Go to the Press Start screen then to the New Game screen and hold L + R and press Y, X, Up, Up, Up.
Get All Chapters
Go to the Press Start screen then to the New Game screen and hold L + R and press Down, Left, Down, Y, Down.
Get All Disarms
Go to the Press Start screen then to the New Game screen and hold L + R and press B, B, X, X, Right.
Make Enemies Weaker
Go to the Press Start screen then to the New Game screen and hold L + R and press B, Left, Y, Up, Down.
Mini-games
Finish the Story Mode on any difficulty level.
Precursor mode
Go to the Press Start screen then to the New Game screen and hold L + R and press Up, Up, Down, Down, Up. A message will confirm correct code entry. This will turn off cursors.
Unlimited Ammo
Go to the Press Start screen then to the New Game screen and hold L + R and press Up, Left, Down, Right.
Unlimited Shotgun
Go to the Press Start screen then to the New Game screen and hold L + R and press Right, X, X, X, B.
Get 2 Guns...