In the past they had the Hitman game of the year edition which had DRM baked in, but they eventually removed it after some pressure, however there is a maintained list on their forum:
Most of it is for cosmetic things which you may feel is not a big deal, but if you read a little deeper you'll see there are more nefarious games on there.
Depends what you mean, Steam is not DRM, most of the game is sells don't have DRM. However Steam API has a DRM feature that developers can use of they choose to.
Rubicon (2010), it's a proper spy thriller based on intelligence analysts as opposed to field agents.
Unfortunately it got canned early, but I loved the story and writing, I have a feeling the show was a little too close to home, but that's a whole other conspiracy theory...
Where's the build guide?