Halo and Mass Effect Crossovers
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The Halo Effect by Agentweapon-Proelium Tempus reviews
The discovery of a massive shield world and its contents put the UNSC into high alert. More alien artefacts are uncovered here, while vastly inferior to Forerunner, Covenant and Humanity technology, they still pose a threat since no First Contact scenario ever goes according to plan. With the help of the newly established AIS, will the UNSC be able to survive this new threat?
Rated: T - English - Humor/Adventure - Chapters: 6 - Words: 28,115 - Reviews: 62 - Favs: 191 - Follows: 291 - Updated: 3h - Published: 5/5 - Master Chief/John-117, OC, Shepard (F), Admiral Hackett
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 1/3
Rated: T - English - Sci-Fi - Chapters: 10 - Words: 62,449 - Reviews: 207 - Favs: 401 - Follows: 537 - Updated: 19h - Published: 1/25 - J. Cutter, P. Cole, U. Wrex, Aria T'Loak
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: 14 - Words: 24,226 - Reviews: 72 - Favs: 67 - Follows: 113 - Updated: 22h - Published: 11/6/2014 - Master Chief/John-117, C. Halsey, OC, Shepard (F)
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 when faced with a strange set of aliens and humans facing a galactic threat.
Rated: T - English - Sci-Fi - Chapters: 14 - Words: 136,109 - Reviews: 192 - Favs: 478 - Follows: 578 - Updated: 6/28 - Published: 3/2 - T. Hood, Cortana, Shepard (F)
Critical Effect by Commander Thor
This is the new chapter of my Halo/M-Effect cross over. I have decided to scrap any writing involving other crossovers.
Rated: K - English - Sci-Fi/Mystery - Chapters: 1 - Words: 1,158 - Favs: 2 - Follows: 2 - Published: 6/28
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: 3 - Words: 11,612 - Reviews: 41 - Favs: 135 - Follows: 219 - Updated: 6/26 - Published: 11/26/2013 - Master Chief/John-117, Cortana, Shepard (F)
Hunting Ghosts by Mediam Noctem reviews
The Master Chief has gone missing. Colonies have been mysteriously attacked. Solar Systems have gone dark. Now Jameson Locke has been tasked with completing the impossible, hunting down the rogue Master Chief. But when a newly discovered artifact sends him to a different galaxy, Locke must escape a looming darkness and complete his mission. But how far must he go to do so?
Rated: T - English - Sci-Fi - Chapters: 4 - Words: 24,442 - Reviews: 30 - Favs: 59 - Follows: 92 - Updated: 6/25 - Published: 4/12 - Master Chief/John-117, T. Lasky, J. Locke, Shepard (M)
Alternate Past, Uncertain Future Mk II by Follower38 reviews
Co-written with aDarkOne History, a single event, can alter so much, let alone two. The San'Shyum are no more. The Krogan Empire stands strong. Humanity is now a giant among the stars. With three Galactic Superpowers in play, will an encounter see a new Golden Age, or an Era of War? (Chapters 1-12 being rewritten)
Rated: T - English - Adventure - Chapters: 33 - Words: 291,587 - Reviews: 683 - Favs: 532 - Follows: 666 - Updated: 6/25 - Published: 8/28/2012
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: 15 - Words: 147,354 - Reviews: 996 - Favs: 1,452 - Follows: 1,806 - Updated: 6/21 - Published: 1/26/2014
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: 14 - Words: 44,602 - Reviews: 156 - Favs: 197 - Follows: 267 - Updated: 6/21 - Published: 5/8/2014 - OC
The Power of the Grail by Metal4k reviews
The Flood and Reapers have taken world after world, and Commander Shepard and Master Chief are on the edge of their rope to find the Halo Array. As they traverse new space and realities, dark secrets will be revealed that could shatter all they know. The enemy has plans of its own, and even Heroes are hopeless to stop it. Sequel to the "Universe of All Reality"
Rated: T - English - Adventure/Sci-Fi - Chapters: 2 - Words: 13,513 - Reviews: 12 - Favs: 36 - Follows: 37 - Updated: 6/20 - Published: 5/13 - Master Chief/John-117, Arbiter, Shepard (F), U. Wrex
Mass Effect: Second Contact by Helezhelm reviews
What if Halo universe collides with Mass Effect universe! How would System Alliance among Council Citadel races react to another human race in other galaxy? We only will find out in upcoming fanfiction!
Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 4,443 - Reviews: 25 - Favs: 102 - Follows: 122 - Updated: 6/17 - Published: 4/29
Of Our Time by Korten reviews
On the day of the 100th anniversary of the conclusion of the Great War, a lone ONI agent is sent to retrieve an artifact and bring it back to the ONIRF, Trevelyan. However what lies inside is something unexpected, ancient and alien. Join ONI Agent Garret Elphick along with his mysterious companion as they solve the greatest mystery of his time. Where did the Master Chief go?
Rated: T - English - Sci-Fi/Adventure - Chapters: 8 - Words: 43,275 - Reviews: 25 - Favs: 40 - Follows: 70 - Updated: 6/10 - Published: 4/6 - Master Chief/John-117, OC, OC
Humanity at War: Earth's Last Stand by EliteOp reviews
A hero from another time wakes up in a whole new war. Except this time the commander is not the main protagonist.
