120 The Sword of the Geth » by Doctor poo and the TURDIS Dying on Mantle's Approach, Cortana wakes up in an unfamiliar environment. In her drive to get home, she 'employs' the assistance of the local synthetics. She never wanted to be a galactic overlord. But a UNSC AI in an environment woefully unprepared for one of her caliber makes an easy one.

1k+ All the Stars » by BlueWay 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.

33 Mass Effect: Forward Unto Dawn » by WildcatWarrior67 Spartans never die. They're just missing in action. At least, that's how the saying goes. But for the Master Chief and Cortana, they're no longer missing. Awaking in a different universe, the two of them will uphold their oath: to protect Earth and all her colonies. Only it won't be from the Covenant this time.

630 It Started At Shanxi » by SpaceTurtleOX Fifty 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.

1k+ The Unknown Defender » by Gabenator5 A new faction stirs, its green-clad enforcers seemingly unstoppable. Rumors spread, pirate bases go dark, and both the enslaved and kidnapped are discovered free. Who are these new interlopers, and what is their goal? For good or ill, the powers that be intend to find out. REWORK COMPLETED.

44 On the Shoulders of Giants by Shoot The Runner Two galaxies thrown together by a cosmic fluke. On one side of the galaxy, the war-weary UNSC vows to rebuild and become a giant in the stars so that they will never be so helpless again. Whilst another humanity is still finding its feet in the Citadel, with treachery and politics hindering its progress. How does the merging of two galaxies impact the course of all of their fates?

4 A fanfic idea of mine by Fantasy-and-SciFi-Lover Posting in both fanfiction and crossover sections.

Crucible of Clans by Lighting wolf knight He would have his revenge upon Atriox And he might up even doing things he didn't expect. Rated T for violence, death, and profanity

215 Accounts of the Flood conflicts » by hunter 139 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.

1k+ The Reclamation » by Fade Maybe Through ONI's manipulation, the UNSC stumbles upon a Mass Relay and is dragged into a new war. They'll discover the battered races of the Citadel, the political intrigue of its factions, and a second group of humans governed by the Systems Alliance, divided by Cerberus, and lead by Commander Shepard. Yet no one can stop what is to come: the Reclamation, and the death of the galaxy.

2 The USSC: A Timeline by SimplyLaggy A timeline of my USSC fanfic base. Feel free to use what's inside, but please gib me credit : REVAMP OUT 28/2/23 ENJOY

71 United Earths Empire: The Beginning of a New Age » by Destarien What if three Universes once separate come together. three different humanities with three different paths of technology merge into one galaxy. Citadel space will never be the same because the Schahl Empire and UNSC are here. Two Civilizations, one at war and one ready for war.

98 No Greater Calling » by silencewillfall0091 Because here's the thing. Turians, despite their reputations, had never loved war- not the suffering, the dying, nor the pain. They loved victory- the prevailing of clear good over clear evil- justice winning in the end, the beating of overwhelming odds for peace. And there was never more a clear example of this type of war than ours against the Covenant.