Here are some cheats and tips for the game Army Men: Sarge’s War.
Invisibility:
Pause game play, then hold L1 and press Up, Left, Right, Up, Circle.
Slow motion:
Pause game play, then hold L1 and press Left, Up, Right, Down, Circle.
All level weapons:
Pause game play, then hold L1 and press Right, Circle(2), Triangle, Circle.