Penumbra

Go play this game right now.  It's great.  That is all.

Maybe some screen shots? I tried Wikipedia but it gave me nothing.

Quick search with google image search.
Not sure if these are the right ones for the game, Bio says is great.

meh

If I remember correctly, this is the game that has a fully-interactive environment.

For example, you can pick up and use everything you see as a tool or weapon, and there are puzzles similar to those "Trapped In A Room" flash things that were popular a few years ago. This time, though, they're fully rendered.

If it is, screen shots don't do it justice. You just have to play it. I played the demo a year or two ago.

Yeah, like to open a door you put your hand over it and move the mouse to push it open, or to pull down levers, etc.  To swing a weapon, you ready it in a random position, then you swing the mouse in the right direction to hit with it.  It's a great horror game.  Also, have a torrent for it.  It's fairly small, and the torrent works perfectly for me.
http://www.mininova.org/tor/665750

Black Plauge > Overture

http://www.penumbra-overture.com/index.php

Is black plague out?

the gameplay footage looks amazing, I'm definitely trying this one out.

Is black plague out?

Been out for like, 10 months.

Beaten both of them.

I'll have to get it after I beat overture.

Also enjoy having no weapons in the second game.

Makes it better, believe me. More thought goes into the monsters and bosses, how to get around them, ect