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In the original Doom, he's a nameless marine sent to do grunt work on Mars after an incident over not wanting to kill innocent people on Earth causes him to lash out against his commanding officer. During his dull-as-dirt assignment, it seems the scientists of the Union Aerospace Corporation (UAC) are conducting experiments with teleporters when everything falls to pieces. One of Mars' moons and a UAC outpost, Deimos, completely vanishes into the ether while another, Phobos, is immediately overrun by The Legions of Hell. Everyone is either slaughtered or converted into minions of the invaders. The marine dispatches to Phobos, where he proceeds to clean up the situation as brutally as possible. During his one-man war against the forces of Hell, he discovers what became of Deimos (ended up floating above Hell itself) and then treks down to the surface of Hell to finish the job.When the sequel, Doom II: Hell on Earth, rolls around, the marine had just finished ripping Hell a new one when a distress signal alerts him that the armies that invaded the Mars moon bases have now breached their way to Earth. The humans who are able to escape the genocide decide their only recourse is to escape the planet but their exit route is barricaded by the invaders and obstructed by a force field they set up. The marine is called to break the line of defense and deactivate the force field on behalf of the other humans so they may escape, which he does and remains as the last human on Earth. However, further communication from the escaped humans reveals that the epicenter of the invasion is still on Earth, allowing the marine to finally push back against the invaders. After fighting their forces he decides to cross back into Hell yet again, this time with the intent of making sure they can never invade anywhere ever again. After this trek through Hell, he manages to essentially destroy it, literally leaving no place for the damned to go once they die. Come Doom 64, Earth is finally mopping up from the attacks from the first two games, when something resurrects all the demons on Phobos and Deimos, prompting another assault that ends in the marine storming Hell a third time and apparently wiping demons off the face of Hell completely by killing the Mother Demon.In Doom 3, since it serves as a Continuity Reboot, Doomguy is a whole new marine, who simply happens to have the bad luck of being transferred to the UAC's Mars base the day Betruger unleashes hell upon the planet. Through determination, sheer luck, and large volumes of gunfire, he manages to stop the invasion and close the portals, trapping Betruger in Hell after slaying Hell's ultimate warrior, the Cyberdemon.In Doom 3: Resurrection of Evil, yet another new marine takes up the mantle of Doomguy, this time a marine Engineer exploring Mars as part of an expedition to try and figure out just what Betruger actually did. Discovering a demonic Artifact that Betruger attempts to use to generate a second invasion, he fights his way into Hell and slays Betruger, stopping his plans cold.In Doom 3: The Lost Mission, the player takes up the role of The Bravo Marine, the sole survivor of the massacred Bravo Team that Doomguy found in the Enpro Plant. Tough enough to survive the carnage, after being dragged through a vent into a different part of the Plant, he fights his way up to Exis Labs, where he travels into Hell at the behest of the surviving scientist Dr. Richard Meyers. His mission: to destroy a teleportation platform that was drawn through the dimensions, which could possibly be used to invade Earth from Hell.In Doom (2016), the marine goes back to basics again. Awakening in a stone sarcophagus in a UAC base on Mars to find the base has literally gone to Hell, and he has to butcher his way through armies of demons and put and end to the madness. Something he does with aplomb, evidently having considerable experience at doing so — to the point that the demons call him "the Doom Slayer". It is later revealed he's the Sole Survivor of the "Night Sentinels", a group of demon-slayers from the now Hell-consumed world of Argent D'nur and rampaged through Hell before, the demons unable to kill him, only to seal him away in the Sarcophagus the UAC found him in. He's implied to be the same Marine from Doom 1 and 2.
- Action Hero: In Doom, Doom II and Doom 2016. The Doomguy is a straight-up balls-to-the-walls killing machine who slaughters his way through the forces of Hell without qualm or respite.
- Action Survivor: In Doom 3 and The Lost Mission, due to the game's restructuring to a more actiony Survival Horror setting. Zigzagged in Resurrection of Evil; the character survives to the end of the game, but he's on a Suicide Mission and he knows it, though it's ambiguous if he dies or not.
- Ambiguously Human: The Doom Slayer seems human, but he has strange runes etched on him, he doesn't flinch when exposed to demonic energy for the sake of a buff, and his lost homeworld, Argent D'nur, may be either an alien planet or an Alternate Universe Earth.
- And Show It to You: The Doom Slayer is capable of tearing out hearts as part of his Glory Kills mechanic. The gore nests likewise require him to rip out their beating hearts in order to shut them down.
- Anti-Hero: The classic Doom and especially the 2016 version. While it's very clear that he has a preference for ripping through demon hordes with psychotic enthusiasm, as well as a penchant for violence little can match, he is still on our side for the right reasons.
- Badass: Seriously, how is he not one if he practically destroys Hell by the end of the second one.
- Awesome McCool Name: Doomguy. Can't live up to that in badassery.
- The 2016 game gives us the name the demons refer to Doomguy by: the Doom Slayer.
- Badass Grandpa / Badass Family: Doomguy is implied to be "William J. Blazkowicz III" which makes him a blood relative of William J. Blazkowicz and a direct descendant of Billy Blaze (A.K.A. Commander Keen, William J. Blazkowicz II).
- Badass Normal: With emphasis on Badass.
- Empowered Badass Normal: Every Doomguy bar the Bravo Marine makes use of something that puts him beyond the pale. The Original Doomguy makes use of demonic power ups, at least one of which is fueled by captive souls. The Marine in Doom 3 wields the Soul Cube, an ancient Martian Magitek device that feeds on demonic essences and repays him with life energy. The Engineer in Resurrection of Evil carries the Artifact, a soul-eating demonic heart that can bestow Super Strength, Super Speed and Invulnerability upon him. The Doom Slayer collects assorted scientific and magical tokens to power himself up; argent cells to enhance his gear and health, enhancement tokens to upgrade various physical or equipment traits, and demonic runes to magically augment his capabilities.
- Charles Atlas Superpower: There's technically nothing supernatural behind his Berserk Punch and ability to withstand direct hits from a rocket launcher, at least in the pre-2016 games. The 2016 game has the Doom Slayer using demon-crafted/upgraded Powered Armor fueled by hellish Argent Energy and bolstered with magical runes.
- One-Man Army: It's you and every demon that the depths of Hell can throw at you, get to it.
- Bruiser with a Soft Center: Doomguy has a pet rabbit named Daisy.
- Awesome McCool Name: Doomguy. Can't live up to that in badassery.
- Bare Your Midriff: At least according to the box art of the first Doom. Male example, courtesy of Clothing Damage.
- Berserk Button: Any demon having the audacity to be alive in front of him. To Doomguy, the only good demon, is a DEAD demon.
- Blood Knight: The original Doomguy looks like this. He smiles sadistically every time he obtains a new weapon and grits his teeth when he fires with it.
- Taken even further in Doom 4, if the brutality of the Glory Kills are any indication.
- The Berserker: In any game besides 3, he utterly wipes entire armies of demons with unimaginable ferocity.
