All weapons:
Pause game play and quickly press Square, Circle, R1, L1, R1 + R2.
Sarge will have access to all the weapons during the current level.
Alternatively, pause game play and press R1, L1, R1 + R2 within
two seconds.
Invincibility:
Pause game play and quickly press Square, Circle, L1, L1 + L2.
Sarge will be invincible during the current level. Alternatively,
pause game play and press L1, L1 + L2 within two seconds.
Run faster in multi-player mode:
Hold Square + Triangle to chase your opponent quicker.
Sites: