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RWBY:Spartan Assault by Johnnieboy11
Fandoms: Halo (Video Games) & Related Fandoms, RWBY
01 Dec 2025
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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.
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HALO 4: BLUE TEAM REFORGED by AlphaSpartan117, Jacobp117
Fandoms: Halo (Video Games) & Related Fandoms
30 Nov 2025
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Four-and-a-half years after the end of the Human Covenant War, Spartan John-117 and the UNSC Artificial Intelligence Cortana continue their story. Marooned on the mysterious world of Requiem, John must contend with the potential loss of his trusted friend and companion, as she begins to suffer the early onset of A.I. Degeneration-Rampancy.
But getting her help will not be easy. The Covenant have reformed under a new leader, and have come to this unknown world, seeking, and allying with, an ancient evil buried within, whose grudge against humanity is older than the Halos themselves.
But Chief won’t be alone. His Spartans in arms, Blue Team, led now by Spartan Jun-A266 of Noble Team, have arrived alongside the UNSC Infinity. In the wake of the Infinity’s crash landing on the planet, and beset on all sides by secrets, enemies, and shattered dreams, can the legendary Spartans stand against the mysterious Forerunner known only as the Didact? And will they be able to save Cortana, in the end?
Series
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Guardians of the Multiverse (That Time My OP Portal Skill Broke All of Fiction) by TheLonelyRanger
Fandoms: Star Wars: The Clone Wars (2008) - All Media Types, Star Wars - All Media Types, Star Wars: Rebels, Halo (Video Games) & Related Fandoms, Ratchet & Clank, Re:ゼロから始める異世界生活 | Re:Zero Starting Life in Another World (Anime), Star Trek: Enterprise, Star Trek: The Next Generation, Star Trek: Voyager, Marvel Cinematic Universe, The Culture - Iain M. Banks, ダンジョンに出会いを求めるのは間違っているだろうか | DanMachi | Is It Wrong to Try to Pick Up Girls in a Dungeon? (Anime), Shingeki no Kyojin | Attack on Titan, Mass Effect Trilogy
29 Nov 2025
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OC MC. OC x Ahsoka. OC POV mostly. This is a huge multi crossover from an ai dungeon playthrough. Edited of course. Several factions find themselves on The Liminal Nexus, a forerunner shield world that connects the multiverse. The Main Antagonist is the banished, the Didact, the flood, and The Witch Cult, though there are others. The POV is mostly Bubba the OC but eventually I found out how to do other POVs in the ai dungeon game, much later. The characters are shown on a bit of a rotating basis through the MCs POV. While the story itself generaly rotates between issue, talks, fighting and ealing with issue, resolution, downtime, training, issue, repeat.
Trauma, relationships, Sci-Fi, action adventure, huge cast, therapy, big battles, sparring, ship combat, found family.Series
- Part 1 of Guardians of the Multiverse
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The Song of Infinity by Johnnieboy11
Fandoms: Star Wars: The Clone Wars (2008) - All Media Types, Halo (Video Games) & Related Fandoms
16 Nov 2025
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(Posted from Fanfiction.net account) 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.
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A Spartan's Oath by Jack_Fireson
Fandoms: Halo (Video Games) & Related Fandoms, Dungeons & Dragons (Roleplaying Game)
16 Nov 2025
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50 years after arriving in Faerun, Sir John of Spartan and Cortana, The Machine Spirit, finally return home.
Now faced with a race against time to save all he loves, The Master Chief will face his greatest challenge yet.The reclamation has begun and all shal bare witness
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My Friendship with a Supersoldier by Johnnieboy11
Fandoms: My Adventures with Superman (Cartoon), Halo (Video Games) & Related Fandoms
04 Nov 2025
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A few months before Clark Kent would join the Daily Planet as an intern alongside his friend, Jimmy Olsen, two new figures would drop in amidst Metropolis's busy streets, the first among many future allies to Superman. As threats arise all around, unity will be necessary in order for the Soldiers and Superman to win the day.
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The Human, The Machine, and Everything Between by Bloos_Bizarre_Daydreams (BlueGreen_Phoenix)
Fandoms: Halo (Video Games) & Related Fandoms
02 Nov 2025
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After losing everything, (No way home, no home to return to, no UNSC, no Spartans… no Blue Team.) John found himself living with what remains of Humanity on Zeta Halo with Esparza and Joyeuse. Five years of rediscovering how to live, how to be human, and how to find peace has changed the Legendary Master Chief into someone only physically recognizable.
Only to be ripped from this peace and dumped into an old nightmare thought to have been settled and laid to rest.
He’s not the only one who becomes stranded out of place and out of time.
