UPDATE 2/22:
Frictional has officially unveiled their new game, and it's a sequel to their surprise hit Amnesia: The Dark Descent. Subtitled A Machine For Pigs, the announcement was made during an interview with Joystiq.
It should arrive on PC during 2012, and the game will be developed by thechineseroom. "It's not a direct sequel, in terms of it doesn't follow on from the story of Amnesia," says writer Dan Pinchbeck. The new game will be set in 1899, and follows an industrialist that returns from an ill-fated expedition to Mexico.
ORIGINAL STORY:
If you played Frictional Games' surprise hit Amnesia: The Dark Descent, we hope you've emerged from that fetal position by now. If you have, you'll be pleased (or terrified) to learn that the developers apparently have something else up their sleeves.
A new teaser site (found at nextfrictionalgame.com) doesn't say much, but the Amnesia mention makes us wonder if it's a full-on sequel. Interestingly, if you click on the image, it takes you to this Google map of China. No hints regarding what that's about, but we're curious to see what the studio has in store next.