Rated: T - English - Romance/Sci-Fi - Chapters: 9 - Words: 6,612 - Reviews: 9 - Favs: 11 - Follows: 13 - Updated: 6/9 - Published: 1/24
Heroes of the Stars by Kamzil118 reviews
The Arbiter and an ODST, Farseer Taldeer and Logan of the Ghost squad, and Blackburn of the 1st Recon Marines. All these people find themselves in the Mass Effect Universe with an unexpected way that brings them together. Commander Shepard will need all their help to fight the Reapers.
Rated: T - English - Sci-Fi/Adventure - Chapters: 31 - Words: 78,330 - Reviews: 131 - Favs: 80 - Follows: 87 - Updated: 6/8 - Published: 7/21/2014 - Arbiter, Rookie, Shepard (F), Tali'Zorah - Complete
Gateway Chronicles by Robert Lee reviews
Ever sense the two games Halo and Mass Effect have been out, there have been those that have written cross overs or discussed how the two universes may interact. Gateway Chronicles is my take on that very issue.
Rated: K - English - Sci-Fi - Chapters: 12 - Words: 35,574 - Reviews: 40 - Favs: 79 - Follows: 137 - Updated: 6/5 - Published: 11/14/2014
Halo The Evolution Continues by UNSpaceCommand reviews
First time Crossover. Constructive Critic welcome. Enjoy and pls Review. Chapter 25. A long lost ship is returning home but it seems fate have a decision to make a mess of things.
Rated: T - English - Sci-Fi - Chapters: 25 - Words: 53,109 - Reviews: 303 - Favs: 365 - Follows: 418 - Updated: 6/1 - Published: 9/22/2011
Precursors Effect V2 by Ny'Kle
Rewritten version of my original story, covers my take on a Halo/Mass Effect crossover, with bits of others too. Please Read and Review. (This story is AU. Don't like, don't read, but if you read, don't complain about things not being the same as official 343i or Bioware canon and lore.)
Rated: T - English - Chapters: 1 - Words: 2,686 - Favs: 14 - Follows: 18 - Published: 5/30
Heart of the Storm by Aleixo reviews
Reach has fallen and Noble Six is all that remains on the planet. In a valiant last stand Six mysteriously finds himself in the world of another. How will he come to terms with it? What will he do? Can he overcome his loss and find peace at last? Six pairing is yet to be decided. Plan to span over whole mass effect series and possibly beyond.
Rated: T - English - Adventure/Romance - Chapters: 12 - Words: 19,454 - Reviews: 51 - Favs: 93 - Follows: 150 - Updated: 5/28 - Published: 3/4 - SPARTAN-B312/Noble Six, Garrus V., Tali'Zorah, Shepard (M)
Red Cobra by Billybobjoe47s reviews
Last time the UNSC discovered a mysterious alien artifact, the Halos came within seconds of activating. Every problem the UNSC has had in the last 50 years has been because of aliens and their blasted artifacts. So when a newly-surveyed system holds a mysterious artifact, there is great cause for worry. Operation RED COBRA is intended to remedy that worry- by any means necessary.
Rated: T - English - Sci-Fi/Adventure - Chapters: 10 - Words: 22,621 - Reviews: 136 - Favs: 372 - Follows: 524 - Updated: 5/28 - Published: 1/6 - Master Chief/John-117, T. Hood
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: 19 - Words: 196,069 - Reviews: 1691 - Favs: 1,833 - Follows: 2,298 - Updated: 5/28 - Published: 10/9/2013 - Master Chief/John-117, T. Lasky, Admiral Hackett, Shepard (M)
Where Titans Tread by JLake4 reviews
As the Covenant acclimates to a much larger galaxy than they previously imagined, a Spectre returns from the dead. With the impending arrival of the Reapers and the awakening of an ancient evil, can Shepard and the Arbiter prepare the galaxy for an apocalyptic onslaught?
Rated: T - English - Sci-Fi/Suspense - Chapters: 16 - Words: 65,143 - Reviews: 50 - Favs: 37 - Follows: 41 - Updated: 5/27 - Published: 2/13 - Arbiter, Shepard (M)
Codex of the Multiverse by hunter 139 reviews
This is a document that details the history and composition of the factions in the multiverse. Multicrossover between several different franchises.
Rated: T - English - Sci-Fi - Chapters: 4 - Words: 6,503 - Reviews: 7 - Favs: 4 - Follows: 4 - Updated: 5/22 - Published: 2/17
Halo-Mass Effect: Codex by Azores reviews
Welcome to the Codex for the Crossover Book, Halo-Mass Effect: Altered Destiny. This Codex is to help get more in depth with the world of this Universe and explore more in depth certain events such as the Fall of Lorek and the Terra Nova Campaign, along with giving some key information on warships of the H-ME Universe. Enjoy.
Rated: K - English - Chapters: 4 - Words: 11,933 - Reviews: 10 - Favs: 11 - Follows: 21 - Updated: 5/21 - Published: 3/15 - J. Cutter, P. Cole, OC, Aria T'Loak
Better by CJ-T-Bone reviews
Sometimes a hero deserves more than he gets. Rated T because I'm paranoid. Oneshot.
Rated: T - English - Tragedy/Romance - Chapters: 1 - Words: 2,088 - Reviews: 9 - Favs: 16 - Follows: 9 - Published: 5/20 - [Cortana, Master Chief/John-117] Shepard (F) - Complete
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