The following are known Game Genie Codes for M.U.L.E. on Nintendo Entertainment System (NES).

• 4 ‘Months’ For Beginner Game
  GEKALTTA
• 9 ‘Months’ For Beginner Game
  PEKALTTE
• 6 ‘Months’ For Standard Game
  TEXAIVGA
• 20 ‘Months’ For Standard Game
  GOXAIVGA
• Humanoids Start With $400
  EPOEPNAI
  PAOETYZA
• Humanoids Start With $800
  AZOEPNAI
  LAOETYZA
• Flappers Start With $1300
  GPUAAYAG
  IAUAIYTA
• Flappers Start With $2000
  EIUAAYAG
  YAUAIYTA