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Parasites Abound by Faithless wanderer
The primordial became part of the flood but it did not simply become part of the gravemind no instead it watched over the war and when the halos rings fired it took over and set events in motion that would forever change the fate of another galaxy
Crossover - Halo & Mass Effect - Rated: K - English - Sci-Fi/Adventure - Chapters: 1 - Words: 1,519 - Favs: 1 - Follows: 2 - Published: 6h
Walk Or Die by Ellight1 reviews
what if Halsey need a sort of second wave of spartan II ? well in that story that's what she need . the first contact with the covenant have already been made and is hiden from the population and project spartan III isn't finish yet and humanity must have more super soldier if she want to survive the alien superforce ... (TEAM RWBY are here , AU . no super-power)
Crossover - RWBY & Halo - Rated: T - English - Chapters: 2 - Words: 6,277 - Reviews: 1 - Favs: 1 - Updated: 7h - Published: 8/21 - C. Halsey, A. J. Johnson, Team RWBY, OC
Spirit of Fire by Project Ray reviews
What happens when the crew of the Spirit of Fire wakes up decades later when they find a signal in an unknown world where magic and primitive humans exist? And how the people of Runaterra will react to the existence of humans from another world with a unimaginable power? The truth is that a great danger is out there.
Crossover - Halo & League of Legends - Rated: T - English - Fantasy/Sci-Fi - Chapters: 3 - Words: 11,310 - Reviews: 15 - Favs: 21 - Follows: 38 - Updated: 11h - Published: 7/18 - J. Forge, J. Cutter, Katarina, Lux
Operation: CAVALRY by M306117
With the arrival of the UNSC battlegroup, life in Equestria can finally start back on the path to normality but threats, new and old, threaten the precarious peace on the war torn planet.
Crossover - My Little Pony & Halo - Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 4,673 - Published: 8/22
Merged Galaxy Part 1: Tenuous Pacts by Slipspace Anomaly reviews
Nations collide as 2 alternate versions of the Milky Way Galaxy are joined into 1. As members of the SGC and the UNSC struggle to establish peaceful relations, a new threat emerges. One that includes new enemies from each of their pasts. Co-written with Jon Harper.
Crossover - Stargate: SG-1 & Halo - Rated: T - English - Chapters: 12 - Words: 83,347 - Reviews: 94 - Favs: 159 - Follows: 237 - Updated: 8/21 - Published: 1/30 - H. Maybourne, OC, Master Chief/John-117, C. Halsey
The Didacts' shout by Faasnu Briinah reviews
(SPOILER: H4 & Skyrim) Starting with the end of Halo 4, we follow The Didact's new and unexpected quest as the Dragonborn. Lydia becomes his follower, as the two work to defeat Alduin, great bane of old, as well as accomplish various quests, make decisions, and stop the awakening enemy in Solstheim. Rated M for violence, blood/gore, and mild language. @343/Bethesda
Crossover - Halo & Elder Scroll series - Rated: T - English - Adventure - Chapters: 22 - Words: 40,496 - Reviews: 105 - Favs: 68 - Follows: 86 - Updated: 8/21 - Published: 12/23/2012 - Didact, Alduin, Lydia, Miraak
Beyond the Veil by Jase Sierra-412 reviews
Mike Company, 3 Batt/6 Reg, 121 Marines is being reformed. The new Executive Officer has the challenge of getting the unit back in shape for the next rotation. They just received their last recruits when an incident kicks off their deployment early. Meanwhile, in a galaxy not too far away, a team has defied orders to perform a rescue, but have found the unimaginable in the process.
Crossover - Star Wars & Halo - Rated: T - English - Chapters: 7 - Words: 15,896 - Reviews: 10 - Favs: 24 - Follows: 38 - Updated: 8/20 - Published: 3/4 - Ahsoka T., Arbiter, P. Cole, OC
The Spartans of Mandalore by hswatton147922 reviews
They called us the best. Didn't feel like it sometimes. But this, this was a chance. A chance to make the best, to have a true, lasting legacy that will be heard across the whole galaxy. This was my chance to change it all and to truly make the greatest soldiers this galaxy had ever seen. Better than all the rest. Maybe then this new title of mine won't weigh me down so much.
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi - Chapters: 40 - Words: 204,262 - Reviews: 152 - Favs: 143 - Follows: 180 - Updated: 8/20 - Published: 6/3 - Master Chief/John-117, Cortana
Halo: The Mediterranean Crisis by Dinosaur Mercenary reviews
A sequel to Time Crisis: An Unlikely Mission and an alternative to Time Crisis 3. After the events of Halo 3 and during Time Crisis: The Ring Crisis, Master Chief got involved in the Mediterranean Crisis.
