Damnation, Jericho, Maelstrom: The Battle for Earth Begins, Overlord & Raising Hell, Overlord 2 & Rise of the Argonauts, PC – £8.02
Registers on Steam.
To purchase digital games from Amazon US, use your UK Amazon account, and add a US billing 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.
Pretty certain these are all region free.
