TETRIS GLOSSARY
Marathon
Also called Endless
A survival and score mode that usually progresses through increasing levels or gravity. Some versions stop at a line or level goal; others continue until top out.
View in the A–Z glossary →Related terms
Level →
A stage of progression that may change gravity, delays or scoring multipliers. Level 20 in one game need not play like level 20 in another.
Gravity →
Automatic downward movement. In timing discussions, 1G means one cell per simulation frame. Gravity controls falling speed; lock delay controls how long a landed piece can remain adjustable.