id Software

id Software LLC
Formerly	id Software, Inc. (1991–2009)
Type	Subsidiary
Industry	Video games
Predecessor	Ideas from the Deep
Founded	February 1, 1991 in Shreveport, Louisiana, US
Founders	Adrian Carmack; John Carmack; Tom Hall; John Romero;
Headquarters	Richardson, Texas, US
Number of locations	2 (2024)
Key people	Marty Stratton (co-studio director); Hugo Martin (co-studio director);
Products	id Tech; Wolfenstein series (1992–2008); Doom series (1993–present); Quake series (1996–present); Rage series (2011–present);
Number of employees	200+ (2016)
Parent	ZeniMax Media (2009–present)
Divisions	id Software Frankfurt
Website	idsoftware.com
	Footnotes;

id Software LLC (/ɪd/) is an American video game developer based in Richardson, Texas. It was founded on February 1, 1991, by four members of the computer company Softdisk: programmers John Carmack and John Romero, game designer Tom Hall, and artist Adrian Carmack.

id Software made important technological developments in video game technologies for the PC (running MS-DOS and Windows), including work done for the Wolfenstein, Doom, and Quake franchises at the time. id's work was particularly important in 3D computer graphics technology and in game engines that are used throughout the video game industry. The company was involved in the creation of the first-person shooter (FPS) genre: Wolfenstein 3D is often considered to be the first true FPS; Doom is a game that popularized the genre and PC gaming in general; and Quake was id's first true 3D FPS.

In June 2009, ZeniMax Media acquired the company. In 2015, it opened a second studio in Frankfurt, Germany. ZeniMax Media was acquired by Microsoft in March 2021. In July 2026, the majority of id Software employees were reputedly laid off.