Halo and Mass Effect Crossovers
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Vanguard of The Great Journey by VaultoftheExalted
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: 1 - Words: 3,131 - Follows: 2 - Published: 2h
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.
Rated: T - English - Adventure/Sci-Fi - Chapters: 7 - Words: 9,499 - Reviews: 14 - Favs: 23 - Follows: 35 - Updated: 15h - Published: 1/6 - [Kelly-087, OC] Admiral Hackett, Shepard
The Lion,The Wolf, and The Bear by 27grey reviews
Jane Shepard has seen it all. God Machines, pirate onslaughts, the under belly of the citadel, Prothean city worlds. dead races reborn on ice world, looked down the barrel of a Krogan shotgun determined to save his people but how will she deal when she meets men that have seen things that only exist in her nightmares.
Rated: T - English - Chapters: 6 - Words: 17,214 - Reviews: 10 - Favs: 50 - Follows: 95 - Updated: 1/11 - Published: 12/15/2020 - Garrus V., Tali'Zorah, Shepard
Once a Rookie, Always a Rookie by Twisted Fate MK 2 reviews
(Credit to Adrasos on Archive and his story, Prepare to Drop, for the idea.) On the way down to New Mombasa, Rookie falls into the Slipspace Rupture and ends up crashing down on Menae, high above Palaven, while Shepard tries to find and rescue the new Primarch. From there, the war itself will shift and the fighting persists, but who knows what an ODST will add to the mix.
Rated: T - English - Adventure - Chapters: 56 - Words: 272,505 - Reviews: 501 - Favs: 886 - Follows: 1,199 - Updated: 1/7 - Published: 9/27/2018 - Rookie, Shepard, Javik
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: 23 - Words: 45,383 - Reviews: 58 - Favs: 30 - Follows: 24 - Updated: 1/2 - Published: 4/21/2015
Noble Effect by LoneSpartan52 reviews
Noble Six was alone after the death of Emile. The Pillar of Autumn had left Reach, leaving the lone Spartan behind. But what if instead of dying on Reach, fighting to his last breath, Six survived? What if he escaped Reach and headed for Earth, only to end up in another galaxy, in another war? Will he agree to fight the reapers alongside aliens? Find out in Noble Effect
Rated: T - English - Sci-Fi - Chapters: 13 - Words: 48,274 - Reviews: 92 - Favs: 177 - Follows: 252 - Updated: 1/1 - Published: 7/3/2020 - SPARTAN-B312/Noble Six, Garrus V., Shepard, Javik
An Old Machine's New Home by Edgeoftoday reviews
A Reaper is launched from it's home galaxy during one of their many cycles, and spends countless years floating through the empty void of space. It's unintended destination results in the nearly destroyed machine unknowingly put in the middle of a galactic war between a coalition of religeous zealots and an ambitious race expanding over the stars. Picks up at the start of Halo: CE.
Rated: T - English - Sci-Fi/Adventure - Chapters: 4 - Words: 19,863 - Reviews: 42 - Favs: 141 - Follows: 209 - Updated: 12/31/2020 - Published: 8/22/2020 - Master Chief/John-117, Arbiter, J. Keyes, Cortana
All the Stars by BlueWay reviews
When the Long Night of Solace is evaporated over Reach via the weaponized usage of a Slipspace Drive, it ferries with it in its swallowed sections the Covenant Empire and, more horrifyingly, the desperate measures that the UNSC used to fight them. When they are found in a universe on the precipice of their own history, the meaning of the term "Mass Effect" will change forever.
Rated: T - English - Sci-Fi/Adventure - Chapters: 30 - Words: 542,028 - Reviews: 775 - Favs: 1,125 - Follows: 1,413 - Updated: 12/28/2020 - Published: 6/8/2018 - SPARTAN-B312/Noble Six, Rookie
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: 52 - Words: 454,639 - Reviews: 3907 - Favs: 4,833 - Follows: 5,720 - Updated: 12/20/2020 - Published: 10/9/2013 - Master Chief/John-117, Arbiter, T. Lasky, Shepard
The Reclamation by Fade Maybe reviews
A UNSC cruiser activates a dormant Relay, forcing the politically divided UNSC into a new war against the Reaper menace. This time Humanity will not stand alone. Now surrounded by diplomatic adversaries and renegade rivals and contenders, Humanity will face a new set of challenges unlike anything it has seen before. The Reclamation has already begun, and we are hopeless to stop it.
