Guitar Hero: Smash Hits

At the main menu, select "Options", "Cheats", "Enter New Cheat", then enter one
of the following codes to unlock the corresponding cheat option. If you entered
the code correctly, a message will appear.

  Always Slide
  Press Blue, Yellow, Red, Green, Blue, Green(2), Yellow. This mode turns all
  guitar notes (not chords) into touch pad sliding notes connected by purple
  lines.


  Always Drum Fill
  Press Green(2), Red (2), Blue(2), Yellow(2).


  Hyperspeed
  Press Red, Green, Blue, Yellow, Green, Yellow, Red(2).


  Line 6 Effects
  Press Green, Red, Yellow, Blue, Red, Yellow, Blue, Green to unlock additional
  Line 6 effects in the Music Studio.


  Invisible Rocker
  Press Blue, Red(4), Yellow, Blue, Green.


  Air Instruments
  Press Yellow, Red, Blue, Green, Yellow, Red(3).


  Gem Color
  Press Red(3), Blue(3), Yellow, Green.


  Star Color
  Press Green, Red, Green, Yellow, Green, Blue, Yellow, Red.


  Vocal Fireball
  Press Green, Blue, Red(2), Yellow(2), Blue(2).

 