Halo and Mass Effect Crossovers
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Operation Phoenix & Raven by Ordo Warrior reviews
Continuing from Best of Spartans and Spectres. Commander Shepard has been captured and Noble Six turns to the one group that can help save her, but will that help come at too great of a cost?
Rated: M - English - Chapters: 53 - Words: 175,250 - Reviews: 91 - Favs: 178 - Follows: 233 - Updated: 20h - Published: 10/21/2014 - SPARTAN-B312/Noble Six, J. Garson - Complete
Mass Emile by Ranschaj reviews
Emile survives the two zealots at the end of Reach, and after surviving Covenant onslaught, finds himself in the ME universe. Kick-ass picture is thanks to freejimmy on deviantart
Rated: M - English - Adventure/Sci-Fi - Chapters: 6 - Words: 38,224 - Reviews: 733 - Favs: 766 - Follows: 860 - Updated: 20h - Published: 12/11/2012 - Emile-A239/Noble Four
Immortal Galaxies by Lighting wolf knight reviews
An escape from an overrun galaxy lands them in another galaxy? What does being the biggest fish in the water gain you in a world without heavy hitters? Rated T for violence, death, and profanity.
Rated: T - English - Romance/Adventure - Chapters: 1 - Words: 823 - Reviews: 2 - Favs: 19 - Follows: 26 - Published: 11/11 - [OC, Vetra N.] T. Hood
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: 52 - Words: 396,315 - Reviews: 1557 - Favs: 1,627 - Follows: 2,022 - Updated: 11/9 - Published: 3/13/2013
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: 26 - Words: 351,644 - Reviews: 1006 - Favs: 1,836 - Follows: 2,103 - Updated: 11/9 - Published: 9/20/2016 - Master Chief/John-117, Cortana, Shepard
The Truth About What It Means To Be Alive by FreedomOfThinking reviews
He's the last of his kind, and he's way out of his time. Waking up to a universe under the control of a despotic Artificial Intelligence was the last thing he expected. But the good news for him is that our favorite red-haired commander is all-inclusive and totally supportive of anyone, human or alien. Even if he's kinda responsible for the whole Reaper thing... whoops.
Rated: T - English - Humor/Adventure - Chapters: 2 - Words: 16,175 - Reviews: 26 - Favs: 124 - Follows: 177 - Updated: 11/3 - Published: 4/10/2019 - Librarian, Didact, OC, Shepard
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: 5 - Words: 40,517 - Reviews: 41 - Favs: 183 - Follows: 287 - Updated: 10/31 - Published: 10/8/2020 - T. Hood, Shepard, Councilor Tevos, Benezia
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: 37 - Words: 653,755 - Reviews: 998 - Favs: 1,373 - Follows: 1,699 - Updated: 10/30 - Published: 6/8/2018 - SPARTAN-B312/Noble Six, Rookie
Spectre by blackshamrock333 reviews
Ce qui ne devait être qu'une simple mission de récupération, pour la commandante Shepard de l'UNSC, a rapidement tourné au cauchemar. Désormais, l'humanité et la citadelle sont au bord de la guerre, inconscient qu'un danger bien plus grand les guette. Deux Shepard ne seront pas de trop pour cette mission.
Rated: T - French - Adventure - Chapters: 5 - Words: 15,246 - Reviews: 7 - Favs: 4 - Follows: 8 - Updated: 10/24 - Published: 9/12
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, a single good deed has landed him in an unusual situation: he finds himself in a Halo/Mass Effect crossover universe.
Rated: M - English - Humor/Sci-Fi - Chapters: 5 - Words: 35,287 - Reviews: 53 - Favs: 151 - Follows: 182 - Updated: 10/20 - Published: 12/21/2020
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: 21 - Words: 68,716 - Reviews: 384 - Favs: 849 - Follows: 1,264 - Updated: 10/16 - Published: 6/18/2020
For Earth and All Her Colonies by GADPELLAEON reviews
Post Human-Covenant War AU. After the Great War, all the UNSC wants to do is rebuild and live in the peace. A peace that so many died for. What happens when they learn that no matter what, war will always find them. Chapters Updated - Chapter 11 uploaded (07/08/2019) Any criticism and/or tips welcome.
Rated: T - English - Sci-Fi - Chapters: 13 - Words: 80,854 - Reviews: 487 - Favs: 1,415 - Follows: 1,995 - Updated: 10/14 - Published: 12/27/2018 - Master Chief/John-117, Arbiter, J. Garson, Councilor Tevos
Faction Death Battle by Konradoziom reviews
Death Battle, but between factions. Factions may not necessarily come from the HALO or MassEffect universes. You can ask fort factions you want to fight with each other in the comments. I found something like that on YouTube and decided to do it myself, on fanfiction, although on YouTube it was called otherwise, 'Faction Compare', I think.
Rated: K+ - English - Fantasy/Sci-Fi - Chapters: 3 - Words: 5,100 - Reviews: 14 - Favs: 10 - Follows: 8 - Updated: 10/13 - Published: 4/19
Accounts of the Flood conflicts by hunter 139 reviews
A multicrossover series of one-shots depicting several franchises and their encounters with the Flood. I do not own Halo or any other franchises depicted in these stories.
