Fighting Force 64 cheats and cheat codes for Nintendo 64

Cheat mode
Go to the title screen and press the following button combination:
Hold L + Z + C-Up + C-Down. If the code is accepted, you will jump
to character selection screen. Hit C-Left or C-Right to choose any
stage. You will start the game with invincibility.

Weapons - Location
Rocket launcher - Blow up the police car in the Car Park
Gun - Blow up the airplane at the Airbase
Flare gun - Blow up the two large black structures in the Hovercraft stage