Within a day, he built a feature where players could build the station using tetromino blocks.

A player receives bonus points if he can clear more than one line with a single tetromino.

A free tetromino is a free polyomino made from four squares.

The name Tetris was derived from the words "tetromino" and "tennis."

A tetromino is a geometric shape composed of four squares, connected orthogonally.

At the final level, the player is given the 2x2 square O tetromino and must complete an 8x8 square puzzle.

(The tetromino consisting of four squares in a row is excluded.)

The player can also turn a T-shaped tetromino into a hole, called a T-slot, to get more points.

Each of the five free tetrominoes has a corresponding tetracube, which is the tetromino extruded by one unit.

The game ends when at least part of a tetromino extends beyond the top of the playfield when set in place.

Also named Tetromino Go.

This unlocks power-ups that occasionally provide opportunities such as halting the rate of new tetromino drops, and removing blocks from the screen.

And there was nothing like that moment when you cleared four lines in a row thanks to the 'I tetromino' (yes, that's what it was called!)

Gerasimov reports that Pajitnov chose the name "Tetris" as "a combination of 'tetromino' and 'tennis'."

When a game ends, the score is based on the number of squares in each player's pieces on the board (e.g. a tetromino is worth 4 points).

Pentomino solver Program (with C++ source code) to compute the 16146 solutions (provided) for covering the checkerboard with 12 pentominoes and a tetromino.

A 2x2 square (an O tetromino) made of four smaller block pieces is dropped into the playing field, which may appear different as the player advances through levels or skins.

The software author had written a tetromino game for the iPhone iOS without authorization from The Tetris Company.

Individual puyos can connect horizontally or vertically, but not diagonally; the whole group need not be a line, but can be any tetromino (or larger).

Players build a space station using tetromino pieces while managing resources and minions, defending against attacks, and extending the base towards four monoliths at the edges of the level.

This allows the player to insert the tetromino currently on the screen into a small box for future use, and will swap places with a piece after the button is pressed again.

J and L are the same tetracube, as are S and Z, because one may be rotated around an axis parallel to the tetromino's plane to form the other.

One other feature is that the rotation is much more flexible than in traditional Tetris games, trying several slight nudges, which players have called "wall kicks", before finding one where the tetromino fits.

The game has been compared to a cross between Boggle, Tetris, and tile-matching, where tetromino blocks fall from the top of the screen that players turn into letters and rearrange into words.

The pieces can be maneuvered for a half second on the same line it was dropped before it locks (meaning the player can drop the Tetromino one line to restart the lock-down timer).