Tony Hawk's Pro Skater 4

Enter the options menu, then select "Cheats". Enter doasuper to always have a full special.

This isn't really a cheat but it looks cool. While playing ,in any mode, head towards a wall or object (not an ramp or 1/4 pipe. Lock into a manual then into a flatland trick (pogo, casper, ect...) by pressing and combo of Triangle, square, circle. (Example, to do a casper press square then triangle) Run into the wall/object hard enough to knock you out of the trick. Right away ollie (press X). Your guy will do a trick like he would get out of the trick you ran into the wall with.

In the menu edit tricks, put handstand double handflip as one of your specials. While playing ,in any mode, press the buttons to assigned to your handstand doublehandflip. Just before your guy stands on his hand ollie (press x)
Your guys will just do a double hand flip. You can experiment with any other flatland special and see the other cool unnamed tricks.

When you chose your skater, there will be a menu with "spend money". Go to "cheats" and buy the cheat that says "now you see me, now you don't". This will turn skater invisible but you can still see the clothes and skateboard. When playing, do a trick (kickflip, ect...) Before your skate performs this trick, press start right away. Now go to "options", then "cheats". The cheat I told you to buy. Turn in on (or off if already on). Your skater will do a little of the trick (you'll see the clothes move). Continue turn the cheat on and off until the trick is complete. You can do this with any trick.

When you chose your skater, there will be a menu with "spend money". Go to "cheats" and buy the cheat that says "now you see me, now you don't". This will turn skater invisible but you can still see the clothes and skateboard. To only see the skateboard, got to create-a-skater (if easier go to edit clothes and gear). Take off your skater's shirt (it will only work with a guy, I know how you feel), take off you skaters shoes (barefeet), and any watches or brachalets on your skaters arms. Other words take every thing off your skater except the pants (no comment) and put breifs on him. Now go skating with the cheat I told you to buy on. All your see is a skateboard rolling around doing sick tricks.

Enter the options menu, then select "Cheats". Enter homielist to unlock Eddie, Jango Fett, and Mike Vallely.

Go to the options menu and select "Cheats". Then enter watch_me_xplode to get everything including Daisy.

Enter the options menu, then select "Cheats". Enter nospoon for Matrix mode. All ollies and aerial tricks will be in slow motion.

To access Moon Physics. Go into the main options menu from the main screen. Enter the cheats menu. Type "Superfly".

Enter the options menu, then select "Cheats". Enter superfly for moon physics.

Enter the options menu, then select "Cheats". Enter mullenpower for perfect manuals.