I'm loving this game, I'm completely addicted ... and I want to contribute information about the games.
I have a Core i3 3250 3.5GHz, 8GB DDR3 1680MHz RAM and a GTX 750 TI BIOS MOD. I know my processing power is meager, but it should be possible to further improve game performance as it is new. I'm having some minor laughs with stutterings, this should be easily solved with a few more optimizations.
I have another problem with the game, after several hours playing, when I decide to close the game, I realize that it is still open in the Windows task manager.