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'.
(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.
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?