What year was the role-playing game, which is a supplement for another game by the same Michigan-based company, released?
Palladium Books: Palladium Books is a publisher of role-playing games (RPGs) perhaps best known for its popular, expansive "Rifts" series (1990–present). Palladium Books:  Palladium was founded April 1981 in Detroit, Michigan by current president and lead game designer Kevin Siembieda, and is now based in Westland, Michigan.
i don't know