Halo and Mass Effect Crossovers
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The Spartan Crew Member by Daisy Rhine reviews
Commander Shepard 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 suped up human was not one of them. I don't own Halo or Mass Effect 343industries and BioWare do.
Rated: T - English - Friendship/Adventure - Chapters: 22 - Words: 49,175 - Reviews: 141 - Favs: 143 - Follows: 206 - Updated: 1/16 - Published: 8/14/2017 - Master Chief/John-117, Garrus V., Tali'Zorah, Shepard (M)
Element Halo by Iron Warriors reviews
When shots are fired between the U.N.S.C. and a new unidentified alien faction. Who, will survive? Find out for yourself here. This story is denying Halo 5's existence because we all know why. Rated M when the Reaper war comes full circle. [UNDER REVISION FOR CHAPTER 1 & 2]
Rated: T - English - Sci-Fi - Chapters: 2 - Words: 5,029 - Reviews: 18 - Favs: 69 - Follows: 113 - Updated: 1/12 - Published: 12/11/2017
The Wreck by Gabenator5 reviews
After the Normandy's destruction, Tali goes out to traverse the lesser explored places in the galaxy in search of rare materials for the Migrant Fleet, while on her adventures she finds something that shouldn't belong, she finds a Wreck, A wreck that predates the Protheans.
Rated: T - English - Fantasy/Sci-Fi - Chapters: 1 - Words: 1,020 - Reviews: 18 - Favs: 54 - Follows: 105 - Published: 1/7 - Tali'Zorah
The Reclamation has already begun by Fade Maybe reviews
The Master Chief has defeated the Didact. Across the galaxy, the Reaper War wages on as the Citadel races struggle to survive while Commander Shepard and the crew of the SSV Normandy fights on. But a deeply divided UNSC discovers a Mass Relay that will change the course of the war and galactic history forever. The Reclamation has already begun. And we are hopeless to stop it.
Rated: T - English - Adventure/Sci-Fi - Chapters: 23 - Words: 244,452 - Reviews: 738 - Favs: 810 - Follows: 1,058 - Updated: 1/6 - Published: 3/13/2013
The Final Frontier : The Last Cycle by WisdomOfCelestials reviews
AU. Halo/Mass Effect Crossover, Combined Universes. Humanity has not met the council. Considerably buffed Humanity. Buffed Reapers. Several OCs
Rated: T - English - Sci-Fi/Adventure - Chapters: 1 - Words: 7,500 - Reviews: 9 - Favs: 42 - Follows: 67 - Published: 1/1
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.
Rated: T - English - Sci-Fi/Adventure - Chapters: 45 - Words: 141,397 - Reviews: 138 - Favs: 69 - Follows: 90 - Updated: 12/29/2017 - Published: 8/29/2012 - Arbiter, Prophet of Truth, Shepard (M), OC
A sacred oath by Imperator45 reviews
"I swear to protect Earth and her colonies."That is an oath made by 75 children,75 children that were trained to serve Earth by becoming the best soldiers know in the history,and even throught that Master chief,AKA Spartan 117 is not in the same Universe anymore,he intend to fulfill this oath that he made so many years ago...No matter the price for it.
Rated: T - English - Adventure/Sci-Fi - Chapters: 3 - Words: 7,379 - Reviews: 29 - Favs: 108 - Follows: 196 - Updated: 12/15/2017 - Published: 11/27/2017 - Master Chief/John-117, Cortana, Shepard (F)
Los Spartan nunca mueren by TragicAsesino56
Noble 6 no murió se fue a otro lugar muy diferente al suyo, ahora deberá salvar a la galaxia con su nuevo equipo (Advertencia: este fic tendrá Lemon en algunos capítulos)
Rated: T - Spanish - Adventure/Romance - Chapters: 1 - Words: 2,675 - Favs: 1 - Follows: 1 - Published: 12/15/2017 - SPARTAN-B312/Noble Six, Ashley W., Kaidan A., Saren A.
Effects of a Titan by greeneman42 reviews
A small salvage ship comes across an interesting find while searching. Set before Halo 4 and before ME 2
Rated: T - English - Adventure/Sci-Fi - Chapters: 25 - Words: 168,585 - Reviews: 687 - Favs: 1,195 - Follows: 1,585 - Updated: 12/10/2017 - Published: 11/26/2013 - Master Chief/John-117, Cortana, Shepard (F)
The abomination rises by James1007 reviews
The Reapers are dead, Cerberus is defeated and a new peace rains over the galaxy but Shepard know's this is not the end. Before he planned to destroy the Reapers the star boy spoke to him about an impending doom that will fall upon the galaxy and will stop at nothing until all sentient life will be consumed by the endless horde that will feast upon their bones.
Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 4,059 - Reviews: 4 - Favs: 5 - Follows: 6 - Updated: 12/3/2017 - Published: 11/24/2017 - Gravemind, Librarian, Liara T'Soni, Shepard (M)
Accounts of the Flood conflicts by hunter 139 reviews
A 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: 25 - Words: 55,222 - Reviews: 119 - Favs: 80 - Follows: 98 - Updated: 12/3/2017 - Published: 1/15/2015 - Gravemind
Soft as Thunder by silencewillfall009 reviews
Strength. Discipline. Honor. These are the pillars of Turian Society. And after meeting a race faced with extinction, they will stand by these pillars. No matter what the Asari say.
