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

The Return of the Re-claimers by Master Builder reviews
The Dawn is not just split when it passed through the portal through space but time as well. Follow Master Chief as he makes his way to Earth only to find another Humanity occupying Earth. Why are they using alien technology and what are these new aliens? Halo and Major X-Over No pairings
Rated: M - English - Sci-Fi/Romance - Chapters: 3 - Words: 11,517 - Reviews: 57 - Favs: 173 - Follows: 197 - Updated: 9h - Published: 4/16/2015 - Master Chief/John-117, Cortana, Shepard (F), Miranda L.
The Mantle helps all by Master Builder reviews
What happens if the Quarians take drastic measures to ensure the continued survival of their species. The Mantle helps all in need and crush the ones who prevent it. Halo/Mass Effect/Transformers
Rated: M - English - Sci-Fi/Fantasy - Chapters: 4 - Words: 14,066 - Reviews: 87 - Favs: 353 - Follows: 421 - Updated: 12h - Published: 5/2/2015 - [Master Chief/John-117, Kelly-087] [Shepard (M), Tali'Zorah]
Hades Effect:Spartans of the Normandy by Johnnieboy11 reviews
In the year 2549, an ONI Spartan-III Team, known as Team HADES, goes missing with their ship, the UNSC Diamond in the Rough whilst on a mission to destroy a Covenant Staging ground. What neither they, nor the UNSC know is that the Spartans had been sent to a world beyond their own, a galaxy similar to theirs, but far more different... With a darker threat looming...
Rated: M - English - Sci-Fi/Romance - Chapters: 8 - Words: 28,031 - Reviews: 9 - Favs: 45 - Follows: 57 - Updated: 10/21 - Published: 12/19/2016 - OC, Shepard (F)
Remnants by General Rage reviews
From Halo's ashes, a mismatched Alliance is born. UNSC soldiers now serve alongside both Batarian deserters and shifty Jackal Space Pirates. Now Shepard and Master Chief have to keep these strange bedfellows from killing one another before they can stop an emergent new threat to the galaxy. The Next Swashbuckling Chapter of the Wormhole Chronicles.
Rated: M - English - Adventure/Sci-Fi - Chapters: 14 - Words: 309,069 - Reviews: 284 - Favs: 205 - Follows: 235 - Updated: 10/21 - Published: 4/22/2016 - Master Chief/John-117, Cortana, Tali'Zorah, Shepard (M)
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: 11 - Words: 27,805 - Reviews: 66 - Favs: 85 - Follows: 123 - Updated: 10/19 - Published: 8/14 - Master Chief/John-117, Garrus V., Tali'Zorah, Shepard (M)
The Roads of War by Sierra.BN312 reviews
Our galaxy is home to billions of stars, each star could hold new life, and every life holds a new story. Commander Jane Shepard attempts to rally the galaxy against the Reaper threat, but a distress signal leads her to discover more than what she bargained for.
Rated: M - English - Sci-Fi/Adventure - Chapters: 5 - Words: 64,454 - Reviews: 84 - Favs: 347 - Follows: 552 - Updated: 10/18 - Published: 4/30 - Master Chief/John-117, Cortana, Shepard (F)
Parasites Abound by Faithless wanderer reviews
The primordial became part of the flood but it did not simply become part of the gravemind no instead it watched over the war and when the halos rings fired it took over and set events in motion that would forever change the fate of another galaxy
Rated: K - English - Sci-Fi/Adventure - Chapters: 6 - Words: 20,591 - Reviews: 8 - Favs: 29 - Follows: 36 - Updated: 10/15 - Published: 8/23
HALO Mass convergence by SapphireDawn11709 reviews
Two Universe collide after the Forerunners fall and the Reapers return, will the two branches of Humanity placed in their respective Systems by a Forerunner Monitor unite or fall, only time will tell in this epic clash. When the UNSC Exploration and Research Vessel Light of Sol discover a strange artifact, they are opened up to the rest of the Galaxy after millennia of isolation.
Rated: M - English - Sci-Fi - Chapters: 19 - Words: 47,474 - Reviews: 194 - Favs: 351 - Follows: 466 - Updated: 10/15 - Published: 9/18/2016 - Master Chief/John-117, Cortana, Shepard (F), Tali'Zorah
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, told of their power; For while a challenge to a human is laughable, a challenge to humanity is a death sentence.
