Play as Vampire Keith
Enter "Prince" as a first name and "Darkness" as a last name to play as Vampire Keith with only a powered-up stun glove and some punch moves.
Hidden graphics
Enter "Yuka" as a first name and "Kobayashi" as a last name. Get to the computer at the second or further save point to view actress Yuka Kobayashi, from whom Misato was based on. Two pictures will appear at each save point after the second one.
Alternate ending sequence
Allow Geils to kill you to view an alternate ending.
Special mode
Successfully complete the game in under seven hours to unlock special mode.
Blood type and vampires
Selecting a blood type (A, B, O, or AB) at the start of the game will have an effect on the type and difficulty of the vampires that will be encounted during the game.