Invincibility
Select Credits at the options screen then press L1, Triangle, Up, Down, Circle(2), Triangle, Square, Right, Square.
All Weapons
Select Credits at the options screen then press L1, Triangle, Up, Down, Circle(2), Triangle, Square, Up, Circle.
Full Ammunition
Select Credits at the options screen then press L1, Triangle, Up, Down, Circle(2), Triangle, Square, Left, Triangle.
Extra Ammunition
Select Credits at the options screen then press L1, Triangle, Up, Down, Circle(2), Left(2), L1, L2.
One Hit Kills - Firearms
Select Credits at the options screen then press L1, Triangle, Up, Down, Circle(2), Triangle, Square, Down, R1.
One Hit Kills - Melee Weapons
Select Credits at the options screen then press L1, Triangle, Up, Down, Circle(2), Triangle, Square, Down, L1.
Expert Mode
Select Credits at the options screen then press Down(3), Triangle, Down(3), Square, Left, Right for tougher enemies.
