id Software is an American video game developer based in Dallas, Texas. It was founded in February 1991 by four members of the software company Softdisk: programmers John Carmack and John Romero, game designer Tom Hall, and artist Adrian Carmack. The founders, along with business manager Jay Wilbur, had previously developed the 1990 personal computer game Commander Keen in Invasion of the Vorticons as "Ideas from the Deep" while still employees of Softdisk. After its founding, id developed further shareware computer games in the Commander Keen series for Apogee Software, as well as a series of small games for Softdisk, before releasing the "grandfather of first-person shooters", Wolfenstein 3D, in 1992 through both shareware and retail. It was followed by Doom (1993), considered one of the