The following are known Action Replay Codes for C-12: Final Resistance on Sony Playstation (PS1).

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

Device Compatibility: Action Replay, CodeBreaker & GameShark

Infinite Machine Gun Ammo
800F30A4 0189

Infinite Rocket Launcher Ammo
800F30A8 0028

Infinite Ammo Secondary Fire
800F30A6 001C

Stop Timer
800F2B68 0073

Infinite Shield
800F309C 03E8

Infinite Health
800F3090 03E8