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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: 17 - Words: 125,941 - Reviews: 912 - Favs: 1,786 - Follows: 2,297 - Updated: 5/31 - Published: 7/28/2018 - Anakin Skywalker, Obi-Wan K., Master Chief/John-117, Cortana
Boku No Halo Academia: For Want of a Mustard Seed by Iowaman24 reviews
Eleven years have passed since the apocalyptic collapse at the end of the Third World War, and under Aurdel Ganowicz's oversight much of Japan has been rebuilt. However many are still unhappy with the way things are, and as a result the League of Villains has returned. But without an ideology, and under a seemingly revived former member, they are hellbent on destroying everything.
Crossover - Halo & My Hero Academia/僕のヒーローアカデミア - Rated: M - English - Sci-Fi/Drama - Chapters: 6 - Words: 30,438 - Reviews: 1 - Favs: 8 - Follows: 9 - Updated: 10/3 - Published: 7/29 - OC, Izuku M., 1-A Students
The Last Metroid by Two Dudes and a Dream reviews
Her Metroid DNA had taken over, resulting in a monstrous transformation. Unable to control her powers, when attempting to escape ZDR, her ship loses power due to her actions. She can't remember what happened after that, but now, all she sees is the blackness of space, left drifting, alone. In the distance, the broken body of a frigate is seen, with the name of Forward Unto Dawn…
Crossover - Metroid & Halo - Rated: M - English - Sci-Fi/Suspense - Chapters: 33 - Words: 150,248 - Reviews: 306 - Favs: 336 - Follows: 471 - Updated: 10/3 - Published: 9/20/2022 - Samus A., Adam, Master Chief/John-117, Cortana
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: 10 - Words: 35,880 - Reviews: 110 - Favs: 312 - Follows: 422 - Updated: 10/3 - Published: 11/29/2022 - Master Chief/John-117, Cortana, Commander, Rapi
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. Read next chapter Author Notes for important news.
Crossover - Warhammer & Halo - Rated: T - English - Adventure/Romance - Chapters: 24 - Words: 83,921 - Reviews: 75 - Favs: 136 - Follows: 171 - Updated: 10/3 - Published: 7/15 - Space Marines, OC, Arbiter, Linda-058
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: 5 - Words: 49,971 - Reviews: 42 - Favs: 114 - Follows: 139 - Updated: 10/3 - Published: 8/24 - Master Chief/John-117, Arbiter, 343 Guilty Spark, C. Halsey
Gensokyo: Combat Evolved by CrackPairingLover reviews
A collection of short stories that are all loosely connected to one another. Please leave reviews and share your thoughts to keep this story going.
Crossover - Halo & Touhou Project - Rated: M - English - Sci-Fi/Fantasy - Chapters: 8 - Words: 4,252 - Reviews: 9 - Favs: 1 - Follows: 2 - Updated: 10/2 - Published: 7/26 - Rtas 'Vadumee, Youmu K., Rookie, Reimu H.
Infinite Noble by Arkanehouse
"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: 1 - Words: 1,454 - Favs: 2 - Follows: 2 - Published: 9/16 - SPARTAN-B312/Noble Six
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: 23 - Words: 124,532 - Reviews: 137 - Favs: 282 - Follows: 424 - Updated: 9/4 - Published: 2/21/2022
Book 1: Wolves by Believer218 reviews
The Academy became the home of Spartan training after the loss of Laconia Station. Kept hidden for decades, it has the potential to tip the balance in favor of the UNSC. But secrets lurk beneath the facility, and they are about to be unleashed. Join the Lone Wolves as they embark on an adventure that could change more than one universe. The first adventure in the Lost Wolves Saga.
