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

• OTXSSYSV + ZAXSVYAA
  Take less damage from monsters
• OTXSSYSV
  Do not take any damage from monsters
• ZLVVVIGT
  Weaker poison
• EGVVVIGV
  Stronger poison
• IAUTEUZA
  Get 5 Super Shots when picked up
• GPUTEUZA
  Get 20 Super Shots when picked up
• AYETVUGU
  Invincibility lasts longer
• LPETVUGU
  Invincibility does not last as long
• ANNTUXGU
  Repulsiveness lasts longer
• LONTUXGU
  Repulsiveness does not last as long
• AYOTKUGU
  Invisibility lasts longer
• LPOTKUGU
  Invisibility does not last as long