The game released today for PC, but is coming soon for Mac. It's out on Steam as well. Does anyone have experience with Civ on Steam? More importantly; if you purchase a windows version of Civ on Steam if and when the game releases Mac side on Steam do they allow access to it as well, or do you have to purchase again for the Steam Mac client of the game? I was thinking about buying this as I'm a huge Civ fan, but really don't want to be switching to Windows every time I play it as Civ games tend to last me for years.