Thank you for your recent purchase on Steam.
If you’re new to Steam, install the free Steam application now:
http://www.steampowered.com/getsteam
To play your new games, just launch the Steam application on your computer and log in using your Steam account name: 90324199xz. Your games will be available in Steam on the “Library” tab.
Any Downloadable Content (DLC) you've purchased is automatically downloaded and will be accessible from within the base game on Steam. To view your new DLC from within your Library, right-click on the base game and select “View Downloadable Content.”