The Frictional Games Blog has a postmortem on Amnesia: Dark Descent, the horror game that was first released a little over two years ago (thanks Joao). They explain why they can only estimate how many copies they've sold at around a million, and how they are still managing to sell about 10,000 copies per month. They estimate the game cost $360K to make, and has since earned ten times that amount, prompting them to offer this perspective on piracy: "It has been over a year since we even thought about piracy. With sales as good as above we cannot really see this as an issue worth more than two lines in this post, so screw it."