History VideoGame / DoomII

** Mancubi are demons with guns for hands and robot legs.

* KingMook: Inverted with Arachnotrons, which are the minion version of the Spider Mastermind who first appeared in ''VideoGame/{{Doom}}'' Also inverted with Hell Knights, which are weaker versions of Barons of Hell.

* LastLousyPoint: "Industrial Zone" has a secret teleporter that is in itself not too hard to find - though the problem arises from that it's both a teleport pad and a secret-flagged zone. To register finding the secret, you have to touch the floor of the teleport pad; trying to do so will teleport you away right before you touch the floor. It took until 2018 before somebody managed to officially "find" it (by getting a Pain Elemental to spawn a Lost Soul directly on the marine's head at the right instant, shoving him into the pad's floor ''before'' the teleport took effect). John Romero [[https://twitter.com/romero/status/1035609232501030912 confirmed on Twitter]] that this obscure method which appears to be a bug was in fact the ''intended'' solution.

''VideoGame/Doom64'' is set after ''Doom II'''s events.

** As mentioned above, all blood effects in the GBA port were re-colored green, and almost all gore effects were excised. One notable exception is the chaingunner softly splitting in half upon death.

----

** The player is teleported to within eyesight of the exit portal... on a series of narrow beams suspended over inescapable toxic waste. And the player will be bombarded by flying Lost Souls, likely knocking them off for a slow death.

* BlackoutBasement: Maps 05, 10 and 25, which are respectively "The Waste Tunnels", "Refueling Base" and "Bloodfalls".

* DeadEndRoom: The exit chamber of [=MAP12=], though it doesn't prevent you going ''forward'', it only prevents you re-entering the rest of the map.

* HellOnEarth: True to form, ''Doom II: Hell on Earth'' is ExactlyWhatItSaysOnTheTin.

* IconicSequelCharacter:
** The skeletal rocket-launching Revenants make their debut here, and would go on to become one of the most famous enemies in the series, especially featuring heavily in the marketing for ''VideoGame/Doom2016'' and ''VideoGame/DoomEternal''.
** For a given value of "character", the Super Shotgun (or double-barreled shotgun). Making its first appearance here, the Super Shotgun has become a mainstay of the series, possibly eclipsing the BFG 9000 as the series' signature weapon and one of the most influential and widespread weapons in any shooter.
* IncreasinglyLethalEnemy: The Pain Elementals are {{Mook Maker}}s which spit out endless amounts of [[GoddamnBats Lost Souls]], potentially creating a swarm of them if left unchecked.

* KillEnemiesToOpen: "Dead Simple" ([=MAP07=]) starts the player inside a cloister with several mancubi. Once all the mancubi fall, the outer walls lower to reveal a fleet of arachnotrons in the outer perimeter. Killing ''them'' raises the central platform so that you can exit.

** This can even be seen under the hood. Patch [=v1.666=] for the original ''Doom'' removed Lost Souls from the end-of-level tallies. This was because the Pain Elemental, a monster introduced in ''Doom II'', spawns more Lost Souls to attack the player, so more Lost Souls can be in a level than were spawned when it loaded (which would mean monster counts at the end of a level could exceed 100% without this change). In fact, the console ports are one of the most literal examples imaginable, taking the same code compiled from ''Doom'' v1.2 for the earlier console ports of just the first game, then adding the new assets from ''Doom II''.
* MookMaker: The final boss spews out various enemies, which can telefrag you if you're not careful. And then there's the Pain Elementals, who chuck Lost Souls at you.

* PermanentlyMissableContent: Just like in the first Doom, some maps have areas and secrets that can only be accessed once, and should you fail to get into those areas before access to them is closed off or once you leave them, you'll be unable to access them again without restarting the entire level. The most infamous of these is a secret in the 27th map, "Monster Condo", where there's a secret area that's opened for 30 seconds upon starting the level, and should you fail to get into the area within the first 30 seconds, walls will come down and close it off permanently, with no way to open them back up from the outside, requiring you to restart the map if you want to tag all the secrets.
* PsychoStrings: Played in the intro.

** StationaryBoss: The final boss of the game, and by extension, most monster spawner based final bosses from the third-party map packs never move. Though it's kinda hard for them to move around when they're ''literally just a wall texture''.

* TeleFrag: The final boss can telefrag you if its monster-spawning projectile makes its impact right where you're standing.
* UnintentionallyUnwinnable: "Dead Simple": The central staircase raises once you kill all Arachnotrons to allow you to leave the map. If played on Nightmare, Arachnotrons can respawn and be killed off again, allowing you to raise the central stairs out of reach.