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Halo: Combat Re-Evolved by SpaceCowboy2013
Fandoms: Halo (Video Games) & Related Fandoms
22 Oct 2025
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An AU War story. Humanity fights to hold on against the Covenant onslaught behind fortified Inner colonies as the Battle of Sigma Octanus IV rages. Captain Jacob Keyes and the Spartans are recalled to Reach to prepare for a mission to bring an hopeful end to the war - and vengeance to the Covenant Homeworld. But are they already too late to save Earth from being found?
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Stargate:Spartan Siege by Johnnieboy11
Fandoms: Stargate SG-1, Halo (Video Games) & Related Fandoms
21 Oct 2025
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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.
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“The only way home is straight through the heart of The Banished.”
Master Chief Petty officer John 117…
The only name he has ever known. Many shout cheers of joy at the name, others scowl in disgust, and there are those who wish nothing more for the name to be erased from history; but a name with such reputation doesn’t go out quietly.
As The Banished regroup after their cascade from victory at the hands of the Master Chief, the Spartan is already hunting down his next mission, to finish the fight. But as a galactic siren song sweeps across the stars, he comes face to face with old shadows from the past, memories warped into and disturbing reality and open wounds that refuse to heal.
John must tackle his greatest battle yet. No fight or war will ever compare to the conflict he must conquer, and no amount of training will prepare him for the inevitable surprises that the galaxy has in store. -
The Forerunner Effect by Rowen6
Fandoms: Halo (Video Games) & Related Fandoms, Mass Effect Trilogy
08 Oct 2025
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After exploring a Forerunner station, the Master Chief, along with a combined fleet of the UNSC and the Swords of Sanghelios, ends up in the Mass Effect universe. Unfortunately for the Master Chief, he was separated from his team and ended up on a station full of scum and villainy. Luckily for him, though, he ended up saving a quite talented Quarian engineer who was quite knowledgeable about where they were. Now, can he find his way back to his Fleet with the help of his new Ally, or will he be lost forever?
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Follows a duo of Gamma Company Spartan III's (Nico G-038 and Valerie G-228) during the Battle for Earth and past the end of the war, jumping time periods in the form of mission logs.
The name of the story comes from a Shadow of Intent song on "Imperium Delerium".
- Language:
- English
- Words:
- 3,442
- Chapters:
- 1/?
- Kudos:
- 2
- Hits:
- 38
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Homeward Bound:The Human-Covenant War by Johnnieboy11
Fandoms: SIGNALIS (Video Game), Halo (Video Games) & Related Fandoms
25 Sep 2025
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As the Human-Covenant War rages on in the year 2552, the UNSC gathers the best of its SPARTANs on the Planet Reach in a final bid to buy themselves time against the encroaching tide of the Alien monsters that have murdered many billions of their kin. In the meanwhile, a UNSC Patrol Ship orbiting the outer areas of the Epsilon Eridani system picks up an unknown vessel as it floats aimlessly through the void. What comes aboard said ship might be the very key to saving Mankind, second only to Master Chief himself.
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Modern Day Spartan by SomeHaloGuy
Fandoms: Halo (Video Games) & Related Fandoms, Halo (TV 2022)
12 Sep 2025
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John is just your normal teenager living in New York, until he finds a suit of armor that gives him strength and abilities he’s only dreamed of having!
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Mass Effect: Galactic Turmoil by EndriRigs
Fandoms: Halo (Video Games) & Related Fandoms, Mass Effect Trilogy
02 Sep 2025
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On the Illusion of Might by evevee
Fandoms: Halo (Video Games) & Related Fandoms, Mass Effect Trilogy
29 Aug 2025
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Summary
We thought ourselves powerful, able to conquer a galaxy with nothing but toys. When we overcame every challenge, breached the space between the galaxies themselves, what use were the words of a race ashamed of their own past? Yet we cannot deny that we were warned, for while a challenge to a human is laughable, a challenge to humanity is a death sentence.
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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. And who is to say that once the first threats are over, another will not rise to take its place. If only he knew who was truly pulling the strings. A Naruto and Halo world merged with bits of others like Star Wars and Mass Effect. Maybe more. Based in the Halo world and timeline but with the Naruto world added to it.
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Libera Terra by Johnnieboy11
Fandoms: Half-Life (Video Games), Halo (Video Games) & Related Fandoms
14 Aug 2025
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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
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An Engineering Marvel by gardengalaxy
Fandoms: Halo (Video Games) & Related Fandoms, Halo (TV 2022)
02 Aug 2025
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After a long day of banging out Spartan sized hand indents in Pelicans when you could have been working on your many side projects, you just want to go back to your two mouser cats and call it an evening.
That hunk of soldier down in the seldom used labs trying to do DIY mechanics on his gauntlet with one working hand interrupts that.
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Mobile Suit Gundam:The War of Reunion by Johnnieboy11
Fandoms: 機動戦士ガンダム 水星の魔女 | Mobile Suit Gundam: The Witch from Mercury (Anime), Halo (Video Games) & Related Fandoms
28 Jul 2025
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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.