Halo and Mass Effect Crossovers
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Adeptum Effectus by Reddevel360 reviews
"Killing a man will harden you. Fighting a war against genocide will harden a species. Why are we so ruthless Councilor? Because when fighting for your very existence, anything is acceptable."-Lord Hood. Featuring a Humanity that discovered the archives on Mars in the midst of fighting an war for their very survival, a war that destined to be a massacre turns into a stalemate -Hia
Rated: M - English - Sci-Fi/Tragedy - Chapters: 14 - Words: 90,584 - Reviews: 842 - Favs: 2,188 - Follows: 2,971 - Updated: 19h - Published: 5/10/2019 - Master Chief/John-117, T. Hood, Admiral Hackett, Councilor Sparatus
Catalog of War by hunter 139 reviews
A collection of one shots about events, including battles, conflicts and skrimishes, that occur in the shared multiverse of my stories. I do not own any of the franchises that appear in this series. Multicrossover.
Rated: T - English - Sci-Fi - Chapters: 25 - Words: 52,609 - Reviews: 22 - Favs: 34 - Follows: 30 - Updated: 8/14 - Published: 4/21/2015
Mass Effect: Lost Son of Terra by Ares007 reviews
The Reapers had a system. They let Civilizations grow, then harvested once they were at their peak. What will happen when a wrench is thrown into that system in the form of Erwin Wolff. A broken man whose sole purpose was to kill Xenos. Pulled into a Xenophilic Galaxy. How will he deal with the Mass Effect trap and navigate new aspects of his life?
Rated: M - English - Adventure/Romance - Chapters: 10 - Words: 93,746 - Reviews: 11 - Favs: 73 - Follows: 95 - Updated: 8/13 - Published: 6/29 - [SPARTAN-B312/Noble Six, Oriana L.] [Shepard, Miranda L.]
Final Reclamation Halo Wars by harambe117 reviews
master chief finds himself in a new galaxy with its own dark secrets lurking in black space. A new revelation is about to begin
Rated: M - English - Sci-Fi/Fantasy - Chapters: 1 - Words: 14,072 - Reviews: 7 - Favs: 13 - Follows: 20 - Published: 8/5
A Whole New World by Spartan III Commando reviews
Noble six's story didn't end on Reach, he escaped the dead planet after saving the Pillar of Autumn, and he and 117 fought across each Halo, until an incident sent him to the world of Mass Effect. He is still struggling to overcome the demons he has gained from his life, from the day he saw his family killed, Reach, and the Halos. But a unsuspecting woman may be able to help him...
Rated: M - English - Sci-Fi/Adventure - Chapters: 5 - Words: 19,985 - Reviews: 30 - Favs: 141 - Follows: 211 - Updated: 8/4 - Published: 7/7/2016 - SPARTAN-B312/Noble Six
Rookies return by predator1701 reviews
Its been eight years since the end of the Reaper War, ten years since the creation of the Coalition. Now after many years of rebuilding Rookie is called back to command the Coalitions' latest exploration vessel. His mission, to explore strange new worlds, to seek out new life and new civilizations to boldly go into battle where none have battled before
Rated: T - English - Sci-Fi/Romance - Chapters: 1 - Words: 5,263 - Reviews: 1 - Favs: 9 - Follows: 7 - Published: 8/2 - Complete
Once a Rookie, Always a Rookie by Twisted Fate MK 2 reviews
(Credit to Adrasos on Archive and his story, Prepare to Drop, for the idea.) On the way down to New Mombasa, Rookie falls into the Slipspace Rupture and ends up crashing down on Menae, high above Palaven, while Shepard tries to find and rescue the new Primarch. From there, the war itself will shift and the fighting persists, but who knows what an ODST will add to the mix.
Rated: T - English - Adventure - Chapters: 62 - Words: 293,819 - Reviews: 579 - Favs: 1,038 - Follows: 1,323 - Updated: 7/31 - Published: 9/27/2018 - Rookie, Shepard, Javik - Complete
The Reclamation by Fade Maybe reviews
Through ONI's manipulation, the UNSC stumbles upon a Mass Relay and is dragged into a new war. They'll discover the battered races of the Citadel, the political intrigue of its factions, and a second group of humans governed by the Systems Alliance, divided by Cerberus, and lead by Commander Shepard. Yet no one can stop what is to come: the Reclamation, and the death of the galaxy.
