This page contains Tetris Worlds Unlockables for GameBoy Advance called "Classic mode" and has been posted or updated on Sep 4, 2007 by cocomachine. Let us know what you think of this Unlockable by thumbs voting.
Enter the "Marathon" option at the main menu, then hold L and press Select. Enter the Marathon screen and select the "Popular" option to play the classic version of Tetris. Note: L and R will move the piece left and right.
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