Halo and Mass Effect Crossovers
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Mass Effect: Contact by FuzyDr4G0NZ reviews
In 2560, just years after the end of hostilities between the Earth based UNSC and the New Colonial Alliance, the Industrial colony of Falkland is slowly being turned into a Fortress as a defense against the perceived Colonial threat. But within months of his transfer to the colony, Lance Corporal David Campbell will find out first hand whether or not the fortress will hold.
Rated: T - English - Adventure/Sci-Fi - Chapters: 18 - Words: 60,226 - Reviews: 210 - Favs: 254 - Follows: 353 - Updated: 2/3 - Published: 5/8/2014 - OC
The Last Spartan (Or Rather, An Idea Based On The Concept Thereof) by J.S.Person1 reviews
What happens when a fanfic inspires a fanfic (also Halo 4 and 5 can bite me!)
Rated: T - English - Chapters: 1 - Words: 415 - Reviews: 3 - Published: 1/31 - Complete
The Halo Effect by Agentweapon-Proelium Tempus reviews
The UNSC dispatches a small task force to investigate an artefact with origins not of the Orion Arm. The Citadel Races, including the Systems Alliance, are in for an eye opener when two new players in galactic prowess are not only technologically superior but also not bound by the Element Zero and its constraints. Rated T for reasons. AU in both Halo and ME events.
Rated: T - English - Adventure/Humor - Chapters: 10 - Words: 37,139 - Reviews: 214 - Favs: 625 - Follows: 833 - Updated: 1/29 - Published: 8/6/2015 - Master Chief/John-117, OC, Shepard (F)
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: 12 - Words: 76,805 - Reviews: 307 - Favs: 488 - Follows: 706 - Updated: 1/29 - Published: 11/26/2013 - Master Chief/John-117, Cortana, Shepard (F)
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 this galaxy forever. Post Halo 4, Pre ME3. AU
Rated: T - English - Sci-Fi/Adventure - Chapters: 25 - Words: 246,810 - Reviews: 2078 - Favs: 2,225 - Follows: 2,769 - Updated: 1/28 - Published: 10/9/2013 - Master Chief/John-117, T. Lasky, Admiral Hackett, Shepard (M)
Exodus of the Damned by Codename-SURGEON reviews
We won. We defeated the Reapers. Yet they still they destroyed the galaxy. Now, it's up to a select few to blaze a path through uncharted territory, and lead the survivors to a new home.
Rated: T - English - Sci-Fi/Adventure - Chapters: 6 - Words: 19,918 - Reviews: 26 - Favs: 64 - Follows: 106 - Updated: 1/26 - Published: 1/17
A Feeling of Importance by LebendenToten reviews
Well, after reading quite a bit of fanfiction I decided that maybe it was finally time for me to try and crank out one of my own. This is going to be a self insert story of sorts that starts in the Halo universe then eventually transitions to Mass Effect. This is my first Fanfic so be nice :P and constructive criticism/suggestions welcome! Rated T mainly for language.(changed to T)
Rated: T - English - Adventure/Friendship - Chapters: 21 - Words: 38,198 - Reviews: 154 - Favs: 177 - Follows: 236 - Updated: 1/25 - Published: 11/6/2014 - Master Chief/John-117, C. Halsey, OC, Shepard (F)
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: 17 - Words: 160,170 - Reviews: 589 - Favs: 1,027 - Follows: 1,297 - Updated: 1/22 - Published: 3/27/2011 - Master Chief/John-117, Tali'Zorah, 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: 4 - Words: 9,641 - Reviews: 5 - Favs: 13 - Follows: 30 - Updated: 1/21 - Published: 12/10/2015 - Gravemind, Shepard (F), Harbinger
HaloMass Effect: Ruptured Universe (Cancelled) by JediSpectre177 reviews
Multiple crossovers AvP,RvB, JC's Avatar, Star wars, Halo, Mass Effect and more. Authors 2nd apology and Cancellation on chapter 14
Rated: T - English - Sci-Fi/Adventure - Chapters: 15 - Words: 160,561 - Reviews: 660 - Favs: 424 - Follows: 442 - Updated: 1/20 - Published: 4/16/2012 - Master Chief/John-117
Mass Effect: The New Journey by Arashi the Solar Phoenix reviews
During a Joint Deployment, the UNSC Infinity and Her Sangheili allies are suddenly thrown into a new Galaxy, and end up near Charon before the Systems Alliance discovers the Charon Relay. Alliances are forged and how will the galaxy react to an aggressive humanity that not only doesn't use Mass Effect technology, but will not let anyone stand in their way of expansion? AU PreME1
Rated: T - English - Sci-Fi/Adventure - Chapters: 16 - Words: 159,600 - Reviews: 1109 - Favs: 1,663 - Follows: 2,046 - Updated: 1/19 - Published: 1/26/2014
The Fighting Spirit by smart grid reviews
Spartans never die, they say. When Jorge gave his life to save his home planet of Reach, he never imagined that he would survive. But now he finds himself neck deep in the troubles of another universe; he will do what he has been trained to do, what all Spartans do best: fight.
Rated: T - English - Adventure - Chapters: 39 - Words: 176,016 - Reviews: 695 - Favs: 867 - Follows: 1,059 - Updated: 1/16 - Published: 12/1/2011 - Jorge-052/Noble Five, Shepard (F) - Complete
The Sum is Greater than its Parts by Maersikai reviews
Having long since combined forces, a fleet of the Humans and Covenants finest are torn from the universe they know to be thrown in to a strange and desolate reality. They will strive to uphold the Mantle against the Mass Effect's most Ancient Enemy. Will they break the cycle?
