Guitar Freaks 4th Mix: Left hand mode:
Press Green(5) at the mode selection screen.

Guitar Freaks 4th Mix: Little mode:
Press Red(3), Green(2), Blue(3), Pick at the mode selection screen.

Guitar Freaks 4th Mix: Fast flow mode:
Press Red, Green, Blue, Pick(2) at the mode selection screen.

Guitar Freaks 4th Mix: Super fast flow mode:
Press Red, Green, Blue, Pick(2) again at the mode selection screen after activating fast flow mode.

Guitar Freaks 4th Mix: Hidden mode:
Press Red, Blue, Green, Blue, Red, Green at the mode selection screen.

Guitar Freaks 4th Mix: Sudden mode:
Press Green, Red, Blue, Green, Blue, Red, Pick at the mode selection screen.

Guitar Freaks 4th Mix: Random mode:
Press Blue, Green(2), Red, Green, Pick at the mode selection screen.

Guitar Freaks 4th Mix: Super random mode:
Press Blue, Green(2), Red, Green, Pick again at the mode selection screen after activating random mode.

Guitar Freaks 4th Mix: Battle mode:
Press Pick, Green(2), Pick at the mode selection screen.

Guitar Freaks 4th Mix: Extreme mode:
Press Red, Blue, Pick, Green, Red, Blue, Pick, Green at the mode selection screen.

Guitar Freaks 4th Mix: Extreme plus mode:
Press Blue, Green, Blue, Green, Pick, Red(3), Green, Blue at the mode selection screen.

Guitar Freaks 4th Mix: Free select mode:
Press Red(3), Green(3), Blue(3), Green at the mode selection screen.