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.
LucasArts
After the unprecedented success of id Software's "Doom", the PC gaming market shifted towards production of three-dimensional first person shooters. LucasArts contributed to this trend with the 1995 release of "", a first person shooter that successfully transplanted the Doom formula to a Star Wars setting. The Dark Forces Strategy guide claims that development was well underway before Doom was released and that the game was pushed back once Doom hit shelves so that it could be polished. The game was well received and spawned a new franchise: the "Jedi Knight" games. This began with the sequel to "Dark Forces", "" released in 1997; this game reflected the changing face of PC gaming, being one of the first games to appreciably benefit when used in conjunction with a dedicated 3D graphics card like 3dfx's Voodoo range. The game received an expansion pack, "Mysteries of the Sith", in 1998 and a full sequel in 2002 with "". 2003's "" can be seen as a spin-off from the series, but was less well received by reviewers, who complained that the franchise was becoming formulaic.