Within the Doom series, Doomguy is a demon hunting space marine dressed in green combat armor who rarely speaks on-screen.

He has been featured in several other game franchises, including his likeness as a customizable skin for the Mii Gunner character in Super Smash Bros.

[7] In 2021, Doom Eternal's director Hugo Martin revealed that a female Doomguy was nearly added to the game, but was scrapped due to how much of an endeavor it would have been.

id Software chose a somewhat generic pictorial representation of the Marine for the box art, as well as for gameplay purposes (damage feedback and story transitions).

The box art for the original Doom, which was done by Don Ivan Punchatz, shows the Doomguy firing a weapon (which does not make an appearance in the final game) at a horde of Demons below him as one of them grabs his left wrist, while a fellow Marine (similar battle dress uniform, except in grey) in the background is rushing to catch up.

This image is also used in the introduction screen of Doom, where the Doomguy has a shotgun clutched in his left hand, while a Baron of Hell kills the grey-uniformed Marine in the background.

For the player's in-game avatar in single-player mode (also seen at the ending of Doom II), the Doomguy wears green armor and a light grey space helmet that conceals his facial features.

He wears green armor with exposed arms, his facial features are not concealed, his muscular build is less exaggerated, and he has thick black hair.

The character remains silent throughout and is portrayed as tough and fearless in the game's cut scenes; generally only glaring at the demons he sees.

This character is also shown to take enjoyment out of using the demonic powers available in the game, as cutscenes show him grinning with glee upon discovering the Artifact.

The DOOM Slayer's eyes and nose can be made out through the visor of his helmet on the game's box art, the 3D model viewer, and his Quake Champions appearance.

[14] It has been also noted for its visibly irreverent tone conveyed by its hand gestures, fist bumping a small Doomguy figurine,[15] and a late-game moment where the DOOM Slayer decides to make a backup of a friendly AI rather than erasing it.

[16][17] Doom Eternal is more detailed about the Slayer's characterization relative to the previous episode: Doomguy is seen without a helmet in first-person, and for the first time in the series' history, he also speaks, voiced in a flashback cutscene by Matthew Waterson.

A Marine's corpse appears in a secret area in Duke Nukem 3D; they are seen halfway through their Classic Doom death animation clutching their throat and gurgling, surrounded by various Satanic iconography.

[36] In the Sega Saturn version of Quake, the Marine briefly appears at the end of the bonus feature "Dank & Scuz".

[38] A Doomguy costume was made available in Fall Guys: Ultimate Knockout, along with Cyberdemon and Cacodemon on January 12, 2021, for a limited time.

[56] In 2009, GameDaily included the Doom Marine on its list of "ten game heroes who fail at the simple stuff" for his inability to look up and down in the original series.

[57] UGO Networks ranked the Marine fourth on its 2012's list of best silent protagonists in video games, noting his courage to continue in silence even when faced with Hell's army.

[65] In his column Extra Punctuation Ben Croshaw wrote that the game "establishes the player character as someone who doesn't give a flake of dried Marmite for the larger context, and only cares about ridding the planet of demons.

"[66] Additional praise was given for the subtlety of Doomguy's expressions: James Stephanie Sterling noted that both the "glory kill" moves and additional pieces of animation "reinforce his consistent sense of irreverence",[15] Sterling,[15] along with a number of other reviewers including Houghton,[17] Donlan,[65] and Croshaw from Zero Punctuation noted the initial moment of the game with Doomguy throwing away a communications monitor while a mission briefing plays as a minimalistic, but effective way to convey the entire character's motivations.

[67] Doomguy was a popular choice for inclusion in the roster of Super Smash Bros. by fans,[68] and also by multiple websites, including PC Gamer,[69] GamingBolt,[70] GameRevolution,[71] and Shacknews staffs.

One popular variant involving them has fans creating and sharing images of his hypothetical visage using 3D graphics software program and AI enhancements on social media platforms.

[87] In 2020, subscribers to Twitch Prime were entitled to an 1980s style blonde mullet themed Doom Eternal skin for Doomguy.

[88] In April 2021, the Xbox brand released a series of portraits featuring Doomguy and Master Chief to commemorate Microsoft's acquisition of Bethesda Softworks' parent company ZeniMax Media.