Here are some cheats and tips for the game Killzone.
Cheat mode:
Start a new game and enter Shooterman as a
case-sensitive name. All levels and characters
will be unlocked.
One shot kill:
Hold L1 at any menu screen, then press Circle,
Triangle, Circle, Triangle, X.
All movies:
Hold L1 at any menu screen, then press Circle,
Square, Triangle, Circle, Square.
Big head enemies:
Hold L1 at any menu screen, then press Circle,
Square, X, Circle(2).