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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: 32 - Words: 110,447 - Reviews: 78 - Favs: 163 - Follows: 203 - Updated: 13h - Published: 7/15 - Space Marines, OC, Arbiter, Linda-058
Relic of the Past by A Salty Archer reviews
"To dream is to be willing to sacrifice. To prevent those sacrifices from becoming too high is to fight. But you cannot fight and win by yourself. So I ask you: how much are you willing to sacrifice to make those dreams a reality?"
Crossover - Halo & Arknights - Rated: M - English - Chapters: 2 - Words: 15,771 - Reviews: 17 - Favs: 47 - Follows: 80 - Updated: 11/11 - Published: 11/9 - Master Chief/John-117, Doctor
The Man, The Myth, The Legend by Grocamol reviews
A simple one shot fic I had made some time ago, time to share it. Enjoy!
Crossover - Halo & Mass Effect - Rated: M - English - Chapters: 1 - Words: 6,995 - Reviews: 3 - Favs: 10 - Follows: 7 - Published: 11/11 - A. J. Johnson - Complete
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: 14 - Words: 50,810 - Reviews: 173 - Favs: 366 - Follows: 492 - Updated: 11/10 - Published: 11/29/2022 - Master Chief/John-117, Cortana, Commander, Rapi
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: 5 - Words: 31,603 - Reviews: 86 - Favs: 330 - Follows: 389 - Updated: 11/10 - Published: 9/21
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: 19 - Words: 142,351 - Reviews: 973 - Favs: 1,854 - Follows: 2,381 - Updated: 11/9 - Published: 7/28/2018 - Anakin Skywalker, Obi-Wan K., Master Chief/John-117, Cortana
New Era II by martinantab reviews
The war has ended and UNSC/UEG can finally start with rebuilding. Former Covenant races created new alliance to prevent another big war. Everybody thought that they can live peacefully, but few years later UNSC Gargantua has discovered mysterious object in the Orion's arm and no one is sure, if everything will be the same again.
Crossover - Halo & Mass Effect - Rated: M - English - Adventure/Humor - Chapters: 3 - Words: 20,549 - Reviews: 14 - Favs: 83 - Follows: 117 - Updated: 11/9 - Published: 10/28 - Master Chief/John-117, T. Lasky, Councilor Tevos, Councilor Valern
Silent Sojourn by Chris000 reviews
On the far edges of the Aurora system, a strange signal has been detected. Intrigued and concerned that it may be the sign of something that had escaped notice, the UNSC has sent the corvette Dawnrunner to investigate. Now far from the sun's light and in the embrace of the deep void, the crew is on their own to deal with what they find without ready backup.
Crossover - Sonic the Hedgehog & Halo - Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 9,282 - Reviews: 1 - Favs: 4 - Follows: 2 - Published: 11/9 - Sally, Max A., OC - Complete
All the Stars by BlueWay reviews
When the Long Night of Solace is evaporated over Reach via the weaponized usage of a Slipspace Drive, it ferries with it in its swallowed sections the Covenant Empire and, more horrifyingly, the desperate measures that the UNSC used to fight them. When they are found in a universe on the precipice of their own history, the meaning of the term "Mass Effect" will change forever.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 46 - Words: 802,177 - Reviews: 1317 - Favs: 1,856 - Follows: 2,210 - Updated: 11/9 - Published: 6/8/2018 - SPARTAN-B312/Noble Six, Rookie, Shepard
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: 6 - Words: 57,204 - Reviews: 45 - Favs: 130 - Follows: 155 - Updated: 11/9 - Published: 8/24 - Master Chief/John-117, Arbiter, 343 Guilty Spark, C. Halsey
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: 25 - Words: 136,914 - Reviews: 148 - Favs: 301 - Follows: 449 - Updated: 11/8 - Published: 2/21/2022
Digimon War Game S2 by riven-del reviews
The Halo has been destroyed, but the Covenant have a new objective: Earth. Cassandra will have her work cut out for her as she helps the Pillar of Autumn's crew stall the enemy and more Tamers with crests show up.
Crossover - Digimon & Halo - Rated: T - English - Adventure/Sci-Fi - Chapters: 11 - Words: 13,406 - Reviews: 5 - Favs: 9 - Follows: 8 - Updated: 11/8 - Published: 9/2/2022 - OC, Herissmon, Master Chief/John-117, Fred-104
Halo Galactic Wars: RE-IMAGINED by Crimson Soldat reviews
During the Battles of Zeta Halo, the Master Chief happens across a new site drastically different from the installation it resides on. Without any warning, he is violently sucked into a new war in a Galaxy Far, Far, Away. The following event will shake both universes and their respective peoples. And new secrets, thought lost to time, will be uncovered. co-written by F35B.
