Tony Hawk's Pro Skater 2

Perfect balance 
Pause the game, then hold L and press 
C-Down, Right, Down, C-Left, C-Down, C-Up, C-Right, C-Left. 
If you entered the code correctly, the pause screen will shake. 

10x points mutiplier 
Pause the game, then hold L and press 
C-Down, C-Down, C-Down, C-Down, C-Left, C-Right, Right. 
If you entered the code correctly, the pause screen will shake.

Raise stats to 10 
Pause the game, then hold L and press 
Down, Up, C-Up, C-Left, Down, Up, C-Up. 
If you entered the code correctly, the pause screen will shake.

Double moon physics 
Pause the game, then hold L and press 
C-Down, C-Left, C-Right, C-Left, Up, C-Down, Down, Right, C-Down, C-Down. 
If you entered the code correctly, the pause screen will shake.

Thin skater 
Pause the game, then hold L and press 
Left, C-Right, Right, Down, C-Down, Up, Up. 
If you entered the code correctly, the pause screen will shake. 

This code may be entered multiple times to continue making your 
skater more Kate Mossish.

Turbo mode 
Pause the game, then hold L and press 
C-Left, C-Down, C-Up, Down, Up, Right to increase the speed of the game 
by 25%. If you entered the code correctly, the pause screen will shake.

Flight mode 
Pause the game, then hold L and press 
Right, Up, C-Down, C-Up, C-Down, C-Left, C-left, C-Right. 
If you entered the code correctly, the pause screen will shake.