Anyway, Zeb Cook... Star Frontiers was a fun game, though I never gave it as much time as Top Secret or Gamma World. The Isle of Dread definitely deserves its praise. Looking at it, in 1981, that it was an almost completely open-ended, non-dungeon crawl island, was pretty ahead of its time.
Fun fact that I happened across the other day; Moldvay did the outer parts of the Isle of Dread, and Cook made the interior!