Halo and Mass Effect Crossovers
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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. (Alternate Universe)
Rated: T - English - Adventure/Romance - Chapters: 14 - Words: 24,947 - Reviews: 68 - Favs: 127 - Follows: 194 - Updated: 8/30 - Published: 3/4 - SPARTAN-B312/Noble Six, Garrus V., Tali'Zorah, Shepard (M)
HaloEffect: Rise of The Republic by Fernix13 reviews
With Great War ended, humanity and covenant merge. New formed Republic of Orion Arm is trying to create a war-free civilization, but what will happen when empire of 3000 worlds will meet another galactic goverment? Rated T for blood, death etc.
Rated: T - English - Sci-Fi - Chapters: 4 - Words: 11,265 - Reviews: 30 - Favs: 96 - Follows: 135 - Updated: 8/30 - Published: 8/24 - Master Chief/John-117, T. Hood, Shepard (F), Shepard (M)
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: 15 - Words: 46,751 - Reviews: 169 - Favs: 208 - Follows: 292 - Updated: 8/28 - Published: 5/8/2014 - OC
Shattered Universes by general MB reviews
Ch 12: Commander Shepard tries to sell his origin story to the people of Earth and Reach, while Halsey and Mordin's plan hits a snag. The Master Chief and his spartans are given a secret mission, as pieces start to fall into position. Events are occurring that will shape everything else that is to come.
Rated: T - English - Sci-Fi/Adventure - Chapters: 12 - Words: 86,373 - Reviews: 311 - Favs: 307 - Follows: 381 - Updated: 8/24 - Published: 1/3/2011 - [Tali'Zorah, Shepard (M)] Master Chief/John-117, J. Keyes
An Imperial Affliction by DONOVAN94 reviews
The war with the Reapers is over. Yet from the ashes a new threat emerges from the edge of the galaxy. Shepard is saved from the ruins of the Citadel but she now must fight a new and unknown enemy. Whilst a Sangheili warrior must face the truth of all he believes, and soon determine the fate of his species and the galaxy. [femshep/paragon/AU Halo/TalixSangheili/FemshepxGarrus]
Rated: T - English - Adventure/Romance - Chapters: 3 - Words: 25,258 - Reviews: 29 - Favs: 44 - Follows: 51 - Updated: 8/17 - Published: 1/10 - [OC, Tali'Zorah] [Shepard (F), Garrus V.]
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: 3 - Words: 13,936 - Reviews: 66 - Favs: 240 - Follows: 335 - Updated: 8/16 - Published: 8/6 - Master Chief/John-117, OC, Shepard (F)
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: 16 - Words: 28,523 - Reviews: 96 - Favs: 105 - Follows: 156 - Updated: 8/12 - 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: 15 - Words: 145,053 - Reviews: 217 - Favs: 554 - Follows: 689 - Updated: 8/12 - Published: 3/2 - T. Hood, Cortana, Shepard (F)
The Joining of Worlds-Part 1: No, I think were just getting started by Jaye Wolf reviews
Cortana and The Master Chief float aimlessly through space. What happens when a foe turned friend tells Cortana about the world they left behind. A Human/Covenant unity called the Systems Alliance, the wonders of their technology, and the discovery of a Prothean Archive on Mars. This new ally also speaks of another group of races under the banner of the Citadel Council.
Rated: T - English - Adventure/Sci-Fi - Chapters: 3 - Words: 32,913 - Reviews: 79 - Favs: 198 - Follows: 290 - Updated: 8/7 - Published: 7/24 - Master Chief/John-117, Cortana, Shepard (F), Shepard (M)
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: 5 - Words: 23,668 - Reviews: 81 - Favs: 214 - Follows: 331 - Updated: 8/7 - Published: 11/26/2013 - Master Chief/John-117, Cortana, Shepard (F)
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: 9 - Words: 12,072 - Reviews: 33 - Favs: 20 - Follows: 28 - Updated: 8/6 - Published: 1/15
Shadow Contingency by Andrithir reviews
To safeguard the UEG and its secrets, Task Forces with plausible deniability must be created in order to identify and neutralise threats posed by foreign and domestic powers. -Shadow Contingency Abstract
Rated: T - English - Adventure/Sci-Fi - Chapters: 3 - Words: 30,648 - Reviews: 37 - Favs: 100 - Follows: 133 - Updated: 8/4 - Published: 7/15 - Master Chief/John-117, Shepard (F)
Falling Skies Mk II by Mediam Noctem reviews
In a future where Humanity is in a constant state of war within and without, heroes constantly arise… and fall. Tens of Billions dead. Hundreds of planets forever tainted by genocidal aliens. Old hatreds arise out of the ashes with the intent of achieving vengeance and at the cost of many. In a future where there is no hope, how will humanity move forward?
