At the Bandai logo, press Up, Triangle, Left, Square, Down, X, Right, Circle, then hold L1 + R1. If you entered the code correctly, you will hear a sound. Release L1 + R1 when the title screen appears. Then, press L1 + L2 + R1 + R2 to access "Addition Mode", which allows the FMV sequences, narrations, 3D demonstrations, and voices to be played.
Mobile Suit Gundam: Perfect One Year War