Rated: T - English - Horror/Sci-Fi - Chapters: 39 - Words: 98,263 - Reviews: 199 - Favs: 155 - Follows: 170 - Updated: 10/9 - Published: 1/15/2015 - Gravemind
The Adventures of the Lucen: The VykurCorp Conspiracy by General Rage reviews
Liara T'Soni continued her mission to protect the Galaxy while Commander Shepard is in another dimension. She must stop the Covenant and the allies they've gathered from wreaking havoc in a Galaxy without it's greatest hero. While she's had some success, there's a gathering storm on the horizon and one of her crew of misfits will be forced to confront her past before it clears.
Rated: M - English - Sci-Fi/Adventure - Chapters: 13 - Words: 214,973 - Reviews: 155 - Favs: 120 - Follows: 123 - Updated: 10/8 - Published: 6/26/2016 - OC, Liara T'Soni, U. Wrex
Mass Effect: Wayward Souls (rewrite pending) by ChroniclerofChaos07 reviews
No one knew what would really happen when the slipspace bomb detonates. All they know is that whatever gets caught in it would be sent to "oblivion". No one expected what would happen when you mess with the 11 dimensions of splipspace. Now Noble Six faces a new galaxy along side two other "Six's", three Jorge's, a surviving team of ODSTs, and the sole survivor of The Savannah.
Rated: T - English - Sci-Fi - Chapters: 3 - Words: 19,484 - Reviews: 43 - Favs: 186 - Follows: 278 - Updated: 10/4 - Published: 3/17 - Jorge-052/Noble Five, SPARTAN-B312/Noble Six, Shepard
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: 27 - Words: 60,463 - Reviews: 24 - Favs: 36 - Follows: 32 - Updated: 9/25 - Published: 4/21/2015
Reckoning of the Reclaimers (v2) by metts101 reviews
After the Great War Humanity was a different creature. Their brush with extinction left them cold and vengeful, and so they sought revenge for the transgressions of the Covenant species. With their eradication Humanity, driven by xenophobia, took their position as the unrivalled power in the galaxy. However, will a xenophilic alien federation, in a new galaxy, change their outlook?
Rated: T - English - Sci-Fi - Chapters: 1 - Words: 11,625 - Reviews: 17 - Favs: 139 - Follows: 203 - Published: 9/24
Reckoning of the Reclaimers (Being Rewritten) by metts101 reviews
The Great War turned Humanity into something ugly. Their species' brush with extinction left a bitter taste in their mouths and they sought to rectify that the only way they knew how. Revenge. With the the subjugation of the Former Covenant species Humanity vowed never to fall to the alien again, but will an Alliance of Alien species change their outlook on the galaxy?
Rated: T - English - Sci-Fi - Chapters: 6 - Words: 41,721 - Reviews: 74 - Favs: 276 - Follows: 370 - Updated: 9/22 - Published: 11/14/2020
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: 12 - Words: 122,661 - Reviews: 31 - Favs: 136 - Follows: 189 - Updated: 9/21 - Published: 6/29 - [SPARTAN-B312/Noble Six, Oriana L.] [Shepard, Miranda L.]
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: 22 - Words: 571,661 - Reviews: 693 - Favs: 1,288 - Follows: 1,666 - Updated: 9/20 - Published: 9/4/2020 - [Master Chief/John-117, Miranda L.] [Shepard, Tali'Zorah]
Ascendant by evevee reviews
A single ship can change a galaxy. The Normandy had already proven that, yet much like that vessel this new wreck was also dead. So it seemed at first at least, but just because something is dead does not mean it is forgotten.
Rated: K+ - English - Sci-Fi - Chapters: 5 - Words: 38,561 - Reviews: 197 - Favs: 520 - Follows: 613 - Updated: 9/18 - Published: 8/21 - Liara T'Soni - Complete
The Halo Effect: War and Civilization by free man writer reviews
A crossover years in the works. Civilizations rise and fall but to those that do stand, they prosper. They Expand. They reach out across the stars. But of course, such is a Universal law, War is never far behind. War is a language all civilized races speak and it is war most are familiar with. Co-written with BulletStormX. Halo/Mass Effect with a dash of Star Wars.
Rated: M - English - Sci-Fi/Adventure - Chapters: 11 - Words: 111,685 - Reviews: 280 - Favs: 575 - Follows: 756 - Updated: 9/16 - Published: 7/28/2020
Mass Effect: Trailblazer by TallYapflip reviews
Humanity, left to its own devices for centuries, comes into contact with the Citadel Council. A misunderstanding leads to hostile first contact, and the UNSC is drawn into war with the Council shortly after the Insurrection's height. The Council finds itself face-to-face with a species that has broken the shackles of Mass Effect Technology. The Era of Humanity has only just begun.
Rated: M - English - Sci-Fi/Adventure - Chapters: 14 - Words: 68,598 - Reviews: 667 - Favs: 2,275 - Follows: 3,046 - Updated: 9/14 - Published: 7/14/2017 - Master Chief/John-117, J. Keyes, Miranda L., 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: 41 - Words: 585,329 - Reviews: 2115 - Favs: 3,264 - Follows: 4,033 - Updated: 9/9 - Published: 11/30/2015 - Master Chief/John-117, OC, Shepard
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