After a deadly attack of seemingly unknown origins, Luna and Celestia begin talks of reviving an ancient order meant to defend Equestria and the rest of the known world from threats deemed 'other worldly'.
Crossover between XCOM: Enemy Unknown and MLP. Twilight appears on Earth, shortly after the alien war. How will she cope with being taken prisoner? How will XCOM cope with the single most powerful psion they've ever encountered?
A string of mysterious abductions reveal a sinister plot threatening all of Equestria. To combat the extraterrestrial menace, Luna and the Elements of harmony set up a secret military force: the X-com initiative
An experianced XCOM squad is sent to Equetria, but they aren't the only ones. Humans will have to work with ponies if they want any hope of tracking down the escaped aliens, and more importantly, getting home.
After the defeat of the Uber-Ethereal , the psionic volunteer fails to stop the black hole of the capital ship from opening, and only manages the divert it into a worm hole, before the ship explodes. But as worm holes go, they have to lead somewhere.
The Volunteer, the savior of humanity and one of the men and women who ended the Ethereal War. He gave his life for Earth and its people, but what he faced after death was just the start of yet another brutal war on a new world.
(XCOM: Enemy Unknown/Within crossover) An XCOM squad ends up in Equestria after trying to disable an alien battleship, only to find that Earth isn't the only world under attack.
When a space warp throws a hard-bitten X-COM Colonel and his squad into Equestria, they find a war weirder than they ever could have imagined. But it still might need them.