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.

Following the Human-Covenant War, Mankind rebuilt; they adapted and recovered, but they never forgot the nightmare. They never forgot the genocide - billions dead and planets turned to glass. The UNSC established the Task Force Dominion to set the future into motion. The Glasslands Campaign begins on the former colony, Aragon. Formerly a Halo-Mass Effect crossover, discontinued.

Synthesis has been achieved, and now, the Reapers move to help rebuild...except one. Harbinger, amazed by humanity's success, moves to aid humanity. Now, brought to this world by one called "Librarian", Harbinger must use all his cunning to protect humanity from the greatest threat it's ever known...He also must now face something he never faced before: emotion...

The First Contact War brought untold destruction to Earth, reducing Humanity to a shell of its former self. For 900 years, Humanity has been working tirelessly to lay claim to its own slice of the Milky Way Galaxy, and they are prepared to bring the Council to its knees to accomplish their goals. (Massive AU, New Technologies, and a far different humanity.)

Shoulda changed this last update but forgot, story is discontinued as I plan on re-writing it, rewrite will be posted on my profile under "A Feeling of Importance MKII". A lot changes over six years, maturity and writing skill included.

Sending Shepard back in time? Inefficient. Unlikely to produce significant changes to timeline. Sending the Illusive Man back in time? Difficulty level has increased. Jack Harper, The Illusive Man, is back where it all started. New Cerberus, New plan, and the Reapers watching, always watching. Sending a Hero back in time does nothing; Sending back this guy? Priceless. AU.

A scientist and engineer is reborn by his AI creation to help save a galaxy thought fictional from an ancient enemy thought equally fictional. A player insert taking place during the events of Mass Effect 1, will become increasingly AU as the story progresses.

First Contact AU: What would you do if you find out that you were revived from death by moving your consciousness into a robotic body and then also learn that your descendants have established an interstellar empire that bows to no one? That's my situation right now. My name is David Escher Senior, and welcome to my rather turbulent second life.

This story has been discontinued. A rewrite is being made, starting with Halo-Mass Effect: Salvation's Light. (Out Now) Thank you everyone for all the support you've shown! It really means a lot. -Azores

The UNSC dispatches a small task force to investigate an artefact with origins not of the Orion Arm. The Citadel Races, including the Systems Alliance, are in for an eye opener when two new players in galactic prowess are not only technologically superior but also not bound by the Element Zero and its constraints. Rated T for reasons. AU in both Halo and ME events.

Space is infinite, but under the right conditions even a galaxy can feel too small.

Lost in a world unlike my own, I'm forced into following what was once code and programs into a battle for the fate of galaxy. What will I do? What will happen? Join me in my journey through uncharted territory alongside Shepard and her team against the Reapers. Starts from Mass Effect 1. Chapter 1 has been rewritten... May contain references to my other fanfics...

Is a second chance enough? Instead of the Catalyst's choices, Shepard lucks into a cosmic loophole. Thrown back to the very start of her Spectre career, she has to try and save the galaxy again from the Reapers ... but does she really know what's coming? 2015 NaNoWriMo winner!

My AU retelling of ME1 in a darker, sinister universe. Much darker and more realistic views of the SA and the Citadel Council, a more dangerous, involved Cerberus, and a more conflicted Saren and Benezia. Changes much of the ME1 dynamic to remove plot holes with more focus on politics, military strategy, and space combat. Pairing is FShep/Liara. Rewritten through Chapter 65 so far.