Doom (1993 video game)
Doom (typeset as DOOM in official documents and stylized as DooM in other media) is a 1993 first-person shooter (FPS) video game by id Software. It is considered one of the most significant and influential titles in video game history, for having helped to pioneer the now-ubiquitous first-person shooter. The original game was divided into three nine-level episodes and was distributed via shareware and mail order. The Ultimate Doom, an updated release of the original game featuring a fourth episode, was released in 1995 and sold at retail.
Official versions of Doom
"Doom" is one of the most widely ported first-person shooter video games. Starting with the original MS-DOS PC version (released as shareware on December 10, 1993), it has been released officially for a number of operating systems, video game consoles, handheld game consoles, and other devices. Some of the ports are replications of the MS-DOS version, while others differ considerably, including modifications to the level designs and monsters, with some ports offering content not included in the original MS-DOS version.