[Intrepid Homoludens]

This game is hands down a zenith of impressive design and concept and quality. It looks like an action game but feels so much like an adventure game with a tinge of RPG elements, and large dollop of dark, mature edge. This is the thinking person's action/adventure.

There's a particularly wicked series of Riddler "puzzles" that involve gadgetry, brainwork, and properly shifted camera angles to "solve" that I found refreshing, partly because it seems impossible to do in 2D point-&-click. Good example of progressive thinking.