The following are known GameShark Codes for Return Fire 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 U.S. version of the game.

• Infinite Fuel
  80082016 013F
  800EC21A 002C
• Infinite Ammo
  80082030 0095
  800EC236 0026
  80082040 0032
• Infinite Energy
  80082022 8000
• Infinite Lives
  800A3CDC 0303
  800A3CDE 0303
• Drive in Water
  80082044 67DC