Hidden message:
Insert the game disc into an audio CD player and play track 2. A backwards audio track with the repeating phrase "number nine" (in reference to The Beatles song) can be heard.
Secret FMV sequence:
Intentionally lose the game after reaching Act 3 by allowing the power to be turned off or letting Eddie capture the girls. Then, press Left, A, Up, Right, A during the closing sequence to view an extra scene featuring Lyle.