Double Cast Codes -

View completion amount:
Quickly press Right, Circle, Left, X, Up, Circle, Down, X during the opening sequence before the "Production IG" text disappears. The amount of the game completed, in percent, will appear on-screen.

In-game reset:
Press L1 + L2 + R1 + R2 during game play.

Replay mode:
Successfully complete and save the game to unlock the replay mode option. This mode allows the game to be viewed non-interactively in a single sequence.

Omake mode:
Successfully unlock each of the four good endings with at least an 80% completed to unlock the omake mode option. This mode allows various artwork from the game to be viewed.