Disc 1
Alternate Play Menu
press left after highlighting Episodes to highlight the barrel.
Alternate Scenes
go to Episode 1 chapters and press right when highlighting To Follow
Missing Scenes
Go to Episode 3 chapters and press right when highlighting To Follow
Alternate Ending to Episode 4
Go to Episode 4 chapters and press right when highlighting Adrift on the Endless Sea
Disc 2
Alternate Play Menu
Leave the Main menu by going to the Episode Menu, then go back to the main menu. Push up when highlighting episodes to highlight the switch, push to activate.
Disc 3
Alternate Play Menu
On the Main Menu Push up on Episodes to highlight the medalion in the cities of gold logo
Disc 4
Alternate Play Menu
On the Main Menu Push right on Episodes to highlight the door at the back of the room - press to go through a secret passage.