Prince of Persia 2

Hold down 1,2,3 keys when you start up PoP2 and you will have the powers of Jeffar.

SPECIAL COMMANDS:
SHIFT-I - Pressing the shift - i key will invert the screen (turn the picture upside-down). This is the same effect that you get when you drink an inverse potion. Press the same key to return the screen to normal.
SHIFT-R - Shift - r displays the text "Room X" where X is the number of the room that you are currently in. Room numbers seem to repeat on different levels.
SHIFT-B - Pressing shift - b will put you into a "blind" mode. The background scene is blacked out and only the animated objects are visible. If you leave the current room, everything (including animated objects) is blacked out. Press the same key to return the screen to normal.
SHIFT-K - Shift - k is the "kill" key. Pressing it will subract one health point.
Not particularly useful except for those of you with a death-wish.
SHIFT-F - Press shift - f to enter "frame" mode. This mode allows you to single step the animation. Frame mode also displays the current sequence and frame number. Press the space key to step to the next frame in the animation. Note that no other keys function while you are paused between frames (including the command keys)! This means that to exit frame mode you must repeatedly press the space bar and shift - f until you successfully type the key between frames. This can be a bit inconvenient.
F1 (function key 1) - This also puts you into "frame" mode but without displaying
sequence and frame information.
D - Pressing the d key (without the shift key) displays the text "Tension X" where
X is some number. I have no clue as to what this means.
- - The minus key subtracts minutes from the time remaining in the game. Not
particularly useful except for those of you looking for a challenge.
+ - The plus key (Shift - =) adds minutes to the time remaining in the game. Very useful.
CMD-G - Command - g displays a dialog that allows you to "goto" any level.
CMD-L - This command takes you to the beginning of the next level.
CMD-D - Command - d displays a dialog that allows you to set the tension level.
As stated above, I have no clue what the tension level does.
CMD-T - Typing Command - t will give you an extra health point. Once you have 12 health points (the maximum allowed), using this command refills any empty health points.
CMD-V - Command - v displays the version number.
CMD-K - Command - k instantly kills all the bad guys.