Tetris is a 1988 video game published by Spectrum HoloByte in the United States and Mirrorsoft in the United Kingdom. It was the first commercial release of Tetris, a puzzle game developed in the Soviet Union in the mid-1980s, and was released on multiple home personal computer systems. Tetris received positive reviews overall, winning multiple Excellence in Software Awards, and would eventually sell over one million copies.

Tetris was created by Alexey Pajitnov in the Soviet Union. Pajitnov wanted to export Tetris, but had no knowledge of the business world. His superiors in the Academy of Sciences of the Soviet Union were not necessarily happy with the success of the game, since they had not intended such a creation from the research team. Furthermore, copyright law of the Soviet Union created a state monopoly on import and export of copyrighted works, and the Soviet researchers were not allowed to sell their creations. Pajitnov asked his supervisor Victor Brjabrin, who had knowledge of the world outside the Soviet Union, to help him publish Tetris. Pajitnov offered to transfer the rights of the game to the Academy, and was delighted to receive a non-compulsory remuneration from Brjabrin through this deal.

In 1986, Brjabrin sent a copy of Tetris to the Hungarian game publisher Novotrade. From there, copies of the game began circulating via floppy disks throughout Hungary and as far as Poland. Robert Stein, an international software salesman for the London-based firm Andromeda Software, saw the game's commercial potential during a visit to Hungary in June 1986. After an indifferent response from the Academy, Stein contacted Pajitnov and Brjabrin by fax to obtain the license rights. The researchers expressed interest in forming an agreement with Stein via fax, but they were unaware that this fax communication could be considered a legal contract in the Western world; Stein began to approach other companies to produce the game.

Stein approached publishers at the 1987 Consumer Electronics Show in Las Vegas. Gary Carlston, co-founder of Broderbund, retrieved a copy and brought it to California. Despite enthusiasm amongst its employees, Broderbund remained skeptical because of the game's Soviet origins. Likewise, Mastertronic co-founder Martin Alper declared that "no Soviet product will ever work in the Western world". Carlston regretted turning down what he described as "the worldwide rights to Tetris for $50,000 ... People have tried to make me feel better about my decision by telling me about everything Henk Rogers went through to get the rights, but yeah, I should have accepted the game".

Stein ultimately signed two agreements: he sold the European rights to the publisher Mirrorsoft and the American rights to its sister company Spectrum HoloByte. The latter obtained the rights after a visit to Mirrorsoft by Spectrum HoloByte president Phil Adam in which he played Tetris for two hours. At that time, Stein had not yet signed a contract with the Soviet Union. Nevertheless, he sold the rights to the two companies for £3,000 plus a royalty of 7.5 to 15% on sales.

Before releasing Tetris in the United States, Spectrum HoloByte's CEO Gilman Louie asked for an overhaul of the game's graphics and music. The Soviet spirit was preserved, with fields illustrating Russian parks and buildings as well as melodies anchored in Russian folklore of the time. The company's goal was to make people want to buy a Russian product. The game came complete with a red package and Cyrillic text, an unusual approach on the other side of the Berlin Wall.

The game was first released for IBM PC DOS, with other platforms following over the next year. The versions for the Macintosh, Macintosh II, Apple IIGS, Amiga, and Atari ST included a six-player tournament mode, an advanced mode, and music.

Spectrum HoloByte's version of Tetris was released for MS-DOS in Britain on January 27, 1988, and in the United States on January 29.