Successfully complete story mode under the normal difficulty setting to unlock the Alien Doctor, Boat Captain, Lost Soul 1, Paulie Ryan, and The Hand characters; and Tony Hawk's Pro Skater School, Tony Hawk's Pro Skater 3 Canada, and Pro Skater levels.

Berlin: Easy points:

Go down the stairs, then past the cop in front of the door. Then go through that door and you will be on the roof. Walk into the air conditioning unit and it will break. Then, walk over the sparks on the ground where it was. You should get 1,000 points each time. This is helpful for getting the scoring goals completed in Classic mode.

Unlockables  -  Characters and levels

How to Unlock

Alien Doctor-Character Beat Normal Story Mode
Boat Captain-Character Beat Normal Story Mode
Canada-THPS 3 Level Beat Normal Story Mode
Lost Soul 1-Character Beat Normal Story Mode
Paulie Ryan-Character Beat Normal Story Mode
Pro Skater-some sort of alien level in Story Mode Beat Normal Story Mode
School-THPS 1 Level Beat Normal Story Mode
The Hand-Character Beat Normal Story Mode

Combo and high score objectives:  For the combo and high score objectives, do a long manual. While in the manual, press Square, Triangle, or Circle to do other types of manuals to add in your combo.

Control camera:  When skating, use the Analog-stick to move the camera. Note: Moving it when you are not on the skateboard will make you walk or run.

Run:  When you are not on the skateboard, hold X to run.

Perfect rail balance:  Enter TIGHTROPE as a code to unlock the "Perfect Rail Balance" option at the cheat menu during a game.

Original Tony Hawk's Pro Skater Tony Hawk:  Enter BIRDMAN as a code. Choose the "Secret Characters" option at the character selection screen in classic or free skate mode to access the original Tony Hawk.

Successfully complete story mode under the normal difficulty setting to unlock the Alien Doctor, Boat Captain, Lost Soul 1, Paulie Ryan, and The Hand characters; and Tony Hawk's Pro Skater School, Tony Hawk's Pro Skater 3 Canada, and Pro Skater levels.

Complete all classic mode goals under the sick difficulty setting to unlock the Australian Cop, Bratwurst Vendor, Corn Vendor, German Cop, German Drunk, Horn Player, Lost Soul 2, Metal Detector Man, Pirate, Skatopia Punk, and Zombie 2 characters.

Focused:  In order to get "Focused", fill your special meter then tap the Analog-stick Back. The game will go into slow motion, allowing you to "focus" better on the move that you want to do, hence the name. It will also allow you to balance better during grinds and manuals.

Get inside corners:  Come up to a corner and do a grab or flip trick. If there is an area behind the corner, you can go through the wall. This is a good way to get inside of buildings.

Skip Berlin - On any difficulty, when you start the level, just go to phil any time and he will ask you if you want to go and just say, yes.

Unlimited Supply - When you find the Voltraman, press down Square and he will throw electric balls. It takes a while for them to disappear.

Unlock Alien Doctor  -  Beat Normal Story Mode.

Unlock Australian Cop - Beat Every Classic Mode Goal on Sick difficulty.

Unlock Bratwurst Vendor - Beat Every Classic Mode Goal on Sick difficulty.

Unlock Boat Captain  -  Beat Normal Story Mode.

Unlock Canada THPS 3 Level  -  Beat Normal Story Mode.

Unlock Corn Vendor - Beat Every Classic Mode Goal on Sick difficulty.

Unlock German Cop - Beat Every Classic Mode Goal on Sick difficulty.

Unlock German Drunk 3 - Beat Every Classic Mode Goal on Sick difficulty.

Unlock Horn Player - Beat Every Classic Mode Goal on Sick difficulty.

Unlock Lost Soul 1  -  Beat Normal Story Mode.

Unlock Lost Soul 2 - Beat Every Classic Mode Goal on Sick difficulty.

Unlock Metal Detector Guy - Beat Every Classic Mode Goal on Sick difficulty.

Unlock Neversoft Video - Beat Every Classic Mode Goal on any difficulty.

Unlock Pirate - Beat Every Classic Mode Goal on Sick difficulty.

Unlock Pro Skater Alien Level in Story Mode  -  Beat Normal Story Mode.

Unlock Shrek - Beat Easy Story Mode.

Unlock Skatopia Punk - Beat Every Classic Mode Goal on Sick difficulty.

Unlock Space Monkey - Beat Easy Story Mode.

Unlock Zombie 2 - Beat Every Classic Mode Goal on Sick difficulty.