In DOOM, the player takes the role of a tough space marine. The game begins on Phobos, a moon of Mars, where the player confronts the consequences of the secret experiments of the Union Aerospace Corporation. Forced to fight for his life and single-handedly try to stop the onslaught of demonic monsters before they can reach Earth.
id Software released DOOM for MS-DOS in 1993. It soon became a massive hit and is regarded as the game that popularized the first-person shooter genre. Since then the franchise has been continued in several sequels, starting with DOOM II: Hell on Earth in 1994. DOOM and many of its follow-ups have been ported to numerous other platforms, and to this day remains a favorite among gamers.