The following are known Game Genie Codes for Splatterhouse 3 on SEGA Genesis.

• Infinite Lives
  DDBA-AA6A
• Start With 0 Lives
  AAZA-AAFR
• Start With 1 Lives
  AEZA-AAFR
• Start With 4 Lives
  ATZA-AAFR
• Start With 9 Lives
  BEZA-AAFR
• Almost Invincible
  AT8T-EA4Y
  AT8T-EA5A
• Start With Almost No Health
  CACT-AAA2
• Start With 25% Health
  JACT-AAA2
• Start With 50% Health
  TACT-AAA2
• Start With 75% Health
  2ACT-AAA2
• Beating Heart Is Worth Nothing
  ADCA-AAG8
• Beating Heart Is 1/2X Normal
  GDCA-AAG8
• Beating Heart Is 2X Normal
  2DCA-AAG8
• Beating Heart Is Full Health
  ADCA-ACG8
• Orbs Worth Nothing
  AXCA-AA3R
• Orbs Worth 2X Normal
  HHCA-BJVR
• Orbs Worth 3X Normal
  HHCA-BNVR
• Orbs Worth 4X Normal
  HHCA-BTVR
• Start With 25% Power
  AE2A-AACY
  CT2A-AAC6
• Start With 50% Power
  AJ2A-AACY
  FA2A-AAC6
• Start With 75% Power
  AN2A-AACY
  HT2A-AAC6
• Start With 100% Power
  AT2A-AACY
  LA2A-AAC6
• Power Does Not Decrease When You Are Mutated
  AW5T-AA5G
• Invincibility
  AJ5T-EJDW