zeogold: Jazzpunk?
Gone Home?
Vanishing of Ethan Carter?
Ether One?
I haven't played any of them and can't really tell you anything about them, but I hear they fall in the "walking simulator" category.
Me, I personally recommend Lumino City. It's very pretty to look at with a nice, calming soundtrack. The puzzles can be difficult, but there's a built-in hint system which works sort of like a scavenger hunt. Plus, there's always the option of a downright walkthrough.
Jazzpunk looks interesting, I seem to have missed that one. Wishlisted.
Gone Home, dunno if that one's really for me.
Vanishing... Hey I recently got this! Installing now.
Ether One - Great game, but requires some brainpower to work ;-)