God Mode:
     At   the   title  screen,  Click  Right  Thumbstick,  Click  Left
Thumbstick,  Right,  Left,  L,  R,  Click Right Thumbstick, Click Left
Thumbstick, Right, Left, L, R.

Unlimited Ammo:
     At  the  title screen, press Black, R, Y, White, L, Up, Black, R,
Y, White, L, Up.

All Missions and Pictures:
     At  the  title screen, press White, Black, L, R, L, White, White,
Black, L, R, R, Black.

Add Weapons Option (when paused):
     At the title screen, press Up, Down, Left, Right, B, X, Up, Down,
Left, Right, B, X.

Acid Trip Mode:
     At the title screen, press Up, Black, B, Left, Y, X , White, L, B , R.