Underground CD Volume 1-2 Cheats (PlayStation)

At the "Research And Development" screen of Disc 1, hold L1 + L2 + R1 + R2 and press
Square, Circle, Triangle, Square.

Game Shark Codes

Note: For Quick Score Gain, change the '?' to 'F' on the "Score Modifier"
codes.

At the "Imports" screen of Disc 1, press Circle, Triangle, Square, Triangle.

Quickly press Square, Triangle, Circle, X.

At the "Debriefing" screen of Disc 1, hold Triangle + Circle and press Square(2).

At the main menu of Disc 1, hold L1 + L2 and press R1, R2.

At the "Download Station" or "Debriefing" screens of Disc 1, hold L1 + R1 and press
Square, Triangle, Circle at the "Bulletins" screen of Disc 1.

At the "Tech Q & A" screen of Disc 1, press Square(2), Triangle(2), Circle(2).

At the "Tech Q & A" screen of Disc 1, press Circle, Square, Triangle, Circle.

At the "Download Station" screen of Disc 1, hold Square and press Triangle(3), Circle(3).

At the main menu of Disc 1, press Start.