Halo and Mass Effect Crossovers
Filters
617 | « Prev Page 1 2 3 4 5 12 .. Last Next »

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: 24 - Words: 49,716 - Reviews: 21 - Favs: 33 - Follows: 29 - Updated: 5/15 - Published: 4/21/2015
Operation Phoenix & Raven by Ordo Warrior reviews
Continuing from Best of Spartans and Spectres. Commander Shepard has been captured and Noble Six turns to the one group that can help save her, but will that help come at too great of a cost?
Rated: M - English - Chapters: 52 - Words: 171,955 - Reviews: 90 - Favs: 175 - Follows: 227 - Updated: 5/9 - Published: 10/21/2014 - SPARTAN-B312/Noble Six, J. Garson
Unwavering Eagle by Crazzytony reviews
How far has Humanity truly come from it's humble beginnings, from once cavemen to those that can conquer the stars. For both were met with war yet one was welcomed into the fold while they other waged a hopeless war, and yet was able to survive. Now both and their allies now face a danger like none before, can they survive or will they meet extinction?
Rated: T - English - Sci-Fi - Chapters: 1 - Words: 2,445 - Reviews: 2 - Favs: 3 - Follows: 3 - Published: 5/6 - Master Chief/John-117, Arbiter, Shepard - Complete
Mass Effect: Wayward Souls by ChroniclerofChaos07 reviews
No one knew what would really happen when the slipspace bomb detonates. All they know is that whatever gets caught in it would be sent to "oblivion". No one expected what would happen when you mess with the 11 dimensions of splipspace. Now Noble Six faces a new galaxy along side two other "Six's", three Jorge's, a surviving team of ODSTs, and the sole survivor of The Savannah.
Rated: T - English - Sci-Fi - Chapters: 2 - Words: 18,890 - Reviews: 38 - Favs: 160 - Follows: 242 - Updated: 4/27 - Published: 3/17 - Jorge-052/Noble Five, SPARTAN-B312/Noble Six, Shepard
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: 31 - Words: 226,020 - Reviews: 1048 - Favs: 1,866 - Follows: 2,455 - Updated: 4/24 - Published: 11/26/2013 - Master Chief/John-117, Cortana, J. Garson
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 team comes 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! Chapters 6-22 Being Rewritten!
Rated: T - English - Adventure/Sci-Fi - Chapters: 46 - Words: 1,373,225 - Reviews: 829 - Favs: 343 - Follows: 339 - Updated: 4/23 - Published: 6/21/2013 - Master Chief/John-117, Shepard
Element Halo by Iron Warriors reviews
When we started to expand past the Orin Arm of the Milkyway, we didn't know what to expect. Once we were out there though, things changed big time. For those brief 30 years we were the top dogs of the galaxy in all powers but like always when humanity reaches a higher seat of power, something always comes to make us fall... This time however the fall will cost our entire race.
Rated: T - English - Sci-Fi - Chapters: 24 - Words: 87,705 - Reviews: 267 - Favs: 570 - Follows: 813 - Updated: 4/15 - Published: 12/11/2017 - OC
Noble Tries To Go Home by The new god reviews
B312 gets sent to the Mass Effect galaxy, he tries to go home by building a slipspace drive but problems pops up as building a slipspace drive is by nomeans easy.
Rated: T - English - Sci-Fi/Adventure - Chapters: 4 - Words: 5,412 - Reviews: 20 - Favs: 51 - Follows: 71 - Updated: 4/13 - Published: 4/9 - SPARTAN-B312/Noble Six, Shepard
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: 20 - Words: 181,741 - Reviews: 383 - Favs: 1,129 - Follows: 1,363 - Updated: 4/8 - Published: 3/2/2015 - Cortana, J. Garson
Voyage unto Infinity by supertruckin reviews
The USS Voyager comes face to face with the massive ship that is the UNSC Infinity after Voyager's nearly fatal first test of their quantum slipstream drive. Getting home isn't their only issue. They will have to work together in order to unravel the ancient threat that plagues the new galaxy that they find themselves in. Star Trek:Voyager, Mass Effect, and Halo triple crossover
Rated: T - English - Sci-Fi/Adventure - Chapters: 14 - Words: 74,475 - Reviews: 505 - Favs: 1,275 - Follows: 1,706 - Updated: 3/31 - Published: 4/10/2019 - Master Chief/John-117, Cortana, Shepard
To Infinity by creamofwheat2311 reviews
After discovering an ancient artifact, the UNSC's most advanced warship and a Sangheili Assault Carrier are transported to a universe unlike anything they have ever seen, and forced into a war against a foe they never could have imagined.
