New answers tagged science-fiction
My very first RPG, the venerable TSR game Star Frontiers, is (legally) available for free from starfrontiers.com now. Alpha Dawn was the basic space opera game and Knight Hawks was full starship rules. Percentile based stats/skills, lots of equipment. I've also played a lot of the later TSR SF game Alternity. The fastplays are downloadable for free; the ...
This is the only one I know of that is completely free: Stars without Number This was is part of the D6 universal system. However I am adding this because the progenitor system was Star Wars The Roleplaying Game. Of all the D6 games this is the closest to the original sci-fi RPG: D6 Space
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