Underground CD Volume 3.3 Cheats - PlayStation
Primary Collection of Cheats
View R-Type Delta codes
Hold [L1] + [L2] + [R1] + [R2]
and press [Triangle] at the main menu of Disc 1.
View 3Xtreme information
Press [L2], [L1], [R1], [R2] at
the main menu of Disc 2.
View Syphon Filter information
Press [L2], [R2], [R1], [L2] at
the main menu of Disc 2.
Toggle background music
Press [Start] at the main menu of Disc 1, then
press [Left] or [Right]. Press [X] to return to
the menu.