I got it.

I have to admit it is very good, and quite scary.

The Imps are very tough and fast but I am slowly getting the hang of them. But more than this tis the zombies that annoy me. After having a bunch of them jump up from what I presumed to be dead bodies, I now make a point of shooting every body in the head once with the pistol... Thats normally good enough to find out if they are a zombie or not!

The whispering was freaky, when I arrived in the darkened living-room with a pentangle in the middle it (looking for the PDA for Alpha Labs) it really freaked me out hearing the voice and the lights going out yet again.

It is good, even if the gameplay does get rather samey (but then you always get that with an FPS)