The following are known Game Genie Codes for Ultima: Quest of the Avatar on Nintendo Entertainment System (NES).

• AZKPTIPA
  Start with 8,336 Gold Pieces
• APKPTIPA
  Start with 4,240 Gold Pieces
• AAKPTIPA
  Start with 144 Gold Pieces
• GTXPIVAA
  Start with 100 Ash instead of 8
• GTXPTVAA
  Start with 100 Ginseng instead of 8
• GTXPYVPA
  Start with 100 Garlic instead of 9
• GTXOATYA
  Start with 100 Silkweb instead of 7
• GTXOPVAA
  Start with 100 Moss instead of 8
• GTXOZTGA
  Start with 100 Pearl instead of 4
• GTXOLTAA
  Start with 100 Fungus instead of none
• GTXOGTAA
  Start with 100 Manroot instead of none
• AEKITITG
  Heal costs nothing instead of 70
• AAVILSZA
  Cure poison costs nothing instead of 10
• PAEENYOT
  Axe costs 1 instead of 225
• PAEEUYGP
  Staff costs 1 instead of 20
• AAOAXYPA
  Sword costs 144 instead of 400
• AAEAKYZA
  Bow costs 168 instead of 680
• PAXAONEG
  Leather costs 1 instead of 200
• AAXAKYZA
  Chain costs 88 instead of 600
• AAXEXNPA
  Plate costs 196 instead of 2,500
• AUNOYSLP
  Fighter starts with Strength of 48 instead of 27
• NYOOPVSK
  Fighter starts with Experience of 255 instead of 205
• LEVOZIPA
  Fighter starts with 812 Hit Points instead of 300
• LKNPYIAE
  Fighter starts with 75 Magic Points instead of none
• ZEVPTIAA
  Mage starts with 712 Hit Points instead of 200
• PAOPTTAA
  Mage starts with 381 Experience points instead of 125
• AXNOIIAP
  Mage starts with Strength of 32 instead of 16