Rated: T - English - Adventure/Sci-Fi - Chapters: 50 - Words: 379,736 - Reviews: 1535 - Favs: 1,569 - Follows: 1,967 - Updated: 7/26 - Published: 3/13/2013
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.
Rated: T - English - Mystery/Suspense - Chapters: 16 - Words: 33,722 - Reviews: 659 - Favs: 1,850 - Follows: 2,599 - Updated: 7/26 - Published: 7/2/2017 - Ashley W., Liara T'Soni, Mordin S., Shepard
Unforeseen turns of the war by Batrix2070 reviews
When everything seems to be going in the right direction Shepard learns of an old accident that forces him to seek allies in other universes.
Rated: T - English - Adventure/Sci-Fi - Chapters: 7 - Words: 38,284 - Reviews: 3 - Favs: 18 - Follows: 23 - Updated: 7/26 - Published: 1/26 - Master Chief/John-117, SPARTAN-B312/Noble Six, Admiral Hackett, Shepard
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.
Rated: M - English - Humor/Sci-Fi - Chapters: 10 - Words: 73,786 - Reviews: 91 - Favs: 82 - Follows: 93 - Updated: 7/23 - Published: 9/21/2016 - OC
Just Built Different by Pokeya reviews
Max Barrett, the child prodigy, is the single smartest man that humanity has ever or will ever produce. Regarded as both the greatest mind and as a naturally born supersoldier Max is guaranteed a life of luxury. Unfortunately his good nature has landed him in an unusual situation, he finds himself in a Halo/Mass Effect crossover universe. (Warning: has m/m and m/f xenophilia)
Rated: M - English - Humor/Sci-Fi - Chapters: 4 - Words: 33,936 - Reviews: 50 - Favs: 123 - Follows: 149 - Updated: 7/22 - Published: 12/21/2020
Remnants by General Rage reviews
From Halo's ashes, a mismatched Alliance is born. UNSC soldiers now serve alongside both Batarian deserters and shifty Jackal Space Pirates. Now Shepard and Master Chief have to keep these strange bedfellows from killing one another before they can stop an emergent new threat to the galaxy. The Next Swashbuckling Chapter of the Wormhole Chronicles.
Rated: M - English - Adventure/Sci-Fi - Chapters: 33 - Words: 729,239 - Reviews: 697 - Favs: 398 - Follows: 442 - Updated: 7/21 - Published: 4/22/2016 - Master Chief/John-117, Cortana, Tali'Zorah, Shepard
Enduring the Flames of War by Masterdude21 reviews
A joint Asari-Turian operation salvaged a "package" from a derelict wreckage in the Terminus Systems, whereupon they release a force of war beyond their reckoning. Hoping to avoid another war, Commander Shepard recruits the "package" into her team. A simple act of kindness, unwittingly paving the way for a clash unlike the galaxy has ever seen. Fate directs the flames of war.
Rated: M - English - Sci-Fi/Horror - Chapters: 40 - Words: 568,047 - Reviews: 2047 - Favs: 3,156 - Follows: 3,926 - Updated: 7/18 - Published: 11/30/2015 - Master Chief/John-117, OC, Shepard
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.
Rated: T - English - Sci-Fi/Adventure - Chapters: 35 - Words: 608,454 - Reviews: 937 - Favs: 1,310 - Follows: 1,632 - Updated: 7/16 - Published: 6/8/2018 - SPARTAN-B312/Noble Six, Rookie
Salvation (ENG) by Z0n3theDaMn3d reviews
The knowledge of sin is the beginning of salvation. More than 40 years after the end of the war against the Covenant, a new storm is brewing on the edge of the human empire. Will the colonies of the Linwood Sector be able to withstand this new threat or will they burn like Harvest once did?
Rated: M - English - Sci-Fi/Adventure - Chapters: 4 - Words: 31,498 - Reviews: 31 - Favs: 128 - Follows: 210 - Updated: 7/15 - Published: 10/8/2020 - T. Hood, Shepard, Councilor Tevos, Benezia
Noble Effect by LoneSpartan52 reviews
Noble Six was alone after the death of Emile. The Pillar of Autumn had left Reach, leaving the lone Spartan behind. But what if instead of dying on Reach, fighting to his last breath, Six survived? What if he escaped Reach and headed for Earth, only to end up in another galaxy, in another war? Will he agree to fight the reapers alongside aliens? Find out in Noble Effect
Rated: T - English - Sci-Fi - Chapters: 14 - Words: 51,545 - Reviews: 105 - Favs: 240 - Follows: 330 - Updated: 7/10 - Published: 7/3/2020 - SPARTAN-B312/Noble Six, Garrus V., Shepard, Javik
Audax Novus by A-01 reviews
A bold new world - A strange new reality - Fresh trials, tribulations, allies, and enemies. John fell through the portal from the Mantles Approach, but his luck works in mysterious ways. Now stranded in an alternate reality, how will he strive forward? The galaxy takes a sharp turn from the world we know, and the Reaper threat looms just as large, but no longer so uncontested.