Crossover - Halo & Avatar: Last Airbender - Rated: T - English - Fantasy/Adventure - Chapters: 11 - Words: 61,667 - Reviews: 4 - Favs: 6 - Follows: 7 - Updated: 10/1 - Published: 6/27 - H. Dinh, OC, Aang, Katara
Many hands make light work by Polluxsashes reviews
A normal twenty-first century human mind stuck inside a Huragok, a Forerunner biobot, gets punted straight into the worst place anyone could ever be: Warhammer 40k. What is he to do but what he is made for? Beware all who call this horrid universe home, you will be 'halped'. First story on this site, updates every month. I have up to chapter 12 already written.
Crossover - Warhammer & Halo - Rated: M - English - Sci-Fi - Chapters: 11 - Words: 21,670 - Reviews: 88 - Favs: 281 - Follows: 401 - Updated: 10/1 - Published: 4/27
HaloGears of War:: Gears Into The Outer Frontier by Spec-Op Marine 117 reviews
The Locust War on Sera was supposed to end. for good but a discovery of a mysterious alien artifact in Azura teleported Marcus and the Gears off to another universe, the world of Reach, The Gears found themselves drawn into something more significant than ever, another one had just begun. New allies, the Spartans. A new enemy and a new war to fight. A New Fight.
Crossover - Halo & Gears of War - Rated: M - English - Adventure/Sci-Fi - Chapters: 3 - Words: 10,597 - Reviews: 18 - Favs: 20 - Follows: 26 - Updated: 10/1 - Published: 7/19 - SPARTAN-B312/Noble Six, Marcus F., Anya S.
Bellum Terranum by F35B reviews
In the year 2585 the Humans have mostly recovered from the effects of the Human-Covenant War, however unknown to them, there is a much larger Galaxy out there... one that doesn't take kindly to humanity and their... antics... However an old threat still lays out there, ready to strike. Pls Read & Review (Slight HFY)(AU)
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi - Chapters: 6 - Words: 29,252 - Reviews: 163 - Favs: 302 - Follows: 462 - Updated: 9/30 - Published: 7/31
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: 3 - Words: 15,458 - Reviews: 41 - Favs: 129 - Follows: 180 - Updated: 9/30 - Published: 2/6
The Great War by Forgotten Trooper reviews
9BBY The Galactic Empire is a Behemoth, with no Rebellion to speak of and a unstoppable military, it will soon find itself dragged into conflict with unforeseen enemies and unusual allies. The UNSC is losing the war to the Covenant, and the Prophets consolidate their power over their Dominion. These Gargantuan forces will collide in a war that will leave the galaxy forever changed.
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi - Chapters: 3 - Words: 11,641 - Reviews: 15 - Favs: 54 - Follows: 72 - Updated: 9/30 - Published: 8/13 - Darth Vader, Prophet of Truth, P. Cole
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: 78 - Words: 920,368 - Reviews: 214 - Favs: 441 - Follows: 474 - Updated: 9/29 - Published: 9/29/2020 - Sole Survivor, Arthur Maxson, Shaun, OC
Mobile Suit Gundam:The War of Reunion by Johnnieboy11 reviews
Asticassia School is gone. The DAWN OF FOLD, or someone else, destroyed it. Cast from their time and place, two young women and their Gundam now find themselves amidst the waning days of the greatest war this world's version of mankind has ever faced. Survival is not guaranteed, though there is hope, perhaps now, more than ever, for humanity.
Crossover - Halo & Mobile Suit Gundam: The Witch from Mercury - Rated: M - English - Suspense/Sci-Fi - Chapters: 2 - Words: 9,950 - Reviews: 17 - Favs: 80 - Follows: 89 - Updated: 9/29 - Published: 9/13 - [Suletta M., Miorine R.] Master Chief/John-117, Cortana
Green Machine by giblo126 reviews
When a Resistance base is attacked by a Combine army, a mysterious hero comes to save them
Crossover - Half-Life & Halo - Rated: T - English - Sci-Fi - Chapters: 1 - Words: 1,289 - Reviews: 1 - Favs: 3 - Follows: 5 - Published: 9/28
Semper Vigiles by Cypher1597 reviews
Headhunter. Spartan. Killer. Cyrus was many things, but killer is the most accurate term. Now he stands in a city full of killers all vying to be top dog. Let those fools climb over one another to reach the apex. It won't matter because soon it will all come crashing down. All of it, for we are but motes of dust and echoes. From dust we rise and to dust we go. Semper Vigiles.
