I bot SF when it came out, but I don't know if Gamma World, Aftermath, Morrow Project, FASA's Star Trek or Timelords were earlier or later... all were played. I liked the maps and chits (minis came later). I liked the variety of aliens (yet not the insanity of Gamma World 1e). I loved the fact they got a workable, fun space battle system in Knight Hawks. (Note Traveller after 45 years still has only a couple of half-way tactical boardgames that integrated player skills - Mayday and Brilliant Lances - and neither was very complete for the game setting...)Star Frontiers was my second space-faring sci-fi RPG, as well (Star Wars D6 beat it out). It's a great game. I sincerely hope that those people over at nuTSR don't forever tarnish it.
Fond memories of Star Frontiers. Now days, it'd be Scum & Villainy, D20 SW (not because it is better than the new SWs RPG, but because I went so deep in D20 SW, Traveller, or High Colonies if not trying home brew rules.