Halo and Mass Effect Crossovers
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The Spartan Crew Member by Daisy Rhine reviews
Commander Sheppard 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 supped up human was not one of them. I don't own Halo or Mass Effect Bungie and BioWare do.
Rated: T - English - Friendship/Adventure - Chapters: 1 - Words: 3,050 - Reviews: 4 - Favs: 11 - Follows: 20 - Published: 8/14 - Master Chief/John-117, Garrus V., Tali'Zorah, Shepard (M)
The Cycle by Church 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: 42 - Words: 122,678 - Reviews: 129 - Favs: 62 - Follows: 80 - Updated: 8/14 - Published: 8/29/2012 - Arbiter, Prophet of Truth, Shepard (M), OC
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: 4 - Words: 8,685 - Reviews: 177 - Favs: 487 - Follows: 743 - Updated: 8/13 - Published: 7/2 - Ashley W., Liara T'Soni, Mordin S., Shepard (M)
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: 22 - Words: 50,012 - Reviews: 106 - Favs: 66 - Follows: 84 - Updated: 8/12 - Published: 1/15/2015 - Gravemind
AU HaloUNSC Codex 2897 by VoiceofaRifle reviews
Codex of an alternate history of the UNSC by 2897
Rated: T - English - Sci-Fi - Chapters: 1 - Words: 916 - Reviews: 6 - Favs: 5 - Follows: 4 - Published: 8/10 - OC
Spartan meet Spectre by Naruko the 7th Hokage reviews
This is a crossover Fic based upon Halo and mass effect where Spartan John 117 meets Spectre Jane/John (I haven't decided yet) Shepard I haven't thought much about this tell you what I'll make this chapter then brainstorm if I get good feedback then I will continue if not then okay.
Rated: T - English - Adventure/Sci-Fi - Chapters: 1 - Words: 942 - Reviews: 9 - Favs: 6 - Follows: 12 - Published: 8/10 - Master Chief/John-117, Cortana, Shepard (F), Shepard (M)
Rise of a Spartan by Warrior of God2375 reviews
Confused in a foreign universe, our beloved Noble Six must battle his way through monstrous machines and enemies he has never encountered before. What will he do? And who will be there to help him find his path? Make sure to hit that review button, and enjoy!
Rated: T - English - Hurt/Comfort/Romance - Chapters: 14 - Words: 45,036 - Reviews: 99 - Favs: 134 - Follows: 170 - Updated: 8/6 - Published: 5/13/2012 - [SPARTAN-B312/Noble Six, Liara T'Soni]
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: 28 - Words: 272,915 - Reviews: 1002 - Favs: 1,598 - Follows: 2,029 - Updated: 8/4 - Published: 3/27/2011 - Master Chief/John-117, Tali'Zorah, Miranda L., Shepard (M)
Unyielding souls by quandoqueerthesuperhero reviews
Supreme Commander Thresk'Talamee is exploring an anomaly picked up by a probe, what he finds could change the course of the covenant and the war with Humanity. Admiral Jaehart Irilan is leading an exploration event to find colonies for the Salarian Union. Till he finds a probe from an unknown species, what will happen now? Rated T for violence and graphic depictions of death.
Rated: T - English - Sci-Fi/Suspense - Chapters: 1 - Words: 8,001 - Reviews: 3 - Favs: 12 - Follows: 18 - Published: 8/2
The Unknown Defender by Gabenator5 reviews
Whilst Shepard is closing in on Saren, rumors begin to spread among the Pirates and Slavers of the galaxy. Rumors of a nameless fear. of A creature, A Demon Wreathed in Green Armor. It and its allies appear from nowhere and stop their raids on Defenseless Colony Settlements. Slaughtering every Single Attacker... and then Vanishing without a trace. Who or What is this... Thing.
Rated: T - English - Adventure/Sci-Fi - Chapters: 15 - Words: 100,415 - Reviews: 681 - Favs: 1,539 - Follows: 2,041 - Updated: 7/31 - Published: 9/27/2016 - Master Chief/John-117, Cortana, Shepard (F), Tali'Zorah
The Avalon Federation Codex by DragonheartODST reviews
A full codex dedicated to the characters, cultures, places, objects, times, etc., related to the Concordian Cycle starting from Book One: Dawn of a New Age. Will be constantly updated alongside the books to fit with the details of the series. Please read the series first if you wish to gain a greater understanding.
Rated: T - English - Sci-Fi - Chapters: 6 - Words: 51,363 - Reviews: 45 - Favs: 24 - Follows: 23 - Updated: 7/30 - Published: 11/30/2016
Peace in Our Time by silencewillfall009 reviews
The Forerunner/Human union of the RIS rises to challenge the Citadel Council. Another superpower has risen. And they will claim their rightful place in the galaxy. Constructive criticism welcome.
Rated: T - English - Sci-Fi/Adventure - Chapters: 8 - Words: 6,250 - Reviews: 79 - Favs: 172 - Follows: 263 - Updated: 7/22 - Published: 3/23
Star League of the Orion Arm Codex by Reichenfaust reviews
Megaverse. A grand vision, on how Mass Effect, and others will be affected by a humanity forged from the influences of 1980's-2000's Sci-Fi and such. How will the Citadel deal with a humanity that has seen and has Cyborgs, Super-Soldiers, BattleMech's, WarShips, with more to come? Will contain dossiers on factions, weapons, characters, and such as we go.
