I recently picked up the free, no-art version of Goblinoid Game's "Mutant Future" and I must say that I'm having fun with it. First please remember that I am relatively a kid in the Hobby having only 12 years under my belt. I missed out of the Golden Age of gaming and products like the original Gamma World (I own 2 of the 4e box-sets which often get brought out as a party game) and have since really only been involved in the traditional fantasy branch of the hobby (seriously, anyone have a good space opera game going?). So finding this (oddly enough thanks to Knotty Works) produced a mild happy dance from me.
As many of my readers know from the various Usarm games I enjoy a certain level of Science Fantasy. Since coming into the hobby I've hunted down and obtained a copy of Expedition to the Barrier Peaks ... then since I only knew 3e at the time got completely lost ... and have often used golems as stand-ins for ancient robots.
I'm on my second read-through now and am hoping to gain a good idea of the game before the weekend's out. Possibly enough to run a breakfast club one-shot down the road!
Note - I will say this has reminded me that I still have a long way to go before descending AC feels natural to me.