If you want to own the Amnesia games on Steam, here's your chance:

http://store.steampowered.com/app/57300/Amnesia_The_Dark_Descent/

Note: Don't add anything to your cart. Click "Install Game" instead.

With this and the recent Humble Bundle giveaway, Frictional Games is creeping back into public consciousness. They're working on two projects right now; maybe one will be revealed in the not-too-distant future?

Nice catch. Any idea how long they're free for? The news post is pretty vague.

For those who haven't seen it, here's the Steam news post:

http://store.steampowered.com/news/37969/

Edit: Whoops, that was the wrong link... fixed now.

These kinds of promotions usually run for 48 hours. Why the news post is so coy about it, I couldn't say.

Got it. Even though I've owned the CD of the base game for quite some time.

Maybe whoever put it up had Amnesia.