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 (2016 video game)
Months after "Doom" was released, Zen Studios developed a virtual pinball adaptation of the game as part of the "Bethesda Pinball" collection, which became available as part of "Zen Pinball 2", "Pinball FX 2" and "Pinball FX 3", as well as a separate free-to-play app for iOS and Android mobile devices. At E3 2017 Bethesda announced "Doom VFR", a virtual reality adaptation of "Doom", compatible with the PlayStation VR and HTC Vive headsets. In "Doom VFR" the player assumes the role of Mars' last survivor who, after being killed, gets his consciousness uploaded into an artificial network, and is tasked with defeating the demons and restoring the facility's operations, having an array of electronic devices and weapons at his disposal. The game was released on December 1, 2017.