Having purchased a retail version of Half Life 2, I successfully installed, registered on steam and played it for some time.
However, I had to reformat my HD at some point. Unfortunately, I lost my password, and the answer to the secret question that is necessary to reset the password. All other account information - cd key, account email address, account name is in good standing.
I tried emailing email@example.com
- so that they would reset the password and email it to me - nothing after three weeks now.
I filled a support ticket at steampowered.com, also nothing after two weeks.
I called Sierra support, and the the guy told me, I may have to exchange cd sets, so I can re-register with steam.
Overall it is a bad experience, of taking customer's money and being unable to do so something basic as to completely reset the password and email it to him!