When the game was released in Japan, there were several alterations to the gameplay and graphics. These largely consisted of slight changes to cutscenes and alterations to gameplay that made it more difficult.

The most noticeable change is to Sir Dan's character design. Both his in-game and FMV model were changed to have a golden helmet, matching the one that he wore when he was still alive. The helmet can be unequipped in-game, but Dan will always be wearing it in FMVs except for the final cutscene where it is blown off.
According to the game's lead designer, Jason Wilson, the helmet was added because of a fear that Japanese audiences would react badly to Dan's skeletal design, and that they would not see him as a hero.


His eye was also given an iris, whereas in the original it only had a black pupil. This change was retained in all versions of the game's sequel.