Rated: T - English - Sci-Fi - Chapters: 17 - Words: 163,099 - Reviews: 260 - Favs: 700 - Follows: 872 - Updated: 1/10 - Published: 3/2/2015 - T. Hood, Cortana, Shepard (F)
The Age of Extinction (A New Battleground Part 2) by AlphaGuardian reviews
The Collectors have been defeated, but now the galaxy faces extinction from the Reapers. Their last hope lies in the brave men and women of the SSV Normandy and their Spartan ally. But even they will not be able to save everyone, and everyone has their breaking point. But the fate of the galaxy rests on their shoulders, and failure means extinction.
Rated: T - English - Sci-Fi/Adventure - Chapters: 7 - Words: 25,770 - Reviews: 8 - Favs: 49 - Follows: 55 - Updated: 1/9 - Published: 12/26/2014 - Cortana, SPARTAN-B312/Noble Six, Shepard (M)
The Noble Adventure by DukeLetoAtreides reviews
This story is about Noble Six in Shepard's crew during Mass Effect 2. This is my first fic, please be nice.
Rated: T - English - Adventure - Chapters: 3 - Words: 1,596 - Reviews: 11 - Favs: 9 - Follows: 8 - Updated: 1/8 - Published: 12/20/2015 - SPARTAN-B312/Noble Six, Shepard (M)
Critical Effect by Baen Ikonoka reviews
A HALO/Mass Effect cross over I came up with a few years ago and uploaded on my old account so just in case you guys think this is a stolen work please note: I am remaking it without my more... rubbish earlier works clogging my list.
Rated: K - English - Adventure/Sci-Fi - Chapters: 3 - Words: 16,568 - Reviews: 3 - Favs: 8 - Follows: 8 - Updated: 1/6 - Published: 1/3 - S. Palmer, U. Wrex, Legion, Aria T'Loak
Halo-Mass Effect: Altered-Destiny by Azores reviews
In 2531 during the early years of the Great War, UNSC Spirit of Fire went missing and was declared lost with all hands. But what if the Spirit wasn't lost and adrift in space. What if it was sent to another Galaxy, before the Humans of this Galaxy hadn't discovered a certain set of ruins yet. How will Humanity's future change? How will the Galaxy be changed? Start 2100 AD. Book 1
Rated: T - English - Sci-Fi - Chapters: 11 - Words: 93,698 - Reviews: 285 - Favs: 560 - Follows: 729 - Updated: 1/6 - Published: 1/25/2015 - J. Cutter, P. Cole, U. Wrex, Aria T'Loak
The Incident at Relay 314: Database by NAFB reviews
I decided to move the timeline and technology database into their own section, so readers who just want the story can have that now.
Rated: T - English - Sci-Fi - Chapters: 3 - Words: 5,811 - Reviews: 7 - Favs: 15 - Follows: 13 - Updated: 1/5 - Published: 1/1
Unflinching Resolve by gwb99 reviews
The Human/Covenant was a long one, billions died on both sides yet Humanity always stood tall, fought back and kept going even when it seemed impossible. For the UNSC battlegroup Lima they will need to do this once again when they are thrown into another universe entirely and for one SPARTAN super soldier she'll need to overcome her hate and learn to trust those she despises.
Rated: T - English - Adventure/Sci-Fi - Chapters: 4 - Words: 17,224 - Reviews: 26 - Favs: 71 - Follows: 118 - Updated: 1/4 - Published: 9/4/2015 - Kurt-051, OC, Admiral Hackett, OC
Riddles by Spartan'n'Spectre
What do Jack and the Gravemind have in common? We don't know either.
Rated: T - English - Parody/Humor - Chapters: 1 - Words: 696 - Favs: 4 - Follows: 1 - Published: 1/3
Death to the xeno by NAFB reviews
It's all a matter of perspective...
Rated: T - English - Sci-Fi - Chapters: 2 - Words: 2,474 - Reviews: 14 - Favs: 4 - Follows: 7 - Updated: 1/2 - Published: 12/29/2015 - Complete
The incident at Relay 314 by NAFB reviews
During a routine patrol, a Turian flottila encounters a new race activating Relay 314. The ensuing events will change humanity, council space and the individuals involved.
Rated: T - English - Sci-Fi - Chapters: 1 - Words: 1,653 - Reviews: 66 - Favs: 146 - Follows: 239 - Updated: 1/1 - Published: 4/19/2014
Halo Mass Effect: The New Dawn by OverLord3475 reviews
Humanity has joined forces with their former enemies to form the OSA, they have formed new alliances that have made them stronger, but what awaits them beyond the relay are they ready for a new chapter? inspired by Halo a new age and HaloMasssEffect: ruptured universe. this is a multicrossover (other franchises).
Rated: T - English - Sci-Fi - Chapters: 5 - Words: 35,850 - Reviews: 83 - Favs: 223 - Follows: 293 - Updated: 12/31/2015 - Published: 7/1/2014 - Master Chief/John-117, Shepard (M)
The Flood by Spartan'n'Spectre reviews
The Mass Effect crew decides to join the U.N.S.C during a routine extermination mission.
Rated: K+ - English - Parody/Humor - Chapters: 1 - Words: 1,825 - Reviews: 3 - Favs: 3 - Follows: 5 - Published: 12/26/2015
Pilot by Commander Thor reviews
While the Infinty preps for a joint mission with Covenant allies, an ancient plan is set into motion to herald in a new age of war. NB: This series will include more than just the indicated xovers. There will be more leading into a final story.
Rated: K - English - Sci-Fi/Adventure - Chapters: 3 - Words: 16,185 - Reviews: 8 - Favs: 16 - Follows: 22 - Updated: 12/24/2015 - Published: 7/9/2013 - S. Palmer, Aria T'Loak, Garrus V., Harbinger
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