In the Japanese and Australian versions, when Richter Belmont takes damage his body flashes red, and when he dies he spurts blood.
In other versions of the game it was censored by recolouring the damage effects.

The Japanese version of the game is called "悪魔城ドラキュラＸＸ Akumajō Dorakyura Daburu Ekkusu" - which in English literally translates to "Devil's Castle Dracula Double X". The American version, however, is simply called "Castlevania: Dracula X". Likewise, the Australian & European versions were renamed to "Castlevania: Vampire's Kiss".

There are also several differences between the titles screens of the three games. The Australian/European version does not have blood on its title screen. The Japanese version also uses two religious crosses in its "Double X" title, rather than a single red X used by the American version. The "PASS WORD" option is also spelled incorrectly in the Japanese version, but was later corrected as "PASSWORD" in the International version.

In the Australian/European & Japanese versions, the boomerang cross weapon looks like a religious cross, but was replaced with a regular X-shaped cross in the International version. This was likely done to avoid any religious complaints.