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Halo 5 Guardians Of Sera by jason429 reviews
Inspired by Spartan Gears written by blacksuitchris. Taking place post Halo 5 and during Gears Of War 3. Taking place after the events of Halo 5 Guardians The UNSC Infinity send Fireteam Osiris and Blue Team to investigate a UNSC ship that crashed onto an unknown planet. But what was supposed to be a simple Search and Recover turns into a fight for survival in a new world.
Crossover - Halo & Gears of War - Rated: M - English - Adventure/Humor - Chapters: 47 - Words: 48,084 - Reviews: 35 - Favs: 81 - Follows: 74 - Updated: 4h - Published: 1/15/2016 - Master Chief/John-117, J. Locke, Marcus F., Dominic S.
Losing is Fun by Fabulous Wizard reviews
A typical self insert story where our hero gets to rule over his own civilization, complete with custom OC race. Everything should have been great. Only problem is that he's in the Warhammer 40k, bordering a major Ork empire, has a population of only 200,000, and his starting location is in North Korea.
Crossover - Warhammer & Halo - Rated: T - English - Chapters: 3 - Words: 15,692 - Reviews: 16 - Favs: 47 - Follows: 62 - Updated: 5h - Published: 3/28
The Son of the wolf by Lighting wolf knight
After the failed Hersey, the gods exile the broken Sons of Horus to another land... One where they may find redemption and a home. Rated T for violence, death, and profanity. Non chaotic/remorseful Horus.
Crossover - Warhammer & Halo - Rated: T - English - Chapters: 1 - Words: 814 - Favs: 3 - Follows: 5 - Published: 13h
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: 27 - Words: 94,786 - Reviews: 76 - Favs: 139 - Follows: 177 - Updated: 13h - Published: 7/15 - Space Marines, OC, Arbiter, Linda-058
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: 13 - Words: 48,390 - Reviews: 157 - Favs: 205 - Follows: 271 - Updated: 21h - Published: 6/13 - [J. Rico, Dizzy F.] C. Halsey, T. Lasky
Sangheili and Large Cats by Imperius980 reviews
"Mhm..." The Oracle hummed gently, floating around him lazily for a moment before bouncing and humming more purposefully. "First, a query, if you do not mind." "Never." He vowed, "My time is yours so long as you value it so." "You serve the Forerunners in all things." It said, "This is true?" written by me and edited by twisted fate and Fang Wolfsbane
Crossover - Halo & Kipo and the Age of Wonderbeasts - Rated: T - English - Adventure/Sci-Fi - Chapters: 16 - Words: 35,243 - Reviews: 12 - Favs: 27 - Follows: 32 - Updated: 10/14 - Published: 11/8/2020 - Rtas 'Vadumee, Kipo
Mass Effect: Forward Unto Dawn by WildcatWarrior67 reviews
Spartans never die. They're just missing in action. At least, that's how the saying goes. But for the Master Chief and Cortana, they're no longer missing. Awaking in a different universe, the two of them will uphold their oath: to protect Earth and all her colonies. Only it won't be from the Covenant this time.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 4 - Words: 7,562 - Reviews: 27 - Favs: 125 - Follows: 220 - Updated: 10/14 - Published: 11/26/2022 - Master Chief/John-117, Cortana, Shepard
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: 34 - Words: 155,355 - Reviews: 312 - Favs: 345 - Follows: 478 - Updated: 10/14 - Published: 9/20/2022 - Samus A., Adam, Master Chief/John-117, Cortana
The Exiles:A New Power by Johnnieboy11 reviews
The beginning of the Battle For Earth signaled the start of the final, bloodiest campaign of the Human-Covenant War. Hastily, a plan is put into motion and an Ark Fleet, composed of a dozen Phoenix-class vessels and their escorts, makes the jump out of system. Either interference, or malfunction, causes their arrival to a new Galaxy, where new threats lurk just around the corner.
