Deadlight, Insanely Twisted Shadow Planet, Iron Brigade, Mark of the Ninja & Toy Soldiers, PC – £6.32
Or get this for £3.16 if you have one of the coupons from buying something in their Christmas sale.
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.