Crossover - Halo & Time Crisis series - Rated: T - English - Sci-Fi - Chapters: 6 - Words: 9,899 - Reviews: 5 - Favs: 5 - Follows: 5 - Updated: 8/19 - Published: 11/24/2016 - Master Chief/John-117, Cortana, Alicia W., Zott G.
The Spartan Crew Member by Daisy Rhine reviews
Commander Sheppard and his crew find the other half of the ship that MC is on. When they find him they have no idea what they should expect but an chemically supped up human was not one of them. I don't own Halo or Mass Effect Bungie and BioWare do.
Crossover - Halo & Mass Effect - Rated: T - English - Friendship/Adventure - Chapters: 2 - Words: 8,755 - Reviews: 13 - Favs: 21 - Follows: 35 - Updated: 8/18 - Published: 8/14 - Master Chief/John-117, Garrus V., Tali'Zorah, Shepard (M)
The Twin Spartans (The Story of Percy Jackson rewrite) by Kaidon of Mdama reviews
Perseus and Persephone Jackson have been known to be many things. ls. But there was a time when they were referred to as Spartans, and Heroes. Disclaimer: I don't own PJO or Halo, that belongs to Rick Riordan and 343 Industries. Reviews are greatly appreciated. An AU story
Crossover - Halo & Percy Jackson and the Olympians - Rated: T - English - Family/Adventure - Chapters: 21 - Words: 91,188 - Reviews: 23 - Favs: 37 - Follows: 51 - Updated: 8/18 - Published: 9/5/2015 - SPARTAN-B312/Noble Six, Annabeth C., Percy J.
Dance with the Devil by ghost company reviews
Vader had everything planned out. At first he had thought that it was all over. He had no one left to live for but himself. That all changed a few years ago. Now he's playing a deadly game with his master. However, when the force throws in another variable, will Vader be able to complete his plans and more importantly who will he be when it's all done? Anakin, or Vader?
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi/Adventure - Chapters: 24 - Words: 107,261 - Reviews: 62 - Favs: 137 - Follows: 166 - Updated: 8/18 - Published: 6/14/2016 - Darth Vader, Thrawn, Master Chief/John-117, T. Hood
Halo: A New Frontier by MS-B235 reviews
When a military task force goes missing in unexplored space, the UNSC stumbles upon an entirely different universe.
Crossover - Halo & Star Wars: The Clone Wars - Rated: T - English - Chapters: 2 - Words: 3,844 - Reviews: 1 - Favs: 7 - Follows: 8 - Published: 8/17
The Covenant War: Book I: Hero of Courage by SoftWare Publishing reviews
Shawn Hodgson is just an ordinary teenager living in a village in the middle of nowhere. One day, he gets pulled into another world, with multiple challenges, and lots of surprises at every turn, all to discover that he is the reincarnation of the ancient Hylian Heroes. Not only that, but the Covenant, who should not exist, are invading Hyrule. Can he and his new allies defeat them
Crossover - Legend of Zelda & Halo - Rated: K - English - Adventure/Mystery - Chapters: 3 - Words: 2,269 - Reviews: 2 - Follows: 1 - Updated: 8/17 - Published: 2/3 - Link, Zelda, Ganondorf, Arbiter
The Praetor And the Spartan by drogorath reviews
SO this is a first, I assume. What if Master Chief meets an older Reyna. Will sparks fly? Hope you like it FUTURE
Crossover - Halo & Percy Jackson and the Olympians - Rated: T - English - Tragedy/Hurt/Comfort - Chapters: 7 - Words: 8,556 - Reviews: 12 - Favs: 22 - Follows: 28 - Updated: 8/16 - Published: 11/1/2016 - Master Chief/John-117, Cortana, Reyna R., Hazel L.
Gate: Los spartans fueron a pelear ahí by aguilanegra7734 reviews
En el planeta de Reach, en nueva Alejandría, una puerta misteriosa aparece y resulta ser el conector entre dos mundos, la ONI envía a fuerzas de la UNSC a explorar estas tierras nuevas y para ello requerían ayuda del equipo azul, noble y otros mas
Crossover - Gate - Jietai Kare no Chi nite, Kaku Tatakeri & Halo - Rated: K+ - Spanish - Humor - Chapters: 7 - Words: 29,603 - Reviews: 37 - Favs: 12 - Follows: 15 - Updated: 8/14 - Published: 3/29
Spartan Commando by HeyMrJack reviews
"The Master Chief is dead" is what everyone in the UNSC believes. That he died heroically fighting and successfully defeating, The Covenant. However, it appears fate has other plans for the legendary soldier. The Forward Unto Dawn has traveled to a different galaxy, and it seems fate, or the force itself wishes to have Master Chief fight for The Galactic Republic.