- Chainsaw Good: A chainsaw is a suped-up replacement for your fists as a melee attack option in the classic games and the core game of Doom 3. In the original games in particular it's often held up as the best weapon you can use, if you're skilled enough. In Doom 2016, it's a special weapon that requires fuel cells to use, with bigger enemies taking more fuel to use it on, but it's a One-Hit Kill attack that results in a massive loot-drop, more so than even an ordinary Glory Kill.
- Character Title: In the 2016 game, after his off-screen rampage prior to the game's beginning, the demons fearfully refer to him as the Doom Slayer.
- Chronic Hero Syndrome:
- Classic series: After returning from Hell at the end of the first game, he volunteers to lead the strike force to recapture Earth's last spaceport and evacuate the last surviving humans. Then after that he volunteers to go back into Hell to reverse the invasion.
- The Marine: Fights his way into Hell to use the Soul Cube to seal Hell off from the mortal plane, in order to stop a full-fledged demon invasion.
- The Engineer: Invades Hell to return the Artifact and stop the demon invasion, even knowing it'll be a one-way trip, as he has to turn off the life support in the Mars base to get enough power to teleport there
- The Bravo Marine: Fights his way into Hell to destroy an experimental teleporter that could be used to allow them to invade Earth even if the Delta Labs teleporter is destroyed, even with no way of knowing that this won't leave him stranded in Hell forever.
- The Dreaded: In the 2016 reboot. All of Hell tried to keep him sealed away during their invasion of Mars for as long as possible, and they only managed to stop him the first time by dropping an entire temple right on top of him. When the UAC found his tomb, the demons began to freak out, fighting with "a desperate ferocity" that the UAC had never seen before. There's a reason he's generally referred to as the Doom Slayer (also Hell Walker, the Unchained Predator, Scourge of Hell).
- Dumb Muscle: The Doom Slayer may be a lethal killing machine, but he rarely seems to indicate much more than a basic cunning and a knack for slaughtering everything in his way, as shown in his many moments of Cutscene Incompetence. Of course, since he's hopped up on demonic Argent Energy and probably mentally broken from the trauma of everything he's undergone, it's quite understandable.
- Did You Just Punch Out Cthulhu?: Each of the people who have held this title have taken on demonic horrors that have made the even the Elite Mooks look like babies and bust a cap in the ass of each one of them.
- Featureless Protagonist: You get to see his features during a few cutscenes in Doom 3 and ROE, but otherwise, you never see under his helmet, unless you count his classic "Doomguy's face as health indicator". The opening of Doom 2016 also shows his hands and feet, but nothing else.
- Finishing Move: In Doom 2016, the Doom Slayer can do these to demons, something borrowed from the popular Brutal Doom mod. It's actually encouraged to do this, as enemies finished off with a "Glory Kill" are guaranteed to drop health pickups, and Glory Kills are the only way to finish off bosses.
- Godzilla Threshold: Is this for Samuel Hayden in Doom (2016), as waking him from his can leads him to destroying everything related or even concerning Hell, including the extremely powerful Argent energy that the company had been exploiting Hell for.
- Guest Skater: Doomguy is a secret character in the PC version of Tony Hawk's Pro Skater 3, due Gearbox Software being the one who ported the Windows version of the game.
- Helmets Are Hardly Heroic: Averted in the classic games, where the box-art and in-game sprites show that Doomguy is wearing a helmet, but played straight in Doom 3 and ROE, where the Marine and the Engineer are consistently bare-headed throughout the cutscenes. Left ambiguous for the Bravo Marine. Doom 4 justifies its HUD having it be displayed on the Doom Slayer's visor.
- Heroic Lineage: In the Wolfenstein RPG, it's implied that Doomguy is a descendant of B.J. Blazkowicz.
- Heroic Mime: Never speaks in any of the games.
- He Who Fights Monsters: Given he's running around in a suit of armor that feeds on Argent Energy, the same Hellish power that the UAC used to create its Possessed and Revenants, there's a pretty strong chance that the Doom Slayer has actually become a demonic entity himself and just hasn't noticed it!
- Horrifying the Horror: The monsters he butchers on a regular basis are bogeymen that parents tell their kids stories about to behave at the very least. And the Doomguy himself? He fills that role for them
- Really driven home in Doom 2016, where various data pads (on Mars) and artifacts (in Hell) make it clear just how terrible the Doom Slayer is for the denizens of Hell. It was said that the demons fought with unprecedented ferocity to prevent the UAC from retrieving the Doom Slayer's sarcophagus.
- Humanoid Abomination: The Doom Slayer begins the game with strange runes etched on him, and he doesn't flinch when exposed to demonic energy for the sake of a buff.
- Humanoid Alien: The Doom Slayer is actually a native from a Hell-consumed world called Argent D'nur. Of course, whether that's somewhere else in the galaxy or is in an Alternate Universe is never made clear in the game. Either way, he's not from Earth.
- Hyperspace Arsenal: Carries a huge arsenal of weapons in all games. Common to all are a pistol, a shotgun, a chaingun, a rocket launcher, a plasma gun, and the BFG-9000. He adds more to this depending on the game. It's a wonder he doesn't clank when he walks.
- Doom 2 adds the double-barrel "super" shotgun.
- Doom 64 adds the double-barrel shotgun and the Unmaker.
- Doom 3 adds the chainsaw, machine gun, grenades, flashlight and Soulcube.
- Resurrection of Evil adds the Grabber Gun, double-barrel shotgun, grenades, flashlight, machine gun and Artifact.
- The Lost Mission adds the Grabber Gun, double-barrel shotgun, grenades and machine gun.
- Doom 2016 adds the heavy assault rifle (which serves as a automatic sniper rifle or a machine gun as you need it, and has rapid-fire RPG alternate fire mode), the Gauss Cannon, the life-leeching Siphon Grenades, frag grenades, and a super shotgun. To these, the multiplayer mode adds two different sorts of electricity-shooting gun (the "electric flamethrower" Lightning Gun and the movement-fuelled Static Cannon), a burst fire rifle, a semi-auto heat-ray called the Hellshot, and a chargeable beam sniper rifle called the Vortex Rifle.
- I Choose to Stay: At the end of Doom 64, Doomguy decides to stay behind in Hell to make sure he's killed off the demons for good.
- It's Personal: Doomguy's various incarnations all have at least some personal investment in the fight against the demons. In the classic game, they killed Daisy, butchered all his buddies on Mars, and then invaded Earth. In Doom 3 and its expansion-packs, they killed all of his coworkers and fellow Marines on Mars. In Doom 2016, they corrupted and slaughtered his fellows in the demon-killing order of the Night Sentinels, and then destroyed his homeworld.
- Kill 'em All: Adopted this policy thanks to the repeated antics of the forces of Hell.
- Late to the Party: Doomguy's many incarnations are always too late to save any survivors after Hell initially attacks Mars. Inverted in The Lost Mission, though; canonically, Bravo Marine was the first marine of the Doom 3 continuity to breach Hell, beating the Marine into Hell as part of his quest to destroy the Hell-stranded teleporters.
