Armorines: Project S.W.A.R.M. cheats, and Codes for PSX.
This will enable the cheat mode, which will make you invincible and give you infinite ammunition. At the Title screen, hold L2 + R2 and press Left, Down, Right, Up. If you entered the code correctly, the words "Cheats On" will appear on the bottom right of the screen. Begin a game and select a level.