A top out occurs when:

  • a tetromino cannot be placed at least partially within the play zone.
  • garbage pieces are sent, pushing the top pieces above the spawn zone.

Top outs usually result in a game over. However, in Tetris Blitz, top outs result in a 3-second penalty and removal of line 16 upwards.

Loss conditionEdit

There are several variations of what constitutes a top out:

  • Block out: a piece is spawned overlapping at least one block in the playfield
  • Lock out: a piece locks when it is entirely out of bounds (that is, in the vanish zone above the ceiling)
  • Partial lock out: a piece locks when it is partially out of bounds, even if it would clear a line. This is not used in the Tetris Guideline as of 2009.
  • Garbage out: After lines are cleared and garbage is added, a block remains out of bounds.
    • Line 41+ garbage out is the version used in the Tetris Guideline.

Different games have used different combinations of these conditions:

This list is incomplete.
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