From what I have heard, the SoF download from Steam is just the same download as SoD is as far as files go. I am not really sure why it is there other than maybe as a backup download or something.
Currently, the only way to play using SoD is to register over at the PEQ website and use their private Login Server. They use the open source Login Server for their second LS connection, and that one is compatible with SoD. We are still waiting on the Public Login Server to be updated so it is compatible with SoD.
|