Frictional Games, the developer of the well known Linux game Penumbra has released a moody teaser trailer with several minutes of gameplay from its latest survival horror game, Amnesia: The Dark Descent

Amnesia: The Dark Descent is estimated to be released in August 2010, both online and as a boxed game for retail. Pre-order the online version for $16, saving 20% on the release price of $20. Pre-orders in the Frictional Games Store will give you access to Windows, Mac & Linux on release