Rated: M - English - Sci-Fi - Chapters: 11 - Words: 123,941 - Reviews: 539 - Favs: 993 - Follows: 1,409 - Updated: 10/13 - Published: 2/21 - Master Chief/John-117, Cortana, Shepard (F), Garrus V.
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.
Rated: T - English - Chapters: 31 - Words: 303,421 - Reviews: 1092 - Favs: 1,667 - Follows: 2,127 - Updated: 10/13 - Published: 3/27/2011 - Master Chief/John-117, Tali'Zorah, Miranda L., Shepard (M)
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: 39 - Words: 127,620 - Reviews: 73 - Favs: 104 - Follows: 139 - Updated: 10/13 - Published: 10/21/2014 - SPARTAN-B312/Noble Six, Shepard (F)
Collectors at Dawn by jacksld850 reviews
The Master Chief and Cortana find themselves in an alternate reality and in contact with a mysterious black ops organization. Events soon spiral out of their control as they're forced into another battle for another humanity's survival.
Rated: T - English - Adventure/Sci-Fi - Chapters: 12 - Words: 59,153 - Reviews: 51 - Favs: 242 - Follows: 366 - Updated: 10/12 - Published: 1/20 - Master Chief/John-117, Cortana, Miranda L., Shepard (M)
Brothers until the End by SSJ Lone Wolf reviews
Noble Three and Six are left stranded on the Dawn after the Chief and Cortana get separated from them after the Ark fires. Thirty years later the pair wake up to find that the Galaxy was not as empty as they thought, new Spartan-IV running around, a Human-Sangheili alliance. At the same time Commander Jane Shepard's gets a new post as an XO of the UNSC Normandy.
Rated: M - English - Chapters: 7 - Words: 24,297 - Reviews: 51 - Favs: 111 - Follows: 148 - Updated: 10/10 - Published: 7/18 - Jun-A266/Noble Three, SPARTAN-B312/Noble Six, Shepard (F)
Buzzard Buccaneer Radio by General Rage reviews
Boz the Buzzard hosts this pirate radio station, beaming out music to the Normandy, Fallen Serpent, Crusty Chorka and Ascendant Justice non-stop. BBR has only one mission, to keep Rock n Roll alive in the dark void of outer space. A companion story to "Remnants" that shows what happens while Shepard is off playing hero. Part of the Wormhole Chronicles Saga.
Rated: M - English - Humor/Sci-Fi - Chapters: 6 - Words: 40,961 - Reviews: 51 - Favs: 39 - Follows: 43 - Updated: 10/7 - Published: 9/21/2016 - OC
The Lone Wolf Of The Normandy by SSJ Lone Wolf reviews
The Spartan-III Commando, Noble Six. After surviving Reach runs through a forerunner portal after receiving new Augmentations, Amour and Weapons and arrives on the colony of Eden Prime in 2183 CE. When the Geth are invading the Planet. The scum of the universe will soon learn why B312 is ranked as a Hyper Lethal Vector.
Rated: M - English - Sci-Fi/Adventure - Chapters: 18 - Words: 117,484 - Reviews: 544 - Favs: 690 - Follows: 900 - Updated: 10/3 - Published: 8/9/2016 - SPARTAN-B312/Noble Six, Shepard (F)
Shadow of N7 by jmichaelm99 reviews
During the events of Mass Effect 2, Commander Shepard discovers a SPARTAN super soldier stranded in the far reaches of the galaxy. Befriending this new ally, she embarks on her mission to shut down the collectors. During her mission she uncovers a dark truth about the reapers and the galaxies of the universe.
Rated: T - English - Sci-Fi - Chapters: 10 - Words: 17,308 - Reviews: 16 - Favs: 50 - Follows: 91 - Updated: 10/3 - Published: 12/10/2015 - Gravemind, Shepard (F), Harbinger
Fraught with Peril: A Halo Mass Effect Story by A-01 reviews
John was born for war, and even in the wake of defeating the Didact, there will be no respite. Thrust into the Mass Effect Universe he must either find his place or find his way home as his presence brings new hope to Shepard and his campaign against the approaching Reaper armada.
