HSX: Hypersonic Xtreme

All cars:
Hold L1 + R1 and press Triangle, X(2), Circle, X, Circle, Triangle, X
at the main menu.

All tracks:
Hold L1 + R1 and press Square(3), X, Triangle(2), Square, X
at the main menu.

All track editor features:
Win all the Arcade Circuit and Slalom Series races in either first,
second, or third place.

Building Shop:
At the main menu hold R1+L1 and press:
x, x, x, triangle(3), square(3), circle(3), x, x, x.

 