Noble Six was alone after the death of Emile. The Pillar of Autumn had left Reach, leaving the lone Spartan behind. But what if instead of dying on Reach, fighting to his last breath, Six survived? What if he escaped Reach and headed for Earth, only to end up in another galaxy, in another war? Will he agree to fight the reapers alongside aliens? Find out in Noble Effect

When Comander Keyes chased the Prophet of regret through the Slipspace portal with Master Chief, an anomaly occurred that threw the UNSC In Amber Clad into the Mass effect universe just before the reaper invasion

A crossover of Mass Effect and Halo. I'm combining my two stories An Iron Effect and Halo Evolved. The Forerunners were masters of Mass Effect technology 100,000 years before being destroyed by the Reapers. In an effort to defeat the Reaper the Forerunners created new technology not dependent on element zero. Reseeding the Halo species with technology/resources. Better sum inside.

With the help of the highly-motivated extra-species in the military, mankind holds their own against the brutal onslaught of the Covenant. In their haste to close the gap in space warfare, ONI stumbles upon Relay 314. Even as new enemies arise, the galaxy constantly thwarts Cortana's schemes to build the Master Chief the ultimate harem. Halo/Mass Effect/Monster Musume crossover.

Jane Shepard has seen it all. God Machines, pirate onslaughts, the under belly of the citadel, Prothean city worlds. dead races reborn on ice world, looked down the barrel of a Krogan shotgun determined to save his people but how will she deal when she meets men that have seen things that only exist in her nightmares.

To meet a being such as her? He did not understand. But their path? They walked it together.

A Reaper is launched from it's home galaxy during one of their many cycles, and spends countless years floating through the empty void of space. It's unintended destination results in the nearly destroyed machine unknowingly put in the middle of a galactic war between a coalition of religeous zealots and an ambitious race expanding over the stars. Picks up at the start of Halo: CE.

Arthur Ross a ONI Section Zero operative is transported to the Mass Effect universe to escape the Created, where he is quickly recruited by Cerberus believing in their goal of human dominance. Will he succeed in reclaiming Humanity's rightful place in the stars or fail like those before him.

A ODST is mysteriously transported to the Mass effect universe When a slip space accident occurs amidst the final evacuation of Reach. Will he be a help or hindrance in the fight to come? (All chapters rewritten.)

At the height of the Human Covenant war, another galactic power intervenes to aid the embattled humans. Standing side by side with the Turians, the UNSC prepares for a new phase of the Human Covenant war.

Six's life was a giant war. Every battle was a test of sheer tenacity and stubbornness against insurmountable odds. Every moment, every bullet fired, every Covenant, Insurrectionist, and Flood spore killed has led up to his last fight. Once again he was one of the few that stood between Earth and her enemies. This would be his final battle, and nothing could change that, right?

Death Battle, but between factions. Factions may not necessarily come from the HALO or MassEffect universes. You can ask fort factions you want to fight with each other in the comments. I found something like that on YouTube and decided to do it myself, on fanfiction, although on YouTube it was called otherwise, 'Faction Compare', I think.

Continuing from Best of Spartans and Spectres. Commander Shepard has been captured and Noble Six turns to the one group that can help save her, but will that help come at too great of a cost?

How far has Humanity truly come from it's humble beginnings, from once cavemen to those that can conquer the stars. For both were met with war yet one was welcomed into the fold while they other waged a hopeless war, and yet was able to survive. Now both and their allies now face a danger like none before, can they survive or will they meet extinction?

No one knew what would really happen when the slipspace bomb detonates. All they know is that whatever gets caught in it would be sent to "oblivion". No one expected what would happen when you mess with the 11 dimensions of splipspace. Now Noble Six faces a new galaxy along side two other "Six's", three Jorge's, a surviving team of ODSTs, and the sole survivor of The Savannah.

A small salvage ship comes across an interesting find while searching. Set before Halo 4 and before ME 2

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 team comes 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! Chapters 6-22 Being Rewritten!

When we started to expand past the Orin Arm of the Milkyway, we didn't know what to expect. Once we were out there though, things changed big time. For those brief 30 years we were the top dogs of the galaxy in all powers but like always when humanity reaches a higher seat of power, something always comes to make us fall... This time however the fall will cost our entire race.

B312 gets sent to the Mass Effect galaxy, he tries to go home by building a slipspace drive but problems pops up as building a slipspace drive is by nomeans easy.

Having long since combined forces, a fleet of the Humans and Covenants finest are torn from the universe they know to be thrown in to a strange and desolate reality. They will strive to uphold the Mantle against the Mass Effect's most Ancient Enemy. Will they break the cycle?

The USS Voyager comes face to face with the massive ship that is the UNSC Infinity after Voyager's nearly fatal first test of their quantum slipstream drive. Getting home isn't their only issue. They will have to work together in order to unravel the ancient threat that plagues the new galaxy that they find themselves in. Star Trek:Voyager, Mass Effect, and Halo triple crossover

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.

It is the year 3350, the races of the Milky Way have long put aside their grievances to unite under a single banner. They held on against dangerous threats and hoped to attain actual peace. After fighting the remnants of an extrgalactic empire, forces of the MWR shall be thrust into another galaxy that's so much like their own. A galaxy that just won its war for survival.

After a long, terrible war, the Federation of Sovereign Empires forms as the product of the alliance created early in the Great War between the Covenant Separatists and the UNSC. Time passes as they progress greatly, eventually discovering the existence of other galactic governments. The events that will follow will change the course of the galaxy in more ways than one. PART- 3

We thought ourselves powerful, able to conquer a galaxy with nothing but toys. When we overcame every challenge, breached the space between the galaxies themselves, what use were the words of a race ashamed of their own past? Yet we cannot deny that we were warned, for while a challenge to a human is laughable, a challenge to humanity is a death sentence.