The following are known Game Genie Codes for Hydlide on Nintendo Entertainment System (NES).

• Boost Strength, Life, Magic
  AZKAAVZE
• Super Boost Strength, Life, Magic
  GTKAAVZA
• Don’t Take Damage From Most Monsters
  SXSGYYSA
• Rapid Healing
  AEUEKVIA
• Rapid Magic Healing
  AANOVZZA
• Start With Full Life, Strength And Magic
  YYKAAVZA
• Play As Hydlide’s Head
  EPPOZX
• Different Colors
  PISOZT
• Scrambled Graphics
  IIIIII