I don't have a lot of spare time, but when I do I like something relatively uncomplicated. Graphics need not be good. I suppose what I'd really like is something like civilization I - highly addictive, being able to play half asleep, computer opponents only, and maybe turn-based. I don't want anything with a steep learning curve. It has to work on my 64bit machine. Buy, free, or whatever. Willing to pay if it fills the bill.
Thanks in advance for any help.
P.S. Don't steer me to emulators please. I've set up three of them for Civilization I, and they were all an unsatisfactory pains in the arse.