- Legendary in the Sequel: Has apparently risen to this in Doom (2016), being The Dreaded to the forces of Hell and demanding their full attention to stop him from halting their invasion.
- Lightning Bruiser: Classic Doomguy becomes the "hard-hitting Fragile Speedster" version of this in Doom II; the original game had its moments of comparative "breather" time, but II was where the lightning-fast array of flying bullets and hellfire and the emphasis on constant movement that has become definitive of the series was really introduced. Taken Up to Eleven with the Doom Slayer; capable of outrunning virtually every demon and delivering punishing firepower, but in return, he needs to stay on the move constantly in order to survive, to the point the developers have stated "if you stand still, you're going to die".
- Nice Job Breaking It, Hero: The Engineer technically caused the second demon invasion of Mars by disturbing the Artifact. He makes amends by stopping it singlehandedly.
- No Official Name Given: While he has plenty of fanon names (and a couple arguably canonical), the Doomguy really has no official, cemented name. Romero stated that he wanted the players to feel like THEY were the marine and to invent their own personality.
- I Have Many Names: Current fanon candidates so far are Extermination Warriornote , Doom Marinenote , Buddy Dacotenote , Flynn Taggartnote , Stan Blazkowicznote , John "Reaper" Grimmnote , Doomnote , John Kane note , and John Stalvernnote . Doom (2016) brings up the name count even further, adding in such names courtesy of the demons as the Unchained Predator, the Hell Walker, and the Doom Slayer.
- Only Sane Man: It's quite clear he does not buy a single syllable of the shaky self-satisfied Well-Intentioned Extremist malarky the UAC keeps feeding him, because said malarky is also what keeps on provoking demonic invasions. To him, there's exactly three things in the world: Kill demons, save the world, and do it as efficiently as possible.
- Offscreen Moment of Awesome: During his rampage of Hell, as explained in Doom (2016), he fought a massive demon called the Titan, Hell's greatest champion, and now its massive skeleton litters the aptly named Titan region of Hell.
- Palette Swap: In multiplayer other marines become this.
- Pet the Dog: In the 2016 version, when Samuel Hayden tries to justify his actions in creating the mess over the intercom, the Doom Marine's response is to look down at the corpse of one of the victims, crack his knuckles, and smash the intercom in disgust.
- Powered Armor: The Doom Slayer's Praetor Suit, which was actually built/enhanced by a rogue demon to further his ability to kill other demons.
- Powered by a Forsaken Child:
- Inverted with the Soulcube in Doom 3 and the Unmaker in Doom 64, which feed on the life-essence of demons.
- The Artifact in ROE is fueled by human souls, which the Engineer collects from the various human casualties scattered throughout the base.
- The Praetor Suit in 2016 is fueled by Argent Energy, the same Hellish energy that the UAC has used to create several of the demons.
- Real Men Wear Pink: The thing that makes the events of Doom II truly personal? The demons killed his pet rabbit.
- Roaring Rampage of Revenge: Every. Single. Game is charting the course of one.
- Screw the Rules, I'm Doing What's Right: Doomguy does not care what the hell you want the demons for. Doomguy wants them all dead because no one can control demons, end of story.
- Sealed Good in a Can: Started off as this before Doom (2016), and the opening is literally him breaking out from his can.
- Slasher Smile: Whenever classic Doomguy picks up a new weapon, he gets a very psychotic grin.
- Sociopathic Hero: His narrations in the "cutscenes" and instruction manuals give this impression. Classic series only.
- Sole Survivor: Original Doomguy is the only marine who survived the initial invasion, though humanity as a whole survived, as the sequels reveal. The Doom 3 Marine, Bravo Marine and Engineer avert this. The Doom Slayer is this Up to Eleven: his entire demon-fighting order, his homeworld and his entire species has been wiped out by Hell.
- The Southpaw: Original Doomguy uses his left hand for punching and pistols, though he fires two-handed guns right-handed.
- Space Marine: A non-Super Soldier example.
- Suicide Mission: One man attempting to fight off an entire army of demons singlehandedly, and in multiple games invading Hell itself singlehandedly. Nobody's expecting you to come out alive. Zigzagged in all games save for ROE, where it's left ambiguous note , in that you complete your mission and live.
- Tranquil Fury: The Doom Slayer in the 2016 version never cries out in rage, not even once. But his mannerisms and the fact that he dispatches every demon, monster or zombie that gets in his way brutally and without a shred of mercy indicates that he is very, very angry, and considering what he's been through, who can blame him?
- To Hell and Back:
- In the first game he ends up in Hell after discovering where Deimos had teleported to and wanting to teach the demons a lesson on messing with him. He makes it out in one piece.
- In the second game, he voluntarily returns to Hell and completely wrecks the joint, to the point that he is left to wonder what would become of the evil men in the world when they die. In Doom 64 he kills the Mother Demon and apparently exterminates the demons completely. Also he stays in hell by choice.
- In the core Doom 3, the Marine tears his way out of Hell after destroying the Cyberdemon and throwing the Soul Cube into the opening, implicitly causing severe damage to Hell itself. The Bravo Marine (Lost Mission Doomguy) fights his way into Hell, destroys their teleporter, and escapes back to Mars, where he — and his comms buddy, Dr. Myers — survive to get evacced. Left ambiguous with the Engineer (ROE Doomguy), who kills the Maledict but is implied to have died in the process.
- Unstoppable Rage: The 2016 incarnation is the Sole Survivor of his realm, and considering how he utterly brutalises any demon or possessed that get in his way as well as his lengthy rampage before he was sealed away, one could agree that the experience has left him with...anger issues.
- Weapon of Choice: The Marine from Doom 3 seems to prefer the shotgun, as it's the weapon he's always seen wielding in cutscenes.
- If both covers of the 2016 game are anything to go by, the Doom Slayer prefers the Super Shotgun.
- Well-Intentioned Extremist: The Doom Slayer will stop at nothing to stop the forces of Hell from consuming another world, even if it means undoing any good the UAC could have done with Argent Energy.
- Would Not Shoot a Civilian: He may have issues, but he draws the line here. The backstory asserts that he was transferred to Mars because, upon being ordered to fire on a group of civvies by his commanding officer, he responded by beating the man so hard he got put in a body cast. Or possibly killed him, depending on where you look. Classic series only.
- A UAC official seeking to investigate the shady activities of Doctor Betruger in Doom 3.
- Almost Dead Guy: Is gravely wounded, but lives long enough to give his PDA (and access) to the Doomguy.
- Genre Savvy: Realizes that Betruger's plan is to lure the Marine fleet to Mars so the demons can hijack their ships to invade Earth, and tries to prevent the Marine and Kelly from sending out a distress call.
- Reasonable Authority Figure: Sent in because Betruger has gone off the deep end, and tries to solve it as best he can with the Marine's help.
- Swann's bodyguard.
