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.
Doomguy
The Doomguy, commonly known as the Marine and referred to as the Doom Slayer in the rebooted portion of the series, is the unnamed player character in the "Doom" video game franchise of first-person shooters created by id Software, and its sequels and spin-off media. He is a space marine dressed in green combat armor who does not speak onscreen.