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Tony Hawk's Underground - Game cheats, tips and tricks for Gamecube
Perfect Rail Balance:
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Go to the options menu and in the cheat codes area enter letitslide.
Go to options, then go to cheat codes.
Then you can activate it from the cheat menu.
keepitsteady - Perfect Manual
letitslid - perfect rails
digivid - unlock all videos
Secret Characters:
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Iron Man - Beat the game on beginner.
Gene Simmons - Beat the game on normal.
T.H.U.D. - Beat the game on sick.
Pedestrians - Perform every gap.
Complete 129 of 129 Goals to unlock a full cheats listing
Cool Specials - Get 129 of 129 Goals
Kid Mode - Get 129 of 129 Goals
Rollerskates - Get 129 of 129 Goals
Flame Grinds - Get 129 of 129 Goals
Always Special - Get 129 of 129 Goals
Perfect Rail - Get 129 of 129 Goals
Perfect Skitch - Get 129 of 129 Goals
Perfect Manual - Get 129 of 129 Goals
Moon Gravity - Get 129 of 129 Goals
unlock hidden levels:
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Hotter than Hell - Complete Story Mode (on any difficulty level)
Venice - Go to Hawaii and go to the back left of the
stage and ollie into the evil tiki statue
Hangar - Go to Moscow and turn right then go to the
right side of the building and jump in the
5th window
School 2 - Go to New Jersey to the train station and it
will be on the right side at the very top.