4 ms·I believe it wasn't ever, but there were paper adaptations that used GURPS as the base.by drbig 2y agoI believe it wasn't ever, but there were paper adaptations that used GURPS as the base.thenipper 2y agoFrom what I recall is it was then they lost the license so they make SPECIALthenipper 2y agoDid some digging and found this: https://www.enworld.org/threads/the-rpg-origins-of-fallout-part-2-gurps.663838/ https://www.enworld.org/threads/the-rpg-origins-of-fallout-p...