You might want to give it a miss entirely. It's apparently not made by the same company that did the original, and it's pretty crap as a result. I've only played 1 level so far, but hearing the half demon/half angel guy you're supposed to be playing saying "I love the smell of evil souls in the morning!" or "Yummy, tastes like chicken" after every 5th kill gets annoying in a hurry. Doesn't look like the weapons or enemies are up to the same standard either.
I just got a new laptop (with a geforce 8700m 2gigs of ram and the works) and Crysis runs so smooth on close to max settings. It looks and plays amazingly. I can't believe what I'm seeing sometimes. As for Hellgate London, my download from fileplanet was corrupt and i havn't tried it again yet. It looks great though. The Timeshift demo has me pumped for that as well.
I've been rockin' Team Fortress 2 non-stop! It's one of those games...the ones you get antsy about playing on the way home. Love it... Might grab COD4 if money permits this Tuesday...