Different Games:
I just figured out a code for sampler CD III (Tunnel B1, Tekken2, etc.) At the
game select screen go to a panel but don't go in the game. Instead press L1 or
R1. The panel will flip around and on the back you will see a 3 button code.
then punch in this code. you will hear a sound then get a preview of another
game, a story from another game, or a code for that game. Enjoy.