Make Sarge Invincible, and All Weapons.
After you have started the mission, press the START button to bring up the pause screen.
These codes must be put in within about two seconds to work.
Make Sarge Invincible:
Hold Square, Circle, L1, L1+L2 (simultaneously).
All Weapons:
Hold Square, Circle, R1, L1, R1+R2 (simultaneously).