Rated: T - English - Sci-Fi/Adventure - Chapters: 53 - Words: 473,247 - Reviews: 3982 - Favs: 5,048 - Follows: 5,993 - Updated: 3/30 - Published: 10/9/2013 - Master Chief/John-117, Arbiter, T. Lasky, Shepard
Broken Odyssey by Damie243 reviews
It is the year 3350, the races of the Milky Way have long put aside their grievances to unite under a single banner. They held on against dangerous threats and hoped to attain actual peace. After fighting the remnants of an extrgalactic empire, forces of the MWR shall be thrust into another galaxy that's so much like their own. A galaxy that just won its war for survival.
Rated: M - English - Sci-Fi/Drama - Chapters: 9 - Words: 43,306 - Reviews: 31 - Favs: 152 - Follows: 224 - Updated: 3/12 - Published: 2/7/2020 - OC, Shepard
War, Peace, and other Galactic Customs by The Almighty Afroduck reviews
After a long, terrible war, the Federation of Sovereign Empires forms as the product of the alliance created early in the Great War between the Covenant Separatists and the UNSC. Time passes as they progress greatly, eventually discovering the existence of other galactic governments. The events that will follow will change the course of the galaxy in more ways than one. PART- 3
Rated: M - English - Sci-Fi/Adventure - Chapters: 36 - Words: 402,465 - Reviews: 723 - Favs: 1,241 - Follows: 1,522 - Updated: 3/7 - Published: 3/1/2014
On the Illusion of Might by evevee reviews
We thought ourselves powerful, able to conquer a galaxy with nothing but toys. When we overcame every challenge, breached the space between the galaxies themselves, what use were the words of a race ashamed of their own past? Yet we cannot deny that we were warned, for while a challenge to a human is laughable, a challenge to humanity is a death sentence.
Rated: M - English - Sci-Fi - Chapters: 24 - Words: 266,953 - Reviews: 1762 - Favs: 3,072 - Follows: 3,931 - Updated: 2/21 - Published: 2/21/2017 - Master Chief/John-117, Cortana, Garrus V., Shepard
The Ghost Of Reach by SSJ Lone Wolf reviews
Following the disaster that was the Fall of Reach, Noble Six and Auntie Dot find themselves transported to a galaxy that is almost identical to their own...only humanity are not fighting for their survival from alien aggressors. Cut off from the UNSC and ONI, the two are forced to adapt to a galaxy not ravaged by war...unaware of the dark threat looming on the horizon.
Rated: M - English - Chapters: 1 - Words: 7,310 - Reviews: 19 - Favs: 165 - Follows: 215 - Published: 2/15 - SPARTAN-B312/Noble Six
Accounts of the Flood conflicts by hunter 139 reviews
A multicrossover 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: 38 - Words: 95,020 - Reviews: 196 - Favs: 150 - Follows: 164 - Updated: 2/13 - Published: 1/15/2015 - Gravemind
Shattered Glass by Lighting wolf knight reviews
A battle between Covenant fleets and UNSC warships is thrown into another galaxy by a Forerunner Galaxy. Now its up for a rookie admiral to stop the Covenant from wiping out all life... All while learning to learn his destiny. Rated T for violence, death, and profanity. Betas welcome... I don't know how Betas work for the person who keeps asking. Next chapter in August for now.
Rated: T - English - Adventure/Sci-Fi - Chapters: 16 - Words: 28,551 - Reviews: 25 - Favs: 62 - Follows: 85 - Updated: 2/7 - Published: 1/6 - [Kelly-087, OC] Admiral Hackett, Shepard
Mass Effect: Trailblazer by TallYapflip reviews
Humanity, left to its own devices for centuries, comes into contact with the Citadel Council. A misunderstanding leads to hostile first contact, and the UNSC is drawn into war with the Council shortly after the Insurrection's height. The Council finds itself face-to-face with a species that has broken the shackles of Mass Effect Technology. The Era of Humanity has only just begun.
