Doom (1993 video game)
Because id planned to self-publish the game, as the game neared completion they had to set up the systems to sell the game. Jay Wilbur, who had been brought on as CEO and sole member of the business team, planned the marketing and distribution of "Doom". He felt that the mainstream press was uninterested in the game, and as id would make the most money off of copies they sold directly to customers—up to 85 percent of the planned US$40 price—he decided to leverage the shareware market as much as possible, buying only a single ad in any gaming magazine. Instead, he reached out directly to software retailers, offering them copies of the first "Doom" episode for free, allowing them to charge any price for it, in order to spur customer interest in buying the full game directly from id.
Doom (1993 video game)
The popularity of "Doom" led to the development of an expanded version, "The Ultimate Doom" (1995), which includes a fourth episode. Additionally, numerous ports of the game have been released by other companies. An unofficial port of "Doom" to Linux was released by id programmer Dave Taylor in 1994; it was hosted by id but not supported or made official. Official ports of "Doom" were released for AmigaOS in 1993, 32X, Atari Jaguar, and Mac OS in 1994, Super Nintendo Entertainment System, PlayStation, and Windows in 1995, 3DO in 1996, Sega Saturn in 1997, Game Boy Advance in 2001, Xbox 360 in 2006, iOS in 2009, and PlayStation 3 in 2012. Some of these were bestsellers even many years after the initial release. "Doom" has additionally been ported unofficially to numerous platforms; so many ports exist, including esotera such as smart thermostats and oscilloscopes, that variations on "It runs "Doom"" or "Can it run "Doom"?" are long-running phrases.