In the scenario book Petersen’s Abominations for Call of Cthulhu 7th edition, there is a chilling scenario called Panacea that involves characters, each for their own reasons, investigating a strange medical corporation ZyMedBio. This company seems to have produced a miracle cure; but if it sounds too good to be true, it probably is.
Throughout the scenario, the investigators are taunted by a strange digital voice, bringing up painful parts of their history or offering them salvation. Keepers can now play these free downloadable audio clips from a nearby speaker as the investigators get deeper and deeper in the scenario, keeping the players on their toes. Who is this voice, where is it coming from? And how does it know so much?