Welcome to ERF

From publisher blurb: Enceladus Research Facility sits at the south pole of Saturn's ice moon. But it conceals a mind-bending secret that will change your crew - and possibly all of humanity - forever. "Welcome to ERF" is a short pamphlet-formatted supplement containing a new mechanic for the influence of a powerful eldritch presence, 10 monsters, an NPC generator, a keyed map for an underground adventure location, and more.