CityOne is much like Sim City, only the problems are scarily real, ranging among energy, water, banking, and retail. So, for example, one day you might get hit by a rapid increase in water usage due to population growth—while you’re still losing 40% of your water supply to leaky pipes. To fix that problem, you’ll have to carefully install a real-time water management system. Or, to encourage growth in small-businesses, you’ll have to set up an infrastructure of mobile payments, dynamic invoicing, and micro-lending. Clear your Friday night schedule.