Enter the options menu, then choose the "Cheats" selection. Enter "FREAKSHOW" as a code (case-sensitive) to unlock all cheat options. If you entered the code correctly, you will hear the sound of money being collected. All characters including Darth Maul, Wolverine, Officer Dick, Private Carrera, Ollie The Magic Bum, Kelly Slater, Demoness, and the Neversoft Eyeball Man will be unlocked.