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

The codes will work with the region specified but may work for other regions as well.

• Infinite Lives
  07FE:09
• Infinite Health
  074A:1F
• Infinite Ammo (Primary Weapon)
  074B:58
• Gun Never Overheats
  0749:00
• Infinite Time (Ten’s Digit)
  0743:09
• Infinite Time (One’s Digit)
  0744:09