Rated: T - English - Sci-Fi - Chapters: 3 - Words: 18,153 - Reviews: 35 - Favs: 41 - Follows: 57 - Updated: 8/3 - Published: 7/17 - 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: 20 - Words: 205,177 - Reviews: 1759 - Favs: 1,909 - Follows: 2,392 - Updated: 8/3 - Published: 10/9/2013 - Master Chief/John-117, T. Lasky, Admiral Hackett, Shepard (M)
Halo The Evolution Continues by UNSpaceCommand reviews
First time Crossover. Constructive Critic welcome. Enjoy and pls Review. Chapter 26 is up. 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: 26 - Words: 54,614 - Reviews: 308 - Favs: 390 - Follows: 454 - Updated: 8/2 - Published: 9/22/2011
Heroes UNITE! by So-Pro Warrior reviews
Commander Shepard and his team have gathered together the races of their Galaxy in an effort to defeat the Reapers. But is it enough? When the Commander and his team come across a strange woman they find out that if they are to truly defeat the Reapers once and for all. They will need all the help they can get. But not from their Universe. Multiverse Crossover!
Rated: T - English - Adventure/Sci-Fi - Chapters: 16 - Words: 428,050 - Reviews: 92 - Favs: 74 - Follows: 67 - Updated: 8/2 - Published: 6/21/2013 - Master Chief/John-117, Shepard (M)
The Spirit of Thessia by NewWorldFiction reviews
For several decades the Spirit of Fire has lumbered through the empty void to find not the UNSC, but something terrible: The destruction of the newly space faring civilization of the Asari by the hands of the Batarian Hegemony, a slaver species. Now, forced into a war that is impossible to win, the crew will face insurmountable odds against a enemy that cannot be beat. One-shot.
Rated: T - English - Chapters: 1 - Words: 14,054 - Reviews: 22 - Favs: 79 - Follows: 48 - Published: 7/29
The Cycle by Church -Caboose- 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: 28 - Words: 76,227 - Reviews: 115 - Favs: 33 - Follows: 47 - Updated: 7/29 - Published: 8/29/2012 - Arbiter, Prophet of Truth, Shepard (M), OC
Halo: Second Contact by Scorp4 reviews
The Citadel never met the Systems Alliance, so when the reapers arrive, the results are much more destructive. Project EXODUS is initiated as a fail-safe if the Reapers defeat the Citadel. How will this change the Galaxy? Who will rise up to the challenge? Will you still read this story even though its summary is bad? First time fanfic, so reviews are much appreciated.
Rated: T - English - Sci-Fi/Fantasy - Chapters: 4 - Words: 13,456 - Reviews: 61 - Favs: 149 - Follows: 212 - Updated: 7/26 - Published: 7/9
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: 17 - Words: 67,626 - Reviews: 53 - Favs: 39 - Follows: 44 - Updated: 7/23 - Published: 2/13 - Arbiter, Shepard (M)
The Last Spartan by DinoJake reviews
An AU fic in which the Halo and ME universes share the same galaxy. After a well deserved rest in Cryo-Sleep, Master Chief finally awakens...to a whole new galaxy.
Rated: T - English - Sci-Fi/Adventure - Chapters: 50 - Words: 457,589 - Reviews: 3243 - Favs: 2,764 - Follows: 2,812 - Updated: 7/21 - Published: 5/2/2010 - Master Chief/John-117
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: 8 - Words: 67,104 - Reviews: 234 - Favs: 441 - Follows: 586 - Updated: 7/21 - Published: 1/25 - J. Cutter, P. Cole, U. Wrex, Aria T'Loak
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: 5 - Words: 29,819 - Reviews: 43 - Favs: 83 - Follows: 126 - Updated: 7/18 - Published: 4/12 - Master Chief/John-117, T. Lasky, J. Locke, Shepard (M)
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: 9 - Words: 49,099 - Reviews: 26 - Favs: 44 - Follows: 80 - Updated: 7/9 - Published: 4/6 - Master Chief/John-117, OC, OC
Resonance by SounDemoN reviews
Crossover of Halo, Half-Life and Mass Effect, AU for all three. 27th Century Humanity encounters the Reapers and the Council races, while dabbling in teleportation technology, unknowing of the slumbering beast they would awaken. Rated K for the time being, will be upgraded as needed. I own none of the used existing fictional universes/characters/tech/stuff. Will add a cover later.
Rated: T - English - Sci-Fi/Adventure - Chapters: 9 - Words: 63,172 - Reviews: 50 - Favs: 86 - Follows: 122 - Updated: 7/8 - Published: 2/23
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