Frictional Games has released the Linux and Mac version of the Penumbra: Black Plague demo, as well as an updated Penumbra: Overture demo. The new Overture demo includes optimisations from Black Plague as well as rendering fixes for ATI cards.

Penumbra: Overture Demo for Linux (113.15MB)

Penumbra: Overture v1.0.3 Demo for Mac (128.52MB)

Penumbra: Black Plague Demo for Linux (123.65MB)

Penumbra: Black Plague v1.0.1 Demo for Mac (147.83MB)