Rated: T - English - Sci-Fi/Fantasy - Chapters: 2 - Words: 3,582 - Reviews: 62 - Favs: 212 - Follows: 379 - Updated: 11/30/2017 - Published: 11/27/2017
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: 12 - Words: 22,121 - Reviews: 8 - Favs: 13 - Follows: 9 - Updated: 11/26/2017 - Published: 4/21/2015
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: 6 - Words: 11,638 - Reviews: 290 - Favs: 835 - Follows: 1,241 - Updated: 11/13/2017 - Published: 7/2/2017 - Ashley W., Liara T'Soni, Mordin S., Shepard (M)
Covenant Effect by Benthatguy reviews
A Turian patrol makes hostile first contact with the covenant during the height of the human covenant war. Will the council be able to stand up to the might of the covenant war machine? Will the UNSC be able to trust another group of aliens so similar to their hated foe. How will the specters react when they learn their not the best in the galaxy anymore.
Rated: T - English - Chapters: 1 - Words: 3,259 - Reviews: 21 - Favs: 92 - Follows: 155 - Published: 11/12/2017
Peace in Our Time by silencewillfall009 reviews
The Forerunner/Human union of the RIS rises to challenge the Citadel Council. Another superpower has risen. And they will claim their rightful place in the galaxy. Constructive criticism welcome.
Rated: T - English - Sci-Fi/Adventure - Chapters: 6 - Words: 6,881 - Reviews: 92 - Favs: 191 - Follows: 298 - Updated: 11/11/2017 - Published: 3/23/2017
The Infinity Effect by creamofwheat2311 reviews
After discovering a Precursor artifact, the UNSC Infinity and the Sangheili Shadow of Intent are transported to a universe unlike anything they have ever seen, and forced into a war against a foe they never could have imagined: the Reapers. Alliances are founded, friendships are formed, and decisions are made that will change both galaxies forever.
Rated: T - English - Sci-Fi/Adventure - Chapters: 34 - Words: 316,348 - Reviews: 2655 - Favs: 3,104 - Follows: 3,755 - Updated: 11/11/2017 - Published: 10/9/2013 - Master Chief/John-117, T. Lasky, Admiral Hackett, Shepard (M)
Parasites Abound by Faithless wanderer reviews
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
Rated: K - English - Sci-Fi/Adventure - Chapters: 7 - Words: 28,258 - Reviews: 9 - Favs: 34 - Follows: 44 - Updated: 11/8/2017 - Published: 8/23/2017
The Spartan Effect by Gatekeeper333 reviews
Everyone's favorite Spartan is looking for a new purpose, lucky for him, the Commander his happy to oblige.
Rated: T - English - Chapters: 33 - Words: 328,276 - Reviews: 1172 - Favs: 1,748 - Follows: 2,208 - Updated: 11/6/2017 - Published: 3/27/2011 - Master Chief/John-117, Tali'Zorah, Miranda L., Shepard (M)
The Citadel and Forerunner Tech by CapitalClassShip reviews
A Series one-shots ideas where we laugh at the misfortune of the Citadel Council and its associates when trying to use Forerunner Technology not counting that is possible incompatibilities, Power Consumption and other dilemmas we neglect when it comes down in other stories with the Mass Effect Technology. This story will be updated as Ideas start Coming Everyone is Welcome Aboard!
Rated: T - English - Parody/Sci-Fi - Chapters: 1 - Words: 991 - Reviews: 15 - Favs: 40 - Follows: 61 - Published: 10/18/2017 - Complete
Collectors at Dawn by jacksld850 reviews
The Master Chief and Cortana find themselves in an alternate reality and in contact with a mysterious black ops organization. Events soon spiral out of their control as they're forced into another battle for another humanity's survival.
Rated: T - English - Adventure/Sci-Fi - Chapters: 12 - Words: 59,153 - Reviews: 53 - Favs: 258 - Follows: 385 - Updated: 10/12/2017 - Published: 1/20/2017 - Master Chief/John-117, Cortana, Miranda L., Shepard (M)
Shadow of N7 by jmichaelm99 reviews
During the events of Mass Effect 2, Commander Shepard discovers a SPARTAN super soldier stranded in the far reaches of the galaxy. Befriending this new ally, she embarks on her mission to shut down the collectors. During her mission she uncovers a dark truth about the reapers and the galaxies of the universe.
Rated: T - English - Sci-Fi - Chapters: 10 - Words: 17,308 - Reviews: 17 - Favs: 52 - Follows: 95 - Updated: 10/3/2017 - Published: 12/10/2015 - Gravemind, Shepard (F), Harbinger
EFFCT UNSC by jefferson121909 reviews
Años 2552 después de la guerra contra la Insurrección se descubrió un objeto alienígena ene sistema Shanxi que cambiaria la forma en que la humanidad vería en universo
Rated: T - Spanish - Sci-Fi/Adventure - Chapters: 2 - Words: 3,542 - Reviews: 4 - Favs: 3 - Follows: 5 - Updated: 10/3/2017 - Published: 10/1/2017 - [Tali'Zorah, Shepard (M)] Master Chief/John-117, Councilor Tevos
Lucky Number Six by jinxedragon reviews
What happens when you get a second chance at life? Jace, Noble six, isn't completely sure but it's something he can't pass up the chance at.
Rated: T - English - Chapters: 2 - Words: 1,861 - Reviews: 3 - Favs: 15 - Follows: 22 - Published: 9/27/2017 - SPARTAN-B312/Noble Six, Scott R.
Changing Universes by GamerDroid56 reviews
As a Spartan, it was my duty to protect Humanity, whatever the cost. Now, the stakes have been raised as I no longer have to protect just Humanity, but the entire galaxy and all of its inhabitants. At the side of the First Human Specter of this new Galaxy, I will succeed in defending the galaxy, even if it results in my death... Takes place during ME2
Rated: T - English - Sci-Fi/Friendship - Chapters: 9 - Words: 10,737 - Reviews: 14 - Favs: 47 - Follows: 83 - Updated: 8/30/2017 - Published: 10/7/2016 - OC, Shepard (F), Illusive Man, Miranda L.
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