Game Dev Tycoon™ is a business simulation game for Windows 8. In Game Dev Tycoon you replay the history of the gaming industry by starting your own video game development company in the 80s. Create best selling games. Research new technologies and invent new game types. Become the leader of the market and gain worldwide fans.
It’s running on Linux and Mac OS X as well, I hear. Though I guess there are some bugs left to iron out on those platforms, which I wish good luck with.