GURPS Prime Directive

GURPS Prime Directive is a sourcebook for "GURPS", first published in 2002. It is named after the Prime Directive in "Star Trek", the universe it adapts. It spawned several associated sourcebooks.
Contents.
"GURPS Prime Directive" allows players to play virtually any type character they wished, and also allowed some cross-genre moves to be made, and to include some limited elements of the "Traveller" Universe.
Publication history.
After the folding of Task Force Games and the cancellation of the original "Prime Directive" line, Amarillo Design Bureau, Inc., the new publishers of Star Fleet Universe games, were left with the question of what to do with "PD". They were primarily a wargame company, and the poor sales of the supplements were cause for a reexamination. Eventually, they approached Steve Jackson Games to utilize the "Powered by GURPS" format.
"GURPS Prime Directive", as a "Powered by "GURPS"" book line, appeared in 2002 and was licensed for publication by Amarillo Design Bureau to portray the world of "Star Fleet Battles". Task Force Games produced "GURPS Prime Directive" for third-edition "GURPS" (2000) and "GURPS Prime Directive" for fourth-edition "GURPS" (2004). Amarillo Design Bureau continued to publish their Prime Directive books for "GURPS", "d20", and "d20 Modern".
Originally "GURPS Prime Directive", the "GURPS Klingons" imperial source book and "GURPS Module Prime Alpha" module were released under the third edition of "GURPS". The new fourth edition of "GURPS" prompted a rework of the previous major books ("GPD" and "GK") and a delay of the (then) upcoming "Romulans" sourcebook (which became one of the first 4th Edition "GURPS" supplements). "Module Prime Alpha" (and its intended sequel, "Module Prime Beta") were dropped from the line, due to poor sales.
The following "GURPS" 4th Edition books were released aside from the core rulebook, "GURPS Klingons", "GURPS Romulans" and "GURPS Federation" have been released for this new system.
Books.
Additional books produced as a subseries of PD include: