TETЯIS

TETЯIS is a game released for the Nintendo Entertainment System in 1989 by Tengen. It was not only released outside Nintendo's third-party licensing system, but it was also released under the license of an unofficial distributor of the home version of the game. Nintendo entered into a lawsuit with Atari Games over the rights to the NES version, and the Tengen version was soon withdrawn from the market, replaced by Nintendo's own NES version, which some players considered to be inferior to Tengen's.

Gameplay
It is a game where you control falling shapes each consisting of 4 blocks, each piece randomly selected by the computer. The object is to guide the pieces down to the bottom of the playfield and fill up rows completely with blocks, which causes the row of blocks to disappear and causes whatever blocks are stacked above them to drop down one row or so. The player must prevent the stack of unfilled rows of blocks from reaching the top or else the game will end.