Question: What game did Alexey Pajitnov's partner produce?

Context paragraphs:
WildSnake: WildSnake, known as Super Snakey (スーパー・スネーキー ) in Japan, is a puzzle video game inspired by Tetris.  Snakes of varying colors and lengths fall from the top of the screen and slither to the bottom.  The goal is to clear out the snakes by touching two of the same color.  "WildSnake" was designed by Alexey Lysogorov and presented by Alexey Pajitnov.

Tetris: Tetris (Russian: Те́трис , pronounced ] ) is a tile-matching puzzle video game, originally designed and programmed by Russian game designer Alexey Pajitnov.  It was released on June 6, 1984, while he was working for the Dorodnitsyn Computing Centre of the Academy of Science of the USSR in Moscow.  He derived its name from the Greek numerical prefix "tetra-" (all of the game's pieces contain four segments) and tennis, Pajitnov's favorite sport.

The Tetris Company: The Tetris Company, LLC (TTC) is based in Hawaii and is owned by Henk Rogers and Alexey Pajitnov.  The company is the exclusive licensee of Tetris Holding LLC, the company that owns Tetris rights worldwide and the Tetris Company licenses the Tetris brand to third parties.

Vadim Gerasimov: Vadim Gerasimov (Russian: Вадим Герасимов ) is an engineer at Google.  In 1994-2003 Vadim worked and studied at the MIT Media Lab.  At age 16 he was one of the original co-developers of the famous video game "Tetris": he ported Alexey Pajitnov's original game to the PC architecture and the two later added features to the game.  Vadim earned a BS/MS in applied mathematics from Moscow State University in 1992 and a Ph.D. from MIT in 2003.

Hatris: Hatris (ハットリス , Hattorisu ) is a puzzle video game developed by Alexey Pajitnov for Bullet-Proof Software.  It was also released as an arcade game.

Hexic: Hexic is a 2003 tile-matching puzzle video game developed by Carbonated Games for various platforms.  In Hexic, the player tries to rotate hexagonal tiles to create certain patterns.  The game is available on Windows, Xbox 360, Windows Phone, and the web.  The game was designed by Alexey Pajitnov, best known as the creator of "Tetris".  While most earlier releases of the game were developed by Carbonated Games, the most recent version released for Windows and Windows Phone is developed by Other Ocean.  The name is a pun on the word "hectic" and "hexagons".

Tetris (Game Boy): Tetris (テトリス , Tetorisu ) is a puzzle video game for the Game Boy released in 1989.  It is a portable version of Alexey Pajitnov's original Tetris and it was bundled in the North American and European releases of the Game Boy itself.  It was the first game compatible with the Game Link Cable, a pack-in accessory that allowed two Game Boys to link together for multiplayer purposes.  A colorized remake of the game was released on the Game Boy Color entitled Tetris DX (テトリス デラックス , Tetorisu Derakkusu ) .  A Nintendo 3DS Virtual Console version of "Tetris" was released in December 2011 and lacks the multiplayer functionality.  It was delisted from the Nintendo eShop after December 31, 2014.

Tetris (Atari): Tetris (styled TETЯIS) is a puzzle game developed by Atari Games and originally released for arcades in 1988.  Based on Alexey Pajitnov's "Tetris", Atari's version features the same gameplay as the computer editions of the game, as players must stack differently shaped falling blocks to form and eliminate horizontal lines from the playing field.  The game features several difficulty levels and two-player simultaneous play.

Knight Moves (video game): Knight Moves is a puzzle video game released for Windows in 1995.  It is based on a similar game, "Knight Move" (note that "Move" is singular in this version) created by Alexey Pajitnov of "Tetris" fame, though he had no part in the creation of this game.

Henk Rogers: Henk Rogers (born 1953) is a Dutch video game designer and entrepreneur.  He is known for producing Japan's first major turn-based role-playing video game "The Black Onyx", securing the rights to distribute "Tetris" on video game consoles where the game found popularity, and as the founder of The Tetris Company which licenses the "Tetris" trademark.  Nowadays, he serves as Managing Director of The Tetris Company.

Supporting paragraphs: Henk Rogers The Tetris Company
Answer: The Black Onyx