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Battlestar UNSC by StarDude117 reviews
Reach is under attack when the orders come down the line for all UNSC assets to rally at Reach in defense for the last bastion before Earth Task force Midway's Survivors answer the call however unknown to them in a different dimension the Twelve colonies of Kobol are under attack and they are losing see how the sudden appearance of a small UNSC task force changes things better
Crossover - Halo & Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi/Adventure - Chapters: 72 - Words: 122,532 - Reviews: 252 - Favs: 141 - Follows: 213 - Updated: 2h - Published: 10/18/2024 - OC, W. Adama, S. Tigh, Gaeta
HALO: Crossing Paths by Connor Winters reviews
I have recently re-watched star Trek ds9 and had a thought of how the story change if instead of the federation, it was the unsc.
Crossover - StarTrek: Deep Space Nine & Halo - Rated: M - English - Sci-Fi/Adventure - Chapters: 3 - Words: 4,660 - Reviews: 8 - Favs: 9 - Follows: 15 - Updated: 6h - Published: 4/3
Merged Stars by Lord of the Wall reviews
Through unknown forces of immense and unimaginable power, two galaxies merge and superpowers of both galaxies is forced to deal with the reality of the broken status quo. Jane Shepard, first human Spectre, finds herself in the center of the events to come. This is a 3-way crossover between the forementioned ME and Halo universes as well as Stargate. Knowledge of all are not needed.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Family - Chapters: 5 - Words: 28,970 - Reviews: 28 - Favs: 110 - Follows: 148 - Updated: 4/16 - Published: 3/20 - Master Chief/John-117, T. Hood, Atriox, Shepard
A different journey by Dragon Cat84 reviews
The Master Chief is found by the Atlantis Expedition, how did the Master Chief end up in the early 21st Century and in the Pegasus Galaxy?
Crossover - Halo & Stargate: Atlantis - Rated: T - English - Chapters: 13 - Words: 47,311 - Reviews: 67 - Favs: 106 - Follows: 164 - Updated: 4/15 - Published: 3/24/2024
The Halo Wars by Starcraft855 reviews
After the Human-Covenant War, at a reterraformed Reach, a mysterious ship arrives: unknown design, unknown insignia, unknown how he ended up at Reach Note 1: mild violence and a few less liked words: e.g. "hell" Note 2: The crossover may take awhile... due to me wanting Noble Six(Male, 22) and Sergeant Major Avery Johnson alive Note 3: Enjoy, please do be civil with your critiquing
Crossover - Halo & Star Wars - Rated: T - English - Chapters: 1 - Words: 2,184 - Reviews: 4 - Favs: 2 - Follows: 5 - Published: 4/15
Rose Empire Space Command by Apatima reviews
The Beginning of a new Era for the Milky Way Galaxy, with the assistance of the Forerunners and new allies along the way, the Rose Empire will stand tall above all and build a Empire for Peace and Justice to flourish.
Crossover - Halo & RWBY - Rated: M - English - Adventure/Sci-Fi - Chapters: 5 - Words: 24,913 - Reviews: 2 - Favs: 23 - Follows: 31 - Updated: 4/14 - Published: 7/15/2024 - Master Chief/John-117, J. Cutter, Team RWBY, Team STRQ
The Hyper-Lethal Driver by Ranger2287 reviews
After a failed slip-space jump, Master Chief and Cortana crash-land in Morytha, a desolate realm in Xenoblade Chronicles 2. Their arrival doesn't go unnoticed, as the shockwaves of their entry send ripples across Alrest, leaving a profound impact on its inhabitants.
Crossover - Halo & Xenoblade Chronicles 2 - Rated: M - English - Adventure - Chapters: 12 - Words: 87,115 - Reviews: 40 - Favs: 81 - Follows: 104 - Updated: 4/14 - Published: 8/17/2022 - Master Chief/John-117, Cortana, KOS-MOS, T-elos
The Demon Of The Nine-Nine by SSJ Lone Wolf reviews
It had been ten years since Noble Six joined the NYPD, following the fall of Reach, quickly moving through the ranks and making detective, but when he is transferred to the 99th precinct, he finds his life flipped upside down when he has to work alongside the eccentric squad of the Nine-Nine. If his past doesn't drive him insane...they certainly will!
Crossover - Halo & Brooklyn Nine-Nine - Rated: M - English - Chapters: 26 - Words: 227,385 - Reviews: 985 - Favs: 1,218 - Follows: 1,342 - Updated: 4/14 - Published: 10/5/2021 - [SPARTAN-B312/Noble Six, Amy S, Rosa D.]
