The following are known Action Replay Codes for Alien 3 on Super Nintendo Entertainment System (SNES).

• Infinite energy
  7E12425E
• Infinite ammo for the Pulse Rifle
  80D8B8EA
• Less ammo in Rifle Clips
  80D8CB32
• More ammo in Rifle Clips
  80D8CBA0
• Infinite oil for the Flame Thrower
  80DB7DEA
• Faster fuel consumption for the Flame Thrower
  80DB8C30
• Slower fuel consumption for the Flame Thrower
  80DB8CFF
• Infinite ammo for the Grenade Launcher
  80DBD2EA
• Less ammo in Grenade Clips
  80DBE205
• More ammo in Grenade Clips
  80DBE214
• Less energy from Medi-Kits
  81810303
• Maximum energy from Medi-Kits
  81810D00
• Most attacks do no damage (You can switch on and off)
  81812200
• Take less damage
  81812202
• Longer invulnerability after being hit
  818291FF
• Start with fewer Rifle Clips
  81E88804
• Start with more Rifle Clips
  81E88810
• Start with even more Rifle Clips
  81E88820
• Start with fewer Grenade Clips
  81E89504
• Start with more Grenade Clips
  81E89510
• Start with even more Grenade Clips
  81E89520