The war for Earth is over, the Elders and Advent have been defeated. As Alpha Squad, the best XCom has, begins to settle into a new life of peace, their lives are thrown astray as a mission to find an old friend gets FUBAR. Now, thrown into a world new to them, they must adapt to survive... the high school classroom as teachers.

"Lily" Shen An-Yi is a child prodigy who has been the XCOM Chief Engineer since her father - Dr. Raymond Shen has gone because of the alien occupation. In a hopeless situation which XCOM is left decimated again and Earth is still controlled by the Elders through the puppet ADVENT Administration, Lily Shen makes a contract with an alien called Kyubey and became a Magical Girl.

In addition to the Ethereal Device, XCOM also recovered a device akin to a gateway/portal. Meanwhile, in a different universe, Prophet is caught the feedback reaction from destroying the Ceph wormhole.

The X-Com Troops deal with the actions of the Sectoids to save the Asgard Species from extinction while the Daleks invade the Stargate Universe against both sides!

The Elder's last hope, the Exodus, was launched during XCOM's final assault on the underwater fortress. The last Ethereal and Avatar, designated as Noah, had to led the crew of the Exodus to find new allies. But they did not expect who and what they will meet in this Kropulu Sector.

What happens when a part of Maggie's past comes searching for her? A part whose job is to wage war against superior alien invaders and their monsters? X-COM side combined with Xenonauts.

The Alien Invasion is over, the world began to rebuild what was lost, peace is restored. Yet wary of the stars, the people of the world will know that their planet held secrets of its own than the stars above. XCOM will once again, dive to the unknown.

Перевод XSGCOM: Mirror Image. Ссылка на оригинал: fanfiction .net /s/3631062/1/XSGCOM Mirror Image.

The year 2015 was when everything changed, when machines descended from the sky and rained death down on the Earth. They thought that we would be easy to conquer, to destroy, they were wrong. The XCOM Project has been officially activated. Good luck Commander.

The world is undergoing unprecedented change. It is a time of progress, prosperity and blinding achievement, coupled with dire poverty and a world under pressure from internal struggles. So, no wonder everyone thought the chances of something coming from Mars were a million to one

AU. What has three fronts, one overt, one covert and one within? A war against alien invasions. When 5 university students stumble upon a gun fight, and contaminated with alien nanites, they soon find themselves under the auspice of an agency tasked to defend the world from alien threats. With escalating conflict abound, their newfound powers are the only key to winning the war.

Against the full might of the horny Manono forces, the alluring wills of aroused old gods, and cheap Lovecraftian shout-outs lay a jaded, battle-hardened, and stretched thin XCOM and the Resistance. Join a beleaguered fireteam and the hypocritical team leader as they try to survive the Northern Quarantine Zone with their balls, freedom and sanity intact.

The obligatory Mass Effect-XCOM crossover, just set a little earlier than most. The Migrant Fleet is looking for new worlds, new tech, new allies. Humanity would very much like to not be exterminated by aliens from beyond the stars. SYNERGY!

ADVENT has been gone for ten years. In that time, the commander had gotten married, had three kids, and got things as close to what they were before the invasion as possible. But what happens when a new foe appears and tries to destroy it all? Thus, XCOM fought.

A simple recon mission for XCOM operative Faith Connors

You tell someone from 2015 that aliens will rule the world by 2016, they'll call you a liar. You tell someone from 2020 that XCOM will rise up to fight said aliens, they'll call you a liar. You tell XCOM that a bunch of teenagers are gonna be their only hope of survival, they'll most likely shoot you after calling you a liar.

The dominion has stood strong for centuries since the Ethereal war, under the guidance of the Emperor the Terrans have risen beyond the wildest of dreams, what happens when they encounter the a race of council exiles in desperate need.

The sequel to XCOM: RWBY Within. Teams RWBY and JNPR return to Remnant in time for the Vytal Festival. They're relieved to finally have their lives get back to normal after nine months on war-torn Earth, but is the life of a huntsman ever truly normal?

A secre from his mother’s past leads Lelouch into a battle against not only Britannia, but a threat from beyond Earth. Can Zero defeat both foes?

This started out as a gag about various short scenarios that kinda escalated into a story thanks to an idea that one of us on the Discord server had. (Under Rewrite)

The Lone Wanderer had protected the Capital Wasteland from as much as he could. But even he has his work cut out for him when it comes to a force from another world. Fortunately, he finds a new ally in this trying time. Patreon sponsored one-shot

A very salty guy gets sent into the Dreamworks' She-ra verse and has the body of an X-com avatar with all the psychic shennanigans that it entails. Also will have lemons eventually. Do not read unless you want to have a headache.

Dr Tygan has, on the orders of the Commander, been studying an orb of some kind that appeared out of nowhere in the North American region. This orb happens to be a gateway to another dimension and some of its inhabitants have been dumped into the year 2035 on a world run by aliens. These adventurers are not prepared for XCOM's method of war or its attitude to non-humans.

Vahlen's gotten her hands on a machine that selectively alters reality to a relative normal. How bad is Bradford going to freak out, and how much havoc will XCOM's soldiers wreck on the Avenger?

X-Com, Mass Effect Crossover, Space Engineers elements. As Humanity pushes off the Ethereal threat a cycle continues, while a vast, unknown Galactic Civilization lives right upon its borders, bringing with it possible friends, or foes.