Rated: T - English - Adventure/Sci-Fi - Chapters: 46 - Words: 418,937 - Reviews: 1441 - Favs: 1,465 - Follows: 1,851 - Updated: 12/15/2020 - Published: 3/13/2013
Were it So Easy by Sigma0327 reviews
Six's life was a giant war. Every battle was a test of sheer tenacity and stubbornness against insurmountable odds. Every moment, every bullet fired, every Covenant, Insurrectionist, and Flood spore killed has led up to his last fight. Once again he was one of the few that stood between Earth and her enemies. This would be his final battle, and nothing could change that, right?
Rated: T - English - Adventure/Sci-Fi - Chapters: 2 - Words: 12,600 - Reviews: 18 - Favs: 181 - Follows: 262 - Updated: 12/12/2020 - Published: 11/9/2020 - SPARTAN-B312/Noble Six, Tali'Zorah, Miranda L., Shepard
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: 45 - Words: 1,348,217 - Reviews: 797 - Favs: 318 - Follows: 320 - Updated: 11/24/2020 - Published: 6/21/2013 - Master Chief/John-117, Shepard
The Final Frontier: The Last Cycle V2 by WisdomOfCelestials reviews
Humanity has not met the Council, nor met the Covenant, and a two-pronged First Contact is due. How will these meetings shape the future to come, and the future that might have been? Buffed Humanity, Buffed Reapers,Halo/Mass Effect Crossover, Combined Universes, Modified Timeline. Rework of the older The Final Frontier: The Last Cycle. Use App, Browser Broke.
Rated: T - English - Adventure/Sci-Fi - Chapters: 7 - Words: 56,776 - Reviews: 100 - Favs: 350 - Follows: 478 - Updated: 11/21/2020 - Published: 10/1/2020
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: 4 - Words: 33,903 - Reviews: 41 - Favs: 181 - Follows: 249 - Updated: 11/19/2020 - Published: 11/14/2020
Los Spartan Nunca Mueren by TragicAsesino56 reviews
Noble 6 no murió se fue a otro lugar muy diferente al suyo, ahora deberá salvar a la galaxia con su nuevo equipo (Advertencia: este fic tendrá Lemon en algunos capítulos)
Rated: T - Spanish - Adventure/Romance - Chapters: 2 - Words: 7,566 - Reviews: 2 - Favs: 3 - Follows: 2 - Updated: 11/4/2020 - Published: 12/15/2017 - SPARTAN-B312/Noble Six, Ashley W., Kaidan A., Saren A.
The Damaged ODST by Rookie1998 reviews
An ODST is mysteriously transported to the Mass Effect universe when a slip space accident occurs amidst the finale evacuation of Reach. Will he be a help or hindrance in the fight to come? (All chapters rewritten.)
Rated: T - English - Adventure/Sci-Fi - Chapters: 6 - Words: 15,551 - Reviews: 14 - Favs: 39 - Follows: 77 - Updated: 10/30/2020 - Published: 9/19/2019 - OC, Shepard
The Final Frontier : The Last Cycle by WisdomOfCelestials reviews
AU. Halo/Mass Effect Crossover, Combined Universes. Humanity has not met the council. Considerably buffed Humanity. Buffed Reapers. Several OCs. Being reworked, with the author actually being able to work on it now.
Rated: T - English - Sci-Fi/Adventure - Chapters: 3 - Words: 15,270 - Reviews: 30 - Favs: 154 - Follows: 213 - Updated: 10/23/2020 - Published: 1/1/2018
To Hell and Back by Silas4lagoon reviews
After four years of drifting in space, the Master Chief and Cortana have finally returned. Unfortunately, not everything is the same as it was from when they left. Many creatures still lurk about in the depths of the unknown, making the galaxy just as dangerous. But what happens when the most dangerous super soldier in the galaxy runs out of his most valuable skill?
