Mutant Future is, in my opinion, one of the great outcomes from the "retroclone" wave of RPGs. It combines OGL rules from older editions of D&D with post-apocalyptic influences from Gamma World and Metamorphosis Alpha. The result is different from any of those considered separately, and a working game system for "old school" post-apocalyptic adventures. I was lucky enough to grab the first free edition, which included pictures, and if the art remains anything like that, I'd recommend the paid version to anyone who feels like playing it, as it matches the style and theme of the book very well (especially the monsters, like the spidergoat or the xenocattle) and is very inspiring.