Shifting Textures and Opaque windows in Penumbra-black plague

[Thomas]

"I bought the game on steam"
The game is on steam now!? I did not know that...

The game has been tested on new Radeon (have a Radeon HD myself) and it should work. Could you locate "hpl.log", it should be in "My Documents/Penumbra/Black Plague" and copy the contents here and I will see if something can be spotted.

As for refund, you need to contact the steam support for that.