I had it on 1024x768 with a 16mb TnT2 card and it ran smoothly almost all the time. The 3d lanscape is in most palces very realistic, and invisible zones prevent you looking at a black edge. It sort of fades out. Gore is realistic. I don't glamorize war.
War is most brutal and violent.
Gore can be turned off if neccessary. The soldier literally fell apart, as he would if a grenade fell on him in reality. It's not as violent as Soldier of Fortune, but it is close in some aspects. So be careful how deep you go. The terrain can be very hazardous.