Enter "F3ARDAY1" as your profile name and this will unlock all levels. Warning: Achievements are disabled when using this cheat
press start and put in A,B,A,B,LEFT,RIGHT,DOWN. If you put it in correctly you should hear a beep.
For unlimited ammo press start and put in B,A,B,A,UP,DOWN,RIGHT,LEFT
If you put it in correctly you should hear a beep.