Tony Hawk's Pro Skater 4 Codes -

Turbo mode:
Get all the gaps on each level except The Zone to unlock the Turbo option.

Hidden skater:
Complete the Pro Challenges to unlock Mindy, Frycook, Momo and Roger.

The Zone level:
Get all 90 packages to unlock The Zone.

Pro Challenge:
Get all goals in a level. Note: This must be done before any of the buyable cheats can be used for that skater.

Pro Skater animations:
Win the Pro Objective for that skater.

Moon physics:
Spend $40 at the skate shop.

Jet pack mode:
Spend $40 at the skate shop. Press B to fly up, A to move right, L to move left, and R to hover.

Matrix mode:
Spend $40 at the skate shop.

Alternate outfit:
Spend $40 at the skate shop.

Stud mode:
Spend $240 at the skate shop.

Always special:
Spend $240 at the skate shop.

Perfect rail balance:
Spend $240 at the skate shop.

Perfect manual balance:
Spend $240 at the skate shop.