Press start and hold L1 and press Down, Right.

Press start and hold L1 and press Right, Right.

Press start and hold L1 and press Right, Down.

Hold L1 and press Triangle, Right, Up, Square, Ttriangle, Right, Up, Square, Triangle.

Press start, hold L1 and press Left, Up, Square and Triangle to make your skater go faster.

Get all the gold medals and goals completed with Steve Caballero. You never fall down in manuals or grinds.

Get all the goals and gold medals in career mode with Officer Dick.

Get all the gold medals and goals completed in Career mode with Tony Hawk.

Using any skater, find every single gap in all the main levels.

Beat the game with your self-created character.

Get all goals and golds with Elissa Steamer to unlock the infinite special meter.

Start the level, go down the hill and turn right. Go forward until you see a Nokia sign above the elevator lobby. Then, go through all the glass and immediately turn right. Go up the ramp connected to the lobby wall and land in the middle of it (while pulling a grab -- for example Circle + Left). Note: This may require a few attempts.
When at the Nokia sign, just go all the way around that to the other side of it. Ollie off the quarter pipe directly next to it -- do not try to gap over to the other quarter pipe. Just ollie and land on the tan part, on the side that you started on. If done correctly, you will be stuck in a glitch. If you become stuck in it, you will not be able to pause the game and restart. You can only get out if you are not completely stuck in the glitch.

900 - Right, Down, Circle
Double kf to indy - Left, Down, Square
1234 Air - Up, Down, Circle

KF Superman Tailgrab - Right, Up, Square
Hang Ten - Down, Up, Triangle

Nosegrind to Pivot - Down, Up, Triangle
Kickflip backflip - Left, Down, Circle

Crailslide - Right, Down, Triangle
Christ Air - Left, Right, Circle
DBL KF madonnaflip - Right, Left, Circle

The Fandangle 2 - Up, Right, Triangle
Slamma Jamma - Right, Left, Square
Stalefish backflip - Down, Right, Square

The Bighitter 2 - Up, Left, Triangle
Mistyflip - Right, Down, Square
Fingerflip Airwalk - Left, Right, Circle

Sproing - Up, Down, Circle
Rowley Darkslide - Up, Right, Triangle

FS Noseslide lipslide Crook - Left, Up, Triangle
Hardflip Lateflip - Left, Right, Square

Nollieflip Underflip - Left, Up, Square
Gazelle Underflip - Up, Down, Square

Judo Madonna - Left, Right, Circle
Coffin Grind - Up, Left, Triangle

FS Layback Feeble - Left, Right, Triangle
1Foot 1Whl. Noseman - Down, Up, Circle

Human Dart - Up, Down, Triangle
The Jackass - Down, Up, Square
540 tailwhip - Up, Left, Square