When you become an extragalactic entity, meeting other galactic civilizations becomes an inevitable occurrence, and First Contact rarely goes well for the less-advanced society. Pre-ME through ME3. Rated T for language and implied sexual situations later on. Extremely Light parody on Halo OPness AKA Halo tech taken to its logical conclusion.

Fleeing from their universe, the reaper defector Enigma and his allies stumble into a new conflict. A conflict where the victim is out numbered and faced with extinction. The white reaper is not about to sit on the sidelines and watch this time... *Please read 'Mass Effect: The reaper Enigma' before reading this to reduce confusion.*

After a long deserved rest, the Master Chief awakens in a whole new galaxy.

A turian fleet stumbles on a human colony in the wake of the Covenant War. What will ensue?

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.

"We fought, we bled, we died for our inheritance. We were Gods, and we were finally ready to pass down our Mantle. Then we were betrayed, vanquished from the stars and blotted from history. We have learned from our mistakes. We understand why the Precursors did what they did. We are the Reclaimers, and we will ensure that you face true retribution for your actions." ABANDONED

A Spartan team is a formidable fighting force. They can turn the tide in battles, stop invasions, save entire planets. But in a new universe, against a new enemy, their strength and prowess may not be enough...

A Batarian Pirate fleet stumbles upon a dorment relay in a previously unknown system. What's more interesting is that they find a world made of glass. Let's see what unfolds next.

As the UNSC is nearing defeat at the hands of the Covenant, the Allies intervene to prevent the Council from potentially gaining a new ally, and avert the need for another total galactic war.

John had always known what he could do, if given a challenge. He'd known his capabilities ever since he'd been a child, let alone a SPARTAN. But now, after surviving a trip he honestly shouldn't have, he's stuck on a planet with no orders, no manual, and no amount of training that could've prepared him for the situation he's now faced with... a Mindoir farm girl named Shepard.

In his death throes, Noble-6, the last of his team of advanced SPARTAN-IIIs, does the unthinkable. He touches Cortana's undelivered AI core at the center, blacking him out. when he awakens, he is aboard an unknown ship with his teammates and a cast of strange characters. Adventure awaits at every corner, picking up new-found friends on the way.

A strange tuning fork shaped artifact has discovered on the far reaches of the System Alliance's space... ...But there have been whispers of colonies disappearing... THE FLOOD IS COMING... This is ME in a Halo universe

ABANDONED! too much plot hole and suck plot. v2 on progress

this is a au story 1 the kig-yar open a star sling shot and the Galaxy is flip up side down and soon the universe will follow

Mistakes are a universal constant, they are made constantly by every race that has ever been known. But mistakes made by a single Batarian ship and the Turians in pursuit of it, will have far more reaching consequences than most. Halo/Mass Effect Crossover, AU

One hundred years after the Reaper's harvest, the remaining inhabitants of the galaxy are running for their lives and searching for a new home. When a lone vessel enters an area denied to the Reaper's harvest, they make contact with a race that could end the cycle for all time and return the galaxy to its former glory. Rated M for language.

In the ages of humanity there has been three generations. The first two were destroyed by the reapers. Now one young member of the Orbital Drop Shock Troopers will try to stop it happening again. His people are gone but he will keep fighting to save the , Third Generation.

The Covenant has assimilated humanity into it's ranks, and now they stand on equal footing with the sangheili. A CCS-class battlecruiser is exploring the Perseus Arm of the galaxy when it encounters a new race who call themselves "Turians".

.cancer

While Humanity and Covenant are enjoying their peace, the Sangheili colony of Axiom Prime finds itself under attack by a mysterious new race. The UNSC and Covenant are quick to respond, but why is the Master Chief deployed? What happened 30 years ago, when Chief decided to stop being the machine? And how exactly will a lone survivor cope with loss?

Centuries after the end of the great war, the UNSC and Neo-covenant now live in peace, but what happens when they discover not just one but two splinter fraction of humans? The System Alliance and their Citadel and Prehistoric humanity and their old allies. But with their welcoming appearance, so will ancient threats loom around the corner ready to wage war...

The Forerunners sacrificed themselves for the younger race to see the future, but even they were not aware of threat older than they were. It's up the races the Forerunners saved, it's up to everyone to uphold the mantle of responsibility and fight for their future! should they fail, they must whatever is necessary, so that the younger generation can see a peaceful future...

The Protheans fought the Reapers and lost but did they fight alone. Awaken a young member of the ODSTs Jayden Dante finds himself trying to stop the reapers before they and wipe out another civilization. discontinued

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.

Noble team gets sent to the mass effect universe, will they be able to help Shepard stop the reapers or find a way back to reach and continue the fight against the covenant.