View Tomba FMV sequence:
Press Square, Circle, Square, Triangle(2) at the "Imports" screen of Disc 1.

View Gamebrain FMV sequence:
Press Circle + Triangle, Square(2) at the "Code Archive" screen of Disc 1

View ONE codes:
Press Square + Triangle, Circle(4) at the "Code Archive" screen of Disc 1.

View WCW Nitro codes:
Press Triangle(2), Circle, Triangle(2) at the main menu of Disc 2.

View Hooverphonic "Inhaler" music video:
Press Circle(2), Triangle, Circle(2) at the main menu of Disc 2.

View "Headswim Tourniquet Despite Yourself" music video:
Quickly press Circle, Square, Circle, Square, Circle, Square at the main menu of Disc 2.

Twisted Metal screensaver:
Line up the CD packages of the first four volumes of the Underground series to reveal the following code. Press Circle, Triangle, Square, Triangle(2), Circle(3) at the main menu of Disc 1 to reveal a secret URL (http://www.playstation.com/hiddenprize), username (underground), and password (insider). Note: Sony has since taken that web page address offlline.

Screensaver teaser:
Press Circle, Triangle(2), Circle, Square, Circle, Triangle, Circle at the main menu of Disc 1.

Hologram program:
Press Circle, Square, Triangle, X at the "Bulletins" screen of Disc 2.