How do I use a Steam gift given to me by a friend?
If you do not already have Steam, follow the link in the email you received to download and install Steam. Once you have Steam installed, you will be prompted to create an account or login to an existing Steam account. If you do not have an account, please create one. A pop-up message will notify you that you have received a gift. You must click the "activate" link in Steam in order to redeem your gift. Once you have accepted the gift, you can download the game from the "My games" list.