Underground CD Volume 4 Game System: Sony Playstation Cheat Category: Hint Game Company: Unknown Game Category: Unknown Hint, Cheat, Walkthrough:   Underground CD Volume 4 View memory card commercial: Press Square, Circle, Square, Triangle at the "Code Archive" screen of Disc 1. View Red Asphalt codes: Press Square, Triangle, Square, Circle at the "Vault" screen of Disc 2. View Resident Evil 2 preview: Press Triangle, Square, Triangle, Square, Triangle at the "Vault" screen of Disc 2. View unreleased Twisted Metal FMV sequence: Hold Triangle + Circle and press Square(2) at the "Vault" screen of Disc 2. An unused Sweet Tooth winning ending sequence will be displayed. View "Clumsy" music video: Press Circle, Triangle, Circle, Square, Circle at the "Vault" screen of Disc 2. Falling snow: Press R2 at the "Vault" screen of Disc 2.