- BFG: Is the one who brings it in the game. Gets stolen by Kelly / Saboath when he mortally wounds Campbell.
- The Doom Marine's superior officer in Doom 3.
Elizabeth Mc Neil
- A UAC scientist overseeing the operations in Resurrection of Evil.
- Heroic Sacrifice: Tells the Engineer to shut down life support in order power a teleporter to Hell, in order to ultimately destroy the Artifact.
- Morally Ambiguous Doctorate: Blew the whistle on Betruger's activities prior to Doom 3, and attempts to stop the demonic incursion in ''Resurrection of Evil]].
- The UAC research director on Mars in Doom 3. He is the one who causes the demonic incursion, but disappears when the Marine kills the Cyberdemon and shuts the connection between Hell and Mars. He has been transformed into the demonic Maledict, and serves as the final boss of Resurrection of Evil.
- Big Bad: Of Doom 3 and Resurrection of Evil.
- Meaningful Name: "Betruger" is German for "Deceiver" or "Trickster".
- Morally Ambiguous Doctorate: Firmly on the side of the demons.
- A genius scientist who serves as the administrator of UAC's argent facility in the 2016 game.
- Corrupt Corporate Executive
- Godzilla Threshold: Waking up the Doomguy. Hayden is well aware the Doomguy would wreak just as much devastation on the UAC's property as the demons, but wakes him up to stp them.
- Emergency Transformation: Upon being diagnosed with brain cancer, Hayden transferred his consciousness into an argent-powered robot body. The new Hayden is even more impressive a mind than he was when mortal.
- Morally Ambiguous Doctorate: Not a full-on Cultist like Olivia, but still very interested in exploiting Hell for profit.
- Name's the Same: An unrelated character in the Doom 3 tie-in novels was named General Hayden as well.
- Teeth Clenched Team Work: Gets frustrated by the Doomguy's destruction of UAC property, but needs his aid to seal the portal.
- A UAC Scientist in charge of the Lazarus Project in the 2016 game. She is responsible for unleashing the demons and resurrecting the staff as possessed.
- Big Bad: Causes the events of the game. Becomes the final boss, the Spider Mastermind.
- Deal with the Devil: Makes an agreement with the Demonic forces to help them invade Mars in exchange for godlike power.
- Determinator: Whatever you have to say about her, she's an unarmed, incredibly sick woman, who breaks open the gates to Hell in order to ''make the demons live up to their side of the bargain.
- Evil Cripple: Has a severe neurological disorder which forces her to wear an exoskeleton in order to walk; she refuses pain medication because she feels it dulls her mind.
- Morally Ambiguous Doctorate
- The AI running the UAC facility on Mars in the 2016 game.
- Heroic Sacrifice: Needs to be deactivated in order to stop the demonic incursion. Doomguy makes sure to back up his data, however.
Former Human Grunt, Sergeant, and Commando
- These were the soldiers on Mars (and then Earth) who were "conscripted" into the armies of Hell as front line defenders. They are essentially zombies and increase progressively in toughness (Grunts go down in a few shots while Commandos are armed with a chaingun and will take some punishment). Classic series only.
- Everything's Deader with Zombies: They're former Space Marines killed and animated (or possibly possessed) by demons.
- Gatling Good: Former Commando's Weapon of Choice.
- Glass Cannon: Former Commandos.
- The Goomba: These are the most common enemies you'll face, especially in the early levels.
- Hit Scan: The only enemies besides the Spider Mastermind with hitscan weapons, which can make them (Commandos in particular) very annoying to deal with.
- Shotguns Are Just Better: The Sergeant's weapon of choice, to the point his name in the source code is "Shotgun Guy".
- When Hell first breaks loose in Doom 3, the majority of the civilian population are quickly possessed by Demonic spirits and transformed into Zombies. Alone, they're very little threat, due to their lack of agility, but they have a nasty habit of popping up from behind corners.
- Chainsaw Good: Averted. An extremely rare variant with a hunched back and a leather mask shows up in a few spots in the late game that carries one.
- Dead Weight: Fat zombies are a little stronger and do more melee damage than thin ones.
- Everything's Deader with Zombies: They're created by Demonic Possession and arguably Technically Living Zombies (the very first zombie we see is converted straight from a living victim, implying at least some of the others you fight subsequently went straight from alive to zombie without dying first). They have some capacity for tool use, but these basic zombies are slow and stupid.
- Facial Horror: Some zombies come with this, depending on model type; thin zombies can have their lower jaw ripped clean off, whilst fat ones can have their face peeled off, exposing naked skull amidst bloody meat.
- Glass Cannon: They can deal surprising damage (especially the fat ones) but their slow speed and lack of durability cause them to be minimal threats unless they sneak up on you.
- The Goomba: These are the most vanilla enemies you face in the game.
- Zombie Gait: With a few exceptions, most shamble slowly towards you.
- Stands for "Zombie Security", the basic security troops of Mars are also quickly turned to Hell by the demonic spirits. They avert their civilian counterpart's Zombie Gait and attack with whatever weapons they had while alive. Though armor style varies slightly (shotgun-wielders are more likely to have open faced helmets), and weapon loadout varies from pistol to machine rifle to shotgun, they're all equal in strength. They equate to the Zombie Troopers of the classic series.
- Everything's Deader with Zombies: They're a variant of the regular Zombies above created from the former Marines serving security detail on Mars. Unlike their brethren, they display no cannibalistic traits and are fast agile, and smart enough to use projectile weapons and basic tactics.
- Eye Scream: Judging by what we see on one of the monitors, as well as the suspicious amount of blood of the machinegun variant's visor, that when they were possessed their eyeballs exploded.
- It Can Think: Unlike the normal zombies, these guys can use guns and cooperate with each other to kill you.
- Short-Range Shotgun: Averted: the shotgun-wielding variety has a narrow spread on his weapon, allowing him to shoot from far distances.
- Zombie Gait: Averted: these zombies retain their full mobility from life.
- Former elite UAC Marine troops corrupted by demonic energies and mutated into monsters that now serve as Betruger's personal warriors. Dramatically stronger, quicker and tougher than humans, they tend to fight with chainguns or their own bare fists.
- Combat Tentacles: Most Commandos sport a single long tentacle for their right arm, which they use to attack with.
- Everything's Deader with Zombies: They're a particularly different version of the Z-Secs above.
- Gatling Good: Later in the game, you encounter Commandos carrying chainguns.
- Made of Iron: Much, much tougher than the Z-Secs you've fought up until this point, even though they're barechested instead of wearing armor.
- UAC Marines who volunteered to be subjected to Argent Energy exposure experiments, the Possessed were ritually slain and surgically enhanced before being revived as part of the Lazarus Wave treatment. The result are cybernetically enhanced undead soldiers who proceeded to defect to the side of Hell when the demons broke loose. They are the 2016 equivalent of Zombie Marines and Z-Sec.
- Arm Cannon: Their guns are cybernetically meshed into their arms.
