Section 3: Objective
Complete horizontal lines to clear them and keep the stack from reaching the top of the well. Tetris has no win condition in its endless form — play continues until the stack tops out, so the objective is to maximise score and survive rising speed.
- A line clears when all ten cells in a row are filled.
- Clearing lines lowers everything above them.
- The game ends when a new piece cannot be placed — a top out.