Crossover - Halo & Cyberpunk 2077 - Rated: M - English - Adventure - Chapters: 2 - Words: 11,587 - Reviews: 45 - Favs: 194 - Follows: 235 - Updated: 9/27 - Published: 9/21
The Song of Infinity by Johnnieboy11 reviews
As the battle of Christophsis is ongoing, a new faction emerges over the crystalline battlefield. Confusion, worry and fear permeate the Republic lines until a first shot is fired in anger by the Confederacy. A change stirs in the Force, the Reclaimers are awakening and the Galaxy at large is powerless to stop them.
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 17 - Words: 68,020 - Reviews: 127 - Favs: 528 - Follows: 676 - Updated: 9/27 - Published: 3/23 - Anakin Skywalker, Ahsoka T., Master Chief/John-117, T. Lasky
Halo: Lost in Hogwarts by floodrisk07 reviews
LordCaldrin45's Master Chief and The Order Of The Phoenix continued. The wreckage of the Forward Unto Dawn went through a black hole, teleporting Master Chief and Cortana back to 1995 Earth and crash landing in England, where Harry Potter is taking his fifth year. A new adventure is about to begin. (COVER) Master Chief in a Ford Anglia
Crossover - Harry Potter & Halo - Rated: T - English - Sci-Fi/Fantasy - Chapters: 13 - Words: 25,894 - Reviews: 12 - Favs: 17 - Follows: 32 - Updated: 9/26 - Published: 9/14
Stargate Atlantis Fire Within by heavyneos reviews
Just as the Atlantis team think they have finally found a reprieve from the Wraith thanks to a fortuitous accident something hidden in deep space and from another world may bring more than one complication to the fight
Crossover - Halo & Stargate: Atlantis - Rated: T - English - Sci-Fi/Adventure - Chapters: 2 - Words: 11,875 - Reviews: 17 - Favs: 43 - Follows: 59 - Updated: 9/26 - Published: 9/8 - Rodney M., John S., OC
Horizon War:Tales of the UNSC-Citizen Federation War by Johnnieboy11 reviews
A chance encounter with Forerunner Technology leads the UNSC to discover a two-way portal which leads into a Universe so similar, yet ever so different from their own. First contact with said Universe's humanity, however, goes awfully wrong, sparking the greatest war since the Human-Covenant War. These are the tales of those who fought in it.
Crossover - Halo & Starship Troopers - Rated: M - English - Adventure/Sci-Fi - Chapters: 12 - Words: 44,890 - Reviews: 148 - Favs: 202 - Follows: 266 - Updated: 9/25 - Published: 6/13 - [J. Rico, Dizzy F.] C. Halsey, T. Lasky
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.
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi/Drama - Chapters: 30 - Words: 512,045 - Reviews: 773 - Favs: 894 - Follows: 1,055 - Updated: 9/25 - Published: 10/11/2022 - Luke S., Han S., Master Chief/John-117, T. Lasky
Code Lyoko: War logs 1 by superman42 reviews
Stories (in chapter order) Prologue (Prelude to Crisis core) Dark Harvest storyline (start of crisis core) Heart of Ice (needed to understand prologue future crisis) Breakdown (Scrapped concept involving dino hybrids) in order: Prologue the remaining five chapters after that start Dark Harvest HOI precedes Dark Harvest (CC pt 1) which leads to Breakdown WL2 finishes CC
Crossover - Code Lyoko & Halo - Rated: M - English - Tragedy/Drama - Chapters: 14 - Words: 15,532 - Reviews: 8 - Favs: 3 - Follows: 2 - Updated: 9/25 - Published: 3/1/2022 - Aelita S., Jeremie B., Yumi I., OC - Complete
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