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)
Early in development, rifts in the team began to appear. At the end of November Hall delivered a design document, which he named the "Doom Bible", that described the plot, backstory, and design goals for the project. His design was a science fiction horror concept wherein scientists on the Moon open a portal that aliens emerge from. Over a series of levels the player discovers that the aliens are demons while hell steadily infects the level design over the course of the game. John Carmack not only disliked the idea but dismissed the idea of having a story at all: "Story in a game is like story in a porn movie; it's expected to be there, but it's not that important." Rather than a deep story, he wanted to focus on the technological innovations of the game, dropping the levels and episodes of "Wolfenstein" in favor of a fast, continuous world. Tom disliked the idea, but the rest of the team sided with Carmack. Hall spent the next few weeks reworking the "Doom Bible" to work with Carmack's technological ideas. Hall was forced to rework it again in December, however, after the team decided that they were unable to create a single, seamless world with the hardware limitations of the time, which contradicted much of the document.