I still play the WEG d6 version on occasion. I made the mistake of getting rid of a lot of my book, but found the 2nd edition Revised and Expanded on eBay for about $10, so I now have it again.
Most recently, I ran an adventure (Escape from Echo Base) using the d6 rules at Gen Con last year. It was a blast!
I would certainly consider playing or running a campaign of this system again. It's easy to learn and plays fast.
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