THE EVIL MAY HIDE THE GREATER EVIL. BUT THE EVIL ALSO HIDES THE GREATER GOOD. THIS WORLD IS A MACHINE. A MACHINE FOR PIGS. FIT ONLY FOR THE SLAUGHTERING OF PIGS.
http://www.nextfrictionalgame.com/
A new game by the company that made Penumbra and Amnesia. Speculated release date of Fall 2012. There's this whole ARG thing about the game so far, there's a thread on the developer's site about it. Here's a wiki with all the stuff about the ARG so far.
Looks to be a sequel to Amnesia, or it has something to do with it. It also seems to be that Frictional is working with the developers of Dear Esther, a very popular mod for HL2.