Vice: Project Doom

Hidden Menus
At any time during a game, hold A on the first controller and press Reset to activate these menus.

Stage Select/Sound Test


Press B on the second controller after a reset for a combination Stage Select/Sound Test (music plays automatically while changing number).

Demo Viewer


Press A on the second controller after a reset for a demo viewer.

Cutscene Changes
A couple of the game's cutscenes have changes between each version:

The scene following stage 6 has Reese getting shot in the head in the Japanese version. The US version simply has him getting jarred by an explosion while the background flashes, most likely due to the violence factor.

In the scene after stage 9, only the US version shows the boss creature turning back into Christy, and the close-up of Hart that follows flashes a different color in each version.