Ending bonuses
Win the game to unlock the "Battle Mode", "Ghost List", "Sound Test", and "Special Function" options as well as alternate costumes.

Alternate ending
Win the game under the nightmare difficulty setting. *** You must play from beginning to end.

Nightmare mode
Win the game in battle mode.

Screen saver
Allow the game to be paused for a few minutes. The "ghosts" will begin to put their bloody hands on the screen.

Chapter select
Win the game under the nightmare difficulty setting. A "Chapter" option will be unlocked in story mode.

PS2 Cheats for Project Zero

Project Zero cheat codes

Project Zero cheats