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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: 8 - Words: 50,369 - Reviews: 120 - Favs: 358 - Follows: 494 - Updated: 2/3 - Published: 2/20/2024 - Master Chief/John-117, Cortana, 2B, 9S
The Call to War by silencewillfall0091 reviews
In 2550 CE, 25 years into our war with the Covenant, a Turian fleet exploded out of the ice moon orbiting Lusitania. The Hierarchy, aching for a war since the humiliation of the Rachni invasion, stumbled into the most brutal conflict in recent galactic history.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 2,164 - Reviews: 15 - Favs: 71 - Follows: 102 - Published: 2/2
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: 9 - Words: 33,815 - Reviews: 86 - Favs: 142 - Follows: 178 - Updated: 2/2 - Published: 11/23/2023 - Caesar, SPARTAN-B312/Noble Six
El Noble del Normandía Halo x Mass Effect by Aghriik reviews
Reach, el bastión de la humanidad, ha caído. Uno de los Spartans del equipo Noble se quedó atrás para proteger al Pillar of Autumn, El es conocido como el Fantasma Viviente, el Lobo Solitario, la Parca Personal de la ONI... o simplemente, Noble Seis. Ahora, lejos de su hogar y su tiempo, deberá levantarse una vez más. No solo por un planeta. No solo por una especie. Una galaxia.
Crossover - Halo & Mass Effect - Rated: T - Spanish - Sci-Fi/Romance - Chapters: 17 - Words: 154,999 - Reviews: 1 - Favs: 10 - Follows: 11 - Updated: 2/1 - Published: 1/6 - [SPARTAN-B312/Noble Six, Tali'Zorah] [Garrus V., 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: 18 - Words: 78,544 - Reviews: 266 - Favs: 699 - Follows: 944 - Updated: 2/1 - Published: 12/24/2020 - D. Jackson, J. O'Neill, Teal'c, Master Chief/John-117
Ananke by Onyx Gungnir reviews
Explorers from the four Council species activated a dormant relay at the edge of charted space, hoping to find new planets that someone could one day call home and answers to ancient questions. But what they found was not a new home but a shattered planet—and in its orbit, something that would change everything for them. Mass Effect x Halo x BSG crossover.
Crossover - Halo & Mass Effect - Rated: M - English - Chapters: 2 - Words: 11,113 - Reviews: 30 - Favs: 145 - Follows: 220 - Updated: 2/1 - Published: 12/1/2024
The Terminus Exarchate by infamouswestgate reviews
Qelet B'Norai, Batarian cartel-kin and agent of the Covenant, travels the swallowed-yet-undigested worlds of the Terminus Exarchate! Can he save the Covenant Empire from collapsing underneath its own great weight?
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 26 - Words: 78,123 - Reviews: 40 - Favs: 20 - Follows: 26 - Updated: 1/30 - Published: 9/11/2024
The Howling Dark by Seawolf321 reviews
For Earth Bet, December Seventh of 2010 was just another inexplicable event. For the six affected by it, it was Combat Evolved...
Crossover - Halo & Worm - Rated: M - English - Sci-Fi - Chapters: 3 - Words: 13,024 - Reviews: 5 - Favs: 13 - Follows: 20 - Updated: 1/30 - Published: 1/28 - Anton-044, Shadow Stalker
Thus I Scatter Rewrite by The crimson trucker reviews
An unexpected slip-space rupture sends Summer Rose to the streets of New Mombasa. Looking for a way home, She learns a secret hidden through time. Rwby and Halo are owned by their respective owners and creators. Please support the official release.
Crossover - Halo & RWBY - Rated: T - English - Sci-Fi/Adventure - Chapters: 8 - Words: 12,564 - Reviews: 18 - Favs: 78 - Follows: 130 - Updated: 1/30 - Published: 11/21/2023 - A. J. Johnson, Arbiter, Cortana, Summer R.
No Gods, Nor Masters by Johnnieboy11 reviews
After the pyrrhic victory of the Human-Covenant War, the Covenant was split into many warring factions vying for the power of old. The UNSC was left, bloodied, but as the sole power in the Milky Way for now. After an incredible discovery within a set of Forerunner Ruins, an Exploration Fleet with Doctor Halsey at its head is sent out. What they find will change everything.
Crossover - Halo & Gate - Jietai Kare no Chi nite, Kaku Tatakeri - Rated: T - English - Adventure/Sci-Fi - Chapters: 49 - Words: 221,986 - Reviews: 817 - Favs: 1,466 - Follows: 1,732 - Updated: 1/29 - Published: 1/28/2022 - C. Halsey, OC, Itami, Tyuule
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: 10 - Words: 37,764 - Reviews: 15 - Favs: 35 - Follows: 51 - Updated: 1/29 - Published: 8/25/2024
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: M - English - Sci-Fi - Chapters: 3 - Words: 17,029 - Reviews: 206 - Favs: 535 - Follows: 676 - Updated: 1/29 - Published: 1/3/2023 - OC
Ascendance by lovelytwilight5294 reviews
Jonesy's battle royale practice meets a dramatic turn as invaders take over the sky.
