God mode:
     Pause  game  play, then hold L and quickly press X, Y, Y, X. Then
hold  R  and  quickly press Y, X, X, Y. Repeat the code to disable its
effect.

Increased damage by weapons:
     Pause  game  play,  then  hold  L and quickly press White, White,
Black.  Then  hold R and quickly press Black, Black, White. Repeat the
code to disable its effect.

All campaign missions and planes:
     Hold L + R and quickly press X, White, Black, Y, Y, Black, White,
X at the main menu.