Crossover - Star Wars & Halo - Rated: T - English - Sci-Fi - Chapters: 1 - Words: 4,480 - Reviews: 10 - Favs: 25 - Follows: 46 - Published: 8/14 - Anakin Skywalker, E. Palpatine, Master Chief/John-117, Cortana
Feet First: Landfall by M306117 reviews
ODST GySgt Michael Fletcher, abducted mid-drop, finds himself in a world of colourful talking ponies.
Crossover - My Little Pony & Halo - Rated: T - English - Adventure/Sci-Fi - Chapters: 2 - Words: 4,000 - Reviews: 2 - Favs: 4 - Follows: 6 - Updated: 8/14 - Published: 5/7
The Cycle by Church Shepard reviews
Fighting off extinction Shepard must find the legacy left to humanity by the Forerunners. And find a way to defeat both the Reapers and the Prophet of Truth from gaining the power to destroy all sentient life in the Galaxy.
Crossover - Halo & Mass Effect - Rated: T - English - Sci-Fi/Adventure - Chapters: 42 - Words: 122,678 - Reviews: 129 - Favs: 63 - Follows: 82 - Updated: 8/14 - Published: 8/29/2012 - Arbiter, Prophet of Truth, Shepard (M), OC
Long Lost Friends by Animeak116 reviews
When Halsey managed to make a slipspace drive entire another alternate universe. She took a special child from it and made him a Spartan ll. Though while he was getting better he found himself as ONIs personal assassin on inserrectionists and Covenant alike. Will he get back home? Or will he die on reach. If he does come home what will happen when he can't remember his best friend?
Crossover - Halo & Infinite Stratos/IS<インフィニット・ストラトス> - Rated: T - English - Sci-Fi/Friendship - Chapters: 3 - Words: 11,518 - Reviews: 2 - Favs: 10 - Follows: 10 - Updated: 8/14 - Published: 7/15 - [OC, Houki S.] 343 Guilty Spark, Ichika O.
The Lost Primarchs: Spartan by ExiledAdrian reviews
AU for both 40k and Halo. Michael 002 is a candidate for the Spartan program. But he's not like the others. He's smarter, faster, stronger, more mature. As he rises, others fall. The galaxy is about to go to war. Torn from family and home, he now fights for humanity. But in the darkness of his future, there is only war.
Crossover - Warhammer & Halo - Rated: T - English - Adventure/Sci-Fi - Chapters: 16 - Words: 36,009 - Reviews: 66 - Favs: 46 - Follows: 68 - Updated: 8/13 - Published: 2/24
Remnant of Noble by The Chosen Writers reviews
Reach, is lost. With one final push to survive the dead planet, Noble Six uncovers a forerunner structure buried underneath the surface of Reach. But it wont be easy. From one dead planet, to one where humanity fights to survive. Noble Six can make a choice: Continue to fight for humanity, or… watch from the sidelines. (Rated T for Cursing) Female!Noble Six
Crossover - Halo & RWBY - Rated: T - English - Adventure - Chapters: 14 - Words: 55,551 - Reviews: 43 - Favs: 103 - Follows: 148 - Updated: 8/13 - Published: 4/7 - [SPARTAN-B312/Noble Six, Pyrrha N.] Team RWBY, Team JNPR
Gargantia on the Verdurous Planet and Halo Reach crossover by nicholas h reviews
noble 6 is in a new word. what will he do with no war?
Crossover - Halo & Gargantia on the Verdurous Planet/翠星のガルガンティア - Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 508 - Reviews: 1 - Published: 8/13 - SPARTAN-B312/Noble Six, Amy, Ledo, Ridget
Star Wars: Halo at war by reza0807 reviews
Darth Sidious, emperor of the Galactic Empire, used his foresight along with his cunning mind to rise to power. His visions allowed him to eliminate any threat to his rule. Now the Dark Side whispers of a weakened yet worthy foe in a neighboring galaxy. The war machine of the Empire is now giving its undivided attention to the UEG and its protector the UNSC. A new war has begun...
Crossover - Star Wars & Halo - Rated: T - English - Adventure - Chapters: 6 - Words: 53,712 - Reviews: 86 - Favs: 69 - Follows: 89 - Updated: 8/13 - Published: 6/27
The Lost Civilization by Apollonir reviews
After the Battle of the Ark, a UNSC Pelican dropship crash lands on Thessia. Two ODSTs survive the crash and make contact with primitive Asari. Ninety thousand years later, Liara T'Soni discovers a strange looking aircraft and Human remains in an ancient cave burial chamber. The discovery she makes will take the Asari on a journey to discover their true lineage.
Crossover - Halo & Mass Effect - Rated: T - English - Mystery/Suspense - Chapters: 4 - Words: 8,685 - Reviews: 187 - Favs: 515 - Follows: 781 - Updated: 8/13 - Published: 7/2 - Ashley W., Liara T'Soni, Mordin S., Shepard (M)
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