Frictional Games (developers of Amnesia: The Dark Descent) and The Chinese Room (developers of Dear Esther) are jointly working on a sequel of Amnesia named A Machine For Pigs.
About the game:
The year is 1899. Wealthy industrialist Oswald Mandus has returned home from a disastrous expedition to Mexico, which has ended in tragedy. Wracked by fever, haunted by dreams of a dark machine, he recovers consciousness in his own bed, with no idea of how much time has passed since his last memory. As he struggles to his feet, somewhere beneath him, an engine splutters, coughs, roars into life.
Frictional Games has been teasing us with some clues and hints about the sequel in past and now finally they have released a new teaser for the game.
The game will be supported on Linux.