
Atari Corporation was an American manufacturer of computers and video game consoles.

Atari Games Corporation was an American producer of arcade games. It was originally the coin-operated arcade game division of Atari, Inc. and was split off into its own company in 1984. It was one of several companies to use the name Atari.

Spike Chunsoft Co., Ltd. is a Japanese video game development and localization company specializing in role-playing video games, visual novels and adventure games. The company was founded in 1984 as Chunsoft Co., Ltd. and merged with Spike in 2012. It is owned by Dwango.

Coktel Vision was a French video game developer and publisher based in Paris. It was best known for its educational and adventure games.

Denton Designs was a British video game developer based in Liverpool. The company was founded in 1984 and initially specialised in developing software for the ZX Spectrum home computer. Amongst the founders were developers who had worked on the unfinished "Mega game" Bandersnatch for Imagine Software.

Gremlin Graphics Software Limited, later Gremlin Interactive Limited and ultimately Infogrames Studios Limited was a British software house based in Sheffield, working mostly in the home computer market. Like many software houses established in the 1980s, their primary market was the 8-bit range of computers such as the ZX Spectrum, Amstrad CPC, MSX, Commodore 16 and Commodore 64. The company was acquired by French video game publisher Infogrames in 1999, and was renamed Infogrames Studios in 2000. Infogrames Studios closed down in 2003.

Home Entertainment Suppliers Pty. Ltd. is an Australian company that distributes computer games and gaming equipment. HES' offices are based in Riverwood, Sydney. HES's founder and managing director is MR Sebastian Giompaolo.

Kemco is a Japanese video game developer and publisher established in 1984. It is headquartered in Kure, Hiroshima.

New World Computing, Inc. was an American video game developer and publisher founded in 1984 by Jon Van Caneghem, his wife, Michaela Van Caneghem, and Mark Caldwell. It was best known for its work on the Might and Magic role-playing video game series and its spin-offs, especially Heroes of Might and Magic. The company was purchased by and became a division of The 3DO Company on July 10, 1996 from NTN Communications, after NTN purchased New World Computing for $10 million in stock.

Psygnosis Limited was a British video game developer and publisher headquartered at Wavertree Technology Park in Liverpool. Founded in 1984 by Ian Hetherington, Jonathan Ellis, and David Lawson, the company initially became known for well-received games on the Atari ST and Commodore Amiga. In 1993, it became a wholly owned subsidiary of Sony Computer Entertainment (SCE) and began developing the original PlayStation and later became a part of SCE Worldwide Studios. The company was the oldest and second largest development house within SCE's European stable of developers, and became best known for franchises such as Lemmings, Wipeout, Formula One, and Colony Wars.

Quicksilver Software, Inc. was founded on May 1, 1984, by three former Mattel Electronics programmers: Bill Fisher, Stephen Roney, and Mike Breen. The company specializes in the creation of strategy, simulation, and educational products, and on focused high-technology R&D projects.

Rainbow Arts Software GmbH was a German video game publisher based in Gütersloh. The company was founded in 1984 by Marc Ullrich and Thomas Meiertoberens and acquired by Rushware in 1986. In 1999, Funsoft Holding, which acquired Rushware and sister company Softgold in 1992, sold Rushware to THQ, which was incorporated into THQ Deutschland, THQ's German operations arm.

Rockstar San Diego, Inc. is an American video game developer and a studio of Rockstar Games based in Carlsbad, California. Colombian entrepreneur Diego Angel founded the company as Angel Studios in January 1984 after studying film in Chicago, where he grew fond of computer animation. The studio began with a focus on animation and visual effects for multimedia productions such as advertisements, films, and music videos. Notable productions include the film The Lawnmower Man and the music video for Peter Gabriel's song "Kiss That Frog".

Spike Chunsoft Co., Ltd. is a Japanese video game development and localization company specializing in role-playing video games, visual novels and adventure games. The company was founded in 1984 as Chunsoft Co., Ltd. and merged with Spike in 2012. It is owned by Dwango.

Ubisoft Reflections Limited is a British video game developer and a studio of Ubisoft based in Newcastle upon Tyne. Founded in 1984 by Martin Edmondson and Nicholas Chamberlain, the studio focuses on racing games and it is best known for creating the award-winning Driver series. Reflections was acquired by GT Interactive in 1998 and sold to Ubisoft in 2006. The company works on AAA games in close cooperation with sister studio Ubisoft Leamington.