I've been going through all of the forum post but I have been unsuccessful in finding someone with a similar issue and solution. Today i purchased Defense Grid Gold on Impluse. The game loads fine but as soon as I start a mission the map displays as a gray screen. I can move my mouse I can see subtitles. Only the map is gray. I saw similar post that talked about a patch but I can't seem to locate a patch that will work. Please help.