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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: 8 - Words: 38,961 - Reviews: 111 - Favs: 117 - Follows: 172 - Updated: 1h - Published: 4/4/2024 - [Master Chief/John-117, Ashley W.] Arbiter, Saren A.
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
Massive Reckoning: Interstellar Assualt by vmoneywashere reviews
In the 2700s, the Milky Way is flourishing. Access to Forerunner ruins has allowed the races of the galaxy to explore their home and new galaxies. Now, a new fleet, lead by an Ancient Punic Class Fleet Carrier, is moving to explore a new galaxy. Soon enough, the UNSC will find itself embroiled in a new Great War, with a few standing in the way of mass extinction. (slow updates)
Crossover - Halo & Mass Effect - Rated: K+ - English - Sci-Fi - Chapters: 4 - Words: 31,484 - Reviews: 46 - Favs: 271 - Follows: 380 - Updated: 6/18/2024 - Published: 10/9/2023 - P. Cole, OC, Admiral Hackett, Shepard
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: 35 - Words: 48,105 - Reviews: 133 - Favs: 102 - Follows: 157 - Updated: 2/11 - Published: 10/18/2024 - OC, W. Adama, S. Tigh, Gaeta - Complete
Libera Terra by Johnnieboy11 reviews
Since the Black Mesa Incident and Seven Hour War, the Combine became the undisputed masters of Earth and the remnants of Humanity lived in fear within dystopian cityscapes. The few who live beyond the borders of the decaying cities are the Resistance, a small, almost harmless group to the War Machine of the Combine. That is all set to change, as new variables come to assist mankind
Crossover - Half-Life & Halo - Rated: T - English - Sci-Fi/Horror - Chapters: 8 - Words: 31,115 - Reviews: 32 - Favs: 103 - Follows: 130 - Updated: 2/18 - Published: 1/30/2023 - G-Man, Gordon F., Master Chief/John-117, Cortana
Louise Summons a Halo by CIA 4UUUU reviews
As posted on RainEStar3's Spacebattle's forum, Louise Summons (Series). What would happen if Louise summoned a Halo? Let's find out.
Crossover - Halo & Familiar of Zero - Rated: T - English - Fantasy/Sci-Fi - Chapters: 1 - Words: 5,173 - Reviews: 1 - Favs: 3 - Follows: 8 - Published: 2/17
Mjolnir Overlord by RamPluto reviews
The Master Chief arrives on Fevrith finding himself plunged into the midst of a conflict bathed in fantasy. Elves, witches, wyverns, and wizards, every fairy tale element is present in this new alien world. With no escape or contact back home in sight, will the Chief find a way back? Or will his journey to liberate a kingdom be the ultimate key he needs to find his humanity?
Crossover - Halo & Unicorn Overlord - Rated: T - English - Fantasy/Sci-Fi - Chapters: 6 - Words: 24,479 - Reviews: 37 - Favs: 79 - Follows: 102 - Updated: 2/17 - Published: 9/8/2024 - Master Chief/John-117, Rosalinde, Eltolinde, Alain
Infinite Noble by Arkanehouse reviews
"Conoces esta cosa...la vieja paradoja de remplazo, se pregunta si cuando a un objeto se le reemplazan todas sus partes, si este sigue siendo el mismo. Ya no eres el mismo, pero ellos creen que esa versión tuya es el verdadero tu. ¿Pero por qué? ¿Solo porque apareció primero?. Si no, tendrás que inventar tu propio "yo". O no ser nadie en absoluto. Ese es tu problema."
Crossover - Halo & Infinite Stratos/IS<インフィニット・ストラトス> - Rated: M - Spanish - Sci-Fi/Adventure - Chapters: 6 - Words: 17,637 - Reviews: 1 - Favs: 11 - Follows: 17 - Updated: 2/16 - Published: 9/16/2023 - SPARTAN-B312/Noble Six
Audax Novus by A-01 reviews
A bold new world - A strange new reality - Fresh trials, tribulations, allies, and enemies. John fell through the portal from the Mantles Approach, but his luck works in mysterious ways. Now stranded in an alternate reality, how will he strive forward? The galaxy takes a sharp turn from the world we know, and the Reaper threat looms just as large, but no longer so uncontested.
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Romance - Chapters: 26 - Words: 656,439 - Reviews: 831 - Favs: 1,914 - Follows: 2,343 - Updated: 3/2/2024 - Published: 9/4/2020 - [Master Chief/John-117, Miranda L.] [Shepard, Tali'Zorah]
Monster girl quest: LASO Lose and restart reviews
What happens when the world of MGQ is invaded by the mysterious power of skulls from Halo? Follow a Noble Six and Luka as they trudge through the plot and suffer from the hi-jinx of LASO and uncover new skulls that bring fun and misery.
Crossover - Halo & Monster Girl Quest - Rated: M - English - Humor/Adventure - Chapters: 1 - Words: 4,749 - Reviews: 1 - Favs: 1 - Follows: 1 - Published: 2/16 - SPARTAN-B312/Noble Six, Alice/Alipheese F. XVI, Ilias, Luka
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: 37 - Words: 132,303 - Reviews: 215 - Favs: 693 - Follows: 977 - Updated: 1/22 - Published: 7/8/2022 - Rookie, Shepard
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: 74 - Words: 164,694 - Reviews: 302 - Favs: 468 - Follows: 531 - Updated: 2/15 - Published: 1/10/2022 - C. Halsey, Naruto U.
