you can buy it through steam, no hard copy of CD/DVD though, Ofcourse its worth buying....though the DRM feature makes it a bit unattractive still...........
although the game was short ..i totally enjoyed it..the presentation was much better with psycho and it was gripping till the end..and after u have finished tha game one u can always load u fav levels and try to do them differently and there is a lot of hrs of game play in there.
Done with that there is crysis wars..right now i dont find a lot of ppl playing instant action..but yeh the play power struggle ..i suck at power struggle