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War of the Hearts by World Archivist
The Human-Covenant war had left an undeniable scar on the galaxy. Now in the year 2553, a new enemy shall appear, and a new war shall begin, one with origins in a time before the Halo Array.
Crossover - Halo & Kingdom Hearts - Rated: M - English - Sci-Fi - Chapters: 1 - Words: 1,398 - Favs: 2 - Follows: 3 - Published: 4/19
Mantle of Responsibility by GeorgeQuartz reviews
10 Years after the Human-Covenant war and an Alliance between the Sangheili and Humanity keeps that Milky Way stable, soon though, a dead battlefield is discovered and the discovery encounter leads to UNSC military forces being deployed to the edge of the Andromeda Galaxy, also known as...The Outer Rim. (21BBY & 2564 AD Story start year)
Crossover - Halo & Star Wars - Rated: T - English - Sci-Fi - Chapters: 28 - Words: 282,555 - Reviews: 411 - Favs: 950 - Follows: 1,075 - Updated: 4/18 - Published: 6/17/2020 - Ahsoka T., Fives, Rookie, OC - Complete
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: 1 - Words: 9,223 - Reviews: 7 - Favs: 53 - Follows: 66 - Published: 4/16 - OC, V, Johnny Silverhand, Rogue A.
In Fire Forged (StargateHalonBSG fusion) V2 by Illuviar reviews
The Goa'uld System Lords led by Ra fight for survival and domination against the Covenant. The Prophets in their lust for power have proclaimed Humanity's extermination, and decreed the destruction of the False Gods. Long dormant and forgotten Stargates come to life to bring UEG's Earth and the Colonies of Cobol into a bloody contact with the galaxy at large...
Crossover - Stargate: SG-1 & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 19 - Words: 68,079 - Reviews: 72 - Favs: 134 - Follows: 188 - Updated: 4/15 - Published: 3/26 - J. O'Neill, Master Chief/John-117
A different journey by Dragon Cat84 reviews
The Master Chief is found by the Atlantis Expedition, how did the Master Chief end up in the early 21st Century and in the Pegasus Galaxy?
Crossover - Halo & Stargate: Atlantis - Rated: T - English - Chapters: 7 - Words: 28,078 - Reviews: 23 - Favs: 54 - Follows: 85 - Updated: 4/15 - Published: 3/24
Stained Ambition by Halgen reviews
We’ve been separated for too long. Enough is enough. The Covenant, ONI, and now a literal god. Well… bring it for I’m a warrior from beyond the stars and… I have been given a chance. One. That. I. Will. Take. A safe haven for both us, a place where we could be brother and sister again. For we were together before and we will be together in the end. We promised after all.
Crossover - Halo & Genshin Impact - Rated: M - English - Adventure/Sci-Fi - Chapters: 7 - Words: 53,486 - Reviews: 13 - Favs: 40 - Follows: 56 - Updated: 4/14 - Published: 7/17/2023 - OC, Aether, Paimon
The Fifth-Race Reclaimers: Upheaval by Piero217 reviews
Over the course of eight months following their triumph over the Precursor threat, the Fifth-Race Reclaimers have been working hard to learn more about each other and their respective galaxies—sometimes without the other side even knowing. But with a new threat looming on the horizon, will they be prepared to defend every living creature they have been entrusted with?
Crossover - Stargate: SG-1 & Halo - Rated: T - English - Sci-Fi/Drama - Chapters: 3 - Words: 8,405 - Reviews: 11 - Favs: 74 - Follows: 105 - Updated: 4/14 - Published: 6/8/2019 - S. Carter, D. Jackson, Teal'c, Arbiter
Operation: WASTELAND by Spartan-049 reviews
Whilst exploring the depths of Gamma Halo, a lone Spartan inexplicably finds himself transported to an irradiated wasteland on a planet that shouldn't have one; Earth. Hoping to find some answers he enlists the help of a local courier already on a quest of his own to find something.
Crossover - Fallout & Halo - Rated: T - English - Adventure/Western - Chapters: 6 - Words: 18,679 - Reviews: 6 - Favs: 27 - Follows: 39 - Updated: 4/14 - Published: 2/2
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: 29 - Words: 119,550 - Reviews: 212 - Favs: 736 - Follows: 920 - Updated: 4/14 - Published: 3/23/2023 - Anakin Skywalker, Ahsoka T., Master Chief/John-117, T. Lasky
Debt unpaid by Dgreen20 reviews
Some debts can't be wiped away. A monetary debt can be paid off in time, but a life debt can never truly be repaid. A super soldier, torn from the losing end of a war for humanity's survival. A girl, trapped in a tower her entire life. How can the soldier who has nothing, repay a woman who yearns for her freedom? "Don't make a girl a promise, if you know you can't keep it".
