id Software, Inc.

ID software is considered a founder of FPS games. They started with Wolfenstein series followed by Doom series and Quake series. They remained active to current days with many successful titles.

Ideas From the Deep

Iguana Entertainment, Inc.

Iguana was purchased by Acclaim and turned into Acclaim Studios Austin and Acclaim Studios Teesside.

Ikarion Software GmbH

In 1993 Kingsoft's owner Fritz Schäfer started a new company for PC and Amiga systems called Ikarion Software GmbH. Throughout the first years the company focussed on business simulations, later they started to develop strategy games and Gameboy Advance Puzzle Games.

Image Works

Image Works was a Mirrorsoft publishing label.

Imagexcel

Imagineering Inc.

Imagineering Inc. appears to be an internal development studio of Absolute Entertainment, Inc.

Imagitec Design Inc.

Impressions

Impression Software was founded in 1989. The company focused on strategy and business games including sport simulations. It was acquired by Sierra On-Line in 1995.

Incentive Software Ltd.

Incredible Technologies, Inc.

Incredible Technologies is a US studio founded in July 1985 by Elaine Hodgson and Richard Ditton who previously worked at Action Graphics, Inc., a studio spun off from Bally Midway Manufacturing Co., Inc.. The company initially specialized in designing and manufacturing commercial/arcade entertainment development and they are best known for the Golden Tee Golf arcade series. Incredible Technologies developed Grave Yardage for Activision. in 1989. The staff's biographies in that game's manual show the range of design and development IT has done: arcade game design and Bally/Midway and Capcom; development of original games and/or conversion for Cinemaware, Epyx, Mindscape; pinball machine development for Data East; system design for Brunswick's BowlerVision system. While still creating games, the company also started releasing casino games and machines in 2008.

Infocom, Inc.

Developer and publisher of interactive fiction games in the early 1980s. They were acquired by Activision in 1987.

Infogrames Europe SA

Atari SA (formerly Infogrames Entertainment SA (French pronunciation: [ɛ̃fɔɡʁam])), also known as Atari Group, is a French holding company headquartered in Paris that owns mainly video gaming-related interactive entertainment properties. Atari SA's core subsidiaries include the publisher and marketer Atari, Inc., developers Nightdive Studios and Digital Eclipse, and publisher Infogrames. It also has a blockchain division, Atari X, and additionally owns the websites MobyGames and AtariAge. Through these divisions, the company owns the rights to many video game properties that originated from Accolade, Atari, Inc., Atari Corporation, GT Interactive, Ocean Software, M Network via Intellivision and others. It is the sole owner of the Atari brand since 2001, through its subsidiary Atari Interactive Inc. which licenses the brand to other entities in the group.

Information Access Technologies, Inc.

Developed Three-Sixty games in the early 1990s.

Inland International

InSide Team

IntelliCreations, Inc.

Intelligent Games Ltd

Intelligent Games, Ltd. (IG) was a game development company founded in 1988 as The Intelligent Games Co. by Matthew Stibbe when he was 18 years of age. The name was changed to Intelligent Games, Ltd. in 1993 when it was incorporated. The company was located in west London, United Kingdom.

Interactive Fantastic Fiction

InterActive Vision A/S

International PC Owners

IPCO was a user group for IBM PC owners, operating out of Pittsburgh, Pennsylvania and later Poland, Ohio, USA. The founders were two engineers and their wives, Jim and Cindy Cookinham and Steve and Windy Hart. The group's selection of software - which covered business, science, graphics, education, utilities and games - was put together from user contributions. For an annual membership due ($15 within the US, $20 for Canada and $45 worldwide, as of 1982), IPCO members were eligible to participate in the group's software exchange: submit a program to the IPCO catalog, and receive a diskette with 4 free programs of your choice. The catalog included 80 programs as of early 1983, and over 175 by July that same year; by mid-1984 the count had grown to over 300 programs (selling for $3 per program or $6 per disk), plus 20 compilation disks ($15 each). Other productions included the bimonthly "IPCO Info" newsletter, with information on PC hardware/software (including the emerging shareware/public domain arena), reader requests, tips, comments, and even gossip culled from BBS messages.

Interplay Productions, Inc.

The company was founded by Brian Fargo in 1983. Stationed in Southern California, the company created marvelous titles like Fallout or Baldur's Gate. Even over the former success, the company eventually went bankrupt in 2004 and sold most of their intellectual property to other companies like Bethesda.

Interstel Corporation

Interstel Corporation was a company originally established as Cygnus by Trevor C. Sorensen. He had made a game for DEC computers called Starfleet in 1981 and the company was created to market Star Fleet I: The War Begins, an adaptation for home computers. Together with his partners the company was incorporated in 1986 to form Interstel Corporation and from then on the name Cygnus was no longer used. In the same year Interstel Corporation became an affiliated label of Electronic Arts. In 1988 one of Interstel's games, Empire: Wargame of the Century, was named as Computer Game of the Year by Computer Gaming World magazine. Star Fleet II: Krellan Commander was released in 1989. A hostile takeover bid forced Sorensen to sell his shares and leave Interstel in 1990, and the company ceased operation in 1992. Before that, many titles were released, developed in-house or by external teams. Sorensen's worked continued at Supernova Creations, a studio he co-founded in 1991.

IQ Games

Ishi Press International

J & J Gameware