It's still middle-click in my muscle memory from the Windows XP days!

God, I used to be _really_ into Minesweeper.

One of the earliest games I made back in college was a 3D Minesweeper cube. I remember being really proud of one little detail – the detection and automatic resolution of ambiguous clues that would require guessing, which always annoyed the heck out of me in every other version of Minesweeper.