CheatCodes.com has all the official Underground CD Vol. 4-1 PSX cheats to unlock everything. If you know of any that we don't have, please let us know.
All published and official codes as of Wednesday May 22, 2013 for Underground CD Vol. 4-1 are shown below.
At the main menu of Disc 2, repeatedly press [R1 + R2, L1 + L2].
At the main menu of Disc 2, hold L1 + L2 + X.
At the main menu of Disc 1, repeatedly press [L1 + L2, R1 + R2].
At the main menu of Disc 1, press R1 + R2 + L1 + L2.
At the main menu of Disc 1, press R1 + R2 + Start.
Enter the following Security Code:
1: L2 2: Triangle 3: L1 4: R1 5: Square 6: R2 7: X 8: Circle
Found some tricks that we don't have? Got some helpful hints, tips, or tactics we don't know about? Tell us and you could win a free PlayStation game (or any other game you want for any video game system)!