Guitar Freaks 5th Mix

Hidden options:
Hold Blue and press Start before game play begins.

Left handed mode:
Press Green(5) at the song selection screen.

Little mode:
Press Red(3), Green(2), Blue(3), Pick at the song selection screen.

Speed up mode:
Press Red, Green, Blue, Pick(2) at the song selection screen.

Cycle difficulty setting:
Hold Green and press Pick(2) at the song selection screen to cycle through the difficulty settings.

Hidden mode:
Press Red, Blue, Green, Blue, Red, Green at the song selection screen.

Sudden mode:
Press Green, Red, Blue, Green, Blue, Red, Pick at the song selection screen.

Random mode:
Press Blue, Green(2), Red, Green, Pick at the song selection screen.

Super random:
Press Blue, Green(2), Red, Green, Pick again at the song selection screen after enabling random mode.

Battle mode:
Press Pick, Green(2), Pick at the song selection screen.