Reveal mine
Type "xyzzy", press [Keypad Enter] and [Left Shift] as soon as the game loads. Moving your pointer over a square with a hidden mine will result in a very small black pixel appearing in the top right corner of the screen. Alternately, type [Shift][Shift]xyzzy[Shift][Shift] after moving the pointer over the game area. Note: This code does not work in the Windows Millennium Edition version of the game.
Unlimited time
Hold the "Left Mouse Button" + Right Mouse Button" and press [Esc]. Alternately, hold the "Left Mouse Button" + Right Mouse Button" + [Ctrl].
Sound effects
Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Use a text editor to edit the "winmine.ini" file. Add the line "SOUND=3".
Change best times
Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Use a text editor to edit the "winmine.ini" file. Change the lines labeled "Name1", "Name2", and "Name3". Just change the name after the "=" sign, with the name you wish to have appear on the best times list. Also, if you wish to edit the times which appear on the list, edit the lines "Time1", "Time2", and "Time3", to the number of seconds.
Hints
Easy win
Go to the "Game" option and click on "Custom". Make the size as follows: height 24, width 30 and 10 mines. You should reveal a large number, if not all, of mines on the first click. If you win the gamem the smiley face will be wearing sun glasses.