We played Star Frontiers a couple of times back in the early to mid 80s but I can’t say that it left a particularly good impression, mechanically or thematically. TSR’s Gamma World was more enjoyable in terms of theme but both were clunky if I remember, as most of those early 80s rpgs were. Best space sci-fi game we found by far was the WEG D6 Star Wars - itself a reworking of the D6 Space rules - and I can see that being pretty easily reskinned to another similar setting. If you want something chunky though then why not try Starfinder?
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