This has been around for a while now, but it's not getting blocked by my anti-virus this time. Played a few minutes of it and it's a bit like Half-Life crossed with Resident Evil. Seems pretty decent. Used to be a commercial game, but now it's been officially released for free. It'd be rude to say no, really.
Just make sure you don't tick the boxes for 3D sound and EAX when the config box comes up; I had no sound effects and it took me having to go into the registry to get the box back up. Also it seems to be a bit finicky about starting up. Just keep clicking the .exe until something happens. [Download Here]
*edit* Ooh, it's pretty good. More like Half-Life/Silent Hill
. Sure the graphics are very PS2, but there's already been a few "What the fuck?!" moments and I don't get spooked often by video games.