Star Wars: Attack on Halo by mpewarren2 reviews
After meeting with the son and Anakin instead of the daughter and Ahsoka in the world between worlds, Ezra Bridger sets off a chain of events that unites three franchises in a battle for survival against multiple threats. Eren Yeager gains total control of the founding after Ymir returns to her time to let her husband die and be with her children after witnessing Mikasa kill him
Crossover - Halo & Star Wars: The Clone Wars - Rated: M - English - Adventure/Sci-Fi - Chapters: 3 - Words: 15,962 - Reviews: 1 - Favs: 2 - Follows: 4 - Updated: 2/15 - Published: 2/9 - Master Chief/John-117, Ahsoka T., Anakin S., R2-D2
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: 17 - Words: 99,268 - Reviews: 417 - Favs: 607 - Follows: 856 - Updated: 2/15 - Published: 2/6/2023
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: 8 - Words: 71,265 - Reviews: 83 - Favs: 191 - Follows: 261 - Updated: 2/15 - Published: 10/23/2024 - Master Chief/John-117, Didact, D. Anderson, Shepard
A Better Tomorrow by DLTA-BOT reviews
How can one man change a world ravaged by corruption, war, and poverty? And if that world isn't his own, why would he want to? In a life built out of discontent and fear, maybe the opportunity for change lies in a new place and a fresh start. A new beginning. And, maybe, he can look forward to a better tomorrow. - A companion story to Wrong Place, Right Time: A Hero's Story.
Crossover - Halo & Cyberpunk 2077 - Rated: T - English - Sci-Fi/Adventure - Chapters: 8 - Words: 76,315 - Reviews: 34 - Favs: 224 - Follows: 261 - Updated: 1/17 - Published: 4/16/2024 - OC, V, Johnny Silverhand, Rogue A.
Roses and Violets by Gashadokur0 reviews
Ever heard of a giant Megacorp falling down from the sky? Neither did Night City. Until a suriving group of UNSC came down with a mishmash of a UNSC Carrier ship. That certainly gave Night City something to talk about for months. (Inspired by both the main Halo series and Red vs Blue)
Crossover - Halo & Cyberpunk 2077 - Rated: T - English - Humor/Sci-Fi - Chapters: 34 - Words: 174,030 - Reviews: 154 - Favs: 296 - Follows: 365 - Updated: 2/14 - Published: 1/26/2024
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: 100 - Words: 1,165,825 - Reviews: 290 - Favs: 609 - Follows: 660 - Updated: 1/17 - Published: 9/29/2020 - Sole Survivor, Arthur Maxson, Shaun, OC
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: 56 - Words: 216,988 - Reviews: 111 - Favs: 316 - Follows: 365 - Updated: 2/14 - Published: 7/15/2023 - Space Marines, OC, Arbiter, Linda-058
From Domination to Genocide V2 by InnocentBlaze686 reviews
4000 years before Darth Vader, there was Mandalore the Preserver, who mysteriously disappeared from the galaxy. With the death of Chancellor Palpatine during his attempted kidnapping, the Republic seeks a new advantage over the CIS, which comes in the form of the newly found Mandalore. But something draws the Jedi away from the Republic: the screams of those suffering genocide.
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 16 - Words: 67,148 - Reviews: 386 - Favs: 493 - Follows: 643 - Updated: 2/14 - Published: 1/23/2016
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: 1 - Words: 9,651 - Reviews: 2 - Favs: 12 - Follows: 23 - Published: 2/9 - Griffin Commander, M4 SOPMOD II, RO635, OC
Louise Summons a Noble Spartan by CIA 4UUUU reviews
As posted on RainEStar3's Space Battles forum, Louise Summons Series. What would happen if Louise summoned Noble 6? Let's find out.
Crossover - Halo & Familiar of Zero - Rated: M - English - Sci-Fi/Fantasy - Chapters: 2 - Words: 10,504 - Reviews: 8 - Favs: 21 - Follows: 42 - Updated: 2/9 - Published: 1/28
HELLDIVERS:The Chance Encounter by Johnnieboy11 reviews
Super Earth is at war! In the Galactic West, the Automatons unleash their socialist horror upon the peoples of Super Earth. In the East, meanwhile, Terminids escaped from their cages bring forth destruction on our Colonies! Though, even amidst these trying times, hope remains! Newfound allies have entered the fight for Managed Democracy! Their name? The United Nations Space Command
Crossover - Helldivers & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 12 - Words: 48,415 - Reviews: 142 - Favs: 347 - Follows: 424 - Updated: 2/9 - Published: 3/2/2024 - Master Chief/John-117, A. J. Johnson, Arbiter, SPARTAN-B312/Noble Six
A Lady Waltz Through The Stars by Legotrix reviews
We shine brightly and intensely as shining stars destined for our fate to fade, We now know that deities and saints have lost their struggle, and both recognize their faults. Atonements awaited both. but they had more of a past linked to their quarrel, a record. being x lost, Tanya simply did not win, they both shared a distant past that their soul had forgotten, (Cap Tanya story)
Crossover - Halo & Youjo Senki: Saga of Tanya the Evil - Rated: T - English - Sci-Fi/Tragedy - Chapters: 23 - Words: 62,668 - Reviews: 1 - Favs: 10 - Follows: 10 - Published: 2/9 - J. Keyes, C. Halsey, Tanya, Viktoriya
The New Hope:The Phoenix Rises by Johnnieboy11 reviews
It is the Dark Age of Axis Victory and the world is rapidly crumpling. In the West, the Organization of Free Nations maintains the last democracies in the world through force of arms, while East of the Atlantic, the Axis's reign of terror over Europe and Asia continues. One unknown contact, however, is set to tip the balance of power forever.
Crossover - Halo & Hearts of Iron - Rated: M - English - Romance/Sci-Fi - Chapters: 5 - Words: 24,460 - Reviews: 24 - Favs: 88 - Follows: 119 - Updated: 11/7/2024 - Published: 9/10/2024 - J. Cutter, E. Anders, Douglas-042, OC
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