id Mobile was id Software's mobile games development subsidiary. It was originally founded as an independent company called Fountainhead Entertainment by Katherine Anna Kang in November 1999 with an emphasis on exploring machinima. After finding success with Doom RPG, John Carmack's first tentative foray into mobile development, the company eventually merged with id Software and became id Mobile, continuing development on several series.
The subsidiary was announced as having been closed at QuakeCon 2012, on or around August 3, as a result of the internal reorganization by parent companies ZeniMax Media and Bethesda Softworks in response to the then-ongoing failures in the development of Doom 4. John Carmack claimed that the resources of the mobile division would be repurposed toward that game, but he, Katherine, and the majority of the team departed the company within slightly more than a year.
- Doom RPG (2005; J2ME, BREW)
- Orcs & Elves (2006; J2ME, BREW, Nintendo DS)
- Orcs & Elves II (2007; J2ME, BREW)
- Wolfenstein RPG (2008; J2ME, BREW, iOS)
- Doom Resurrection (with Escalation Studios, 2009; iOS)
- Doom II RPG (2009-2010; J2ME, BREW, iOS)
- Rage: Mutant Bash TV demo (2010; iOS)
- Rage HD (2010; iOS)
- Kang, Katherine Anna (14 November 2003). "Interview: Katherine Anna Kang." machinima.com (archived 🏛). Retrieved 30 September 2022.
- Nicholson, Brad (3 August 2012). "It Came from QuakeCon: id Closes Mobile Development As It Focuses on ‘Doom 4’." TouchArcade. Retrieved 30 September 2022.
- McWhertor, Michael (18 August 2014). "John Carmack's 9-year-old son just released his first video game." Polygon. Retrieved 29 October 2014.
| Doom era
| Doom 3 era
| ZeniMax era