Use the following codes during the gameplay:
Rocket Launcher: Y, A, X, B, Y, Left.
Sniper Rifle: Y, A, X, B, Y, Right.
Uzi and More: Y, A, X, B, Y, Up.
Shotgun and More: Y, A, X, B, B, Up.
Heavy Machine Gun: Y, A, X, B, Y, Down.
Nail Gun: Y, A, X, B, A, Left.
Flight Mode: Y, A, X, B, X, Up.
Respect: Up, Down, Black, White.
Slow Motion: Y, A, X, B, B, Right.
Speed up Things: Y, A, X, B, B, Down.
Unlimited Ammo: Y, A, X, B, A, Right.
Invisibility: Y, A, X, B, B, Left.
Max Out Charisma: Y, A, X, B, A, Down.