Tetris is a tile-matching puzzle game, developed in the Soviet Union in 1984. The game has a simple goal of destroying lines of blocks before it reaches the top. The line is made up of a square block. The Tetrimino is the shape of the 4 connected blocks that fall down. The player will have to use the Tetrominos to create lines that fill the box. This will clear the lines of blocks. The game continues, the lines of blocks that is not completely filled will drop down as many lines that were cleared. The game has levels of difficulties which rises as the game is being played.
Tetris has appeared on many video game systems. It has become very common from back when Alexey Pajitnov first made it in 1984. With over 500 million copies sold across all of its different versions, it is the best-selling video game of all time.