What year was the role-playing game, which is a supplement for another game by the same Michigan-based company, released?
Truckin' Turtles:  It was published by Palladium Books in 1989 and uses the Palladium Megaversal system. Palladium Books: Palladium Books is a publisher of role-playing games (RPGs) perhaps best known for its popular, expansive "Rifts" series (1990–present).
i don't know