Doom is a first-person shooter game developed and self-published by id Software. Released on December 10, 1993, for DOS, it is the first installment in the Doom franchise. The player assumes the role of a space marine, popularly known as the Doomguy, fighting through hordes of undead humans and invading demons. The game begins on the moons of Mars and finishes in hell, with the player traversing each level to find its exit or defeat its final boss.
Doom was the third major independent release by id Software, after Commander Keen (1990–1991) and Wolfenstein 3D (1992). In May 1992, id started developing a game focused on fighting demons with technology, made using a new 3D game engine from developer John Carmack, with a darker style than their previous titles. Designer Tom Hall initially wrote a science fiction plot, but he and his work were removed from the project, with the final game featuring an action-heavy design from John Romero and Sandy Petersen. The game was self-published by