Information in the game database is updated periodically. Below, you'll find that information compiled as pertains to id Software. The company may be involved as a publisher, developer or both.
Orcs & Elves [November 13, 2007]
Commander Keen Episode I: Marooned on Mars (PC) [December 14, 1990]
Doom (PC) [December 10, 1993]
Doom 3 (PC) [August 3, 2004]
Doom II: Hell on Earth (PC) 
Quake II (PC) [November 30, 1997]
Wolfenstein 3D (PC) [May 5, 1992]
Doom 3: Resurrection of Evil [October 5, 2005]
There are numerous companies in the industry, and their names change like the weather. The information above is not particular about the finer details. Acquisitions are common, so companies with no recent listings may still be developing games under a new name. For example, DMA Design currently has a Rockstar name. Do you know of a title that is not listed above but should be? Be sure and let a staff member know. You can contact staff if you click here.