The following are known GameShark Codes for Shadow Gunner: The Robot Wars on Sony Playstation (PS1).
These codes were also known as Action Replay Codes and in most cases will work on both devices.

These codes are for the European version of the game.

• Infinite Health
  8006DA60 0640
• Infinite Shoulder Weapon Ammo
  8006DA66 000?
• Hand Weapon Upgrade
  8006DA64 000?

Weapon Modifiers

Replace ? with the number by the upgrade you wish to have.
• 1 – Mortar
• 2 – Rocket Pod
• 3 – Missile Launcher
• 4 – Rocket Launcher
• 5 – Laser Pulse
• Shoulder Weapon Upgrade
  8006DA6A 0005