- Attack Reflector: Shotgun-wielding Possessed come with energy shields that will deflect your bullets back at you if you shoot them.
- Cyclops: Some of the possessed only have a single large eye on their head.
- Everything's Deader with Zombies: They're former UAC marines murdered by their superiors with guns, ammo and armor cybernetically meshed into their frames before being resurrected by experiments with hellish energies.
- Hit Scan: Shotgun-wielding Possessed have this trait.
- Human Sacrifice: Supposedly, they volunteered for it, but still.
- Humanoid Abomination: Former human beings that were exposed to demonic energy, transforming them into deformed feral monstrosities that don't look anything like their former selves.
- It Can Think: The Possessed formed out of former military soldiers or guards are fully cognizant and calculating, allowing them to use tactics as well as any living soldier. The UAC Handbook outright brags about their ability to think fast on their feet. The Unwilling don't seem to be as intelligent.
- Man Bites Man: If they kill the Doom Slayer, you get a scene of them ripping out his throat with their teeth.
- Shotguns Are Just Better: The Shotgun-wielding Possessed is one of the few enemies in the 2016 game with the Hit Scan trait, making them surprisingly dangerous, especially combined with their bullet-repelling shield.
- Super Soldier: They were created to be this.
- Turned Against Their Masters: Unfortunately for the UAC, they fell in with the demons when Hell broke loose on Mars.
- Underground Monkey: In addition to the Possessed, there's also the Unwilling, enslaved zombies that are the remnants of civilizations conquered and absorbed by The Legions of Hell.
- Hell's own soldiers. Monsters who are capable of throwing fireballs, Imps are the lowest level of demon that lead the charge for the forces that follow. In Doom 3 continuity, they have several "little brothers"; the two-headed Maggots, the teleporting Wraiths, and the ROE exclusive Vulgars.
- Death from Above: In the 2016 version, they like to cling to walls or ceilings and then pelt you with fireballs.
- Doing In the Wizard:
- Played straight in the novels; their fireballs are explained as the imps spitting up globs of a chemical that reacts with oxygen to ignite, which the imps then fling like baseballs of flaming snot.
- Zigzagged in Doom 3; the UAC file explains that the imps are able to create and manipulate globes of coherent plasma, but explains the scientists can't figure out how that's actually possible in the first place.
- Eyes Do Not Belong There: It's subtle, but the Doom 3 continuity version of the imp has multiple spidery eyes scattered over its face.
- Fangs Are Evil: Naturally.
- Fatality: In 2016, if they defeat the Doom Slayer, they knock him to the ground and then scurry over. Before he can recover, they turn him over, disembowel him with their claws, rip off his left arm and then brutally smash him in the face with it.
- Fireballs: Their primary ranged weapon.
- Fragile Speedster: The Maggot has just over half the health of the standard Imp, but moves much more quickly into close range, as it lacks a projectile attack.
- The Goomba: Your first properly demonic enemy that you encounter, and one you'll see throughout the games.
- Mooks: Hell seems to have a nigh-unlimited supply of Imps; expect to see them more than every other Demon combined.
- Multiple Head Case: The Maggot has two heads and three arms.
- Palette Swap: Nightmare Imps in Doom 64, just like the Spectres.
- Red Eyes, Take Warning: In the classic series.
- No Sneak Attacks: Imps have a tendency to helpfully screech and alert you to their presence before attacking.
- Spikes of Villainy: On their shoulders and knees. Classic series only.
- Underground Monkey: Doom 3 continuity only. The Imp, Wraith, Maggot and Vulgar are all considered part of the same family. Maggots are large, two-headed monsters that are quick-but-weak melee attackers, Wraiths are short, teleporting, scythe-armed variants of the Imp, and Vulgars are skeletal-looking imp-kin that are quicker, more agile and have better aim.
- Wall Crawling: In Doom 3 and its expansion packs, imps often show up by clambering out of vents, climbing up to balconies, crawling down walls or squeezing their way out of gaps in the walls. Meanwhile, it's an active combat tactic for them in Doom 2016.
Demon (a.k.a. "Pinky") and Spectre
- Hulking brutes that are tinted pink. These guys get in your face as they have no ranged attack but will do some damage. Spectres are versions of Demons that only appear as hazy outlines when encountered. Doom 3 gives an extensive redesign to Demons, but effectively they're the same.
- Attack! Attack! Attack!: All they know how to do is run at you and bite.
- Though often they'll run back and forth erractically to make it hard to hit them.
- Cephalothorax: Their classic design is basically a giant demonic face with arms up near the temples running around on two legs. They do technically have a torso, it's just their oversized head and forward-hunched position makes head and torso indistinguishable when viewed from the front.
- Eyeless Face: Doom 3 Pinkies are stated as being born with their faces covered in folds of flab and skin, so they have to chew through their own flesh to expose their mouth, which does nothing to reveal their eyes (if they have any).
- Food Chain of Evil: Pinkies won't hesitate to attack and eat other demons in the classic series, especially Imps.
- It was at least proposed in the reboot that Pinkies all have cybernetic legs because the demons cut off their old ones for food.
- Invisibility Cloak: For Spectre.
- Palette Swap: Spectre is this for the Pinky, being the same monster but with an Invisibility Cloak.
- Took a Level in Badass: Gained armor plating in the 2016 game.
- You Don't Look Like You: The reboot version from Doom 3 and Resurrection of Evil is a monstrous, eyeless quadraped that is... well, sort of a cross between a hornless bull and an overweight fanged piglet is reasonably close, only with its rear half chopped off and replaced by comparatively slender cybernetic legs.
- Disembodied horned skulls that are on fire. They can spawn from other enemies and simply fly into you as their only means of attack.
- Colour-Coded for Your Convenience: In Doom 2016, their flames are ordinarily blue, when they spot you, they turn a pinkish-red color.
- Expy: In Doom 3 the Lost Soul was redesigned as a floating, hairless human head with a rocket attachment at the back and wide-split jaws. In Resurrection of Evil they brought back the original "flaming horned skull" design and called it the Forgotten One.
- Flaming Skulls: Disembodied ones, at that.
- Fragile Speedster: They go down after only a few direct hits, but be careful with your aim; the speedy buggers can be tough to hit.
- Ghostly Glide: They move around through levitation, gliding through the air. In Doom 3, they make ghostly wails while they do so, for good measure.
- Glass Cannon: They can easily kill you, but they explode after 1-2 shots from the shotgun.
- Technicolor Fire: In the 2016 game, their flames can change color. When they're calm and just floating around, they have a blue flame, but when they see you, their flame turns a pinkish-red as they charge.
- Your Skull A 'Splode: After being killed. The explosion is merely an effect, though, and won't affect anything near the Lost Soul.
- Floating blobs of red flesh with a single green eye, horns, and a nasty maw. They mostly attack by spitting energy blasts at you, but they will take a bite out of you if you get close enough.
- Alien Blood: It bleeds red when shot, but its death sprites clearly have it bleeding blue.
- Fireballs: Their spit. In Doom 3 and Ro E, they actually shoot a sort of ball lightning.
