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

• Start With Less Stamina
  AAUGPAAO
• Start With More Stamina
  AZUGPAAP
• Start With Sandals of Hermes
  AAEGOZZA
• Start With Staff of Fennel
  PAUGYAAA
  GZUKGASA
  GZUKTASA
• Start With Sword
  ZAUGYAAA
  GZUKGASA
  GZUKTASA
• Start With Divine Sword
  LAUGYAAA
  GZUKGASA
  GZUKTASA
• Infinite Energy
  SXSSNASA
• Start With Mega Energy!
  GLUGPAAO
• Start A New Game With 55 Red Jewels, a Better Weapon And The Magic Flute
  IAUGYAAA
• Start A New Game With 77 Red Jewels, a Better Weapon And The Sphere
  YAUGYAAA
• Start A New Game With 66 Red Jewels, a Better Weapon And The Magic Vase
  TAUGYAAA
• Get Items Much Faster
  UYXTGLEN
  VTXTILAA