Cheat mode:
     Select the "Extras" option at the main menu. Select "Modify Game"
option  then  enter  one  of  the  following  codes  to  activate  the
corresponding cheat function.

Note: Enabling a code will prevent the game from being saved. 

All songs:
     Press Red, Yellow, Blue, Red, Red, Blue, Blue, Red, Yellow, Blue.
If using a standard controller, press Y, B, X, Y, Y, X, X, Y, B, X.

All venues:
     Press  Blue,  Orange, Orange, Blue, Yellow, Blue, Orange, Orange,
Blue,  Yellow. If using a standard controller, press X, A, A, X, B, X,
A, A, X, B.

New venues:
     Press  Red,  Red,  Red,  Red,  Yellow, Yellow, Yellow, Yellow. If
using a standard controller, press Y, Y, Y, Y, B, B, B, B.

Awesome Detection:
     Press  Yellow,  Blue, Orange, Yellow, Blue, Orange, Yellow, Blue,
Orange.  If using a standard controller, press B, X, A, B, X, A, B, X,
A.

Stage mode:
     Press Blue, Yellow, Red, Blue, Yellow, Red, Blue, Yellow, Red. If
using a standard controller, press X, B, Y, X, B, Y, X, B, Y.


Achievements
     Complete each achievement to get the allotted gamerscore.

Along for the Ride (10)       Beat an instrument-specific challenge 
                              while playing another instrument

AN-I-MAL!!! (25)              Beat the Impossible Drum Challenge

Band Savior (20)              Be a savior three times during a single 
                              song

Beat It! (10)                 Complete all beats at 60 BPM or higher 
                              or half of the beats at 140 BPM or higher

Challenge Master (15)         Complete 25 Challenges on Hard Difficulty 
                              or 10 Challenges on Expert Difficulty

Challenge Novice (10)         Complete either 25 challenges on Medium, 
                              10 challenges on Hard, or 5 challenges 
                              on Expert

Challenge Savant (25)         Complete 25 Challenges on Expert Difficulty