K1: The Arena Fighters information:
Hold L1 + L2 and press R1, R2 at the main menu of Disc 1.

Mech Warrior 2 information:
Quickly press Square, Triangle, Circle, X at the "Download Station" or "Debriefing" screens of Disc 1.

Peak Performance information:
Hold L1 + R1 and press Square, Triangle, Circle at the "Bulletins" screen of Disc 1.

WCW vs. The World information:
Press Square(2), Triangle(2), Circle(2) at the "Tech Q & A" screen of Disc 1.

Intelligent Qube preview:
Press Circle, Triangle, Square, Triangle at the "Imports" screen of Disc 1.

Blasto preview:
Hold Triangle + Circle and press Square(2) at the "Debriefing" screen of Disc 1.

Blasto picture:
Press Circle, Square, Triangle, Circle at the "Tech Q & A" screen of Disc 1.

Twisted Metal 2 body art:
Hold Square and press [Triangle, Circle] three times at the "Download Station" screen of Disc 1.

Game tester picture:
Hold L1 + L2 + R1 + R2 and press Square, Circle, Triangle, Square at the "Research And Development" screen of Disc 1.

Toggle music:
Press Start at the main menu of Disc 1.

Change light display:
Press L1, L2, R1, or R2 at the main menu of Disc 1.