Original: A 150MB-ish demo for Penumbra developer Frictional Games' new puzzling survival horror Amnesia: The Dark Descent can now be downloaded from FileShack in Windows, Mac and Linux flavours.

The demo contains a selection of Amnesia's earlier levels, which Frictional explains it has chosen to give a good cross-section of the game. As a bonus, the sanity mechanics have apparently been cranked up so it's easier to lose your mind. Lovely!

Amnesia will be released on September 8 for $20. Pre-order from Frictional before then and it'll only cost you $18, plus you'll get a key to activate the game on Steam.

Alternatively, you can post a comment to this story for a chance to win one of five free copies. Only the first comment counts and we'll pick the winners at random on Monday.