All missions
Enter at menu screen
R Y L X X R Invincibility
X Y L X R R Unlock All
God mode
Hit pause during the game then X Y L X R R
How to unlock Invincibility
After pausing the game
press R Y L X X R
Pick Mission
After pausing the game
press X Y L X R R Return to gameplay and pick any level
Mission select
Pause the game and press R Y L X2 R Although your health will still decrease you will not lose a life when it reaches zero