Sekirei: The Lost Wolf by Helghast honored guard reviews
The Lonewolf survived and made it off Reach .Now he finds himself trapped in another world, another time and another conflict. Up against a madman forcing a race of super powered aliens to fight to the death to bring a new age of the gods . (Six and Harem)
Crossover - Halo & Sekirei - Rated: M - English - Sci-Fi/Romance - Chapters: 15 - Words: 158,138 - Reviews: 178 - Favs: 547 - Follows: 701 - Updated: 4/14 - Published: 3/2/2022 - SPARTAN-B312/Noble Six, No. 12/Hibiki, No. 11/Hikari, No. 16/Toyotama
Broken Promises by Halgen reviews
She lost her entire world, his world lost him. One left frozen in time, one sent to die. Both have promised, neither forgot. Which promise shall last?
Crossover - Halo & SIGNALIS - Rated: M - English - Sci-Fi/Horror - Chapters: 2 - Words: 5,829 - Reviews: 2 - Favs: 7 - Follows: 17 - Updated: 4/13 - Published: 4/11 - Master Chief/John-117, Cortana, Elster/LSTR-512, Ariane Yong
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: 67 - Words: 287,435 - Reviews: 596 - Favs: 765 - Follows: 931 - Updated: 4/13 - Published: 11/29/2022 - Master Chief/John-117, Cortana, Commander, Rapi
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: 106 - Words: 1,223,680 - Reviews: 319 - Favs: 632 - Follows: 679 - Updated: 4/13 - Published: 9/29/2020 - Sole Survivor, Arthur Maxson, Shaun, OC
Starting a new faction in the Halo universe with StarCraft Technology by CaptainKriss S5-SIERRA-117 reviews
Jean Razak just a regular normal young adult with a balanced lifestyle between gaming,study and work. Somehow out of nowhere he was transported to another planet with similar environments to earth. He gained power called [SYSTEM] to summon the StarCraft Terran faction unit. Can he survive and return to his original home
Crossover - Halo & StarCraft - Rated: T - English - Sci-Fi/Parody - Chapters: 11 - Words: 37,175 - Reviews: 14 - Favs: 101 - Follows: 120 - Updated: 4/13 - Published: 3/29/2024
Alpha Nine to Copper Nine by CambrianSun reviews
2552. Humanity is at war with an alien alliance known as 'The Covenant' We are losing. In an attempt to assault the carrier of one of the Covenant's leadership. The carrier jumps into slipspace above New Mombasa. Those whom survive the blast find themselves on a new, dangerous, frozen world.
Crossover - Halo & Murder Drones - Rated: M - English - Sci-Fi/Horror - Chapters: 12 - Words: 43,218 - Reviews: 19 - Favs: 43 - Follows: 62 - Updated: 4/12 - Published: 8/25/2024
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: 42 - Words: 148,773 - Reviews: 246 - Favs: 708 - Follows: 1,007 - Updated: 4/12 - Published: 7/8/2022 - Rookie, Shepard
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: 19 - Words: 82,676 - Reviews: 274 - Favs: 720 - Follows: 959 - Updated: 4/12 - Published: 12/24/2020 - D. Jackson, J. O'Neill, Teal'c, Master Chief/John-117
Homefront by Cipher32 reviews
For what is a child if not innocent, and what is a man if not sinful? A vessel of hate, unbridled and pure. And we are the best of teachers to our child.
Crossover - Halo & Girls' Frontline/少女前线 - Rated: M - English - Sci-Fi/Drama - Chapters: 4 - Words: 41,328 - Reviews: 4 - Favs: 35 - Follows: 47 - Updated: 4/11 - Published: 2/9 - Griffin Commander, M4 SOPMOD II, RO635, OC
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: 48 - Follows: 64 - 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: 16 - Follows: 19 - 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: Dark Stars 2-There'll be another time by Ash Maelstrom reviews
AU/FUSION FIC. Part 2 of a series! After a harrowing incident at Capella, local UNSC forces and their strange new guests are left struggling to pick up the pieces as a relief force heads over. But events elsewhere are already moving too quickly, and soon another band of unlikely heroes will learn that nothing, no matter how legendary, is truly out of reach…
Crossover - Halo & Kantai Collection - Rated: T - English - Sci-Fi/Horror - Chapters: 7 - Words: 41,937 - Reviews: 3 - Favs: 6 - Follows: 8 - Updated: 4/9 - Published: 3/10 - M. Stanforth
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: 23,073 - Reviews: 80 - Favs: 280 - Follows: 377 - 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: 635 - Favs: 1,715 - Follows: 2,250 - Updated: 4/8 - Published: 2/11/2023 - Cortana, Councilor Valern, Councilor Tevos, Councilor Sparatus
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