From the options menu, you will find the cheat menu. Go there and type in the password “5FINGERDISCOUNT” to unlock the Vulcan and the Flamethrower weapons.
To unlock all missions in the game automatically, insert IMFEDUPWITHTHIS into the in-game cheats menu.
Head to the in-game cheats menu and insert 47GIV3MECARS to unlock all of the cars in the game automatically.
