Gamma World

I haven't played GW in years. I remember having an enormously fun time with it when I was younger, though I was only in one or two campaigns. The premise of the game is that you're on Earth in the year 2500 or so, but after a pretty humongous war has destroyed civilization as we know it, and created millions of mutants. Characters got random mutations (I seem to remember my character having a lobster's claw for his right arm, and could emit high radiation, or something) and had to eke out an existence in a barren wasteland and deal with the remnants and destruction left behind by their ancestors.

I don't think I'd enjoy it now. It tried to be too many things, and as a result lost its focus. I think I'd want to keep the random mutations, in some ways, and it might be fun for a rollicking one-shot (like the TMNT game I rave about elsewhere), but I would hate to be a GM saddled with a randomized wasteland as a long-term campaign setting.