Maximum Chase

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"