| − | '''Tetris''' ([[ESRB]] ratings: E) is a puzzle [[video game]]. It was created in [[Russia]] in 1985 by [[Alexey Pazhitnov]]. | + | '''''Tetris''''' ([[ESRB]] rating: E) is a puzzle [[video game]] available on a wide range of platforms. It was created in 1985 by [[Russia]]n programmer Alexey Pajitnov while working at the Computer Center of the Russian (then Soviet) Academy of Sciences.<ref name="Gerasimov">http://vadim.oversigma.com/Tetris.htm</ref> He was assisted by fellow programmer Dmitry Pavlovsky and high school student Vadim Gerasimov.<ref name="Gerasimov" /> |
| − | The gameplay consists of a small area where differently shaped blocks slowly fall one after another in a random patter, the player can move horizontally the blocks or even rotate them. The objective is to gather points by forming lines with the blocks, causing them to be destroyed. If enough blocks accumulate to reach the top of the screen, the player loses.
| + | In its most basic form, gameplay consists of a small contained area that fills up with random falling tetrads – blocks consisting of four squares in varying configurations. The player can move the blocks horizontally, rotate them 90 degrees, or speed up their ascent. The object of the game is to earn points by forming lines across the bottom of the play area, causing them to be destroyed. More points are awarded depending on how many lines are destroyed at once. When the lines destroyed reach a certain threshold (usually ten), the rate at which the blocks fall will increase, and the player moves on to the next level. If enough blocks accumulate beyond the top of the screen, the game ends. |
| | + | The Russian [[folk music|folk song]] "Korobeiniki" (''Коробе́йники'', "the peddlers") was used as the default background music for early ''Tetris'' games, and is associated with the franchise to such a degree that, outside of Russia, it is often simply referred to as the "Tetris Theme". Other songs that have been used in the game include Ivan Larionov's "Kalinka", [[Pyotr Ilyich Tchaikovsky|Tchaikovsky]]'s "Dance of the Sugar Plum Fairy", and a movement from a [[Johann Sebastian Bach|Bach]]'s French Suite No. 3. |