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.
 
  Game Shark Codez:
 
                             North American Version
 
                       
  Infinite Health 
  800B3F2E 0064
                       
  Extra Money     
  800B3F38 270F
                       
  Stop Timer      
  800CEB98 0017
                       
                                 Japanese Version
 
                       
  Infinite Health  
  800B2F86 0064
                       
  Infinite Ammo    
  800B2FAA 000C
                       
  Infinite Money   
  800B2F90 270F
                       
  Weapon in Slot 1 
  800B2F9A 006A
                       
  Weapon in Slot 2 
  800B2FA0 006B
                       
  Weapon in Slot 3 
  800B2FA6 006D