Weird Worlds: Return to Infinite Space. And then I found out how awesome it is compared to the free "prequel." Digital Eel for the win.

Also, Rival Ball, by Longbow Games. These devs offer some playable demos that actually can be played for a while, and after playing Freeware Rival Ball for years I decided to purchase all the board sets for that game.

Other than that, several of them have been Visual Novels, but those might not be 'games' in the strictest sense of the term.

No. I don't buy games I'm not interested in. Why would I invest in something I'm not interested in/don't like just to give the signal to the devs that I want more of what I'm not interested in/don't like?

*edit* As a caveat to this, I will try a game I'm only mildly interested in, but only if it's on sale and that's not strictly to support the devs. But if the game turns out to be better than i expected, it could well mean I'll buy others from that developer.

No; I pre-ordered the Witcher 2 to support their anti-DRM policy, and I basically never pre-order games. And I'm planning to buy the Amnesia sequel day one, because I especially want to support the devs, and I basically never buy games day one. But that's as far as I go.

Same (almost) for me as I already had those games. I however also allowed me to have drm-free + steam copies (I had the Shadowgrounds games on Impulse).

And now that people mentions Alan Wake, I bought them as soon as they appeared here even though I still had not the time to play them.

I will tend towards buying a game to support a principle if I'm interested in that game in general, but I won't buy a game just to help a developer, because I don't believe that the onus should be on the gamer to justify a developer's existence.

As an example - I've bought very few Ubisoft games on the PC since 2009, but I did buy Rayman Origins full price. I had a vague interest in the game, and if it had had DRM, I probably would have waited until it fell to €10. As it stood, I wanted the game and felt the need to vote with my wallet, so I bought it.

Apparently Rayman Origins did fairly well in sales in retail too. No doubt contributed towards Ubisoft's decision to phase out it's always-online DRM.

Actually? I don't recall. If they make good games, I don't need to 'support' them, I just pay for their product.

I'm not picky on genres either, so as long as it's a good game, I buy it.

Yes, I actually bought Prince of Persia 2008 for it's DRM-free stance, I also bought the witcher and the witcher 2 and Galactic Civ 2 for the same reason.

Nope. No point in wasting money on a game in which I'm not interested. I have on occasion bought another copy of a game I really liked though.

I bought The Witcher 2: AoK even though I don't even like RPGs (I still haven't played it). I bought it because I wanted to support the devs for deciding to offer a full-retail, big budget production DRM-free on release.

I bought Alan Wake here even though I wasn't interested in playing it. Not because it was DRM-free (although that is the reason I bought the game here rather than somewhere else), but because it's a stellar example of a PC port done right, and I wish all devs would take care to put as much effort into their ports as Remedy did with this game.