Nice Demo, I love being able to fire a blast into the back of some unsuspecting dude's head and watch em crumple to the floor. The "bullet time" thing is awesome fun.
3.6Ghz p4
6800GT running at stock speeds
1024x768 2xAA 4xAF and all options on max except for soft shadows
The game runs fine, exept for two areas: The water room (water effects are amazing) with its reflections, and the industrial room with the streaming light coming in, and the multiple levels (the one where the ghost girl and phantom guy appear). They dont get choppy, but the framerate must get cut down into the upper 20's for me, as its not quite 30fps smooth.
I'd say the rest of the rooms run in the upper 50's or 60's. Also I get some framerate slowdown right when you are about to enter the sewer system at the beginning, I notice the framerate dipping below 30 but for the life of me I'm not sure why, not exactly alot going on in that scene...???
For laughs, I fired up the demo at 640x480 and turned on 4xaa and 4xAF, and all things considered the game still looks pretty good. A bit grainy and soft, sure, but after a few minutes I didn't really notice I wasn't running at some really high rez. High Rez is nice, but Like DOOMIII, the more visual crap they lay onto a game, the easier it is on the eyes at lower resolutions.
Still....the fact that I get even SOME slowdown at the relatively LOW 1024x768 resolution with all the eyecandy turned on is A BIT DISCONCERTING
ps: I dont mind the generic cannon-fodder guys, but the "armor plated" guys are really annoying if you dont have a grenade handy.