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.
Official versions of Doom
The first version of "Doom" for Windows was released under the name "Doom 95", on August 20, 1996. It was compatible with Windows 95 and up, and was able to use WADs from the MS-DOS versions. It also allowed users to set up multiplayer games much easier than in DOS. It was included with "Final Doom". The port was project-led by Gabe Newell and other later founders of Valve Corporation.