Rated: T - English - Sci-Fi/Fantasy - Chapters: 3 - Words: 73,229 - Reviews: 14 - Favs: 71 - Follows: 68 - Updated: 7/10 - Published: 12/25/2016
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: 23 - Words: 536,053 - Reviews: 285 - Favs: 159 - Follows: 155 - Updated: 7/8 - Published: 6/21/2013 - Master Chief/John-117, Shepard (M)
A Spartan's Rebirth by Zarkun reviews
Fourth Generation Spartan Lucas Ryker is the Spartan without a team, preferring to shirk his fellow Spartans because they'd only "slow him down." However, when he's forced into cryo sleep during a mission to find the missing Master Chief due to extensive damage to the ship's life support, he'll wake up to a galaxy changed and realize working solo won't work this time.
Rated: T - English - Sci-Fi/Adventure - Chapters: 2 - Words: 3,186 - Reviews: 11 - Favs: 26 - Follows: 40 - Updated: 7/6 - Published: 11/18/2016
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: 11 - Words: 52,325 - Reviews: 44 - Favs: 218 - Follows: 334 - Updated: 7/3 - Published: 1/20 - Master Chief/John-117, Cortana, Miranda L., Shepard (M)
Changing Universes by GamerDroid56 reviews
I am a Spartan. I was in one universe, finishing this fight, when I was sucked into another universe. Can I save humanity from yet another more powerful alien race? Will I be able to end the Reaper threat? Read to find out! Starts during ME2
Rated: T - English - Sci-Fi/Friendship - Chapters: 8 - Words: 9,165 - Reviews: 11 - Favs: 40 - Follows: 70 - Updated: 7/2 - Published: 10/7/2016 - OC, Shepard (F), Admiral Hackett, Miranda L.
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: 11 - Words: 20,526 - Reviews: 8 - Favs: 11 - Follows: 8 - Updated: 7/2 - Published: 4/21/2015
Mass Effect - The Great Journey by ImperialSalesman reviews
Commander Shepard had failed. The Cycle continued, as planned. Now, the last cycle's failure will be the next cycle's trial, as the Great Journey draws ever near. Fighting against powers far beyond his own abilities, it is now up to Shipmaster Thel 'Vadamee to halt the return of the galaxy's most ancient foes, as dark powers work against everything he holds dear. (Halo AU)
Rated: T - English - Sci-Fi/Adventure - Chapters: 10 - Words: 39,453 - Reviews: 23 - Favs: 40 - Follows: 58 - Updated: 6/19 - Published: 2/3 - Arbiter, Rtas 'Vadumee, R. Moramee, Shepard (F)
Halo: Rise of the Spartans by NightKnightMike reviews
After the end of the Human-Covenant War, humanity has been reduced to a VERY small number. That number being the Spartans that survived the aftermath. But even though everything is dead the Spartans still must protect whats left of humanity, by rebuilding from the ashes and repopulate. and rebuilding isn't the hard part...
Rated: T - English - Adventure/Sci-Fi - Chapters: 2 - Words: 1,894 - Reviews: 23 - Favs: 50 - Follows: 83 - Published: 6/14
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: 21 - Words: 230,840 - Reviews: 655 - Favs: 732 - Follows: 941 - Updated: 6/3 - Published: 3/13/2013
Halo-Mass Effect: Salvation's Light by Azores reviews
Every Great Journey begins with a single step. Every great story has a beginning. Witness the beginning to the Halo-Mass Effect Trilogy with Halo-Mass Effect: Salvation's Light. (4 chapter, Halo-centric Prologue; Slight Alternate-Universe)
Rated: T - English - Sci-Fi - Chapters: 2 - Words: 16,330 - Reviews: 20 - Favs: 82 - Follows: 113 - Updated: 5/31 - Published: 12/24/2016 - J. Cutter, OC, Warden Eternal, Atriox
A Dark Rising by RedShirt1453 reviews
It has been 35 years since the end of the First Contact War. Humanity has won through the means of a great discovery and now controls most of the known galaxy. But with this victory came disease, a victor's disease that rots humanity to its core. This corruption has spread to every fabric of its society turning the victors, into monsters. It cannot be stopped, but can we survive?
Rated: T - English - Adventure/Sci-Fi - Chapters: 18 - Words: 84,428 - Reviews: 125 - Favs: 77 - Follows: 91 - Updated: 5/25 - Published: 11/7/2016
HaloEffect: Rise of The Republic by Fernix13 reviews
When Great War ended, humanity and covenant merged. New formed Republic of Orion Arm is trying to create a war-free civilization, but what will happen when this empire will meet another galactic goverment? Rated T for blood, death etc. Multiverse crossover (Cancelled)
Rated: T - English - Sci-Fi - Chapters: 9 - Words: 18,198 - Reviews: 85 - Favs: 300 - Follows: 362 - Updated: 5/14 - Published: 8/24/2015
Mirrored Fates by long night of solace reviews
After the defeat of the didact, the galactic hero of the halo universe - Masterchief and his loyal blue team members embark on a strange new journey to an unknown universe in which later they come into contact with that universe's hero - Commander Shepard. Facing an unknown enemy, fighting a new war, its up to the heroes to save the day together.
Rated: T - English - Sci-Fi/Adventure - Chapters: 19 - Words: 171,269 - Reviews: 127 - Favs: 254 - Follows: 307 - Updated: 5/8 - Published: 5/3/2016 - Master Chief/John-117, Cortana, Admiral Hackett, Shepard (M)
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