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 (2016 video game)
According to Stratton and Martin, movement is the game's most important pillar. To help keep movement fast, weapon reloading was excluded and levels were designed to discourage players from hiding. On January 25, Stratton confirmed the game's feature of non-linear exploration and stated that combat is the game's focus and that the difficulty of the game was raised with the aim of creating an ultimate first-person shooter. On March 31, 2016, the release date of the "Doom" beta, a cinematic trailer directed by Joe Kosinski was created to evoke the game's three core pillars: incessant combat, terrifying demons, and powerful guns.