Mission codes:
Pysion: BIDYE
Temple: KNUTW
Space Lab: BENYO
Rocket Silo (with Time Control Device): CODUZ
Rocket Silo (without Time Control Device): CODUP

Cheats:
Invulnerability On: NOHIT
Invulnerability Off: HITTT

Cinematic Sequences:
During the CRYO sequence when you first turn on the PlayStation press Start + Select until the choice of language screen. Press X to select your language and press Start to get to the Start/Options screen. Once there, press L1 + L2 + R1 + R2.