Tetris (ZX Spectrum, Andic Software)
According to the "World of Spectrum" website, this conversion of Tetris was released on the ZX Spectrum by Andic Software (UK), in 1986.
The ZX Spectrum and Commodore 64 were the first occidentals versions of Tetris in the market.
The game can be downloaded or played online through the World of Spectrum website. The specific web address within that site: - http://www.worldofspectrum.org/infoseekid.cgi?id=0005208