If you are having issues loading a Steam game on a Windows 8 machine, please try the following:

1. Delete all previous installations of Games for Windows Live and Microsoft Games for Windows Marketplace.
2. Download the installer here.
3. Install the client and run it. If asked to download an update, choose OK.
4. Launch GFWLive.exe from: C:\Program Files (x86)\Microsoft Games for Windows - LIVE\Client.
5. Games for Windows Live should now allow you to load your Steam game!