Tetris is a retro puzzle video game that was originally released on June 6th, 1984. It was created by computer engineer and programmer Alexey Pajitnov, who had originally thought of the idea of the classic video game during his studies at Moscow Academy of Science.  He had help creating this game from his friends Dmitry Pavlovsky and Vadim Gerasimov.
Pajitnov's love for puzzle games as a child was what originally gave him the idea to create Tetris. The idea then developed from the inspiration from 'pentominoes' to 'tetrominoes', which consisted of the procedures for manipulating the pieces. This is done by flipping and rotating the tiles that are present to the player. This then further developed into the idea of creating full lines at the bottom of the gaming board which then automatically clears and allows the player to have more room to continue filling lines. Pajitnov's words to decribe the game: "It was so abstract - that was its great quality. It appealed to everybody."
The player loses the game when a new tile is blocked from entering the game board due to the filled gridsquares. The player technically is never able to 'win' a Tetris game, therefore the overall aim of the game is to gain a high score or to beat a personal score.