Hahahahaha, high system requirements? HAHAHAHAHA what do you guys EXPECT? Its 2008.
No problems with starforce for me, as long you have purchased copy.
Crysis has best graphics, extreme physics and ok storyline, just finished it yesterday.
Also if you say you cant shoot down moving aliens, thats because you cant aim, never blame it on a weapon, weapon dont fire itself and always the problem is human in this case. I can shoot down moving aliens very fine with gauss gun.
Also, DK, if you want real war, try Project Reality mod for Battlefield 2. It will turn vanilla BF2 into THE most realistic war experiences today, i always feel like im really in the war!