The following are known Game Genie Codes for 8 Eyes on Nintendo Entertainment System (NES).

• Most Attacks Won’t Damage Orin
  GXOUSUSE
• Most Attacks Won’t Damage Cutrus
  GXNGNOSE
• Start With More Energy (Orin)
  AGVXGXYZ
• Start With More Energy (Cutrus)
  AGVXIXYZ
• Start Game With Some Item Power
  YZVXTZAE
• Never Lose Item Power Once Gained
  GXSLKVSE
• Start Game With Dagger
  VTOVNTVA