Amazon has recently begun distributing video games for download.
 Purchase games from Amazon.com from any country
To purchase digital games from Amazon US, use your UK Amazon account, and add a US delivery address to your account. This address needs to be a valid US address, but nothing will be sent there, and you can access all your games through their website. Some card issuers may charge a fee.
Use an address in a state which does not require sales tax. For example:
Delaware Mailboxes, LLC 1400 Peoples Plaza Suite 104 Newark, DE 19702 302.292.2502 - Phone