Autor: J Alan Erwine

J Alan Erwine & Joshua Kviz: Ephemeris: A Science Fiction RPG

J Alan Erwine: Battle for Turtle Island: Buffalo Wars

J Alan Erwine: Derelict Ship of the Ancients: An Ephemeris RPG adventure

J Alan Erwine: Necessity’s Call: An Ephemeris RPG adventure

J Alan Erwine: Mission of Trade, or Mission of Mercy: An Ephemeris RPG adventure