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Jean Sexton. Prime Directive: Roleplaying in the Star Fleet Universe, Revised Edition for GURPS 4th Edition. Additional material by Stephen V. Cole, Matthew Francois, Loren Knight, Jean Sexton, and Alex Chabot. Cover by Dennis Calero. Illustrations by Peter Bakija, Alvin Bellflower, Dennis Calero, Stephen V. Cole, Mark Evans, Xander Fulton, James Gammell, Ted Geibel, Robert Hubby, Kent Ing, Loren Knight, Matthew Lawson, Kenneth Mayfield, Will McCammon, Jim McGonigle, Dale McKee, Barton Pyle, Adam Turner, and Steve Zamboni. Deck plans by Nick Blank. GURPS System Design by Steve Jackson. GURPS Line Editor Sean "Dr. Kromm" Punch. SJ Games Playtest Review by Robert Gilson. Some background elements originally created for the first edition of Prime Directive by Timothy Olsen and Mark Costello. Amarillo Design Bureau, Inc. 14 February 2020.