Summary: I have played these on my 360, but saw these PC versions for cheap. Regrettably I do not have a powerful enough video card to play this on high settings. Maybe one day I'll build a faster rig.
Summary: I had trouble installing and playing it in Window 7 for few days. After researching online and download the patch 1.1 for Crysis & Crysis Warhead, the game seems to be stable and I was able to finish to the end. Good game, I love it.