Most games award points to the player for completing various tasks. The earliest games awarded points only for dropping tetrominoes, and some even gave a penalty for leaving piece preview turned on.

After Tetris for Game Boy, most games adopted a scoring system designed to reward difficult clears by giving points for more lines cleared at once. Some systems also encouraged starting at higher difficulty.

Original Nintendo scoring system

This score was used in Nintendo's versions of Tetris for NES, for Game Boy, and for Super NES.

Level	Points for 1 line	Points for 2 lines	Points for 3 lines	Points for 4 lines
0	40	100	300	1200
1	80	200	600	2400
2	120	300	900	3600
...
9	400	1000	3000	12000
n	40 * (n + 1)	100 * (n + 1)	300 * (n + 1)	1200 * (n + 1)

For each piece, the game also awards the number of points equal to the number of grid spaces that the player has continuously soft dropped the piece. Unlike the points for lines, this does not increase per level.

The New Tetris

The New Tetris awards "lines": one for each line cleared, one extra line for clearing four lines with one I tetromino, and several lines for clearing parts of a 4x4 square. This does not increase as the game gets faster. Soft and firm drops do not give points; instead, they allow the player to place more tetrominoes (and clear more lines) in the three minute game.

Tetris Worlds

Each mode of Tetris Worlds has its own scoring system. As in The New Tetris, the unit of score in each mode is "lines"; 2-, 3-, and 4-line clears grant additional points in some modes.

Tetris Deluxe

Tetris Deluxe scoring system is similar to Tetris Worlds.

Tetris DS

Each mode of Tetris DS has its own scoring system. Most notably, the system used in Standard mode represents a fusion of the 1, 3, 5, 8 pattern used in several modes of Tetris Worlds with the section multiplier of the NES and Game Boy system.

Guideline scoring system

Most games released after Tetris DS share large part of scoring system. As a result, the Tetris Guideline specifies a scoring system.

As of 2009, this is the guideline scoring system.

Action	Points(2006)	Points(2009)
Single	100 x level	100 x level
Double	300 x level	300 x level
Triple	500 x level	500 x level
Tetris	800 x level	800 x level
Mini T-Spin]]	100 x level
T-Spin	400 x level	400 x level
Mini T-Spin Single	100 x level, counted as Single	200 x level
T-Spin Single	800 x level	800 x level
Mini T-Spin Double	400 x level, counted as Double	1200 x level
T-Spin Double	1200 x level	1200 x level
T-Spin Triple	1600 x level
Back to Back Tetris/T-Spin	* 1.5 (for example, back to back Tetris: 1200 x level)	* 1.5
Combo	50 x combo count x level (Only available in some games released after Tetris Zone)	50 x combo count x level
Soft drop	1 point per cell	1 point per cell
Hard drop	2 points per cell	2 point per cell

External links

Tetris Zone scoring, including combo explanation