Aliens vs. Predator [2010], Binary Domain, Condemned: Criminal Origins, Hell Yeah! Wrath of the Dead Rabbit & Viking Battle for Asgard, PC – £12.48
All except Condemned definitely register on Steam, don’t know about Condemned though.
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.
Not sure about steam. It says buy and download, which means you will download it from Amazon (and it is usually DRM-free). But I might be wrong…
If you look at the pages for each individual game, they all confirm that they register on Steam, except for Condemned, hence my uncertainty.
Just had a look at the condemned page on amazon
“Requires Steam Client to activate.”
So yup, all 5 activate.