Doom (1993 video game)
The ability for others to create custom levels and otherwise modify the game using WAD files turned out to be a popular aspect of "Doom". Gaining the first large mod-making community, "Doom" affected the culture surrounding first-person shooters, and also the industry. Several future professional game designers started their careers making "Doom" WADs as a hobby, among them Tim Willits, who later became the lead designer at id Software.
Doom (1993 video game)
The "Doom" franchise was later continued with the follow-up "" (1994) and numerous expansion packs, including "Master Levels for Doom II" (1995), and "Final Doom" (1996). Originally released for MS-DOS, the games have been ported to numerous other platforms. Once the game's source code was released in 1997, it spawned even more adaptations, as fans further ported the code to countless devices, even on machines that were not designed to run games. The series started to lose mainstream appeal as the technology of the "Doom" game engine was surpassed in the mid-1990s, although fans have continued making WADs, speedruns, and modifications to the original. The franchise again received popular attention in 2004 with the release of "Doom 3", a retelling of the original game using id Tech 4, with an associated 2005 "Doom" motion picture. A reboot of the series, simply titled "Doom" and powered by id Tech 6, was released in 2016 and focused on returning to the fast paced action of the first two games.