- Ghostly Glide: Since they have no legs, they float to get around the battlefield.
- Interface Screw: Their lightning bolts will temporarily scramble your vision in the 2016 game.
- Mascot Mook: They're one of the most recognizable of common enemies and so get a lot of marketing.
- More Teeth than the Osmond Family: Their 2016 incarnation, which has four jaws (two horizontal, two vertical) all bristling with teeth.
- Shock and Awe: Their attacks in the 2016 incarnation are ball lightning, which if it hits will mess around with the Praetor suit for a bit.
- Slasher Smile / Technically a Smile: Constant one at that.
- You Don't Look Like You: Doom 3 redesigned the Cacodemons to look more like Pain Elementals, but they're similar to the older variety in gameplay.
Baron of Hell & Hell Knight
- Hell's elite. They are hoofed beings that walk upright and have a ram-like head, basically giant Satyrs. The Hell Knights are brown while the Barons are pink and tougher. They throw bolts of green fire and can slash with their hands. The Barons first appear at the end of the first episode of Doom as the final boss.
- Alien Blood: They also bleed red when shot, but their death sprites clearly have them bleeding green.
- Though the Barons bleed red in Doom 64.
- Big Red Devil: They're pink and brown, respectively, but they have a fairly classical goatman/minotaur-like look, with furry legs, cloven hoves and huge horns.
- Contractual Boss Immunity: Barons and Hell Knights are immune to their own and each other's fireballs (though this is changed in Doom 64.)
- Degraded Boss: From Episode 2 onward in the classic game. They're also far less imposing in 2016 than they were in Doom 3.
- Dual Boss: A pair of Barons at the end of Episode 1.
- Eyeless Face: Played with in Doom 3 and Resurrection of Evil; while they do have eyes (they're in the fleshy parts on both sides of their mouths), they're tough to see, giving them this appearance anyway - perhaps as a contrast to the multi-eyed Imp. Played straight in the 2016 game.
- Fatality: In the 2016 game, if the Barons of Hell defeat the Doom Slayer, they'll knock him to the ground, pin him under a hoof, and then rip off both his legs. Then they'll grab his head in one hand and crush it. The Hell Knights will just crush him to a pulp with three Megaton Punches.
- King Mook: In Doom 3, Hell Knights are absolutely massive.
- Palette Swap: The Hell Knight is one. Oddly, he uses a separate set of sprites, but is for all other intents and purposes treated as the same entity as the Baron of Hell, just weaker.
- You Don't Look Like You: In Doom 3 and its spin-offs, the Hell Knight/Baron of Hell split was removed and both lost their traditional look, instead becoming armor-plated monsters that look more like hellish Golems. In Doom 2016, the split was reintroduced; Barons of Hell are still classical devil-types, while Hell Knights retain their Doom 3 appearance as a base.
- Another floating blob of flesh with a single eye and unpleasant mouth. These guys are brown (unlike Cacodemons, which are red). They can create Lost Souls, which is how they attack. Classic series only.
- Asteroids Monster: They release three more Lost Souls upon death.
- Red Eyes, Take Warning
- Mook Maker: Can produce an endless array of Lost Souls.
- A walking skeleton with the ability to fire rockets off its shoulders. Exactly why they look so humanoid is never explained, except for in Doom 2016, which gives them an all too chilling reason...
- And I Must Scream: The 2016 version of the Revenant is a former human being who was effectively Flayed Alive and implanted with cybernetic components — all of it without anesthesia — before being subjected to a weeks-long Lazarus Wave exposure that finally killed them from sheer pain... only to bring them back as undead pseudo-demons, suffering forever.
- Body Horror: In the 3D games, which makes them far more disturbing than mere animated skeletons with rocket launchers.
- Death from Above: Revenants in the 2016 game have jetpacks that allow them to take flight and launch a barrage of missiles from the air. Thankfully, they can only do this in multiplayer.
- Dem Bones: With some armor and rocket launchers. Doom 3 gives them actual flesh, it's just translucent save for the blood vessels and entrails, whilst the 2016 Revenants are once-human bodies flayed down to mostly bones and guts.
- The Dog Bites Back: Despite them willingly serving themselves up to be turned into some demonic horror by the UAC to be used as a weapon, one doubts that the fact that they are going to have to "live" with constant unending agony isn't going to give them second thoughts.
- Demonic Spiders: By far the most dangerous enemy in Doom except for the Archvile and the bosses.
- Everything's Deader with Zombies: Like the Possessed, the 2016 version of the Revenant is a Human Sacrifice who was brutally mutilated to death, upgraded with cybernetic implants, and then brought back to life with demonic energies.
- Fatality: In the 2016 game, if they defeat the Doom Slayer, they will rip off both of his arms, slap him with one of his own arms for added insult, and then crush his skull with a single punch.
- Homing Projectile: One of the rockets he can launch.
- Human Sacrifice: As with the Possessed, in the 2016 game, they were humans who volunteered to be butchered and reanimated to become the UAC's deadly new living weapons.
- Macross Missile Massacre: In the 2016 game, they can shoot a lot of rockets, very quickly.
- Super Soldier: They were intended to be the next step up from the Possessed in the UAC's arsenal.
- Turned Against Their Masters: Unfortunately for the UAC, the Revenants were no more loyal in the face of a demonic outbreak than the Possessed, though can you really blame them?
- Was Once a Man: Revenants in the 2016 game used to be humans.
- Really fat demons with fireball cannons for arms.
- Arm Cannon: Two of them.
- Cthulhumanoid: Their Doom 3 redesign has this sort of look.
- Damage Sponge: They can suck up a lot of ammo before going down.
- Fat Bastard: Larger that most demons, and designed to look really fat.
- Giant Mook: They're one of the biggest demons in the game.
- Ground Pound: Mancubi can do this to attack you if they feel you're too close in the 2016 game.
- Playing with Fire: They wield implanted Arm Cannons that shoot fireballs at enemies. In the 2016 game, they also have a flamethrower attack for if you try to get up close and personal.
- Mighty Glacier: Slow, but their durability and damage output can be frightening.
- Organic Technology: The mancubi in Doom 2016 have organic Arm Cannons. More "old school" mancubi appear as the "Cyber-Mancubus" enemy variant.
- A smaller version of the Spider Mastermind, they are strange beings mounted on four metallic legs with a plasma gun bolted to the front.
- Brain in a Jar: And by "jar" we mean a cybernetic weapons platform.
- Giant Spider: Not as big as Spider Mastermind, but still quite big.
- Kaleidoscope Eyes: Normally its eyes are blue, but when attacking the eyes turn red.
- Red Eyes, Take Warning: When shooting.
- A being that can revive fallen monsters. Also attacks the player with flames that can erupt underneath the target.
- Always Accurate Attack: Its flame attack will always hit you unless you can put something between it and you to block it from seeing you. Trees or other monsters won't work, for the record - you have to find a wall.
