Monster Truck Madness 64 Cheats (Nintendo 64)

You can press Down to use the horn. Different horns are given during each race.

Enable the "Low rider trucks" code and begin game play in two player mode. Collect a
shrinker missile, then shoot it at the other player's truck. That truck will appear to be
only body and wheels.

Note: Two players are required to perform this trick. Have player one get the hover
power-up and player two get the 
  shrinker missile. Then, have player one use the hover and begin to fly. While player one
is in the air, have player two use the shrinker. The truck will shrink but the tires will
remain the same size.

At the start screen press C-Down, C-Up, A, Z, R, B. You will hear a horn sound if code is
entered correctly.

At the code screen put in YRDR

Enter Y WNT IT as a password.

Press Up to get various effects

Win a circuit under Easy, Medium, or Hard to receive the Aztec Valley, Alpine Challenge,
or Death Trap tracks respectively.

If you go to the outside view of the truck, turn the view so it faces either the front or
back of the truck. Then, zoom in as 
  far as you can without going to cockpit view, then mash the throttle, you'll be able to
see the front or back wheels steer 
  on the truck, and the suspension work.

Beginner:

  Ruins:
  G[Up Arrow][Star]NJ2L0 

  Junk Yard:
  J[Star]XQYN4G 

  The Heights:
  M[Star]OT1Q9R[Left Arrow] 

  Voodoo Island:
  P[Left Arrow]3W4TC[Star][Left Arrow]F[Up Arrow] 

  Greenhill Pass:
  5[Up Arrow]627WFX9[Left Arrow]23G 

  Wasteland:
  V[Left Arrow]92[Up Arrow]2[Down Arrow]0CL56B5V 

  Aztec Valley:
  YYC5D2L3F[Right Arrow]89[Down Arrow]8[Right Arrow]B7 

  Intermediate:

  
  Ruins:
  GBGJ5MTL 

  Junk Yard:
  JNJMQL7S 

  The Heights:
  MJMPT[Right Arrow]XRN 

  Voodoo Island:
  PJPSWR0[Star]89R 

  Greenhill Pass:
  SBSV2[Star]3XBC[Up Arrow]4[Down Arrow] 

  Wasteland:
  VBVY2X60[Down Arrow]FD7B2M 

  Aztec Valley:
  YFY15093H[Left Arrow]G[Up Arrow][Down Arrow]5675 

  Alpine Challenge:
  1N1483C6KLJDH89[Up Arrow]G4N 

  Expert:

  
  Ruins:
  GKGH[Up Arrow]G[Star][Left Arrow] 

  Junk Yard:
  JGJKLJP[Star] 

  The Heights:
  MSMN[Right Arrow]M7QW 

  Voodoo Island:
  PKPQRP[Up Arrow]T793 

  Greenhill Pass:
  SKST[Star]SDW[Up Arrow]C61R 

  Wasteland:
  VOVWXVGZDF9463R 

  Aztec Valley:
  YGY209YJ2G[Left Arrow]C796462 

  Alpine Challenge:
  101231M5JLF[Up Arrow]C979S0D 

  Death Trap:
  404564P8M[Right Arrow][Left Arrow]DFC[Up Arrow]CV32KC

Enter "JMPR" as a password.         Custom Codes        
  Game Shark  
  
Unlock Aztec Valley Track - 801256BF 0001   Unlock Alphine Challenge Track -
801256DF 0001   Unlock Death Trap Track - 801256FF 0001   Infinite Missiles on Pick-Up -
D0164BBF 0001 801A6054 0009   Press L For Low Timer - D0014B35 0020 811A671C 3E00   Press
L For Weapon Modifier - D0014B35 0020 811A6058 0000 D0014B35 0020 811A605A 00??   No Laps
to Race (GS 3.0 or Higher Needed) - D11A5F2E 00FF 801A5F2F 0002     Quantity Digits to
Accompany Weapon Modifier Code   00 - Nitro  01 - Hover Weapon  02 - Lightning  03 -
'Blimp' Missile  04 - Spring  05 - Diamond  06 - Homing Missiles  07 - Oil
Slick

Enter "JMPNG" as a password to change all textures in the game into pictures of one of the
programmers of the game.