Recursivity: SimSlice is a game your Sims characters can play, a program-within-a-program. Richard Powers once told me that he was hoping to see computer program characters coding; we're on the way. Put another way, we can subsume urban design under the family and interior decorating.
"Basically, I wanted to create a game within a game, where a Sim could remain unemployed and make a living 'farming' a mini city that is complete with buildings, houses, offices, parks and even little citizens scurrying around," says Simslice designer Steve Alvey. "There had to be consequences not only for a Sim's actions but also their inactions."
Shades of Greg Egan.