Currents of the Past
"Currents of the Past" is a spooky adventure set in 1901 in present-day Latvia¸ which was then part of Tsarist Russia. August Peter von Uexküll¸ a German-Baltic nobleman and inventor¸ invites the player characters to his country estate¸ where he wants to demonstrate wireless voice transmission with the help of a radio wave device. Once there¸ strange incidents occur¸ and it's up to the player characters to get to the bottom of things.
The adventure describes backgrounds¸ locations¸ NPCs and possible scenes¸ and comes with eight ready-made characters. Stats are given as % and can be easily converted to other systems. It is ideally suited for one-shots and convention games.