Coldheart Canyon

From publisher blurb:

Coldheart Canyon is heavily inspired by John Carpenter's "not western westerns", especially Ghosts of Mars; any similarity is not a coincidence but an homage! The adventure is meant to be played as a one-shot, taking place over a single night, from dusk to dawn.

The party arrives at a small forsaken town in the desert; they are beaten from the arduous voyage and in need of some respite, but what they find is a ghost town. Dudleytown appears empty at first, it seems like everybody has just vanished. Slowly the horrifying truth starts to be revealed. In the canyon, nearby miners have awakened an ancient alien force, that ravenously spread across town. There will be no rest tonight!