Crossover - Halo & BioShock - Rated: T - English - Adventure/Sci-Fi - Chapters: 11 - Words: 75,560 - Reviews: 25 - Favs: 86 - Follows: 130 - Updated: 4/13 - Published: 12/3/2017 - [OC, Elizabeth] Booker D.
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: 7 - Words: 27,157 - Reviews: 54 - Favs: 120 - Follows: 149 - Updated: 4/13 - Published: 9/8/2023 - Rodney M., John S., OC
Justice League of Amazons: Halo by Angry lil' elf reviews
In a world where the rogue Amazon Aresia succeeds in her plan to wipe out all men on Earth, she has doomed humanity to extinction and a newly reformed Justice League must try and salvage the world. But hope is not lost and it comes in the form of a Spartan II Commando and his AI from another universe. His name: Master Chief Petty Officer John-117.
Crossover - Halo & Justice League - Rated: M - English - Sci-Fi/Adventure - Chapters: 19 - Words: 103,704 - Reviews: 362 - Favs: 1,165 - Follows: 1,189 - Updated: 4/13 - Published: 1/13/2016 - Master Chief/John-117, Diana of Themyscira/Wonder Woman, Shiera H./Shayera Hol/Hawkgirl
Fleet of the Homeward Bound: Book two by Sora with an S reviews
Spirit of Fire, Hyperion, Jupiter II, Archangel and a few Firestorms just want to know where they are and how to get home. Also, they want to know why they're all girls in space now.
Crossover - StarCraft & Halo - Rated: T - English - Chapters: 2 - Words: 15,601 - Reviews: 12 - Favs: 29 - Follows: 42 - Updated: 4/12 - Published: 8/9/2023
Noble 6: Ghost of Reach by thermalsnipern7 reviews
The war against the Covenant ended, but something else pressed humanity to the verge of extinction like they never did. Now, Noble 6 rises again to defend humanity like he had done before, and make humanity into something strong like it was so long ago. The one thing his enemies keep wondering is why they hear boss music.
Crossover - Halo & Destiny - Rated: M - English - Sci-Fi/Romance - Chapters: 12 - Words: 55,260 - Reviews: 41 - Favs: 136 - Follows: 161 - Updated: 4/12 - Published: 7/31/2022 - [SPARTAN-B312/Noble Six, Fallen]
Eye of Aegis by UNSC Kawakaze
Eye of Aegis, a Halo x Azur Lane crossover with one Teutonic demoness in particular, but with some twists. (Pre Human-Covie War, moderately OP MC)
Crossover - Halo & Azur Lane/碧蓝航线 - Rated: T - English - Sci-Fi - Chapters: 3 - Words: 14,184 - Favs: 15 - Follows: 19 - Published: 4/12 - [Prinz Eugen, SPARTAN-B312/Noble Six] P. Cole, M. Stanforth
Rebirth of the UNSC by ultimate Deathsaurer 2 reviews
Reach has Fallen and the Pillar of Autumn has set a course to earth but not the earth they remember. Adopted from Original Owner: Samsara Sage
Crossover - Stargate: SG-1 & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 18 - Words: 66,336 - Reviews: 325 - Favs: 608 - Follows: 747 - Updated: 4/11 - Published: 10/12/2014
Touhou: Illusionary World and the Ghost of Reach by The Mighty Soryuz reviews
A Spartan never goes quietly into the howling dark to never return, left on the dying planet Reach a Lone Wolf will make peace with his life, and be put into the chance of a new life. Boundaries rift open and a Ghost drifts among Youkai, now to find his new place in a Fantastical Land of Status-Quo. His arrival may herald a new coming incident, but his abilities will prove vital.
Crossover - Halo & Touhou Project - Rated: M - English - Supernatural/Romance - Chapters: 1 - Words: 2,846 - Reviews: 4 - Favs: 9 - Follows: 16 - Published: 4/11 - SPARTAN-B312/Noble Six, Marisa K., Reimu H.
