Sales for PC horror game Amnesia: The Dark Descent are still going fairly strong, even two years after launch.
Developer Frictional Games says even now, over 10,000 copies of the game are being sold at full price every month; in total and including Humble Indie Bundle sales, it sits at an estimated 1.4 million units, and excluding any redundancies with HIB sales, it sits at about one million.
To put that in perspective, the title cost $360,000 to make, meaning it has made the studio more than 10 times its cost. "Take that, investors we talked to in 2009!" they write.
The success, they say, is down to the uniquess of Amnesia and its position in PC gaming, the large modding community, and also user promotion via YouTube clips. I'd also say its reputation as being actually scary in a world full of pretty tame horror games helps a lot, too.
After Amnesia: A Machine for Pigs launches, Frictional will be hard at work on its next first person horror project, which they say will offer a "deeper theme".