If you missed the Amnesia Collection when it was going for free earlier this year, now is your second chance.
Usually $US34.99 ($45), you can grab the collection for free over on the Steam pages for Amnesia: The Dark Descent and Amnesia: A Machine For Pigs for a limited time. Exactly how limited hasn't been specified, so if you're interested you'd better get on it.
Nabbing the collection will net you both games, so don't worry about visiting both pages. However, be careful to click "Install Game" rather than adding the collection to your cart, lest you end up needlessly spending $45.
Personally, I'm still too scared to play either game, and I don't expect that to change any time soon. But The Dark Descent did give us one of my favourite gaming videos of all time, and for that I will forever be grateful.
That is not traditional fire.