This game is also available on Xbox.
Retro Game Cheats for Tony Hawk's Underground (Gamecube)
Effect: Moon Gravity.
When:
At the cheat codes screen located on the options menu.
How:
Enter getitup as a code.
Submitted By:
Effect: Perfect rail balance.
When:
Press pause and enter the cheat menu and activate the cheat.
How:
Write letitslide in the cheats option.
Submitted By:
Effect: Unlock the official T.H.U.G. song.
When:
This is a song and it will be avaivable in the song section so you can play it during the gameplay.
How:
Enter holeshot.
Submitted By:
Effect: Perfect Manuals.
When:
At the cheat codes screen located at the options menu.
How:
Enter keepitsteady.
Submitted By:
Effect: unlock all videos
Effect: Hotter Than Hell Level.
When:
During Gameplay.
How:
Get the last goal(kill erics best line). You will also unlock the Helicopter FMV sequence.
Submitted By:
Effect: Play as pedestrians.
Effect: Create-a-deck mode.
Effect: unlock Iron Man
Effect: unlock Gene Simmons (Kiss)
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