ODST Captain Nathanial Renkov unintentionally becomes the first Helljumper to survive being dropped through a Slipspace anomaly. The problem? He has no idea where is and is surrounded by aliens the UNSC has no record of. Even worse? No one knows what the UNSC is. Follow his story as he tries to make sense of his new surroundings while trying to survive a new galactic threat.

Crow is stuck, but it's not all bad news; he's been offered shelter on the Normandy, and Spider can't hurt them here. Shepard now has an unkillable paracausal warrior, and his 'not-an-AI', Glint, is a complete cinnamon roll, but it's not all good news; he's half-starved, in culture shock, and has a bad case of trust issues. He might need work, sure, but who on this ship doesn't?

There are universes that diverge from a choice and there are universes that are fundamentally different from one another, forming a vast, limitless multiverse. In these set of universes, there are orbs that manipulate and alter any reality, rip apart the boundaries between them. If left unchecked, they will bring an end of everything. Welcome to the multiverse. Enjoy your stay.

Marcus thought he was done fighting after the death of Queen Myrrah, and the activation of the Imulsion Countermeasure. When he goes to help Baird investigate an abandoned COG facility, he will soon discover that while he ended one fight, another one has just begun.

When someone contacts the Quarians about old machinery, they should think twice before engaging with a strange yet so familiar species, a war, and circumstances that will shock two galaxies now that the rift is open.

What was supposed to be the day of his greatest honor became the day of his greatest loss. Now in a world and a time he does not recognize, J'onn J'onzz must face a choice. He can easily hide himself and his abilities for his safety. Or, he can be what he was meant to be. A Manhunter.

Xavier Holmes, a simple programmer and over all shut-in was killed during a bank robbery. however, instead of staying dead he was reborn as an A.I and transported to the Star Trek universe. Xavier didn't how it was possible but one thing was clear he'd decide his own future. I do not own anything of Mass Effect or Star Trek.

During the beginning of the Reaper War, Shepard is informed of a Prothean artifact claimed by Cerberus and sent to stop them. Little does he know is that soon, he will find himself and his crew in a world both familiar and alien to their own.

Mankind endures. Twice have alien invaders attempted to force humanity into extinction. Twice they have failed. Now, an uneasy peace covers the galaxy as enemies both ancient and new slumber, or pace beyond the walls. The balance is about to tip. A discovery has been made on a Human colony, faces familiar yet strange move against them, and in the middle of it all, a name. Shepard.

A Citadel Exploration fleet filled with people the council didnt want around discovers something that will change the face of Citadel Space forever. The council will experience a crash course in the fight for survival (Reaper Incursion Arc)

Sequel of Unlimited Rettousei. Had you ever wondered what would happen if the Citadel council meet a species that all its members have powers like the Asari but different, has a stronger military like the Turian, and tech more advance than the Salarian. All that without element zero, but more importantly, they do not want to follow their orders.

Master Chief wakes up in the Mass Effect universe and joins Commander Shepard in an effort to stop the Reapers. With time running out, can they stop the extinction of every species, or will they fade into legend?First, they got to stop the Reapers though...

In the vast multiverse events can happen that should never happen this is the story of one such event in a a universe that was should never have been.

The Death Star has been destroyed. While the Coalition celebrates, Ezra and Jaral return to Lothal, to spend some time with their family and introduce Luke to the ways of the Jedi. But the Empire is far from broken, as Grand Admiral Tanis and his fleet are already preparing to avenge the death of so many of their comrades.

It has been a year since Ghost returned to his own dimension. Since then, Shepard has kept on doing what she does best : preparing for the Reapers' arrival, and trying to wake the galaxy up to their impending doom, to little success. Now, as they stand at the edge of the precipice, a mysterious figure appears before Shepard : Grimm, the Troupe master...

In forgotten ages past, two near eldritch forces vied for the very life essence of the Galaxy. Unknown to the young races, that war is still ongoing. how can the UNSC, the Citadel Council or the Covenant hope to stand against such forces, when they are still embroiled in their own petty squabbling? How could they hope to survive the War of the Old Ones?

This is a Mass Effect - Halo - XCOM Crossover. In the year 2084 during the Asteroid Belt Offensive XCOM Elite Unit Strike-1 discovers an Ethereal Station but must Psionic Teleport away but something goes wrong. In the Year 2552 the UNSC Fearless an Orion-Class Assault Carrier is forced to escape Reach under heavy fire, during the Slipsapce Transit something goes wrong.

The knowledge of sin is the beginning of salvation. More than 40 years after the end of the war against the Covenant, a new storm is brewing on the edge of the human empire. Will the colonies of the Linwood Sector be able to withstand this new threat or will they burn like Harvest once did?

Death. It is something that doesn't discriminate. Many see it as the end though, for most who have experienced it, it is simply the beginning. Thus, I march onwards with my Gundam in this world unaware of the dark truths behind Mass Effect and the Relays.

Arya II of the House of Stark; Queen of Winter, the Trident, and the Mountain. She has always been seen as being more like her ancestors Roose Bolton and Ramsey the Bastard; as opposed to her ancestors Eddard Stark and Sansa Stark. But with war or peace with a whole galaxy in her hands, can Arya Stark II prove herself a merciful and honorable person to deal with? (Image not Owned)

Matriarch Lantaya is a brave explorer from the Golden Age of Asari space exploration, and she wants to go home. The Lone Wanderer is a messianic cyborg from a world scorched in nuclear fire, and he wants to save the wastelands. Courier Six is a tribal postman who usurped control of an entire city state. He wants to eat people. Among other things. (Also available on Spacebattles)

The Reaper invasion is nigh. Outnumbered and outgunned, the Citadel must turn to two new, dangerous allies for salvation: the Adeptus Mechanicus and Imperium of Man.

An odd little fusion between my favorite Bioware series thrown into a Star wars setting. So enjoy the read.

A battle against the forces of Chaos strands a Necron lord in the galaxy of Mass Effect. With what's left of his dynasty under his banner, Veronakh Lord of Solvatakh intends to lead his people to glorious conquest. Can Commander Shepard stop the Collectors and curtail the ambitions of the Necrons?

When faced with protecting an entire galactic community, it's always good to have friends and squad-mates at your side. But it's even better when you've got your brother with you as well. Get ready galaxy, because here come Alicia and Naruto Shepard, the Maelstrom Siblings. Rated M for swearing, action, gore, and implied sexual situations.