Armorines: Project S.W.A.R.M.
To activate the cheats at the main menu screen hold L2 and R2 down and press Left, Down, Right and Up. If you have done the cheat correctly then ti will say CHEATS ON at the bottom of the screen. It will give you invincirbility and unlimited ammo.
Rapid Fire Press X d40605740040 800605740001 Super Jump Press Triangle d40605500010 800605500001
Thanks to Revolution readers Ahpschepsut and Michael!