Rated: M - English - Adventure/Sci-Fi - Chapters: 11 - Words: 118,161 - Reviews: 184 - Favs: 461 - Follows: 621 - Updated: 9/30 - Published: 12/16/2016
The Grave Effect by zackthereaper74 reviews
Following the destruction of The Covenant Empire and Truth, The Gravemind had one last trick up it's sleeve for survival fusing it's entire consciousness with a human host ensuring it's survival. Now a lone marine and The Gravemind venture out beyond the galaxy they once knew to a somewhat familiar yet strange galaxy that is brimming with new possibilities.
Rated: M - English - Sci-Fi/Adventure - Chapters: 10 - Words: 35,156 - Reviews: 64 - Favs: 128 - Follows: 179 - Updated: 9/29 - Published: 5/16 - Gravemind, OC, Shepard (F), Garrus V.
A Man of War Series Codex by ShadowSoldiers reviews
On the crew deck of an unknown ship a 14 year old Quarian Exile was laying on her bunk in her new room, the lone occupat sat up with bloodshot eyes from crying at the lost of her family not just hours before. She looks blankly at the datapad that was given to her by her unknown rescuer.(Mostly codex based story with intros for OCs and My Shepard. Part 1 of 6 will be Saga)
Rated: M - English - Chapters: 2 - Words: 18,597 - Reviews: 8 - Favs: 27 - Follows: 41 - Updated: 9/26 - Published: 8/23
Exodus of the Damned by Codename-SURGEON reviews
The Reapers fell and with them fell our worlds. We drift alone in search of home and hope to one day build again. An artifact found provides a ray of hope. And those few who ventures through will seal our doom or not. Other worlds and other chances gives the Damned needed hope.
Rated: M - English - Sci-Fi/Adventure - Chapters: 14 - Words: 84,178 - Reviews: 117 - Favs: 299 - Follows: 434 - Updated: 9/22 - Published: 1/17/2016 - T. Lasky, Garrus V., Admiral Hackett
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: 24 - Words: 161,473 - Reviews: 666 - Favs: 1,131 - Follows: 1,506 - Updated: 9/13 - Published: 11/26/2013 - Master Chief/John-117, Cortana, Shepard (F)
The Reclamation has already begun by Fade Maybe reviews
The Master Chief has defeated the Didact. Across the galaxy, the Reaper War wages on as the Citadel races struggle to survive while Commander Shepard and the crew of the SSV Normandy fights on. But a deeply divided UNSC discovers a Mass Relay that will change the course of the war and galactic history forever. The Reclamation has already begun. And we are hopeless to stop it.
Rated: T - English - Adventure/Sci-Fi - Chapters: 22 - Words: 234,461 - Reviews: 707 - Favs: 763 - Follows: 998 - Updated: 9/11 - Published: 3/13/2013
Daily war with monster girls by Masterdude21 reviews
With the help of the highly-motivated extra-species in the military, mankind holds their own against the brutal onslaught of the Covenant. In their haste to close the gap in space warfare, ONI stumbles upon Relay 314. Even as new enemies arise, the galaxy constantly thwarts Cortana's schemes to build the Master Chief the ultimate harem. Halo/Mass Effect/Monster Musume crossover.
Rated: M - English - Humor/Romance - Chapters: 15 - Words: 197,249 - Reviews: 519 - Favs: 819 - Follows: 993 - Updated: 9/10 - Published: 9/20/2016 - 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: 23 - Words: 51,205 - Reviews: 113 - Favs: 73 - Follows: 89 - Updated: 9/10 - Published: 1/15/2015 - Gravemind
The Adventures of the Lucen: The VykurCorp Conspiracy by General Rage reviews
Liara T'Soni continued her mission to protect the Galaxy while Commander Shepard is in another dimension. She must stop the Covenant and the allies they've gathered from wreaking havoc in a Galaxy without it's greatest hero. While she's had some success, there's a gathering storm on the horizon and one of her crew of misfits will be forced to confront her past before it clears.
Rated: M - English - Sci-Fi/Adventure - Chapters: 5 - Words: 74,229 - Reviews: 58 - Favs: 68 - Follows: 72 - Updated: 9/8 - Published: 6/26/2016 - OC, Liara T'Soni, U. Wrex
379 | Page 1 2 3 4 11 .. Last Next »