Rated: M - English - Adventure/Romance - Chapters: 20 - Words: 508,709 - Reviews: 639 - Favs: 1,176 - Follows: 1,529 - Updated: 7/8 - Published: 9/4/2020 - [Master Chief/John-117, Miranda L.] [Shepard, Tali'Zorah]
War to war by Sovereign's half brother Slugg reviews
When Comander Keyes chased the Prophet of regret through the Slipspace portal with Master Chief, an anomaly occurred that threw the UNSC In Amber Clad into the Mass effect universe just before the reaper invasion
Rated: M - English - Sci-Fi/Adventure - Chapters: 4 - Words: 13,908 - Reviews: 44 - Favs: 45 - Follows: 88 - Updated: 7/7 - Published: 7/4 - Shepard, Master Chief/John-117, Cortana, Liara T'Soni
An Evolved Halo Effect by FallenDispair reviews
A crossover of Mass Effect and Halo. I'm combining my two stories An Iron Effect and Halo Evolved. The Forerunners were masters of Mass Effect technology 100,000 years before being destroyed by the Reapers. In an effort to defeat the Reaper the Forerunners created new technology not dependent on element zero. Reseeding the Halo species with technology/resources. Better sum inside.
Rated: M - English - Fantasy/Adventure - Chapters: 1 - Words: 21,112 - Reviews: 8 - Favs: 68 - Follows: 94 - Published: 7/7
Daily war with monster girls by Masterdude21 reviews
With the help of the highly-motivated extra-species in the military, mankind holds their own against the brutal onslaught of the Covenant. In their haste to close the gap in space warfare, ONI stumbles upon Relay 314. Even as new enemies arise, the galaxy constantly thwarts Cortana's schemes to build the Master Chief the ultimate harem. Halo/Mass Effect/Monster Musume crossover.
Rated: M - English - Humor/Romance - Chapters: 25 - Words: 333,451 - Reviews: 976 - Favs: 1,776 - Follows: 2,043 - Updated: 7/6 - Published: 9/20/2016 - Master Chief/John-117, Cortana, Shepard
The Lion,The Wolf, and The Bear by 27grey reviews
Jane Shepard has seen it all. God Machines, pirate onslaughts, the under belly of the citadel, Prothean city worlds. dead races reborn on ice world, looked down the barrel of a Krogan shotgun determined to save his people but how will she deal when she meets men that have seen things that only exist in her nightmares.
Rated: T - English - Chapters: 8 - Words: 29,047 - Reviews: 26 - Favs: 99 - Follows: 159 - Updated: 7/3 - Published: 12/15/2020 - Garrus V., Tali'Zorah, Shepard
The sacred path by Lighting wolf knight
To meet a being such as her? He did not understand. But their path? They walked it together.
Rated: T - English - Romance/Adventure - Chapters: 1 - Words: 803 - Favs: 6 - Follows: 10 - Published: 7/2 - OC, Atriox, Daro'Xen
An Old Machine's New Home by Edgeoftoday reviews
A Reaper is launched from it's home galaxy during one of their many cycles, and spends countless years floating through the empty void of space. It's unintended destination results in the nearly destroyed machine unknowingly put in the middle of a galactic war between a coalition of religeous zealots and an ambitious race expanding over the stars. Picks up at the start of Halo: CE.
Rated: T - English - Sci-Fi/Adventure - Chapters: 5 - Words: 24,593 - Reviews: 61 - Favs: 195 - Follows: 285 - Updated: 6/30 - Published: 8/22/2020 - Master Chief/John-117, Arbiter, J. Keyes, Cortana
Mass Effect: Galaxy at war by palik reviews
A Citadel Exploration fleet filled with people the council didnt want around discovers something that will change the face of Citadel Space forever. The council will experience a crash course in the fight for survival
Rated: M - English - Sci-Fi - Chapters: 17 - Words: 63,101 - Reviews: 325 - Favs: 753 - Follows: 1,109 - Updated: 6/29 - Published: 6/18/2020
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