Rated: T - English - Sci-Fi/Suspense - Chapters: 4 - Words: 9,854 - Reviews: 21 - Favs: 47 - Follows: 106 - Updated: 9/29/2020 - Published: 9/13/2020 - Master Chief/John-117, Cortana, Shepard
The Wreck by Gabenator5 reviews
After the Normandy's destruction, Tali'Zorah goes out to traverse the lesser explored places in the galaxy in search of rare materials for the Migrant Fleet. While on her adventures she finds something that shouldn't belong... she finds a Wreck... The Galaxy will never be the same.
Rated: T - English - Fantasy/Sci-Fi - Chapters: 7 - Words: 17,121 - Reviews: 307 - Favs: 889 - Follows: 1,386 - Updated: 9/28/2020 - Published: 1/7/2018 - Tali'Zorah
The Spartan Crew Member by Daisy Rhine reviews
Commander Shepard and his crew find the other half of the ship that MC is on. When they find him they have no idea what they should expect but an chemically suped up human was not one of them. I don't own Halo or Mass Effect 343industries and BioWare do.
Rated: T - English - Friendship/Adventure - Chapters: 37 - Words: 75,377 - Reviews: 217 - Favs: 375 - Follows: 496 - Updated: 9/24/2020 - Published: 8/14/2017 - Master Chief/John-117, Garrus V., Tali'Zorah, Shepard
Halo: Clash of Galaxies by Jochern reviews
Through unknown forces of immense and unimaginable power, two galaxies merge and superpowers of both galaxies is forced to deal with the reality of the broken status quo. Jane Shepard, first human Spectre, finds herself in the center of the events to come, for in the dark void outside the galaxy, the Reapers prepare their return to cleanse this new galaxy of life.
Rated: T - English - Sci-Fi/Adventure - Chapters: 16 - Words: 50,265 - Reviews: 70 - Favs: 228 - Follows: 340 - Updated: 9/12/2020 - Published: 9/5/2019 - T. Hood, J. Garson, Garrus V.
It Started At Shanxi by SpaceTurtleOX reviews
One hundred years after the end of the Human-Covenant War an ill-fated UNSC expedition opens Relay 314, revealing a civilization unprepared for their arrival, and relics from a terrible past.
Rated: T - English - Sci-Fi/Adventure - Chapters: 15 - Words: 73,507 - Reviews: 483 - Favs: 1,412 - Follows: 2,172 - Updated: 9/6/2020 - Published: 7/26/2019 - Master Chief/John-117, Cortana, Zaeed M., OC
Spectre (english version) by blackshamrock333 reviews
Galaxy's peace is at stake, following the attack of Eden Prime by Citadel's lackey. However, for a handfull of high-ranking UNSC officer, something is off and it's now the job the Normandy crew to find the truth.
Rated: T - English - Sci-Fi - Chapters: 6 - Words: 11,532 - Reviews: 10 - Favs: 14 - Follows: 26 - Updated: 8/31/2020 - Published: 5/4/2020
Spectre by blackshamrock333 reviews
L'équilibre galactique est sur le point d'être rompu, suite à l'attaque d'une colonie humaine par ce qui semble être des laquais de la citadelle. Toutefois, pour certains hauts gradés, il y a anguille sous roche. Une lourde tâche repose donc à présent sur l'équipage du prowler de l'UNSC Normandy: découvrir la vérité et empêcher une guerre fatalement dévastatrice.
Rated: T - French - Adventure/Sci-Fi - Chapters: 9 - Words: 23,201 - Reviews: 2 - Favs: 4 - Follows: 6 - Updated: 8/24/2020 - Published: 7/25/2019 - Shepard
The Lost Civilization by Apollonir reviews
After the Battle of the Ark, a UNSC Pelican dropship crash lands on Thessia. Two ODSTs survive the crash and make contact with primitive Asari. Ninety thousand years later, Liara T'Soni discovers a strange looking aircraft and Human remains in an ancient cave burial chamber. The discovery she makes will take the Asari on a journey to discover their true lineage.
Rated: T - English - Mystery/Suspense - Chapters: 11 - Words: 21,642 - Reviews: 521 - Favs: 1,649 - Follows: 2,333 - Updated: 8/22/2020 - Published: 7/2/2017 - Ashley W., Liara T'Soni, Mordin S., Shepard
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