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The Fifth-Race Reclaimers by Piero217 reviews
The Four Great Races once watched over thousands of worlds… but only one species was destined to inherit their place. Now, as an ancestral enemy rises from the ashes and threatens all life as we know it, humans from two different universes must learn to overcome their differences and stand together to reclaim the Mantle of Responsibility. Set shortly after the events of Spartan Ops
Crossover - Halo & Stargate: Atlantis - Rated: T - English - Sci-Fi/Adventure - Chapters: 27 - Words: 167,306 - Reviews: 277 - Favs: 480 - Follows: 496 - Updated: 2/9 - Published: 6/1/2013 - Master Chief/John-117, C. Halsey, Cortana, John S. - Complete
SGU: Season 3 (Spin-off to The Fifth-Race Reclaimers) by Piero217 reviews
After a three-year long journey through FTL, Young and Rush are awakened by Eli only to receive some very distressing news. But just when all hope seems lost, a group of newcomers comes along who claim to be allied with the SGC—and capable of restoring Destiny. Too good to be true? Only time will tell. (Written in collaboration with AdmiralWhiteFang)
Crossover - Halo & Stargate: Universe - Rated: T - English - Sci-Fi/Drama - Chapters: 4 - Words: 39,883 - Reviews: 23 - Favs: 97 - Follows: 133 - Updated: 2/9 - Published: 9/22/2019 - OC, Eli W., Dr. N. Rush, Col. E. Young
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: 80 - Words: 942,030 - Reviews: 222 - Favs: 473 - Follows: 515 - Updated: 2/9 - Published: 9/29/2020 - Sole Survivor, Arthur Maxson, Shaun, OC
Men and Machines by 1DL1NG KN1GHT reviews
Spartan 117 wakes up from the Dawn to a battle of unknown factions. The Separatists outreach with a hand of peace, forever tainting the future of the Clone Wars. But now 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 this new-found UNSC.
Crossover - Halo & Star Wars: The Clone Wars - Rated: T - English - Sci-Fi/Adventure - Chapters: 8 - Words: 31,477 - Reviews: 49 - Favs: 119 - Follows: 146 - Updated: 2/8 - Published: 4/12/2023 - Master Chief/John-117, General Grevious, Count Dooku, Jorge-052/Noble Five
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: 90 - Words: 464,601 - Reviews: 387 - Favs: 820 - Follows: 958 - Updated: 2/8 - Published: 9/30/2021 - [Harry P., Hermione G., Daphne G.] Master Chief/John-117
World Eater by ArmadaScream reviews
Remnant is a land full of dangers. Filled with dark creatures, heartless beasts and vicious evil. Yet even so the world keeps turning and its inhabitants live their day to day life. But now an extraterrestrial plague has found its way onto the planet Remnant, and the Flood is coming.
Crossover - Halo & RWBY - Rated: T - English - Suspense/Adventure - Chapters: 5 - Words: 49,619 - Reviews: 48 - Favs: 56 - Follows: 81 - Updated: 2/7 - Published: 11/19/2023 - Team RWBY, Ozpin, Pyrrha N., Gravemind
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: 28 - Words: 155,737 - Reviews: 173 - Favs: 339 - Follows: 498 - Updated: 2/7 - Published: 2/21/2022
A Whole New World by Spartan III Commando reviews
Noble six's story did not end on Reach, he escaped the doomed planet after saving the Pillar of Autumn, and he and 117 fought across each Halo, until an incident sent him to a whole new world. And he is wholly unprepared for the journey in store.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 13 - Words: 57,417 - Reviews: 79 - Favs: 409 - Follows: 582 - Updated: 2/7 - Published: 7/7/2016 - SPARTAN-B312/Noble Six
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: 6 - Words: 19,834 - Reviews: 16 - Favs: 51 - Follows: 67 - Updated: 2/7 - Published: 12/29/2023
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: 6 - Words: 24,140 - Reviews: 65 - Favs: 243 - Follows: 303 - Updated: 2/6 - Published: 6/24/2019 - T. Lasky, S. Carter
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: 55 - Words: 228,433 - Reviews: 1985 - Favs: 1,825 - Follows: 2,176 - Updated: 2/5 - Published: 11/17/2020 - Kurt-051, Lucy-B091, Tom-B292, Tywin L.
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: 11 - Words: 74,680 - Reviews: 71 - Favs: 102 - Follows: 141 - Updated: 2/5 - Published: 12/26/2023 - OC, W. Adama, L. Adama/Apollo, K. Thrace/Starbuck
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: 23 - Words: 123,604 - Reviews: 568 - Favs: 1,130 - Follows: 1,599 - Updated: 2/4 - Published: 11/23/2023 - Cortana, Shepard
The lost sword by Lighting wolf knight
The war with the empire brings in new players... And a new angle. Rated T for violence, death, and profanity.
