Tony Hawk's Pro Skater 4

Cheats

Go to options, then type the following code into the "Cheat Codes" section.

superfly

This code gets you "Moon phsics" or "Moon Gravity"

Enter one of the names listed below to create a pre-made secret skater:

#$%@!
Aaron Skillman
Adam Lippman
Andrew Skates
Andy Marchal
Angus
Atiba Jefferson
Ben Scott Pye
Big Tex
Brian Jennings
Captain Liberty
Chauwa Steel
Danaconda
Dave Stohl
DDT
Fakes The Clown
Fritz
Gary Jesdanun
Jason Uyeda
Jim Jagger
Joe Favazza
John Rosser
Jow
Kenzo

Go to the cheat code menu and enter nospoon to unlock matrix mode

Go to the cheat code menu and enter 'watch_me_xplode' to unlock everything