Cheat Mode

At the main menu, hold L, R, Left Analog-stick, Right Analog-stick, and quickly press Black(2), White, Black, White, Black, White at the main menu. Various cheat options will appear, not all.



God Mode

At the main menu, press A(5), X(2).



All weapons

First, beat the first chapter, once done hit back and you should see the main menu screen. At the main menu screen press A, R, Left, Right, Up, Y, B, C, Y, Right(2), Up, A, A.