Micro Maniacs

At the Options screen, select Secret Options, hold Select and press:
Motion Blur Mode - Triangle, Circle, RIGHT, Triangle, UP, RIGHT, Circle, UP, Square.
Increase Opponents AI - Circle, UP, Triangle, Circle, LEFT, Triangle, Square(x2), X, DOWN.
All Tracks - Triangle, Circle(x2), Triangle, DOWN, UP(x2), DOWN.
Infinite Power-Ups - Circle, X, Triangle, Square, X, LEFT, X, Square(x2), Circle, LEFT, Circle, UP, Triangle.
Tough Guys - Square, X, R1, Circle, UP, Square, DOWN, UP, DOWN, X, Square.
Tanks Mode - DOWN, UP, Square, Triangle, Circle, Triangle, RIGHT, Triangle.
Slow AI - UP, LEFT, Triangle, RIGHT, Triangle, Circle, Triangle, Square, UP, Triangle, LEFT.

 