Hidden Return Of Ishtar game

Enter the Museum and go to the Return Of Ishtar room. Then, quickly press Right, Left, Up, Down, Circle. Now a hidden version of the Return of Ishtar game will begin.

Alternate introduction

When the Namco logo scrolls past while the game is loading, hold L1 + R1. Now the FMV introduction sequence from the Genji and Heiki Clan will be displayed.