* JokeCharacter: The Spider Mastermind was considered to be a terrible final boss in the original game due to being a step down in every way from the Cyberdemon that capped off the second episode, and is in general considered to be a poorly-designed enemy that's ''very'' difficult to use effectively in a serious and fair manner, so the creators didn't hold back in using her in ''Doom II'' in ways that seem [[TakeThat intended to make fun of her]]. Her first appearance on Ultra-Violence and Nightmare difficulty is as the punchline to [=MAP06=]: The Crusher, where you flip a switch and the eponymous crusher slowly but effortlessly kills her for you. After then sitting out over half the game, [=MAP20=]: Gotcha!'s major setpiece is a duel between a Spider Mastermind and a Cyberdemon, setting them at a distance where the Cyberdemon wins almost every time (even if the Mastermind wins without interference, she'll be so near-death she's not a threat anymore). [=MAP23=]: Barrels o' Fun has one in a monster closet, who is flanked by several arachnotrons that she can easily be set to infight with, and which she can even die to given their higher numbers. [=MAP28=]: The Spirit World finally has two of them in one area, where their use of a hitscan weapon allows them to just as easily be set to fight one another instead of you, on top of more arachnotrons in a corner that can also be sicced on one or both of them.

* JokeCharacter: The Spider Mastermind was considered to be a terrible final boss in the original game due to being a step down in every way from the Cyberdemon that capped off the second episode, and is in general considered to be a poorly-designed enemy that's ''very'' difficult to use effectively in a serious and fair manner, so the creators didn't hold back in using her in ''Doom II'' in ways that seem [[TakeThat intended to make fun of her]]. Her first appearance on Ultra-Violence and Nightmare difficulty is as the punchline to [=MAP06=]: The Crusher, where you flip a switch and the eponymous crusher slowly but effortlessly kills her for you. [=MAP20=]: Gotcha!'s major setpiece is a duel between a Spider Mastermind and a Cyberdemon, setting them at a distance where the Cyberdemon wins almost every time (even if the Mastermind wins without interference, she'll be so near-death she's not a threat anymore). [=MAP23=]: Barrels o' Fun has one in a monster closet, who is flanked by several arachnotrons that she can easily be set to infight with, and which she can even die to given their higher numbers. [=MAP28=]: The Spirit World finally has two of them in one area, where their use of a hitscan weapon allows them to just as easily be set to fight one another instead of you, on top of more arachnotrons in a corner that can also be sicced on one or both of them.

* GlassCannon: The Chaingunners and Revenants are this; the former only having marginally more health than other former humans, but able to really put the hurt on you and even other monsters with a rapid hitscan attack that can't be dodged except by putting a solid object between you and them, while Revenants have relatively low health for a higher tier demon (they have 300 HP, while everything else above a Pinky has at least 400), but are one of the fastest monsters in the game and shoot homing rockets at you that deal up to 80 damage, and [[GoodOldFisticuffs pummel you quickly to pulp]] up close.

* KillEnemiesToOpen: "Dead Simple" ([=MAP07=]) starts the player inside a cloister with four mancubi, each one on a raised platform. Once all four mancubi fall, the outer walls lower to reveal a fleet of arachnotrons in the outer perimeter. Killing ''them'' raises the central platform so that you can exit.

* DownTheDrain: [=MAP02=], "Underhalls", is probably [[UrExample the first such case]] in a first-person shooter. It's not too noticeable for several reasons, chief among them the fact that the levels of classic ''Doom'', this one included, are abstract and difficult to discern as real-world locations even before [[EvilTaintedThePlace Hellish influence starts obviously taking hold]], as well as the fact that it's not a particularly annoying level compared to any others.
* DroughtLevelOfDoom: Level 9, "The Pit", is famous for not having quite enough ammo to destroy all the monsters, even on a full playthrough. Those wanting 100% completion usually had to resort to using the fists or chainsaw for good chunks of the level.

* GameMod: Even more popular for ''Doom II'' than for the original, since it runs on the same game engine as ''Doom'' but contains new content such as the Super Shotgun, several new enemies, and a couple other features; due to all the new content, the vast majority of Doom [=WAD=]s and mods use it, with probably over 95% of [=WAD=]s and mods being for ''Doom II'' rather than ''Ultimate Doom''.

