Tony Hawk's Pro Skater 2 - Platform: Dreamcast

Cheat mode: 
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Pause the game, then hold L and press A(3), X, Y, Up, 
Down, Left, Up, X, Y, A, Y, B, A, Y, B. If you entered 
the code correctly, the pause screen will shake. 
Then, select the "End Run" option from the pause menu. 
All cheats, levels, FMV seqences, McSqueeb, Officer 
Dick, and Spider-Man will be unlocked. 

All levels:
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Pause the game, then hold L and press Up, Y, Right, Up, 
X, Y, Right, Up, Left, X(2), Up, B(2), Up, Right. 
If you entered the code correctly, the pause screen 
will shake. 

All hidden characters: 
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Pause the game, then hold L and press X, B, Right, Y, B, 
Right, B, Y, Right, X, Right, Up(2), Left, Up, X. 
If you entered the code correctly, the pause screen will 
shake. 

All gaps and Trixie:
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Pause the game, then hold L and press Down, Up, Left(2), 
B, Left, Up, Y(2), Up, Right, X(2), Up, A. If you entered 
the code correctly, the pause screen will shake. 

Special meter always full: 
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Pause the game, then hold L and press A, Y, B(2), Up, Left, 
Y, X to always have a full special meter. If you entered the 
code correctly, the pause screen will shake. Alternately, 
successfully complete the game by completing all level 
objectives in career mode five times.