Various codes

Go to "options" and then go to "cheats." Now, cheats are entered completely differently in the third installment. You now have to strum with the frets on just like normal playing! Two or more notes in parentheses indicate a chord.
G=Green, R=Red, Y=Yellow, B=Blue, O=Orange

1. OBOYOBOY
   Hyperspeed
2. (YO) (RB) (RO) (GB) (RY) (YO) (RY) (RB) (GY) (GY) (YB) (YB) (YO) (YO) (YB) Y R (RY) R Y O
   Unlock all songs in Quick Play
3. (RY) (RB) (RO) (RB) (RY) (GB) (RY) (RB)
   Performance Mode
4. (GR) (GR) (GR) (RY) (RY) (RB) (RB) (YB) (YO) (YO) (GR) (GR) (GR) (RY) (RY) (RB) (RB) (YB) (YO) (YO)
   Precision Mode
5. (BY) (GY) (GY) (RB) (RB) (RY) (RY) (BY) (GY) (GY) (RB) (RB) (RY) (RY) (GY) (GY) (RY) (RY)
   Air Guitar
6. (GR) B (GR) (GY) B (GY) (RY) O (RY) (GY) Y (GY) (GR)
   No Fail (does not work in career mode)
7. G R G Y G B G O G B G Y G R G (GR) (RY) (GR) (YB) (GR) (BO) (GR) (YB) (GR) (RY) (GR) (GY)
   Large Gems
8. (GR) (GY) (YB) (RB) (BO) (YO) (RY) (RB)
   Easy Expert (does not work in Career mode)
9. (GRBO) (GRYB) (GRYO) (GYBO) (GRYB) (RYBO) (GRYB) (GYBO) (GRYB) (GRYO) (GRYO) (GRYB) (GRYO)
   Unlock Everything (no sound plays when you enter these chords)