Tony Hawk's Underground 2 Codes -

 

Cheat mode:
Go to "Mini Games" then select the "Stylin" game. Do a manual by pressing , , then follow the commands that appear on the right side of the screen. You must complete the following levels in Stylin to unlock the corresponding cheat.

Stud Mode: Level 1
Perfect Rail: Level 2
Always Special: Level 3
Manual Balance: Level 4
Moon Physics: Level 5
Perfect Lip Balance: Level 6
Jet Pack Mode: Level 7
Matrix Mode: Level 8
Turbo Mode: Level 9
Mini Mode: Level 10

Alternately, complete arcade mode with the indicated number of skaters to unlock the corresponding cheat.

Stud Mode: 1 skater
Perfect Rail Balance: 2 skaters
Always Special: 3 skaters
Perfect Manual Balance: 4 skaters
Moon Physics: 5 skaters
Perfect Lip Balance: 6 skaters
Jet Pack Mode: 7 skaters
Matrix Mode: 8 skaters
Turbo Mode: 9 skaters
Mini Mode: 10 skaters

Complete level 2 of the Tagging mini-game to unlock the Graffiti Editor.

Bonus characters:
Go to "Mini Games" then select the "Tennis Shooter" game. You must complete the following levels in Tennis shooter to unlock the corresponding character. Note: To unlock the skaters in arcade mode, complete the "Tennis Shooter" mini-game in story mode at least one time.

Bam Margera: Level 20
Big Foot: Level 40
Bob Burnquist: Level 10
Chad Muska: Level 30
Eric Koston: Level 15
Eric Sparrow: Level 39
Mike Vallely: Level 35
Rodney Mullen: Level 25
Tony Hawk: Level 5
Wee-Bones: Level 41