Unlock monochrome mode:To change the graphics to black and white, type the following cheat code to the Code entry screen at the options menu: “9DE5″Different Colors:To change the saturation and hue of colors, type the following cheat code to the Code entry screen at the options menu: “B6FC”Unlock Sketched Graphics:To change the graphics to high contrast black and white type the following cheat code to the Code entry screen at the options menu: “A8D7”