This video has some really nice ideas for making cheap terrain for Star Wars Legion and other science fiction games.
science fiction
Ares Magazine 12 – Star Trader Board Game
Issue 12 of Ares Magazine (January 1982) featured a complete board game called Star Trader, The Game of Intestellar Exploitation and Piracy. The board looks really neat.
One Page 40K Rules
One Page 40K Rules are a set of simple rules for the 40K Universe. The authors write:
One Page 40k is a single-page ruleset designed to be fast to learn and simple to play. It serves as a great introduction to the Warhammer 40.000 universe for people who are new to the game, and as a way to play quick games for veterans of the franchise.
Ares Magazine 11 – Albion Land of Faerie
The internet archive has a digital copy of the old SPI science fiction and fantasy gaming magazine Ares. Issue #11 features a full board game called “Albion Land of Faerie.”
Fast and Dirty Sci Fi Rules
Looking for an alternative to Warhammer 40K? Who isn’t? This may be it. Even better: these wargames rules are free. Ivan Sorensen’s Fast and Dirty rules also would work for modern combat.