are there any x file au fics out there? thank you.
Try the Horror AUs for more along those lines, but the only actual X-files AUs I know of are:
THE TRUTH IS THAT LEAVING COMMENTS AND KUDOS SHOULD NOT BE ALIEN TO YOU!
Their Truth is Out There by @winterstar95:
Three years ago Tony Stark was one of the top agents for the FBI.
Medals, success, and a bright future – everyone thought he would be the
next director of the agency. Plus, he was in a wonderful relationship
with one of the up and coming agents, a former army Captain, Steve
Rogers. That was before the abduction, before he nearly died and came
back to the world with an alien device implanted in his chest and a
story no one would believe. He lost his position and his love. One day
he’ll find a way to get his life back, because he knows the truth is out
Once Upon a Time by snowynight:
Mulder and Scully go to a town to investigate a brutal murder, and find
that there’re more of the sheriff and his lover to the eye.
But you may also like:
Comfort, Truth, Joy (the Mountains of Madness Remix) by @cptxrogers:
A mysterious signal is emanating from deep within Antarctica, and Steve
and Tony set out to investigate. If they can make it through the
freezing temperatures and the deadly ice fields, something even stranger
awaits them deep in the antarctic mountains.