Halo - So Say We All by SpaceCowboy2013 reviews
It started with the Pillar of Autumn initiating contact between lost branches of humanity. And ended with branches of humanity fighting together on a dying Battlestar. Will the Colonies survive a threat that puts the Cylons to shame? Can two cultures avoid fighting each other and unite to survive a war greater than any struggle humanity has ever faced?
Crossover - Halo & Battlestar Galactica: 2003 - Rated: T - English - Sci-Fi/Suspense - Chapters: 1 - Words: 15,360 - Reviews: 21 - Favs: 37 - Follows: 55 - Published: 4/11 - Master Chief/John-117, J. Keyes, L. Adama/Apollo, K. Thrace/Starbuck
Bellum Terranum by F35B reviews
Humanity has long since recovered from the effects of the Human-Covenant War, beginning to resettle and rebuild. The Quarians, with help from the Council, have also begun to rebuild their fallen civilization, settling pre-approved Council planets finally settling after surviving the Morning Wars. One pirate attack on a Quarian Colony however will alter the course of history...
Crossover - Halo & Mass Effect - Rated: M - English - Sci-Fi/Adventure - Chapters: 4 - Words: 34,252 - Reviews: 215 - Favs: 494 - Follows: 778 - Updated: 4/11 - Published: 7/31/2023
War of the Hearts (OLD) by World Archivist reviews
Some say that for humanity, the storm passed with the Covenants destruction. But little do they know, a new and far more powerful enemy has been lurking in the shadows, and is ready to strike. Halo and Kingdom Hearts AU. OC X multiple. Reviews are welcome.
Crossover - Halo & Kingdom Hearts - Rated: M - English - Sci-Fi/Suspense - Chapters: 8 - Words: 14,204 - Reviews: 5 - Favs: 11 - Follows: 9 - Updated: 4/11 - Published: 3/28/2019
Reclaimers of Both Worlds by Little Freddy Stories reviews
After a life threatening battle against the Covenant, Noble Six makes his last stand until a strange event occurred. Bringing the two worlds more closer than what is initially thought when a boy from the other side starts feeling the side effects of such an event. AU of a what if to the two IP's, first published story on this website so any feedback is heavily welcomed.
Crossover - Halo & Please don't bully me, Nagatoro/イジらないで、長瀞さん - Rated: T - English - Sci-Fi/Romance - Chapters: 2 - Words: 19,725 - Reviews: 3 - Favs: 21 - Follows: 30 - Updated: 4/10 - Published: 1/13 - SPARTAN-B312/Noble Six
New Horizons by 2 good 2 kill reviews
The Master Chief has finally lost everything. Halsey, his team, and finally Cortana. Where he may have chosen death, fate has set a new task before him with a new team. They will have to face down foes of incredible might and will have to rely on one another if they ever wish to see home again.
Crossover - Marvel & Halo - Rated: T - English - Adventure/Sci-Fi - Chapters: 11 - Words: 80,533 - Reviews: 123 - Favs: 200 - Follows: 219 - Updated: 4/9 - Published: 1/3/2014 - Master Chief/John-117, Rtas 'Vadumee, S. Palmer
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: 12 - Words: 91,393 - Reviews: 93 - Favs: 196 - Follows: 246 - Updated: 4/9 - Published: 8/24/2023 - Master Chief/John-117, Arbiter, 343 Guilty Spark, C. Halsey
Starting a new faction in the Halo universe with StarCraft Technology by CaptainKriss S5-SIERRA-117 reviews
Jean Razak just a regular normal young adult with a balanced lifestyle between gaming,study and work. Somehow out of nowhere he was transported to another planet with similar environments to earth. He gained power called [SYSTEM] to summon the StarCraft Terran faction unit. Can he survive and return to his original home
Crossover - Halo & StarCraft - Rated: T - English - Sci-Fi/Parody - Chapters: 2 - Words: 4,247 - Reviews: 2 - Favs: 33 - Follows: 37 - Updated: 4/9 - Published: 3/29
The Ultimate Warrior - DC Justice League version by long night of solace reviews
Humanity is an impressive intergalactic empire. When John-117, supreme commander of human military and his AI friend Cortana discovers a mysterious signal from another universe, the truths and the hidden secrets will force them to ally with the native heroes on a race to save the multiverse.
Crossover - Halo & Justice League - Rated: T - English - Adventure/Sci-Fi - Chapters: 10 - Words: 142,980 - Reviews: 33 - Favs: 178 - Follows: 195 - Updated: 4/8 - Published: 5/8/2020
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