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: The Boardgame
Doom: The Boardgame is an adventure board game for two to four players (two to five in the 2016 edition) designed by Kevin Wilson and published by Fantasy Flight Games in 2004. The game is a based on the "Doom" series of first-person shooter computer games, though it resembles "Doom 3" more than it does the first two "Doom" video games.