- Averted in the Doom 3 continuity. It's hard to dodge, but as it's a stream of fire, you can get around it or block it off.
- Boss in Mook Clothing: Has a lot of health, can resurrect fallen enemies, and has a powerful attack that can only be dodged by getting out of his line of sight.
- Evil Laugh: The way he lets you know how much you are screwed.
- Heal It with Fire: The way he resurrects his fellows.
- Kill It with Fire: How he deals with you. The fire doesn't hurt you, it only marks the place for the explosion he'll cause.
- Mook Maker: In Doom 3, instead of resurrecting fallen enemies, he summons more enemies.
- Moral Myopia: Screams "why?!" upon death because he is Hell's "evil healer". He doesn't understand why anyone would want to kill him since he's only doing good by resurrecting his fellow demons. And then burning you to death.
- A heavily augmented demon encountered in Doom 3: Resurrection of Evil and Doom 3: The Lost Mission. Sort of a hybrid of Hell Knight and Mancubus.
- Arm Cannon: Two flame cannons, like the Mancubus.
- Beam Spam: What makes him feel more dangerous than the Mancubus; his attacks do the same damage, but he launches volleys of them with far greater speed than the Mancubus.
- Hollywood Cyborg: Cybernetic legs, guns for arms, and an electronic screen implanted into his face that displays snarling teeth.
- Lightning Bruiser: He's actually squishier than the Mancubus (825 health to their 1000 health), and less potent in melee (he barely does half the melee damage they do), but he moves — and shoots! — a hell of a lot quicker and can easily kill you if you're not careful.
- Playing with Fire: Hurls rapid-fire volleys of fireballs, like the Mancubus.
Bosses (original series)
- The final boss of episode 3 of Doom. A gigantic version of the Arachnotrons, she too is a creature mounted upon four titanic metal legs and a chaingun for defense.
- Big Bad: In the plot of the original game and in the 2016 reboot.
- Brain in a Jar: And by "jar" we mean a cybernetic weapons platform.
- Contractual Boss Immunity: To splash damage. This effectively gives her nearly 70 percent resistance to rockets.
- Gatling Good: Spidey's original incarnation has her blasting off with a super chaingun.
- Giant Spider: A mechanical one, in fact.
- Good News, Bad News: As noted in the Doom II manual, the Spider Mastermind has a souped-up chaingun as her main weapon:
- Monster Is a Mommy: Not actually true, but the manual refers to the Mastermind as the mother of the Arachnotrons.You guess the Arachnotrons had to come from somewhere. Hi, Mom.
- Red Eyes, Take Warning
- Hell's most fearsome creature and the boss of episode 2 of Doom. He is a towering creature with metal legs and a rocket launcher.
- Arm Cannon: A rocket launcher, to make things worse.
- Artificial Limbs: Metal legs and a cannon arm.
- Breakout Villain: First he was The Dragon to the Spider Mastermind. In subsequent games, he's either the the last obstacle before the Icon of Sin (Doom 2, Plutonia) or just the Final Boss (Doom 3, No Rest for the Living). Nowadays he's one of the most recognizable elements of the franchise.
- Climax Boss
- Contractual Boss Immunity: Like the Spider Mastermind, to splash damage. This effectively gives him nearly 70 percent resistance to the player's rockets.
- Cyborg: "Half unfeeling machine, half raging horned devil", as said by the SNES manual
- The Dragon: In the first game, he's only the second in command; it's the Spider Mastermind who's the true leader of the invasion and the final boss.
- I'm a Humanitarian: His lair in the original DOOM features several half-eaten Barons of Hell strung up on the walls, the idea being to make you worried about what could possibly be dangerous enough to look at the Barons — who up 'til now were your most prominent Demonic Spider enemy — and think "Dinner!"
- Lightning Bruiser: He's the fastest-moving monster in the game apart from the Archvile and the Lost Soul when it's charging, has 4000 HP and an immunity to splash damage, and can easily splatter an unwary player who's a Fragile Speedster/Glass Cannon by comparison.
- Mascot Mook: Not anywhere near as popular as the Cacodemon, but still the second most recognizable enemy in the game and appears on the cover art of Doom II.
- One-Hit Kill: Gains the ability to stomp on the player for an instant kill in Doom 64 (as well as the Brutal Doom mod.)
- Wake-Up Call Boss: Twice as much health as the "Baron Brothers" combined and able to splay you across the floor in two direct hits. Hope you figured out how to circlestrafe by now.
Icon of Sin
- The leader of Hell and the final boss of Doom II. Spawns demons to defend itself.
- Attack of the 50-Foot Whatever: All the player ever sees is it's head, but the ending implies that it's massive enough to destroy most of Hell in its death throes.
- Big Bad: Absolute ruler of Hell in the classic games.
- Chekhov's Gunman: Its face shows up on stage architecture in both games before the player even knows about its existence.
- Death by Cameo: Mechanically speaking, the "demon" is actually a big wall with a hole. The actual entity that takes damage is the head of John Romero impaled on a spike.
- Mook Maker: Its only real attack in the game is spawning an endless supply of other enemies.
- No Name Given: The boss doesn't actually have an official name; "Icon of Sin" is the name of the level. But since there's nothing else in the level, the fandom uses the level's name as the boss's name out of convenience.
- Subliminal Seduction: The sound that plays when he first sees you is backmasked."Oremor nhoj, em llik tsum uoy, emag eht niw ot."
- The final boss of Doom 64. A demon with the ability to resurrect other demons much like the Arch-Vile (only making them stronger than before.) Single-handedly rebuilds the demon army, forcing the marine to put them down another time.
- Big Bad: The ultimate boss of Doom 64, and technically superior even to the Icon of Sin, going by the lore.
- Gameplay and Story Segregation: Apparently all she needs to do is pass by a demon and it comes back to life. You fight her in a room likely covered in dead demons (unless you use the Demon Artifacts to seal off the portals before any come through) and they all stay dead.
- Kill It with Fire: Her primary attack
- Monster Is a Mommy: Subverted. She's called the Mother Demon, but according to the story she just resurrects dead demons instead.
Bosses (Doom 3 and Resurrection of Evil)
- A large monstrosity with the body of a spider with a humanoid torso, similar to a centaur.
- Degraded Boss: Much like the Barons of Hell and even the Cyberdemons of the original games.
- Fan Disservice: The Making of Doom 3 book states she was built with the concept "Sexy + Gross = Creepy".
- Monster Is a Mommy: Possibly. Earlier in the game the player hears "They took my baby" said by a voice similar to the Vagary's.
- Also, given that the Vagary's boss fight takes place at the end of the Alpha Labs, which is literally crawling with the other spider-based enemies, the Trites, there is a popular theory among the fandom that the Trites have established an insect-like colony within the Alpha Labs with the Vagary as their queen.
- If you can spare the time to look at the Vargary's abdomen when fighting her, you'll see it's translucent, with a giant demonic fetus floating inside! It actually looks somewhat similar to the Mancubus.
Guardian of Hell
- A massive blind beast that chases the player through the bowels of Hell.
