Thanks for letting me know about Pripyat. I think I found how to change BC2 in the config file. I still don't anyway to confirm it.
I almost bought Metro 2033 before, so I may get it now with my new card. I remember reading good things about it, but I also read that it involved a lot of wandering around. I'm already having a hard time getting into Pripyat since there is so much wandering involved, so I don't know. I liked the sound of Civilization V, but I don't know if it will stress the card. I'll try the Hunter game suggested.