doomguy
The player character of the Doom video game series. Also known as the Doom Marine and the Doom Slayer. Usually depicted as a muscular male space marine with green armor and a helmet.
Not much is known about Doomguy's life prior to the Doom games, but it is known that he was transferred to Mars in the first place because he had assaulted a superior officer for ordering soldiers to fire upon civilians. In the classic Doom games, the story is conveyed in the second person, and the player character is a silent protagonist.