In 2157 a Citadel Council exploratory vessel is tasked with opening a dormant Relay into unknown regions of the galaxy. What they find is something they never expected. What happens when two civilizations centered around different technologies clash?

When the seal broke and he opened his eyes, he had hoped to see his friends standing around him, welcoming him back to life. But now he's in a different time and all of his friends have long since passed away. Now the only thing he can do is put what he has been trained to be to good use and serve the galaxy from the shadows.

An ancient danger threatens the galaxy, unknown to all. A humanity which never discovered Prothean ruins, expanding through space on their own, emerges. Joined with the machines they created, hardened by war with a terrifying enemy, they read the writing on the wall. But will the galactic community already there listen to these newcomers, stirring up trouble everywhere they go?

An asari exploration vessel discovers Earth in the 2030's...and the first contact scenario has incredible implications for both species. What does humanity look like through alien eyes? Where do they go from here? /-AU: no Reapers, completely disconnected from the plot of the games, but mostly faithful to the setting. Told from many points of view.

Even after seeing their world burned, Humanity was able to stand up again, and push beyond their pre-war status and reach the heavens. But how will a hardened Humanity handle life among the stars? And how will others react to this aggressive newcomer?

The Prothean Ruins weren't. They contained little more than mentionings of an Alien Society; as a result, humanity develops on a completely different path than what was intended, and when first contact is made not with the Turians, but a desperate, destitute race viewed as beggars and thieves, how will this dying race change Humanity? And how will Humanity change the Galaxy? *A/U!*

The residents of the Koprulu Sector thought they had finally achieved peace. They were wrong. Now, the Koprulu Alliance is faced with a galaxy that was bigger than they thought. They will meet new friends, and more importantly, new enemies, but all will be forced to put away their hatreds, both old and new, or none will survive the darkness that is to come...

The Citadel Council is a peaceful conglomerate of races, blissfully unaware of the horrors that lurk beyond their space. Humanity, meanwhile, is a race that has fought against these alien horrors ever since they made contact. What will happen when the two societies meet? Will peace follow war? Or is the Citadel Council doomed to fall to humanity? Rewrite of When Civilizations Meet.

The Reapers left mass effect technology for the species to find so that the cycle would continue. However, what if a species was clever enough to avoid the trap. A magical and technologically advanced Humanity makes contact with the galaxy and prepares to break the cycle.

The Prothean empire left a great many Beacons behind after there fall, there purpose, to warn the younger races of the dangers of the Reapers. Unfortunately no one could understand them. What would happen if someone could.

A new race was discovered and annihilated. A century passed and Citadel space forgot, but Humanity never did.

When a strange device capable of remarkable feats is found in the Martian ruins, the course of humanity's history changes forever. The resulting leaps and bounds in technology leave humanity well prepared to deal with the rest of the galaxy. AU

It is said that War never Changes; Men do, through the roads they walk, but War does not. The Humans fought The First War, and alongside the Quarians, the Alliance stands tall against the Galaxy in the face of continued adversity. Now Humanity's place is challenged, their power tested, and age-old beliefs are shattered when a beyond-ancient species is forced onto the playing field.

Humanity found the Prothean ruins on Mars, but the data was corrupted. So, what happens when a race develops outside of the Reapers plans? And what of the machines of war that humanity has made?

Zero Requiem never did happen. Lelouch was never the demon emperor. He ruled justly over the years, as an immortal. The world was united under him, as war ceased to exist; they focused on the frontier above them: Humanity advances far beyond;Technology, moral, social, economy and development. Humanity became the first species to develop technologies without relying on element zero.

AU: A quickly advancing Humanity discovers early on the fate of the ancient Protheans and the threat of the Reapers. Instead of exploring the galaxy with wonder and optimism, the leaders of the Terran Nation prepare their young race to save themselves. When they finally make First Contact, they begin their ultimate gambit; To ready all the galaxy to fight the Reapers!

Nirn has been unified under the banner of the Empire, and its subjects reach to the stars. Fearing contact by a hostile species, they build up their military might; what will happen when an intrepid Batarian slaver ring opens a Mass Relay and attacks this Empire? Will they ever accept peace? M: V/L

There is nothing fair, just, or honorable about war. There is only winning and losing, the living and the dead. Humanity has learned this truth and has ascended to the stars. What effect will this have on the rest of the galaxy, one that has experienced millennia of peace? Will it be able to maintain the peace or will it be ushered into a new age of war? Let the end begin. A/U

The Ethereal assault on Earth was foiled by Colonel Jane Shepard. The Temple Ship taken intact, XCOM gained the capability to strike back against the Ethereals. However, Humans weren't the only species the Ethereals had set their sights on. For they were determined to make this cycle different.

Mr. House claims that in ten years, he'll have colonists set up on the moon. But what about twenty years later? Thirty? The sky is the limit when Mr. House and his top lieutenant discover alien ruins on Mars, and make a discovery that will change the galaxy forever.

The year: 2183. An attack on the Global Defense Initiative colony of Eden Prime threatens to ignite war between GDI and the Citadel, and only one woman can keep the peace, track down the attackers, and expose the true threat to the galaxy. Alt.Universe

A different history to Mass Effect in which Human technology develops along different lines than anything the Citadel knows...an Alternative History of Mass Effect.

They say a single choice can change the course of history. I'm not sure if that is true but I think it can certainly influence it. When I stood at the core of Panchaea all those years ago I had no idea what would come about as a consequence of my actions. So perhaps I did change history. But at the time all I did was what I thought was right. - Adam Jensen, 2078

Humanity discovers the Prothean Ruins soon after the first Mars Colony. Discovery of alien life jumpstarts their space program ... and the saga begins. A series of cameos, covering approximately 50 years worth of various characters. Rated T for safety.

Following the Human-Covenant War, Humanity finds a buried device that allows trans-galactic travel far faster than Slipspace. It was heralded as the greatest scientific find in Human history; the rest of the galaxy simply calls it the Mass Effect. Now mankind needs to forge a new place for itself among the stars.