Cheats for ATV Racers on PS1.
At the main menu, go to Options, then input one or more of the following button combos to unlock the corresponding cheat. If entered correctly, you will hear a sound.
L1, L2, R2, R1, Left, Right, Square, Circle.
Unlocks all tracks and tournament cups.
Left, Right, L1, R2, R1, L2, Square, Circle.
Unlocks all characters.