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Tetris Unblocked is a puzzle video game created by Soviet software engineer Alexey Pajitnov in 1984 and published by CoolGames. It has been published by several companies for multiple platforms, most prominently during a dispute over the appropriation of the rights in the late 1980s. After a significant period of publication by Nintendo, the rights reverted to Pajitnov in 1996, who co-founded the Tetris Company with Henk Rogers to manage licensing.

In Tetris Unblocked, players complete lines by moving differently shaped pieces (tetrominoes), which descend onto the playing field. The completed lines disappear and grant the player points, and the player can proceed to fill the vacated spaces. The game ends when the playing field is filled.

The longer the player can delay this outcome, the higher their score will be. In multiplayer games, players must last longer than their opponents; in certain versions, players can inflict penalties on opponents by completing a significant number of lines. Some versions add variations on the rules, such as three-dimensional displays or a system for reserving pieces.

Gameplay of Tetris unblocked

Tetris Unblocked is primarily composed of a field of play in which pieces of different geometric forms, called “tetrominoes“, descend from the top of the field. During this descent, the player can move the pieces laterally and rotate them until they touch the bottom of the field or land on a piece that had been placed before it.

The player can neither slow down the falling pieces nor stop them, but can accelerate them in most versions. The objective of the game is to use the pieces to create as many horizontal lines of blocks as possible. When a line is completed, it disappears, and the blocks placed above fall one rank. Completing lines grants points, and accumulating a certain number of points moves the player up a level, which increases the number of points granted per completed line.

In most versions, the speed of the falling pieces increases with each level, leaving the player with less time to think about the placement. The player can clear multiple lines at once, which can earn bonus points in some versions. It is possible to complete up to four lines simultaneously with the use of the I-shaped tetromino; this move is called a “Tetris”, and is the basis of the game’s title.

If the player cannot make the blocks disappear quickly enough, the field will start to fill, and when the pieces reach the top of the field and prevent the arrival of additional pieces, the game ends. At the end of each game, the player receives a score based on the number of lines that have been completed.The game never ends with the player’s victory; the player can only complete as many lines as possible before an inevitable loss.

Since 1996, the Tetris Unblocked Company has internally defined specifications and guidelines that publishers must adhere to in order to be granted a license to Tetris Unblocked. The contents of these guidelines establish such elements as the correspondence of buttons and actions, the size of the field of play, the system of rotation, and others.

Arcade Puzzle Skill



  • LMB = Hard Drop
  • RMB = Hold
  • Drag to move the Tetrimino


  • Arrow up = Rotate clockwiese
  • Arrow down = Soft drop
  • Arrow left = Move left
  • Arrow right = Move right
  • Shift = Hold
  • Space = Hard drop
Drift Hunters



Tetris Unblocked Games

How to Play Tetris