The community is also a great place to check out. Try these places for help from other users:
Please review the Third-Party Game Support topic to determine whether your question should be directed to the game developer or to Steam Support. Sending a support request to the wrong party may result in a delay in processing your request.
Retail CD-Keys for this game cannot be registered through Steam. If you wish to create a shortcut to this game under your Library, instructions can be found here:
You can locate the soundtrack for The Binding of Isaac in the following locations:
Note: In order to be able to access the folders where Steam exists on OSX 10.7 (Lion) please do the following:
You should now see your Library available in Finder if you click on Go > Library in the menu bar while holding down the option key.
If you have purchased The Wrath of the Lamb and are not already seeing its additional content in game, please try verifying your game cache. Then, restart Steam and launch the game again. All additional content is automatically downloaded and integrated with your game.