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 14,010 - Reviews: 20 - Favs: 110 - Follows: 154 - Updated: 11/8 - Published: 7/14 - Anakin Skywalker, Obi-Wan K., Ahsoka T., Master Chief/John-117
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: 14 - Words: 84,973 - Reviews: 4 - Favs: 9 - Follows: 10 - Updated: 11/6 - Published: 6/27 - H. Dinh, OC, Aang, Katara
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: 20 - Words: 121,141 - Reviews: 434 - Favs: 1,236 - Follows: 1,634 - Updated: 11/5 - Published: 11/25/2020 - OC, Master Chief/John-117, Cortana
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: 4 - Words: 18,922 - Reviews: 63 - Favs: 175 - Follows: 247 - Updated: 11/5 - Published: 2/6
Halo: From Spartan to Seran by CommanderAuri reviews
What was originally set to be a smash and grab mission goes completely sideways. A haphazard escape through teleporter on the shield world Requiem's surface sends Spartan Commander Rachel Auri flying head over heels onto foreign soil with hostile contacts right on her tail. Follow her story as she tries to survive a planet that is constantly attempting to kill off it inhabitants.
Crossover - Halo & Gears of War - Rated: K - English - Sci-Fi/Adventure - Chapters: 7 - Words: 56,578 - Reviews: 21 - Favs: 36 - Follows: 48 - Updated: 11/2 - Published: 11/9/2022 - Marcus F., Dominic S., A. Cole, D. Baird
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: 12 - Words: 41,629 - Reviews: 98 - Favs: 411 - Follows: 618 - Updated: 11/1 - Published: 7/8/2022 - Rookie, Shepard
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: 12 - Words: 24,920 - Reviews: 110 - Favs: 375 - Follows: 509 - Updated: 11/1 - Published: 4/27
Halo: Doctor Who by TimeTraveller-1900
A series of one-shots chronicling the life of Doctor Who, a Time Lord from the planet Gallifrey, who is forced to flee his world after years of travelling the stars and trying and failing to make a better world, before becoming stranded during the Human-Covenant war.
Crossover - Doctor Who & Halo - Rated: M - English - Adventure/Sci-Fi - Chapters: 4 - Words: 4,352 - Favs: 6 - Follows: 9 - Updated: 10/31 - Published: 10/25 - 1st Doctor, 2nd Doctor, Martha J., C. Halsey
The First Men in Space by TimeTraveller-1900
A series of one-shots set in the 1964 movie, The First Men in the Moon, spanning decades as humanity moves out into the universe, fighting off Martians, and alien invaders, and encountering foes in other solar systems before discovering the Covenant.
Crossover - Misc. Movies & Halo - Rated: M - English - Horror/Sci-Fi - Chapters: 5 - Words: 7,191 - Favs: 3 - Follows: 7 - Updated: 10/31 - Published: 10/24
The Sins of our Fathers by MarkerMagnum reviews
Unknown to the Citadel Council, the Human-Covenant war nears its vicious end. Miranda Keyes is seconds too slow. Delta Halo fires, leaving UNSC space as a lifeless snapshot in time. The Citadel must morn the loss of a civilization they never knew.
Crossover - Halo & Mass Effect - Rated: T - English - Drama/Sci-Fi - Chapters: 10 - Words: 97,151 - Reviews: 435 - Favs: 1,224 - Follows: 1,669 - Updated: 10/30 - Published: 2/11 - Cortana, Councilor Valern, Councilor Tevos, Councilor Sparatus
Buzzard Buccaneer Radio by General Rage reviews
Boz the Buzzard hosts this pirate radio station, beaming out music to the Normandy, Fallen Serpent, Crusty Chorka and Ascendant Justice non-stop. BBR has only one mission, to keep Rock n Roll alive in the dark void of outer space. A companion story to "Remnants" that shows what happens while Shepard is off playing hero. Part of the Wormhole Chronicles Saga.
Crossover - Halo & Mass Effect - Rated: M - English - Humor/Sci-Fi - Chapters: 11 - Words: 84,796 - Reviews: 98 - Favs: 97 - Follows: 111 - Updated: 10/29 - Published: 9/21/2016 - OC
Project Atlas by Masso 2010 reviews
The Spartans are trained to be unthinking, unflinching and unmoving in the face of the impossible. Project Atlas is so much more, when humanity looks up into the sky they can see Hope, Justice, Reverence. When those that seek to hurt humanity look up into the sky, they see the warrior, the monster, the demon. To those who seek the destruction of humanity, he is the Cataclysm.
Crossover - Superman & Halo - Rated: M - English - Adventure/Sci-Fi - Chapters: 22 - Words: 164,862 - Reviews: 201 - Favs: 442 - Follows: 517 - Updated: 10/29 - Published: 4/17/2022 - Clark K./Kal-El/Superman, Master Chief/John-117
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: 15 - Words: 55,690 - Reviews: 167 - Favs: 225 - Follows: 298 - Updated: 10/29 - Published: 6/13 - [J. Rico, Dizzy F.] C. Halsey, T. Lasky
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