Crossover - Halo & Fortnite - Rated: T - English - Adventure - Chapters: 1 - Words: 349 - Reviews: 3 - Follows: 1 - Published: 1/28
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: 2 - Words: 4,557 - Reviews: 14 - Favs: 18 - Follows: 29 - Updated: 1/28 - Published: 12/16/2024 - Naruto U.
Halo Effect by kamilospl1312 reviews
What if UNSC replace System Allience from Mass Effect
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 5 - Words: 15,941 - Reviews: 62 - Favs: 98 - Follows: 161 - Updated: 1/26 - Published: 8/12/2024
Dust and Echoes by trestwho reviews
After a successful mission, a UNSC fleet makes a random slipspace jump only to come across an uncharted system containing a sliver of humanity, one with seemingly no connection to Earth and whose natural abilities defy reason. In a galaxy full of terrifying dangers, the UNSC and Remnant must work together to defend all they know from annihilation.
Crossover - Halo & RWBY - Rated: M - English - Sci-Fi/Adventure - Chapters: 33 - Words: 417,608 - Reviews: 1533 - Favs: 1,857 - Follows: 2,014 - Updated: 1/26 - Published: 1/12/2020 - Master Chief/John-117, Arbiter, Team RWBY, Team JNPR
Galactic Warbooks by DeafeningEcho reviews
Throughout countless galaxies, civilizations have warred in the stars, clashing with their warships over endless worlds. Each of these civilizations calls their ships something different, let’s find out what those are.
Crossover - Mass Effect & Halo - Rated: K - English - Sci-Fi - Chapters: 8 - Words: 15,499 - Reviews: 4 - Favs: 3 - Follows: 4 - Published: 1/24
Sunrise, Parabellum by Hereshey reviews
With the Vinetan Campaign squared-away and Man's homeworld tucked firmly under the Nation's shoestring belt, the Invasion of Kitezh now starts in earnest. The penultimate smackdown with the Empire's regent-lords is coming and out in the void beyond the Oort, a scouting ship cashes-in its ticket to safety as the Office of Naval Intelligence fires-up its latest Forerunner toy.
Crossover - Halo & SIGNALIS - Rated: M - English - Sci-Fi/Adventure - Chapters: 5 - Words: 24,275 - Reviews: 8 - Favs: 15 - Follows: 19 - Updated: 1/23 - Published: 11/2/2024
Terminator Defiance:A New Hope by Johnnieboy11 reviews
T-Force, those that'd broken off from the Founders during the early stages of the war, helped form the Resistance. A skirmish for an old AFB near Wichita turns sour for Lieutenant Church as he and his troops are forced to engage the Wireheads, only for the unexpected to drop into their lap:A new, friendly and highly-advanced human faction seeking to help rid the world of Legion.
Crossover - Terminator & Halo - Rated: T - English - Horror/Sci-Fi - Chapters: 3 - Words: 12,289 - Reviews: 33 - Favs: 76 - Follows: 89 - Updated: 1/23 - Published: 3/18/2024 - John Connor, The Terminator, OC
War of the Hearts by World Archivist reviews
The Human-Covenant war had left an undeniable scar on the galaxy. Now in the year 2553, a new enemy shall appear, and a new war shall begin, one with origins in a time before the Halo Array.
Crossover - Halo & Kingdom Hearts - Rated: M - English - Sci-Fi - Chapters: 7 - Words: 6,283 - Reviews: 3 - Favs: 8 - Follows: 10 - Updated: 1/20 - Published: 4/19/2024
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: 33 - Words: 145,612 - Reviews: 226 - Favs: 686 - Follows: 807 - Updated: 1/20 - Published: 1/12/2021 - [Master Chief/John-117, Cortana] C. Halsey, Team RWBY
Operation: WASTELAND by Spartan-049 reviews
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. Looking for a way to support himself, he teams up with a local courier investigating a series of mysterious disappearances from the city of New Vegas.
Crossover - Fallout & Halo - Rated: T - English - Adventure/Western - Chapters: 7 - Words: 24,635 - Reviews: 19 - Favs: 39 - Follows: 56 - Updated: 1/19 - Published: 2/2/2024
Halo: Fallen Stars (A Halo x Warcraft Crossover) by DarkNovaExtremia reviews
2537. The UNSC tries to find a new home for humanity to settle in, one away from the Covenant's reach. An old Punic-class supercarrier was chosen to do so, but a Covenant battle group pursues her relentlessly, until a black hole ends their chase. As both sides stumble in a new universe, the question remains: Will they bring their war to Azeroth? Or will they find a new beginning?
Crossover - Warcraft & Halo - Rated: T - English - Sci-Fi/Fantasy - Chapters: 4 - Words: 30,720 - Reviews: 14 - Favs: 51 - Follows: 76 - Updated: 1/18 - Published: 6/28/2024 - Arthas Menethil, Jaina Proudmoore, Tyrande Whisperwind, OC
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: 99 - Words: 568,253 - Reviews: 459 - Favs: 1,006 - Follows: 1,162 - Updated: 1/17 - Published: 9/30/2021 - [Harry P., Hermione G., Daphne G.] Master Chief/John-117
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: 6 - Words: 25,328 - Reviews: 24 - Favs: 127 - Follows: 161 - Updated: 1/16 - Published: 2/15/2024 - Master Chief/John-117, A. J. Johnson, SPARTAN-B312/Noble Six, OC
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