Monster Truck Madness 64
Sound Effects
While driving, to use your horn, press down. You can press up to hear other sounds.
 Sound Effects
 Low Rider Trucks
 Secret Tracks
Low Rider Trucks
Enter As password: "YRDR".

Secret Tracks
Aztec Valley - Successfully complete a circuit on the easy difficulty setting.
Alpine Challenge - Successfully complete a circuit on the medium difficulty setting.
Death Trap - Successfully complete a circuit on the hard difficulty setting.
Credit Goes To:Johan