Top out
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A top out occurs when:
- a tetromino cannot be place at least partially within the play zone.
- garbage pieces are sent, pushing the top pieces above the spawn zone.
Top outs result in a game over.
Loss condition
Different games have used different conditions to detect whether a top out has occurred:
- This list is incomplete.
- Tetris (NES, Nintendo): a piece locks overlapping at least one block, but in some cases it is possible to move or rotate out of such a situation
- Dr. Mario, Tetris and Dr Mario: a piece is spawned overlapping at least one block
- Tetris DS (standard mode and mission mode): a piece is spawned overlapping at least one (offscreen) block, or a piece locks completely above the visible portion of the playfield
- Bombliss: at least one block remains in the rows above the visible playfield after a line is cleared or garbage is added
- Tetris (Atari), Tetris (NES, Tengen), The New Tetris, and Tetris DS (push mode): a piece is placed partially off the top of the playfield, even if it would clear a line, or garbage pushes at least one block above the top of the playfield