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I am thinking of buying episode one off ebay, since steam's site does not accept paypal.
I was wondering if you need to insert a CD while validating the product key, because this was the case with HL2. Im not interested in getting anything shipped or to buy it in stores, since its cheaper, and more comfortable to just download it...however I need to know if its enough to insert a cd-key for activation, or if it asks for the CD to be inserted as well. Thanks.