In the same order (as you list suggests) I would recommend to play the Daedalic games. 
Yes and no: Especially in Germany they had the DRM-free DVD version. Beside that the Deponia series was sold together with several magazines (yes, we have still the printed ones ) and it was part of several game bundles (for example Humble Bundles). Plus: Deponia was the most popular adventure game from Daedalic in Germany - it was featured in several TV shows.