Machinarium

Machinarium is a point and click puzzle adventure game set in a robotic dystopian city. Instead of the usual pixelated design of aventure games, Machinarium's environment's are highly detailed and surreal. Everything appears to be dirty and rusty, however this only adds to the character of the environment. Rather than moving through each environment without glancing at it, you look forward to seeing what Machinarium offers next.

and some concept art, more can be found here-