Pro Skater level:
To unlock Pro Skater level successfully complete story mode.

Triangle level:
To unlock Triangle level successfully complete classic mode.

Infinite rail balance:
At the Options menu select 'Cheat Codes'then enter 'Straightedge' as a code.

Unlock R/V halfpipe:
To unlock the R/V halfpipe and that mission for your character, play as Jesse James and jump over three cars.

Jump:
Press X

Grind:
Press Triangle (when close to rail)

Yee Haw Grab:
Press Circle + D-pad

Bull Flip:
Press Square + D-pad

Unlock aquarium in Zoo level:
Jump on the house near the elephant then hop on the elephant's back. He will become angry and smash the aquarium door.

Cheats Movie:
Clear all the gaps on all fifteen levels to unlock the Cheats movie.

Tony Hawk from Tony Hawk's Pro Skater 1:
Successfully complete classic mode on the normal difficulty setting to unlock Tony Hawk from Tony Hawk's Pro Skater 1.

Steve-O:
Play as Steve-O and successfully complete classic mode on the normal difficulty setting to unlock Steve-O.

The Hand
Play as The Hand and successfully complete story mode on the normal difficulty setting to unlock The Hand.

Natas Kaupas:
Play as Natas Kaupa and successfully complete classic mode on the sick difficulty setting to unlock Natas Kaupas.

Jesse Jones:
Play as Jesse Jones and successfully complete classic mode on the sick difficulty setting to unlock Jesse Jones.

Nigel:
Play as Nigel and successfully complete story mode on the sick difficulty setting to unlock Nigel.

Paulie:
Play as Paulie and successfully complete story mode on the normal difficulty setting to unlock Paulie.

Jester:
Play as Jester and successfully complete the New Orleans level in story mode to unlock Jester.

Shrek:
Play as Shrek and successfully complete story mode on the easy difficulty setting to unlock Shrek.

Call Of Duty soldier:
Play as Call Of Duty soldier and successfully complete story mode on the sick difficulty setting to unlock a Call Of Duty soldier.

Ben Franklin:
Play as Ben Franklin and successfully complete the Boston level in story mode to unlock Ben Franklin.

Matador (Bullfighter):
Play as Matador and successfully complete the Barcelona level in story mode to unlock Matador.

Graffiti Tagger:
Play as Graffiti Tagger and successfully complete the Berlin level in story mode to unlock a Graffiti Tagger.

Shrimp Vendor
Play as Shrimp Vendor and successfully complete the Australia level in story mode to unlock Shrimp Vendor.

Ryan Sheckler:
Play as Ryan Sheckler and successfully complete the Skatopia level in story mode to unlock Ryan Sheckler.

Peds Group A:
Complete Story on Easy

Peds Group B:
Complete Story on Normal

Peds Group C:
Complete Story on Sick

Peds Group D:
Complete Classic Mode on Normal

Peds Group E:
Complete Classic Mode on Sick

Peds Group F:
Complete Story with 100%

Peds Group G:
Complete Classic Mode with 100%

Peds Group H:
Get all gaps on all 15 levels