* MissionPackSequel: Aside from a handful of new enemy types and one new weapon (the Super Shotgun, which is just an upgraded version of the existing shotgun), ''Doom II'' is graphically and mechanically identical to its predecessor. Many console ports, most distinctly the [=PlayStation=] version, actually combine levels from both ''Doom'' and ''Doom II'' into one massive 50+-level game, even placing some of the new ''II'' elements into levels from the original (e.g. adding in the Super Shotgun and replacing some enemies with Hell Knights and Mancubi), essentially treating the second game as a ''literal'' mission pack. The two games are so similar, and so immediately distinct from all future games in the series, that many fans often lump them together, referring to them (along with ''Master Levels for Doom II'' and ''VideoGame/FinalDoom'') as simply "Classic Doom".

* RealPlaceBackground: "Suburbs" is based on two real houses, one owned by Sandy Peterson and the other by his father, although due to the limitations of the engine he could only recreate the first floor of his own house. He gives a tour of his house on his Youtube channel.

* AscendedGlitch:
** If an Archvile [[AnimateDead resurrects a monster]] who was crushed by a DescendingCeiling, that monster will become a "ghost" that can pass through (or over) obstructions and is [[KungFuProofMook invulnerable to everything except splash damage and other monsters' melee attacks]]. Once this bug was discovered, several custom maps were ''designed'' to produce this effect, so much that when source ports fixed the bug they had to add an option to replicate the old behavior.
** Because the first two ''Doom'' games aren't true 3D, a rocket's splash damage isn't a sphere as might be expected; it's a cube (or square prism) of infinite height. Likewise, actors are considered to be infinitely-tall as far as collision is concerned, allowing you to hit enemies you can't even see over the edge of a pit (or for enemies at the top of a wall to scratch you if you're standing next to the wall). These bits of questionable behavior are what allows you to damage ''Doom II'''s final boss.

* BonusBoss: The secret level in the map pack ''Doom 2 the Way id Did'' mimics the ''VideoGame/CommanderKeen'' series instead of ''VideoGame/Wolfenstein3D''. If you can find the super-secret exit in it, however, you can actually fight [[spoiler:the ''Dopefish'' itself in the Well of Wishes]].

* BoringButPractical: "Shotgun" might not have the fancy ringing of "plasma gun", but the double-barreled version trounces demons just the same.

* BoringButPractical: "Shotgun" might not have the fancy ringing of "plasma gun", but the double-barreled version trounces demons just the same.

* DeadEndRoom: The exit chamber of [=MAP12=], though it doesn't prevent you going ''forward'', it only prevents you re-entering the rest of the map. See also AndIMustScream above.
* DeathByCameo:
** Creator/JohnRomero's head is the BigBad (more accurately, the Big Bad's hit-box, and it can only be found using the "idclip" cheat and walking into the boss' brain).
** The body of the designer of level 24 of the fan-made ''Doom II'' level pack ''Requiem'' can be seen upside down on a cross in that level.

* GameMod: Even more popular for ''Doom II'' than for the original, since it runs on the same game engine as ''Doom'' but contains new content such as the Super Shotgun, several new enemies, and a couple other features; due to all the new content, the vast majority of Doom wads and mods use it with probably over 95% of wads and mods being for ''Doom II'' rather than ''Ultimate Doom''.

* MissionPackSequel: Aside from a handful of new enemy types and one new weapon (the Super Shotgun, which is just an upgraded version of the existing shotgun), ''Doom II'' is graphically and mechanically identical to its predecessor. Many console ports, most distinctly the [=PlayStation=] version, actually combine levels from both ''Doom'' and ''Doom II'' into one massive 50+-level game, even placing some of the new ''II'' elements into levels from the original (e.g. adding in the Super Shotgun and replacing some enemies with Hell Knights and Mancubi), essentially treating the second game as a ''literal'' mission pack. The two games are so similar, and so immediately distinct from all future games in the series, that many fans often lump them together, referring to them (along with ''Master Levels for Doom II'' and ''VideoGame/FinalDoom'') as simply "Doom Classic".

* AsteroidsMonster:
** In the ''Doom II RPG'' for mobile devices, the Spider Mastermind will explode into three Arachnotrons.
** The Pain Elemental will spawn up to three Lost Souls when it's destroyed, in a triangular formation. However, if you let it live, it'll ''continually'' spawn them. Get a Pain Elemental into a fight with another monster, and it'll spit the things like missiles. The manual referenced this, saying that "killing him is almost as bad as letting him live".