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 13 - Words: 50,345 - Reviews: 228 - Favs: 738 - Follows: 1,113 - Updated: 10/14 - Published: 12/26/2021 - OC, Tali'Zorah, Admiral Hackett, Rael'Zorah
Rising of the Shield Helljumper by Autistic-Grizzly reviews
After the sacred duel between the spear and shield heroes, an army of a different world appear, one that supports the Shield Hero, now with the might of the UNSC behind him ODST Lance Corporal Naofumi Iwatani will be better equipped to handle the waves and find out the secrets linked between this world and the forerunners [RIP Billy]
Crossover - Halo & Rising of the Shield Hero/盾の勇者の成り上がり - Rated: M - English - Sci-Fi/Adventure - Chapters: 21 - Words: 54,313 - Reviews: 183 - Favs: 247 - Follows: 295 - Updated: 10/13 - Published: 1/2/2022 - Master Chief/John-117, E. Buck, Naofumi I., Raphtalia - Complete
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: 3 - Words: 17,320 - Reviews: 56 - Favs: 251 - Follows: 299 - Updated: 10/13 - Published: 9/21
The Terran Calamity by F35B reviews
(Formerly United Freedom) The Republic finds a small planet on the edge of their space but little do they know the repercussions of their actions. The Terran Eagle will not accept any compromises, nor will any of her citizens. (Halo Inspired Universe) (Star Wars Canon Universe)
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi - Chapters: 8 - Words: 81,340 - Reviews: 148 - Favs: 404 - Follows: 517 - Updated: 10/11 - Published: 1/3 - OC
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: 12 - Words: 69,374 - Reviews: 4 - Favs: 8 - Follows: 9 - Updated: 10/10 - Published: 6/27 - H. Dinh, OC, Aang, Katara
New era by martinantab reviews
Human-Covenant war ends and and UEG started with rebuilding. Former covenant races, after Elite-Brute Coalition sucess, entered the coalition and few years later humans too and new aliance was born. They thought, they will live in peace with no wars and/or limited conflicts, this was destroyed after discovery of suspect object not far away from Tassili, new harvest colony
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Humor - Chapters: 2 - Words: 4,015 - Reviews: 8 - Favs: 35 - Follows: 49 - Updated: 10/10 - Published: 10/6 - T. Hood, Master Chief/John-117, Councilor Sparatus, Councilor Tevos
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: 1 - Words: 7,524 - Reviews: 14 - Favs: 64 - Follows: 84 - Published: 10/9 - P. Cole, OC, Admiral Hackett, Shepard
The restoration of the UNSC by Warwolff2003 reviews
Reach has Fallen and the newly promoted Captain Jacob Keyes has taken his small fleet and st course for Earth. However, this is not the Earth those in the UNSC remember. This is my version of a similar story by originally by Samsara Sage which was adopted by Ultimate Deathsaurer 2
Crossover - Stargate: SG-1 & Halo - Rated: T - English - Sci-Fi - Chapters: 13 - Words: 57,344 - Reviews: 111 - Favs: 221 - Follows: 319 - Updated: 10/9 - Published: 12/22/2022 - S. Carter, J. O'Neill, Master Chief/John-117, J. Keyes
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: 11 - Words: 39,380 - Reviews: 129 - Favs: 324 - Follows: 438 - Updated: 10/7 - Published: 11/29/2022 - Master Chief/John-117, Cortana, Commander, Rapi
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: 3 - Words: 14,209 - Reviews: 22 - Favs: 58 - Follows: 75 - Updated: 10/7 - Published: 9/8 - Rodney M., John S., OC
The mark of the federation of independent species by migos501 reviews
(TESTING PHASE)“A single event can shape our lives or change the course of history.” United under a single banner, the federation stands as a testament that any species can thrive in harmony, gifted with technology that can tip the scale of an entire galaxy, they now face with a entirely new government and it’s sets of challenges(focusing on the mass effect story)
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi - Chapters: 1 - Words: 5,676 - Reviews: 10 - Favs: 23 - Follows: 36 - Published: 10/6 - Master Chief/John-117, Shepard
The Guiding Fire by UNSC indomitable reviews
A Commander striped of authority. The world divide and falling. Last fading light. Hope lays in Spirit and might. As those with the fire lay dying. All must stand fast in the face howling night.
Crossover - Halo & Azur Lane/碧蓝航线 - Rated: T - English - Sci-Fi/Adventure - Chapters: 14 - Words: 102,979 - Reviews: 95 - Favs: 212 - Follows: 289 - Updated: 10/6 - Published: 7/22/2020 - J. Cutter, Belfast, OC
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: 16 - Words: 126,286 - Reviews: 114 - Favs: 364 - Follows: 461 - Updated: 10/6 - Published: 3/2/2022 - SPARTAN-B312/Noble Six, No. 12/Hibiki, No. 11/Hikari, No. 16/Toyotama
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 & 2 rewritten. Chapter 3 rewrites ongoing.)
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi/Drama - Chapters: 31 - Words: 508,723 - Reviews: 788 - Favs: 911 - Follows: 1,067 - Updated: 10/6 - Published: 10/11/2022 - Luke S., Han S., Master Chief/John-117, T. Lasky
The Reclaimer of Mandalore by UNSC indomitable reviews
Having been awoken by his faithful companion. The Master Chief and Cortana find themselves in an unknown galaxy. Knowing the only way to survive is to remain under the radar. But in a galaxy gripped by war, such a thing was never going to be easy. As the Chief try's to up hold the status quo in the ever changing world of Mandalore, as the galaxy slowly torn apart around them.
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi - Chapters: 19 - Words: 114,554 - Reviews: 418 - Favs: 1,198 - Follows: 1,586 - Updated: 10/6 - Published: 11/25/2020 - OC, Master Chief/John-117, Cortana
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: 11 - Words: 43,836 - Reviews: 67 - Favs: 354 - Follows: 504 - Updated: 10/6 - Published: 7/7/2016 - SPARTAN-B312/Noble Six
Halo Gundam by 6-4 pilot reviews
Stuck in the Universal Century during the One Year War, Master Chief and his companions help the White Base Crew survive while also trying to find a way back to Zeta Halo. In the meantime, a group of battle-hardened Banished troops does what their organization does best. Take advantage of conflicts and various organizations for their own benefit. (Also includes Owl House)
Crossover - Halo & Gundam UC - Rated: M - English - Sci-Fi - Chapters: 32 - Words: 118,565 - Reviews: 203 - Favs: 115 - Follows: 136 - Updated: 10/5 - Published: 6/22/2022 - Master Chief/John-117, Amuro R.
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