In 1987, Soviet Academy of Sciences researcher Alexey Pajitnov (who invented the original game in 1984) alongside Dmitry Pavlovsky and Vadim Gerasimov developed a new version of "Tetris" out of a desire to create a two-player puzzle game. Andromeda Software executive Robert Stein approached Pajitnov with an offer to distribute "Tetris" worldwide, and secured the rights to license the title. He in turn sub-licensed the rights to Mirrorsoft for the European market and Spectrum HoloByte for the North American market. After seeing the game run on an Atari ST, programmer Ed Logg petitioned Atari Games to license it for an arcade version, and approached Stein. With the rights secured, Atari Games produced an arcade version of "Tetris", and under their Tengen subsidiary began development to port the title to the Nintendo Entertainment System (NES) in June 1988. The port was released in May 1989.