Just wanted to let you all know that Civilization 5 works just fine for me in Directx9 under Ubuntu 10.04LTS 64bit. - sudo apt-get install wine ( running wine-1.1.42 ) - downloaded steam from their website - bought and installed civ5 on steam - installed directx 9 to wine using winetricks ( google this if you need ) - started civilization5.exe ( not the dx11 executable but the dx9 one ) Played 14 hours straight :) No crash, no lag. Enjoy !