Dance Dance Revolution Club Version [DC]

Hidden mode option:
Select arcade mode, then choose any difficulty setting. Press the Analog-stick in any direction at the song selection screen, then press Up, Down, Up, Down, Up, Down, Up, Down.

Mirror mode option:
Select arcade mode, then choose any difficulty setting. Press the Analog-stick in any direction at the song selection screen, then press Left, Right, Left, Right, Left, Right, Left, Right.

Little mode option:
Select arcade mode, then choose any difficulty setting. Press the Analog-stick in any direction at the song selection screen, then press Left, Down, Right, Down, Left, Down, Right, Down, Up.

Left mode:
Select arcade mode, then choose any difficulty setting. Press the Analog-stick in any direction at the song selection screen, then press Left(8)

Right mode:
Select arcade mode, then choose any difficulty setting. Press the Analog-stick in any direction at the song selection screen, then press Right(8).

Shuffle mode:
Select arcade mode, then choose any difficulty setting. Press the Analog-stick in any direction at the song selection screen, then press Up, Down, Left, Right, Down, Up, Right, Left

Collection Mode
Press Right 4 times on Hard Mode on the Menu to unlock the Collection Mode. The Collection Mode allows you to play all the songs you have passed.