Minesweeper
Reveal mines
Start the game, then type ” xyzzy “. Hold [Shift] for one second. Now when you hover over the mine areas, a tiny black pixel will appear in the top left side of the screen. It is almost invisible, and disappears when you hover over something that is not a mine.
The image featured at the top of this post is ©The Legend of Heroes: Trails of Cold Steel III key art / Original