T: Story Begins With T Cheats - PlayStation
Primary Collection of Cheats
Alternate main characters
Press [Right], [Left], [Right], [Down],
[Up], [Up] at the title screen. Change the number that
appears on the upper left corner of the screen to play as different
characters.
Change window color
Wait until the message window appears during game play.
Hold [Select] + [Triangle] + [L1], [L2], [R1]
or [R2]. While those buttons are held, press [Up] or
[Down] to change the corresponding color value. [L1]
controls red, [L2] controls green, [R1] controls blue,
and [R2] controls all three values.