Ladies and gentlemen, boys and girls, I give you . . .
This little beauty had it all (except starships). That cover tells you everything you need to know. Of course, it wasn't a perfect design, but it was fun. It had that lightning-in-a-bottle of OD&D. Just enough of a framework to hang your own adventures and house rules on.
Then, along came . . .
Knight Hawks actually has a nice physics model under the hood. Not perfect, it is science fiction, but the rules for starship movement are pretty well thought-out. A real surprise given the general aura of "thrown together" that surrounds these two games. There has never been any doubt that everything in the TSR stable took a back seat to D&D, so to discover that these two titles actually comprised a good, consistent, fun gaming experience proved a very pleasant surprise.
They are still available, and free, at Starfrontiersman.com. Also available at that site is Starfrontiersman, a free fan e-zine. It looks pretty good, with 17 issues for free download, the most recent being from October 2011.