I am working on a Gamma-World-esque conversion of Pathfinder for play in a post-apocalyptic, mutant-ravaged, super-science-science-fantasy game world. I realize there is a more literal conversion that has been done and is available in PDF.
I am working on something different, with more static races (which can mutate), defined classes, and a more familiar gaming context (good vs. evil, lost civilizations, powerful alien artifacts, and great evils).
If anyone is interested in collaborating/playtesting, let me know at gamma1@webtopia.com.
Thanks.