Halo and Mass Effect Crossovers
Filters
343 | Page 1 2 3 4 11 .. Last Next »

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: 15 - Words: 25,844 - Reviews: 78 - Favs: 80 - Follows: 128 - Updated: 2h - Published: 11/6/2014 - Master Chief/John-117, C. Halsey, OC, Shepard (F)
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: 10 - Favs: 39 - Follows: 24 - 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
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: 2 - Words: 22,871 - Reviews: 33 - Favs: 118 - Follows: 166 - Updated: 7/29 - Published: 7/24 - Master Chief/John-117, Cortana, Shepard (F), Shepard (M)
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: 57 - Favs: 133 - Follows: 183 - Updated: 7/26 - Published: 7/9
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: 4 - Words: 17,236 - Reviews: 59 - Favs: 169 - Follows: 266 - Updated: 7/25 - Published: 11/26/2013 - Master Chief/John-117, Cortana, 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: 2 - Words: 10,155 - Reviews: 25 - Favs: 33 - Follows: 45 - Updated: 7/24 - Published: 7/17 - Shepard (F)
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: 38 - Follows: 43 - 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: 3231 - Favs: 2,727 - Follows: 2,767 - 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: 67,075 - Reviews: 233 - Favs: 428 - Follows: 571 - 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: 79 - Follows: 119 - Updated: 7/18 - Published: 4/12 - Master Chief/John-117, T. Lasky, J. Locke, Shepard (M)
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: 2 - Words: 20,671 - Reviews: 20 - Favs: 68 - Follows: 89 - Updated: 7/17 - Published: 7/15 - Master Chief/John-117, Shepard (F)
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: 13 - Words: 21,680 - Reviews: 61 - Favs: 112 - Follows: 175 - Updated: 7/14 - Published: 3/4 - SPARTAN-B312/Noble Six, Garrus V., Tali'Zorah, Shepard (M)
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: 8 - Words: 39,073 - Reviews: 125 - Favs: 258 - Follows: 378 - Updated: 7/12 - Published: 5/5 - Master Chief/John-117, OC, Shepard (F), Admiral Hackett
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: 43 - Follows: 79 - 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: 49 - Favs: 85 - Follows: 117 - Updated: 7/8 - Published: 2/23
CSA : Plains of Glory by I-IRONMAN-I reviews
(Multi-crossover) The Galactic War has passed. Some years after his disappearance, Kholo returns in a rampant and deadly search for an ancient Forerunner artifact. However, there is something much more sinister at work and his actions will carry much weight in the end.
Rated: T - English - Sci-Fi/Adventure - Chapters: 7 - Words: 24,567 - Reviews: 2 - Favs: 5 - Follows: 8 - Updated: 7/6 - Published: 1/12/2014 - Arbiter, OC, Saren A.
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: 11 - Words: 25,002 - Reviews: 148 - Favs: 401 - Follows: 570 - Updated: 7/4 - Published: 1/6 - Master Chief/John-117, T. Hood
Conquerors they Rise by JoeTheHighlord reviews
The year is 2650, nearly a century since the end of the Great War and the fall of the Covenant Hegemony. In that time great advances have been made in both technology and society, and the new government of the New Species Alliance enters a golden age. But, there are dark stirrings out in the vastness of space and soon Conquerors must rise again from the ashes of war.
Rated: T - English - Sci-Fi/Suspense - Chapters: 13 - Words: 74,202 - Reviews: 399 - Favs: 603 - Follows: 782 - Updated: 7/2 - Published: 7/16/2013 - T. Hood
Shattered Universes by general MB reviews
Ch 11: As Shepard plots his next move after the exposure of the Normandy, Mordin and Halsey plan to find out the identity of those responsible. (Yes, the fic is back!)
Rated: T - English - Sci-Fi/Adventure - Chapters: 11 - Words: 81,031 - Reviews: 305 - Favs: 297 - Follows: 362 - Updated: 7/2 - Published: 1/3/2011 - [Tali'Zorah, Shepard (M)] Master Chief/John-117, J. Keyes
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. *Slight rewrite to chapter 3 (chapter 2 if you don't count the prologue) to fix certain short-comings in the early works. That is, of course, when fanfiction updates the story.*
Rated: T - English - Chapters: 15 - Words: 120,725 - Reviews: 518 - Favs: 836 - Follows: 1,073 - Updated: 7/1 - Published: 3/27/2011 - Master Chief/John-117, Tali'Zorah, Miranda L., Shepard (M)
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: 196 - Favs: 517 - Follows: 633 - Updated: 6/28 - Published: 3/2 - T. Hood, Cortana, Shepard (F)
Critical Effect by Commander Thor reviews
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 - Reviews: 1 - Favs: 2 - Follows: 2 - Published: 6/28
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: 688 - Favs: 540 - Follows: 679 - 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: 1016 - Favs: 1,484 - Follows: 1,842 - Updated: 6/21 - Published: 1/26/2014
343 | Page 1 2 3 4 11 .. Last Next »