I bought the PC version , played it for practically 4 hours straight :| , but bloody hell it's good fun. the weapons especially have a nice kick to them. I recommend this, atmos, few good zero G physics puzzles, dismemberment and all around upgrade goodness, oh and some sick player death sequences!.
I got raped by the big guy that won't ever die, and it was like he performed a fatality combo on poor isac or something i.e. it was pretty insane.
Can someone who has the PC version tell me if you can change the controls. I've heard you can't reconfigure them so you have to use WASD instead of the arrow keys. Oh and is it a demanding game specs wise, i only got a weak 8600GT.