** Alongside the Spider Mastermind are her children the Arachnotrons, which are basically smaller versions with plasma guns.

Relying on the same game engine as its predecessor, ''Doom II'' [[MissionPackSequel doesn't stray far from the original's gameplay]]. It was released at retail from the get-go and has levels which are played in sequence from beginning to end, unlike the shareware release of the first game and its distinct episodes. A new roster of enemies were added to increase the difficulty and force the player to come up with new strategies while traversing the game's levels. The game also features the addition of the Super Shotgun and the Megasphere, giving the player new ways to kill demons to their heart's content.

* AlwaysAccurateAttack: The arch-vile's attack will always hit the target unless it leaves the line of sight before it finishes. Partial invisibility won't cause it to miss, but does affect the knockback direction.

** Lost Souls do not count towards your kill percentage score at the end of a map, due to them being infinitely spawnable by Pain Elementals. So besides saving a player the hassle of having to hunt down every Lost Soul spat out by a Pain Elemental, it also safeguards against 100% kills becoming unachievable in instances where a common glitch occurs that leaves Lost Souls permanently stuck in walls after being expelled from a slain Pain Elemental. This behavior was also backported to the original game with v1.666, which was released concurrently with the launch of ''Doom II''. Console ports of the day are exempt from this, however, since they're built off of code compiled from v1.2 for the UsefulNotes/AtariJaguar port; ''Doom II'' ports simply added what new assets and maps their consoles could fit over the existing code rather than recompiling v1.666.

* LastLousyPoint: "Industrial Zone" has a not too hard to find secret teleporter - though the problem arises from that it's both a teleport pad and a secret-flagged zone. To register finding the secret, you have to touch the floor of the teleport pad; trying to do so will teleport you away right before you touch the floor. It took until 2018 before somebody managed to officially "find" it (by getting a Pain Elemental to spawn a Lost Soul directly on the marine's head at the right instant, shoving him into the pad's floor ''before'' the teleport took effect). John Romero [[https://twitter.com/romero/status/1035609232501030912 confirmed on Twitter]] that this obscure method which appears to be a bug was in fact the ''intended'' solution.

''Doom II: Hell on Earth'' is the 1994 sequel to [[Creator/IdSoftware id Software's]] hit FirstPersonShooter, ''VideoGame/{{Doom}}''.

Relying on the same game engine as its predecessor, ''Doom II'' [[MissionPackSequel doesn't stray far from the original's gameplay]]. It was released as a single installment, unlike the episodic releases of the first game. A new roster of enemies were added to increase the difficulty and force the player to come up with new strategies while traversing the game's levels. The game also features the addition of the Super Shotgun and the Megasphere, giving the player new ways to kill demons to their heart's content.

* GlassCannon: The Chaingunners and Revenants are this; the former only having marginally more health than other former humans, but able to really put the hurt on you and even other monsters with a rapid hitscan attack that can't be dodged, while Revenants have relatively low health for a higher tier demon (they have 300 HP, while everything else above a Pinky has at least 400), but are one of the fastest monsters in the game and shoot homing rockets at you that deal up to 80 damage, and [[GoodOldFisticuffs pummel you quickly to pulp]] up close.

** "Level 19: The Citadel" may be confusing to navigate as many of the paths are accessed by secret passages, including the way to the three keys for the exit (you only need 2/3 in the correct pairs to exit however).

** Finding the first secret level exit in "Level 15: Industrial Zone" can be counter-intuitive. You need to unlock a secret area inside the lavapit at the top region of the city, and enter this secret, then backtrack to an earlier area and find that a secret room has opened in a NonSequitur manner. Additionally, due to how one secret sector is possitioned, it is also normally impossible to trigger it for the purpose of HundredPercentCompletion due to a teleporter line toggling before you can touch the secret sector, unless you use an obscure bug where a Pain Elemental spawns a lost soul that pushes you onto the sector.

* SeriesContinuityError: The instruction manual's backstory refers to the protagonist as having stopped the invasion on "Mars base" and arriving home on Earth in a drop pod, even though the first ''Doom'' was set on the two moons of Mars, Phobos and Deimos, not the red planet itself, and the game concluded with Doomguy returning to earth from Hell via a portal. Some players have tried to resolve this error by suggesting that the player character of ''Doom II'' is actually a completely different person, [[HeroOfAnotherStory who defeated the demons on Mars while Doomguy was battling them on the moons]], and who also [[InexplicablyIdenticalIndividuals just happens to look exactly like him somehow]].