I got Fallout 3: GOTYE with the QuakeCon pack and when I installed it and ran it for the first time it had 4 instillation steps to preform. There was an error on the forth one. I think it had to do with .net but I'm not sure. Now when I have it start a game it starts to load it but before the screen does anything it just hangs and stays black. I also tried deleting local content and reinstalling but it did not work.
More aboutfallout gotye steam hangs starting
Try updating .net?
I ran Windows Update (Win7 Pro, 64-bit) and there was one .net update. Tried the game again and still nothing. Is there a .net update I need to find and download manually?
Valve replied to my support ticket. One of the links they provided solved it.