Invincibility
 
 Pause the game and press Left(2), Right(2), Up(4), X, Up, X. 
 
 
 All creatures
 
 At the main menu, press Left, Right, Left(2), Right(3), X to unlock 
 all creatures.  
 
 
 All multi-player levels
 
 At the main menu, press Left, Right, Left(2), Right, Left, Right, 
 X to unlock all multi-player levels.  
 
 
 Mark all objectives complete
 
 Pause the game and press Left(2), Right(2), Down(3), Up, Down(2), 
 X.  
 
 
 Crystal
 
 Pause the game and press Left(2), Right(2), Left, Up, Right, Down, 
 Left, X(2).