Star Frontiers is available online. Usually when things like this become available you get some free rules and maybe....maybe an adventure or two. Star Frontiers (.com) has a ton of free goodies to include:
Rules (pretty much all of them)
I really don't know a lot of folks that have played Star Frontiers back when it came out in the early 80's. I got to play this game somewhat by accident. I really wanted to get my own copy of AD&D, but the closest I could do is play a bit with my uncle when we visited (which thankfully was often). At the time my family were members of a Mennonite church and every year before Christmas the preacher would announce a long list of "unsuitable" and "violent" toys that parishioners should not purchase for their children. Dungeons & Dragons was high up on that list......
.....but Star Frontiers was not on the list.
While I didn't get my AD&D, I did get this weird Sci-Fi game that came with two d10's and a couple of crayons. I lived in a very small rural town in Iowa that made getting together to play nearly impossible, but my 8th grade study hall teacher did let me start up a game during first period. That game only made it a week or two, but only because it proved to be too popular. Too many students would rather watch my group play than do their busywork.
Someday I hope to be able to run me some Star Frontiers as an alternative system for my group...or maybe a one-off or two at a convention.
Now if you aren't all too interested in playing Star Frontiers as an RPG, you might still be interested in Quest adventures, which are basically the Choose-Your-Own-Adventure (called Endless Quest™) books converted into HTML.
trying out the
Not a bad way to spend a few hours...assuming your character can live that long.