Tiny Brains, PC – £5.62
Apply coupon “GFDJAN25UK”.
Registers on Steam.
Pikmin 3, Wii U – £8.95
Update: It seems that this price was an error that has since been corrected.
Mario and Luigi: Dream Team Bros., 3DS – £7.95
Update: It seems that this price was an error that has since been corrected.
LEGO City Undercover: The Chase Begins, 3DS – £6.95
Update: It seems that this price was an error that has since been corrected.
Animal Crossing: New Leaf, 3DS – £7.95
Update: It seems that this price was an error that has since been corrected.
The Wonderful 101, Wii U – £8.95
Update: It seems that this price was an error that has since been corrected.

Update: Common sense has prevailed, and Double Fine have decided to drop the embargo. Full email update at the bottom of the article.
Double Fine’s Kickstarter rippled throughout the industry when in February 2012 they managed to raise a big boatload of money in order to develop a traditional 2D point & click adventure (At the time only known as “Double Fine Adventure”), and to finance a documentary of the development process. They asked for $400,000, but ended up receiving more than eight times that. (more…)
Need for Speed: Most Wanted, PC – £5.79
Also get all the DLC for £7.32, which has the added bonus that the game will (hopefully) stop pestering you to buy all the DLC.
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.
Registers on Origin.