Re: OK WTF!
The DVD version works fine. Both my friend and I bought it, and while I had mine preloaded on my hard drive and simply activated it with the CD Key, my friend installed from the DVD. Once he installed, he logged in, Steam updated some files for 5 minutes or so, then he was off and going.
We both had to restart Steam a few times to get everything stable. Quite a few times my Sin (and my CS: Source and HL2: DM) claimed that it was either at 0% loaded or "preloaded".