- Attack Its Weak Point: The Soul Cube even tells you to.
- Cores and Turrets Boss: Half of one; it uses orbiting "Seekers" to compensate for its blindness
Saboath & Sgt. Kelly
- The possessed form of Sgt. Kelly. Most of his body has been replaced with military hardware.
- The final boss of Doom 3. Even bigger than before.
- Contractual Boss Immunity: To everything but the Soul Cube.
- Flunky Boss: He's escorted by a lot of minor demons for you to recharge your Soul Cube with.
- Giant Foot of Stomping: His melee attack, which is a One-Hit Kill.
- Legacy Boss
- Attack Its Weak Point: The Berserk Hunter. Shoot its "heart".
- Burning with Anger: The Berserk Hunter.
- Flash Step: The Helltime Hunter.
- Shielded Core Boss: The Invulnerability Hunter uses four nearby power couplings to recharge his energy shield.
- Shockwave Stomp: One of the Invulnerability Hunter's attacks.
- Tennis Boss: The Helltime Hunter.
- Victor Gains Loser's Powers: After death, their powers are absorbed into the Artifact for the player to use against the next one.
- Warmup Boss: The Helltime Hunter exists mostly to teach the player how to use the Grabber.
Dr. Bertruger & Maledict
- The new leader of Hell, fought at the end of Doom 3: Resurrection of Evil. A giant pterodactyl-like or gargoyle-like demon that spews fire and summons meteor showers.
- Be Careful What You Wish For: In the final cutscene, he demands that the marine gives him the Artifact. The marine complies, alright... by shoving the Artifact down the Maledict's throat, killing him almost instantly.
- Big Bad: Of Doom 3 and Resurrection of Evil.
- Draco Lich: He looks quite a lot like an undead dragon.
- Contractual Boss Immunity: Inverted; his attacks cut through your invulnerability if you try to use the Artifact.
- Final Boss, New Dimension: Naturally, facing off against the Maledict is done in a particularly isolated part of Hell.
- Flunky Boss: He likes to summon a lot of Forgotten Ones.
- Heads I Win, Tails You Lose: After his health is depleted, the fight immediately switches to a cutscene where he knocks the player character on his ass.
Bosses (Doom 2016)
- A minor recurring boss enemy you face comparatively early in the game. They may possibly be Baalgar-class demons, making them the weaker kin of the Cyberdemon.
- Powered Armor: All they are is basically magical and meaty suits of armor with a Puppeteer Parasite inside both piloting it and acting as its battery.
- A Baalgar-class demon captured by the UAC and cybernetically modified to be even more lethal. The BFG-9000 was supposed to be attached to this monstrosity before the incident.
- Damage Sponge: Not so much as its classical incarnation, but trust us when we say it doesn't need to be.
- It Can Think: It has some very clever tactics in its arsenal. It even managed to play dumb with the UAC scientists in order to get them to let their guard down as well as give it enough energy to override their programming and break free of their control.
- It's Personal: Considering he was a shadowlord who was offed by the Doom Slayer and how he reacts when he sees him again, one could agree that his experience has left him with a massive chip in his shoulder.
- Kill It with Fire: Once it drags you into Hell, it will randomly throw walls of fire at you.
- Lightning Bruiser: This iteration of the Cyberdemon is VERY fast.
- Living MacGuffin: Doomguy needs the argent accumulator powering the Cyberdemon in order to send himself to Hell.
- Macross Missile Massacre: Aside from fighting with a rapid-fire rocket launcher weapon as its main weapon, it also has a back-mounted weapon system that will launch an aerial bombardment.
- Off with His Head!: In his second phase, if he kills the Doom Slayer with his crescent-shped energy blade projectile attack, you get to watch through the Doom Slayer's eyes as his head falls onto the ground behind his body and then watches his body collapse without it.
- Roaring Rampage of Revenge: This creature used to be an ancient shadowlord before the Doom Slayer fatally deposed him. After regaining sentience and finding the Doom Slayer again, he doesn't take it well.
- Wave Motion Gun: One of its attacks in this iteration is a huge energy blast. Also, as mentioned above, that BFG-9000 you're so proud of? Yeah, it was supposed to belong to this guy here.
- We Can Rebuild Him: When the UAC captured him, he was nothing but remains. Argent Energy revived him, and he was outfitted with cybernetic enhancements that made him incredibly hard to subdue or kill.
- A vaguely spider-like cybernetic demon monstrosity referred to in Hell as the Aranea Imperatix. Actually Olivia Pierce demonically transformed after she reaches the ruins of Argent D'nur.
- Badass Boast: Not on her part, but the Codex entry on her has quite an impressive one from the demons of Hell:
- When the gate is opened, in the fourth age, when we have risen and the masters have shown us the path, she will be come. A great blessing will be given to the key holder, for they will become one with the master, and in that holy union the power of the dark priest will be unleashed upon the heretics of the Penumbral Plain. The Aranea Imperatix. Carried in the mind of all who follow, fed from the blood of those who fell, made with bone of rock, iron, steel and sinew. A mighty god to rule over all other gods. One become two become legion.
- Beam Spam: She makes use of a plasma chaingun and multiple laser blasters to roast and toast anything in her way.
- Cephalothorax: Like the original incarnation, she's a big head with an even bigger brain, mounted on a spider-like chassis with little stubby hands.
- Damage Sponge: She will take a Hell of a beating before finally going down. While she does drop ammo after certain amounts of her health are shaved off, it's not uncommon to run out of ammo when fighting her.
- Giant Space Flea from Nowhere: Her inclusion in the game had not been so much as hinted at until you fight her. After dropping down into the boss arena, Olivia Pierce is shocked, and transforms into the Spider Mastermind. Then the battle starts.
- Psycho Electro: One of her attacks lets her create a burst of electricity in an aura around herself.
- Mythology Gag: In the original Doom's manual, it noted to be thankful for the small mercy that the Spider Mastermind didn't wield a plasma weapon like her Arachnotron underlings. Guess what? This one does.
- Shock and Awe: The second half of her boss battle has her electrifying the floor, requiring the Doomguy to jump on top of pillars to avoid damage. Her final phase has her manipulating electricity to throw the same pillars at the Doomguy.
- Shows Damage: She becomes increasingly bruised and has greater trouble moving as you damage her. By the end of the fight, she's just flailing lasers and limbs that can no longer support her weight at you in an attempt to get you to relent.
- Spider Tank: Her lower half is a cybernetic, four-legged chassis meant to support her quite large head.
- Turns Red: Halfway into the fight, she rips out a pair of cables that keep her psychokinetic powers properly restrained and begins electrifying the floor and tossing pillars at you like javelins.
- Villainous Breakdown: As the fight goes on and the damage she's taking starts catching up with her, she becomes much more desperate in her efforts to kill you. Her final phase is a pathetic blast of everything she's got left, most of which won't even hit you. By the time you've weakened her enough for a Glory Kill, she's pretty much given up and resigns herself to her imminent death.