Dance Dance Revolution 4th Mix

Left mode:
Press Up, Left(4) at the song selection screen.
Information in this section was contributed by tony.liquids.

Right mode:
Press Up, Right(4) at the song selection screen.
Information in this section was contributed by tony.liquids.

Little mode and flat modes:
Press Left, Down, Right at the difficulty selection screen to enable little mode. Repeat the code to enable flat mode. Repeat the code again to return to normal mode.
Information in this section was contributed by tony.liquids.

Hidden, sudden, and stealth modes:
Press Left, Up, Right at the song selection screen to enable hidden mode. Repeat the code to enable sudden mode. Repeat the code again to enable stealth mode. Repeat the code again to return to normal mode.
Information in this section was contributed by tony.liquids.