Gomo, PC/Mac – £4.31
Apply coupon “GFDDEC20UK”.
Registers on Steam.
Killzone: Shadow Fall, PS4 – £29.94
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.
You will need to register this on a US PSN account, but it will work fine on a UK PS3/PS4.
Creatures Exodus registers on GOG, Battle Group registers on Desura, the rest register on Steam.
Faerie Solitaire, MANOS: The Hands of Fate, Oddplanet, Pitiri 1977, Splotches & Vincere Totus Astrum, PC – Pay What You Want
Pay £3.67 to also get Knytt Underground, NightSky & Really Big Sky.
Cognition: Episode 1, One Finger Death Punch, QbQbQb & Saviors, PC – Pay What You Want
Cognition: Episode 1 registers on Steam.