The following are known GameShark Codes for Galaga: Destination Earth on Sony Playstation (PS1).

These codes were also known as Action Replay Codes outside the U.S. and later in the U.S. and are compatible with both devices.

• Infinite Lives
  3008C054 0004
• Infinite Health
  8008C07C 000F
  8008C07E 000F
• Score Modifier
  8008C000 ????
• Always Have Nuke
  8008C0B0 0001
• Max Merits
  8008C090 00FF
• Max Shields
  8008C07A 0064