The only video game I play, Cities: Skylines, is available on Amazon today for $16. This is by far the best simulation game I've ever played mostly because it's about so much more than just building a city.
Cities: Skylines has real simulation models for people who are interested in urban planning and infrastructure. The roads, bicycle paths, bus routes, and public transit systems all affect the city differently and can be programmed or laid out to great specificity. It sounds boring but it's really, really fun.
I highly recommend this game. I rate it a 9/10! Get it here before the deal expires!