 12,791 - Reviews: 21 - Favs: 25 - Follows: 37 - Updated: 4/4 - Published: 12/16/2024 - Naruto U.
Never Forgotten by AlexisStormborn reviews
A long time ago, I met a man, a man that knew no fear. Even before my legions were released to conquer the stars, this man saved our kind from certain doom. Now, this man is the last hope of us once again. Rise, Spartan John, son of Eridanus, your duty is not yet done.
Crossover - Warhammer & Halo - Rated: M - English - Sci-Fi/Fantasy - Chapters: 2 - Words: 18,425 - Reviews: 21 - Favs: 70 - Follows: 90 - Updated: 4/3 - Published: 3/31 - The Emperor, Master Chief/John-117, Space Marines, Jerome-092
HALO-STARGATE: All the Stars in the Sky: Book I by Spartan-076A reviews
The UNSC will have to navigate a galaxy poised to rip itself apart between the ambitions of the System Lords and the scheming of the San'Shyuum Hierarchs. Will humanity triumph and rise victorious from these trials, or will it fall by the hands of its enemies? Only time will tell.
Crossover - Stargate: SG-1 & Halo - Rated: M - English - Sci-Fi - Chapters: 5 - Words: 24,825 - Reviews: 17 - Favs: 57 - Follows: 81 - Updated: 4/1 - Published: 8/1/2024 - S. Carter, Gen. Hammond, J. O'Neill, Master Chief/John-117
Acta Belli: A Journal of War by F35B reviews
A Chronicle to Bellum Terranum. Archives and lists the stories of those who suffered the conflict known as Bellum Terranum. From the Invasion of Strangreal to the Battle over Coruscant.
Crossover - Star Wars & Halo - Rated: T - English - Adventure/Sci-Fi - Chapters: 5 - Words: 13,312 - Reviews: 30 - Favs: 45 - Follows: 61 - Updated: 4/1 - Published: 3/20
Bellum Terranum Shitpost: April Fools Special by F35B reviews
Destroying Palpatine with Facts and Logic.
Crossover - Star Wars & Halo - Rated: M - English - Chapters: 1 - Words: 4,742 - Reviews: 3 - Favs: 5 - Follows: 3 - Published: 4/1
Bellum Terranum by F35B reviews
The Republic after finding a small planet on the edge of their space, is introduced to the Milky Way. For 15 years there was an unstable peace. However War is indeed inevitable and the Republic, after an incident over a Terran Colony, began its invasion. But Terrans do not go quietly. These are the stories of those who fought the war which will be known as... Bellum Terranum.
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi - Chapters: 9 - Words: 79,133 - Reviews: 344 - Favs: 603 - Follows: 786 - Updated: 3/31 - Published: 1/3/2023 - OC
The Spartan of the Planet of the Apes by Scepter 2-1 actual reviews
It's been years since Noble Six and Auntie Dot found themselves in an alternate Earth being ravaged by a deadly plague. Now, a new threat emerges in the form of evolved and highly intelligent apes. Can Six and Dot ensure mankind's dominance? Or will they fall in the wake of the Ape uprising? Cover image does not belong to me.
Crossover - Planet of the Apes & Halo - Rated: T - English - Adventure/Drama - Chapters: 10 - Words: 36,865 - Reviews: 90 - Favs: 148 - Follows: 187 - Updated: 3/31 - Published: 11/23/2023 - Caesar, SPARTAN-B312/Noble Six
Galactic Conflicts: Tales of First Contact by TheDoctor1998 reviews
Humanity and its allies have stood strong after the Great War with the Covenant. Follow the Systems Alliance as it goes through a first contact nearly as disastrous as the one that lead to the Great War.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 20 - Words: 116,178 - Reviews: 482 - Favs: 659 - Follows: 912 - Updated: 3/30 - Published: 2/6/2023
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: 19 - Words: 136,135 - Reviews: 142 - Favs: 286 - Follows: 343 - Updated: 3/30 - Published: 8/24/2023 - Master Chief/John-117, Arbiter, 343 Guilty Spark, C. Halsey
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: 5 - Words: 17,056 - Reviews: 32 - Favs: 143 - Follows: 160 - Updated: 3/29 - Published: 8/5/2023
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: 9 - Words: 34,836 - Reviews: 115 - Favs: 299 - Follows: 381 - Updated: 3/29 - Published: 6/24/2019 - T. Lasky, S. Carter
Sins Of A Galactic Empire Reborn by zzzxxc1 reviews
When the Milky Way is revealed to the universe at large by a derelict CIS warship, the UEG are forced to become members of the transgalactic community, but its existence is soon threatened by the decline of the Republic, and the rise of an Empire. Adopted from SpaceCowboy2013.
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi - Chapters: 25 - Words: 214,152 - Reviews: 1193 - Favs: 2,265 - Follows: 2,811 - Updated: 3/28 - Published: 7/28/2018 - Anakin Skywalker, Obi-Wan K., Master Chief/John-117, Cortana
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