Select "Cheat Codes" at the options menu, then enter "tightrope" as a code to unlock the "Perfect Rail Balance" option.
Select "Cheat Codes" at the options menu, then enter "birdman" as a code. Choose the "Secret Characters" option at the character selection screen in classic or free skate mode to access Tony Hawk from the original Tony Hawk's Pro Skater.
Successfully complete story mode on the easy difficulty setting to unlock Shrek and Space Monkey characters.
Successfully complete story mode on 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.
Successfully complete all classic mode goals on 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; and the Downhill Jam level in free skate mode.
Successfully complete all gaps to unlock all food vendors, all musicians, the Bigfoot One, Boxer, Inline Skater, Lost Soul 3, Lounge Singer, Mayan, Skaboto, and Space Monkey 3 characters; and the Always Special, Moon Gravity, Perfect Grind, Perfect Manual, and Perfect Skitch cheats.
When you find Voltraman, press Square and he will throw electric balls; it takes awhile for them to disappear.
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.
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.
When you are not on the skateboard, hold X to run.
After you wipeout you can freak out by pressing Up and Down repeatedly.
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.
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.
Get some tomatoes, then find a boy throwing tomatoes at a caged bull. Join in and throw all your tomatoes and the bull will be set free. It will rampage around and hit a car. Ride over the car and you should be on fire.
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.
From the starting point, turn right and go to the apartments just before the construction site. Using the quarter pipe on the left side, jump through the window into the room above. You will see the Star Wars kid and can have him show you his moves. Press Circle to start and stop his moves.
Go to where the Star Wars kid is found, then go in the other apartment next to it to find someone dancing in front of a sheep.
Go to the waterfall on the second story to find that the waterfall goes down into the bowl and up the other side. If you stand next to the water going up, run, then jump while the water is pushing you up, you will perform a super jump. This is useful for getting up to the pools if you have just fallen off the edge.
Go on the aquarium elevator and start jumping up and down without your skateboard when the elevator is moving up. You should fall into the aquarium. To get out, walk through the glass holding the fish in the aquarium.