I've just bought penumbra series from steam but can't play

[jens]

If you go back a few years, it was possible to use different color depths for your desktop. You could run 8, 16 or 24 bit. Normally this option is not configurable these days, it always runs in 24 bit. So I was asking if you possibly had configured running in 16 bit and this could possibly be the cause of the problem.