Rated: M - English - Sci-Fi/Adventure - Chapters: 13 - Words: 64,686 - Reviews: 637 - Favs: 2,160 - Follows: 2,909 - Updated: 2/1 - Published: 7/14/2017 - Master Chief/John-117, J. Keyes, Miranda L., Shepard
Wolf Effect by 182ndHelljumper reviews
A team of Spartan II's named Wolfpack go on adventure after the events of Halo 4 and Spartan Ops an anomaly causes them to get sent into the Mass Effect universe starting where it all began on Eden Prime and they run into and ally themselves with Cmdr Shepard and the Normandy crew, Can both the Spartans and the Normandy crew prepare themselves for what lies ahead of them?
Rated: M - English - Adventure/Romance - Chapters: 31 - Words: 77,289 - Reviews: 9 - Favs: 32 - Follows: 39 - Updated: 2/1 - Published: 1/21 - [Shepard, OC] 343 Guilty Spark, C. Halsey
Folks Need Heroes by Bodacity2.0 reviews
A nuke, a slipspace portal, and a human digitizer - the perfect ingredients for the unexpected. Fortunately for Shepard and Co., a little unexpected, or in this case, a BIG unexpected, is just what this galaxy needs. Get ready to finish the fight, laser up, and give some people back their bombs.
Rated: T - English - Adventure/Sci-Fi - Chapters: 16 - Words: 115,804 - Reviews: 311 - Favs: 782 - Follows: 1,174 - Updated: 1/31 - Published: 4/28/2020 - Master Chief/John-117, Miranda L., Shepard
Vanguard of The Great Journey by VaultoftheExalted reviews
The Covenant Empire discovers an ancient construct on the fringes of their domain. They interpret it as an ancient Forerunner slipspace device. Upon the destruction of a scout probe they send through the relay, they send Thel'Vadamee to the other side to secure the partner. 'Vadamee unknowingly takes the Fleet of Particular Justice into a galaxy embroiled in war with the Reapers.
Rated: T - English - Sci-Fi/Suspense - Chapters: 2 - Words: 6,721 - Reviews: 37 - Favs: 53 - Follows: 94 - Updated: 1/23 - Published: 1/18
Reckoning of the Reclaimers by metts101 reviews
The Great War turned Humanity into something ugly. Their species' brush with extinction left a bitter taste in their mouths and they sought to rectify that the only way they knew how. Revenge. With the the subjugation of the Former Covenant species Humanity vowed never to fall to the alien again, but will an Alliance of Alien species change their outlook on the galaxy?
Rated: T - English - Sci-Fi - Chapters: 5 - Words: 41,543 - Reviews: 64 - Favs: 257 - Follows: 359 - Updated: 1/19 - Published: 11/14/2020
Evolved Edge Effect by Nicogen reviews
Normally when one finds themselves in another world their life is going to be one filled with adventure. But after being hit by a train I found myself running for my life as the world exploded around me and literal monsters hunting me down. What's worse is that I just didn't find myself in a typical alternate universe. But a universe that was an amalgamation. MULTI X OVER SI.
Rated: M - English - Sci-Fi/Adventure - Chapters: 3 - Words: 17,879 - Reviews: 11 - Favs: 42 - Follows: 68 - Updated: 1/13 - Published: 1/1
The Spirit of Humanity by Kazlin reviews
After decades of ponderous travel through space the UNSC Spirit of Fire stumbles across the drifting tomb of Humanities greatest hero. Within the ship they find the means of possibly making it home, but to get there they will have to make alliances that could upend the balance of power in the Galaxy and change everything the Council races thought true.
Rated: M - English - Sci-Fi - Chapters: 5 - Words: 20,227 - Reviews: 194 - Favs: 787 - Follows: 1,252 - Updated: 1/5 - Published: 5/24/2018
What Comes After Winter by JohnFlyer reviews
Down but not out after the fall of Reach, Noble Six is unwittingly sent to another reality. With Halsey as a nefarious ally, and ONI as a potential enemy, his loyalties are now split and he'll need help. He'll need to uncover a sinister plot transcending both worlds, battle foes near and far, and learn to work with unexpected and alien allies. Time to pick up a new team.
Rated: M - English - Adventure/Romance - Chapters: 6 - Words: 70,916 - Reviews: 63 - Favs: 232 - Follows: 323 - Updated: 12/19/2020 - Published: 2/7/2020 - SPARTAN-B312/Noble Six
617 | « Prev Page 1 2 3 4 5 12 .. Last Next »