I am running Vista 64 bit SP1 and I bought this game today on the White Label budget range.

The game installed fine and afterwards Steam popped up so I tried to enter in my CD key, on the inside of the case. Steam doesn't recognise it, which is a bit of a kick in the nuts as I mostly bought this game for MP.

Undettered I decided to try the singleplay while I waited for Steam to reply to my e-mail, only to find I can't get to the title screen. The opening credits and cinematic plays, and then, nothing happens, I just get a bit of loading, and a black screen.

Damn.

See Dark Messiah Installation and Troubleshooting Instructions thread...