Underground CD Volume 4.1 Toggle music: Press R1 + R2 + Start at the main menu of Disc 1. View Grand Theft Auto 2 codes: Press R1 + R2 + L1 + L2 at the main menu of Disc 1. View Sled Storm codes: Quickly press [L1 + L2, R1 + R2] repeatedly at the main menu of Disc 1. View WCW Mayhem codes: Hold L1 + L2 + X at the main menu of Disc 2. View GameDay 2000 codes: Quickly press [R1 + R2, L1 + L2] repeatedly at the main menu of Disc 2. View NBA Shootout 2000 information: Press L2, R2, L2, R2, L2 at the "Bulletins" screen of Disc 1. View Knockout Kings 2000 information: Press L2, R2, R1(2) at the "Cool Moves" screen of Disc 1. View You Don't Know Jack information: Press L1, L2(2), R2 at the main menu of Disc 2. View Syphon Filter 2 hints: Enter the following Security Codes. 1: L2 2: Triangle 3: L1 4: R1 5: Square 6: R2 7: X 8: Circle