I picked up Ziggurat dirt cheap on a steam sale once and it stayed untouched for a long time. A couple of months ago I got an itch for roguelikes and finally dug it up, remembering that Jeff really liked it. And, man, that's a super fun game. I still haven't unlocked everything, but I'm not planning to leave it until I do. A perfect game to have around and make a run or two every once in a while.