"TETRIS" The Legendary Games.

Who doesn't like playing a game? Almost every person in this world is loved to playing games. In this article, I want to discuss the most legendary game “Tetris”.

Tetris (Russian: Те́трис, pronounced [ˈtɛtrʲɪs]) is a tile-matching puzzle video game, originally designed and programmed by Russian game designer Alexey Pajitnov.^[1] It was released on June 6, 1984,^[2] while he was working for the Dorodnitsyn Computing Centre of the Academy of Science of the USSR in Moscow.^[3] He derived its name from the Greek numerical prefix tetra- (all of the game's pieces contain four segments) and tennis, Pajitnov's favorite sport.

quoted from https://en.wikipedia.org/wiki/Tetris 

History of Tetris

Tetris was created in June 1984 by Alexey Pajitnov, an artificial intelligence researcher working for the Soviet Academy of Sciences at their Computer Center in Moscow. Tasked with testing the capabilities of new hardware, Pajitnov would do so by writing simple games for them. He initially considered creating a game around pentominoes, which featured in puzzle games that he had enjoyed as a child, but felt that it might have been too complicated with twelve different shape variations, so the concept switched to tetrominoes, of which there are only seven variants. The Electronika 60 on which he was working had only a text-based display, so the tetrominoes were formed of letter characters. Realizing that completed lines resulted in the screen filling up quickly, Pajitnov decided to delete them, creating a key part of Tetris gameplay.

Tetris begins its global expansion by launching on PCs in North America and Europe. The game is showcased at the 1988 Consumer Electronics Show in Las Vegas, where Henk Rogers, video game designer and publisher, comes across it and gives Tetris a try. He’s immediately hooked and thinks there’s something special about the game (he wasn’t wrong!). His company, Bullet-Proof Software, obtains the rights to releases Tetris for PC and NES in Japan, and more than 2 million copies are sold.

Tetris Gameplay

"Tetriminos" are game pieces shaped like tetrominoes, geometric shapes composed of four square blocks each. A random sequence of Tetriminos fall down the playing field (a rectangular vertical shaft, called the "well" or "matrix"). The objective of the game is to manipulate these Tetriminos, by moving each one sideways (if the player feels the need) and rotating it by 90 degree units, with the aim of creating a horizontal line of ten units without gaps. When such a line is created, it disappears, and any block above the deleted line will fall. When a certain number of lines are cleared, the game enters a new level. As the game progresses, each level causes the Tetriminos to fall faster, and the game ends when the stack of Tetriminos reaches the top of the playing field and no new Tetriminos are able to enter. Some games also end after a finite number of levels or lines.

All of the Tetriminos are capable of single and double clears. I, J, and L are able to clear triples. Only the I Tetrimino has the capacity to clear four lines simultaneously, and this is referred to as a "tetris". (This may vary depending on the rotation and compensation rules of each specific Tetris implementation. For instance, in the Super Rotation System used in most recent implementations, certain situations allow T, S, and Z to 'snap' into tight spots and clear triples.)

The scoring formula for the majority of Tetris products is built on the idea that more difficult line clears should be awarded more points. For example, a single line clear in Tetris Zone is worth 100 points, clearing four lines at once (known as a Tetris) is worth 800, while a back-to-back Tetris is worth 1,200 each.

Nearly all Tetris games allow the player to press a button to increase the speed of the current piece's descent, rather than waiting for it to fall. The player can also stop the pieces increased speed before the piece reaches the floor by letting go of the button, this is a "soft drop"; otherwise, it is a "hard drop" (some games only allow soft drop or hard drop; others have separate buttons). Many games award a number of points based on the height that the piece fell before locking.

Players lose a typical game of Tetris when they can no longer keep up with the increasing speed, or when the player can not find an appropriate solution to the Tetriminos they've been given and the Tetriminos stack up to the top of the playing field. This is commonly referred to as "topping out."

That’s it. If you wanna play tetris, you can follow this link.