I think this is true only for the sale page. I couldn't see any sign of notice in other parts of Desura that shows a game whether it's DRM-free or not. And like Indie Royale, what they say is mostly misleading. For example I entered the game page of "Legends of Persia" (which has only a "Windows icon" on the sale page), and when I looked at its standalone files, I saw a file named: "Lop_Master_DRM_free_with_out_installer.zip". So, most probably the game is DRM-free but we just can't see it on the sale page!! A typical IR/Desura move!

Argh. Spoke too soon.

No, see you have to get the Amazon apps app (it's the orange one with "apps" on it), not the Amazon store app, which is different.

Follow these instructions
https://www.amazon.com/gp/feature.html?ie=UTF8&docId=1000626391&ref_=mas_dl_appstore_rr

Playing it right now, so it works!

Aye that's the one I got its on my phone as the Amazon appstore (just typed it wrong before). I'm logged in now but when I try to order something it says "an error occurred while purchasing blah blah please try again"

I've scanned the site via the client and here are some more games currently at 100% OFF, making them free:
http://www.desura.com/games/startbolita Originally at 3.99
http://www.desura.com/games/finalexit Originally at 2.99
http://www.desura.com/games/scavenger Originally at 1.99
http://www.desura.com/games/adventureball No original price
http://www.desura.com/games/avoid-the-nightmare-of-darkness No original price (says 30% OFF then free) It's in alphaish state

will edit this post If I find more...

Maybe it's a problem on their end, give it some time. You can always contact support, if you like.

UK is one of the countries which this works for, as listed here, so that's not the problem.
http://www.amazon.com/gp/help/customer/display.html?nodeId=201357480

Any idea if it's possible to 'claim' the free games and add them to your Desura library without installing the client? I've been able to claim gift codes in my browser before, but when I try to click on the button to "buy" a free game, it just brings up a pop-up with a button to use the Desura client to install it, and it doesn't add it to my game list. :/ And even if I install the Desura client will I have to download it now to get it for free, or can you just add it to your library for future use like free GOG games?

Got it sorted now, just had to follow a link and re enter my address and payment information for some reason. I got sonic 2 and dungeon hunter 4 :) tried to get CLARC and a couple of others but they wont work on my device (samsung galaxys 2) guess I'm due an upgrade! I use a network called giffgaff though which is by far the cheapest (its kinda like the GOG of mobile phone networks) but its all sim only and you have to buy the phone yourself.

Nice one for the tech support! :)

Unfortunately, I don't think you can claim a temporarily free game without resorting to the Desura client. You won't have to download it immediately when you add it and it will even appear on your account's library later, thus you can use the client only to claim a free game and then never use it again. Keep in mind, though, that if you uninstall the client, you will also remove those free games from your account.

Ah, thanks for the info. It's a bit bizarre that the games are tied to a specific installation of the Desura client, but oh well.. I'll take a look and see if there's anything worth it. :)

I think you can add the games to your account regardless of whether they work for you; at the very least, you can keep the games in your cloud till you can play them. Glad you got it working, though!

Edit: Didn't read down the thread enough. Problem already solved. Nothing to see here.

If I understand this correctly, it means that Desura is more evil than Steam and probably even Origin. Thanks for the info!

The client warns you that you will lose those games if you uninstall it. I tried it a while ago when Cubicity was offered for free and when I uninstalled the client, Cubicity was nowhere to be seen on my account, neither did it come back when I reinstalled the client.

That's a heck of a link. Where'd you stumble upon that link?
Let's take apart some of that:

ref=mas_fad_rr - is that you or...? (I'll assume no, unless you frequent Board Game Geek and your name is Troy)
hidden-keywords=... Wonder if that lists all the games.
page=1 - I like that, put all them results on one page

If anyone speaks Amazon API, can you translate?
rh=??? - Right Hand?
pf_rd_m=ATVPDKIKX0DER
pf_rd_s=merchandised-search-right-2
pf_rd_r=172CCSTMQF0A8TG7HFSD
pf_rd_t=101
pf_rd_p=1839141442
pf_rd_i=2350149011

Here's more links. It is spread over two pages. Careful, some of them are questionable. Plastic Surgeon? I like that review: "I'd rather be cleaning than play this game!"