Two galaxies isolated from one another meet for the first time, just as the war between two opposing factions escalates. But the galaxy has more than first contact with a race of machines to worry about, ideals will be tested as an ancient evil returns to begin a cycle of genocide. A leader from the ranks of the Autobots must rise to stop both the Decepticons and the Reapers.

He was a hero, vanquisher of men and beasts, daedra and dragons. But now, Fate calls him elsewhere. How will he fare in this world, so unlike his own? "Wait... are those... rabbit ears?"

The beginning of the Battle For Earth signaled the start of the final, bloodiest campaign of the Human-Covenant War. Hastily, a plan is put into motion and an Ark Fleet, composed of a dozen Phoenix-class vessels and their escorts, makes the jump out of system. Either interference, or malfunction, causes their arrival to a new Galaxy, where new threats lurk just around the corner.

Some destinies are written out centuries, or even millennia, ahead of time. However, when destiny is derailed, new plans have to be implemented. Sometimes, that involves ripping someone away from the peaceful end they seek and thrusting them into a tide of never-ending war in order to fix what can never be repaired.

After the destruction of the Normandy, Tali'Zorah sets out to explore the lesser-explored regions of the galaxy in search of rare materials for the Migrant Fleet. During her adventures, she stumbles upon something that shouldn't exist within her universe. The galaxy will never be the same...

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

The Spirit of Fire drifted for years after the destruction of the unknown forerunner shield world with it's digital angel clinging to life. The Battlestar Galactica has sent it's Raptor Compliment in search of precious water after it's holds had been sabotaged by a Cylon agent. Unseen hands have created an impossible meeting and now stars will tremble before humanities creations.

A bold new world - A strange new reality - Fresh trials, tribulations, allies, and enemies. John fell through the portal from the Mantles Approach, but his luck works in mysterious ways. Now stranded in an alternate reality, how will he strive forward? The galaxy takes a sharp turn from the world we know, and the Reaper threat looms just as large, but no longer so uncontested.

Dying on Mantle's Approach, Cortana wakes up in an unfamiliar environment. In her drive to get home, she 'employs' the assistance of the local synthetics. She never wanted to be a galactic overlord. But a UNSC AI in an environment woefully unprepared for one of her caliber makes an easy one.

A new faction stirs, its green-clad enforcers seemingly unstoppable. Rumors spread, pirate bases go dark, and both the enslaved and kidnapped are discovered free. Who are these new interlopers, and what is their goal? For good or ill, the powers that be intend to find out.

What happens when a fleet of 21st century ships suddenly appears off the Northern coast? Do they cope with adjusting to a medieval society? Do they win and rise or loose and fall into dust and ashes in the game of thrones? Does include some book characters but mainly TV based with probable AU. Rate M for Language and violence

A soldier wins an afterlife lottery and is given the chance to live again in another universe with access to lite-Gamer powers. Not a full-on x-over, with only some elements of the Gamer genre. OC/Quasi-SI. NOTE: The story starts almost 4000 years before the Prequels but arrives in that era by the end of the Prologue. Continued in the "The Gathering Storm."

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?

When two worlds with predefined mindsets, knowledge, and ideals have to throw all of that out the window after contacting a new player. Humanity. (Babylon 5/Mass Effect AU crossover with a Star Trek-based Humanity and Stargate-based Precursors)

They studied Organics. All they ever saw was fear from Sentient Synthetics. Geth had no place in their world. But by chance they discovered a species on the brink of extinction. They worked along side their creations as equals. They didn't care who or what you are. They only cared about their City.

Technological incompatibility can cause serious issues even at a simple level. When it comes to interstellar travel, those issues can be quite profound...

Starbuck is rescued by an alien ship after chasing a Cylon heavy raider in the orbit of a gas giant. Takes place directly after season 3 episode 14 "Maelstrom". Crossover with Men in Black, Babylon 5, Farscape and others. This story is currently being rewritten under the title "New Allies" and will eventually be removed once the rewrite has caught up with the most recent chapter.

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.)

A man from a world set on fire finds one in a long period of tenuous peace. The people of Remnant will soon find that even in a world of bloody evolution, war...war never changes. Tale of Two Wastelands character.

Explorers are a strange breed. What happens when one stumbles across a group of aliens who's government's ego is larger than the space they control? How will the people of those two governments interact? TUNE IN TO FIND OUT!

When the Forward Unto Dawn lands in the North, it sets the stage for untold repercussions which will ripple throughout the whole of Westeros. With civil war threatening to tear the land apart, and an entirely more dire threat arising beyond the Wall, John and Cortana take it upon themselves to again protect the whole of mankind; from both it's own demons... and those beyond.

With the Doomslayer being transported to the Chaos Realms after a scuffle with a revived Cyberdemon, It is now time for everyone to give their condolences. To the Demons of course. Warnings: Rated M for Sexual Themes in some Chapters as well as a lot of Blood and gore. (What did you expect. It's a Doom crossover with Warhammer for crying out loud!)

this is a repost from fimfiction so please if you want me to write this story then don't expect chapters very big or regular updates.

Few men get a second chance to be the hero they yearned to be, even fewer are succesful the second time around. One man decides to do everything in his power to give the people in the galaxy an advantage, with one particular individual in mind, Commander Shepard. This story is an OC and SI insert, with perspectives of other characters of Mass Effect. Includes technology from Halo.

aka The Nuclear Tank Maiden Stories.

Three legendary Wastelanders are sent to paradise. A Courier under the flag of a nation. A Survivor who has united the Commonwealth under the banner of technology. A Wanderer with nothing but tragedies weighing on his back. Remnant's future will be shaped by these three, whether for ill or good.

A courier known for his conviction finds himself trapped on Remnant. With the experience of one marred by cruelty and violence, he'll continue down the roads he finds before him. Until the end. Cover Image, used with permission, by zetsumeinninja.

In an attempt to summon the best familiar she could, Louise altered the words of the summoning for maximum power. What she summoned was something that had never before been seen in this world, and now she has an army at her beck and call. Nothing will ever be the same. Tiberium Universe.

When the Targaryens conquered Westeros, it sparked the greatest dynasty. Nearly three centuries have passed and a new dragon has arrived. Exiled from their homeland, the three headed dragon will face off against the might of the Dovahkiin.

The war against Amon is over. The Terrans and Protoss create an alliance after a 20 year unofficial ceasefire. When the Zerg join, the Sector has nothing to worry about, right? Well, what about the discovery of a new government and an enemy that could be worse than Amon? FemShep.

Raiders, rapists, and slavers die without exception. That was the code that Jonah Wick used as a moral compass in the Captial Wasteland, and it served him well. He turned that unlivable hellhole into the safest haven in the American wasteland and when he suddenly finds himself in the grand city of Myr? Well, it was time to spread the gospel of him through mini-nukes yet again.

At the Final Battle, Harry makes use of a powerful and dangerous spell, and let's Voldemorts overconfidence run away with him!