At the risk of spamming the suggestion board, I'd like to suggest another game: Kentucky Route Zero
Platforms: Windows, Mac, Linux
Developer: Cardboard Computer
Labelled as a 'Realist Adventure Game', this game is a finalist in the 2013 IGF awards in multiple categories, including 'Excellence in Visual Art' and 'Excellence in Narrative'.
I haven't tried it yet, but it's near the top of my list. It's a bit expensive though. =[