Battle at the Ziggurat -- David Menehan's cover for Prime Directive: The Star Fleet Universe Role-Playing Game, by Task Force Games, designed by Timothy D Olsen and Mark Costello (1993).
Prime Directive obviously is a Star Trek RPG, but one that does not mention "Star Trek" by name. It was published under the same license as Star Fleet Battles, granted to Stephen V Cole's Amarillo Design Bureau in the late 1970s by Franz Joseph, creator of the 1975 Star Fleet Technical Manual.
Like Star Fleet Battles, Prime Directive is focused on military actions. Player characters are members of a Federation Prime Team, an elite special forces unit assigned to the most dangerous missions.
Prime Directive describes a United Federation of Planets, phasers, and Vulcans, but you won't find Kirk or the Enterprise in this book, even in its detailed Star Fleet Universe Timeline. For that you need Star Trek: The Role Playing Game by FASA (1982-89), based directly on the original series, animated series, and first movie.
From Prime Directive:












