October 4, 2004) Further reading Zak, Robert (December 2018). "The ultimate guide to modding Doom" TechRadar Hamilton, Andi (December 2018). "The cult of Doom: the thriving mod scene behind id's classic" PC Gamer External links Doomworld: The Top 100 WADs Of All Time (retrieved December 6, 2004) Doom (franchise) Copyleft media Fan labor