Crossover - Star Wars & Halo - Rated: T - English - Adventure/Romance - Chapters: 1 - Words: 804 - Favs: 3 - Follows: 4 - Published: 2/3 - Luke S., OC, Arbiter, Atriox
Halo of Remnant by Akyy-Wolf reviews
UNSC Spirit of Fire finds itself above a new planet alone, or maybe not, to fight a new war against a common threat. The Support vessel and its allies will have a hard battle as a common foe discovers them.
Crossover - Halo & RWBY - Rated: M - English - Adventure - Chapters: 3 - Words: 19,426 - Reviews: 12 - Favs: 19 - Follows: 26 - Updated: 2/3 - Published: 1/21 - J. Cutter, OC, Team RWBY
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: 17 - Words: 59,187 - Reviews: 140 - Favs: 496 - Follows: 739 - Updated: 2/3 - Published: 7/8/2022 - Rookie, Shepard
The Ghost and The Eagle by Johnnieboy11 reviews
The Master Chief's life was filled with the harrows of war, loss of comrades, allies and friends. The Enterprise's service was wrought with much the same, with the losses sustained by the Eagle Union's Carriers during the early days of the Siren War being the most painful. Where these two would meet was a very familiar place to both:The Battlefield. And a bond will be forged.
Crossover - Halo & Azur Lane/碧蓝航线 - Rated: T - English - Romance/Sci-Fi - Chapters: 27 - Words: 91,481 - Reviews: 269 - Favs: 759 - Follows: 899 - Updated: 2/3 - Published: 10/18/2019 - Master Chief/John-117, Enterprise, Belfast, Prince of Wales
RWBY:Spartan Assault by Johnnieboy11 reviews
After John-117's battle on board Mantle's Approach, the Spartan finds himself, with Cortana in tow, sent to a different world, where monsters roam the wilds, Humanity is confined to 4 major Kingdoms and where Magic and Tech coexist. The Spartan will soon have to join the ranks of the good guys against a horrid threat, whilst also on the lookout for fellow Spartans.
Crossover - Halo & RWBY - Rated: T - English - Adventure/Sci-Fi - Chapters: 32 - Words: 141,474 - Reviews: 214 - Favs: 602 - Follows: 735 - Updated: 2/2 - Published: 1/12/2021 - [Master Chief/John-117, Cortana] C. Halsey, Team RWBY
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: 20 - Words: 138,566 - Reviews: 153 - Favs: 416 - Follows: 535 - Updated: 2/2 - Published: 3/2/2022 - SPARTAN-B312/Noble Six, No. 12/Hibiki, No. 11/Hikari, No. 16/Toyotama
Operation: WASTELAND by Spartan-049
Whilst exploring the depths of Gamma Halo, a lone Spartan inexplicably finds himself transported to an irradiated wasteland on a planet that shouldn't have one; Earth. Hoping to find some answers he enlists the help of a local courier already on a quest of his own to find something.
Crossover - Fallout & Halo - Rated: T - English - Adventure/Western - Chapters: 1 - Words: 4,165 - Favs: 10 - Follows: 10 - Published: 2/2
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: 5 - Words: 7,639 - Reviews: 29 - Favs: 69 - Follows: 85 - Updated: 1/31 - Published: 7/24/2023 - SPARTAN-B312/Noble Six, Space Marines
Naruto: The Last Soldier by Bl00dyAbyss reviews
What if on Naruto's fifth birthday, civilians and shinobi took Naruto to the Forest of Death, and Naruto fell into a deep hole. In that hole, there was a Halo Warrior battleship, and the battleship's AI system not only healed Naruto but also made him a Super Warrior and took the Kyubi from him.
Crossover - Naruto & Halo - Rated: M - English - Fantasy/Romance - Chapters: 1 - Words: 987 - Reviews: 7 - Favs: 35 - Follows: 39 - Published: 1/30
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. (Undergoing Chapter-by-Chapter Rewrites. Chapters 1-9 rewritten. Chapter 10 rewrites ongoing.)
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi/Drama - Chapters: 33 - Words: 453,429 - Reviews: 857 - Favs: 1,010 - Follows: 1,178 - Updated: 1/30 - Published: 10/11/2022 - Luke S., Han S., Master Chief/John-117, T. Lasky
Mantle Of Responsibility by GeorgeQuartz reviews
10 Years after the Human-Covenant war and an Alliance between the Sangheili and Humanity keeps that Milky Way stable, soon though, a dead battlefield is discovered and the discovery encounter leads to UNSC military forces being deployed to the edge of the Andromeda Galaxy, also known as... The Outer Rim. Ongoing (21BBY & 2564 AD Story start year)
Crossover - Halo & Star Wars - Rated: T - English - Sci-Fi - Chapters: 27 - Words: 261,353 - Reviews: 398 - Favs: 906 - Follows: 1,039 - Updated: 1/30 - Published: 6/17/2020 - Ahsoka T., Fives, Rookie, 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: 2 - Words: 14,032 - Reviews: 19 - Favs: 48 - Follows: 59 - Updated: 1/29 - Published: 12/31/2023 - Daisy-023
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