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* ActionBomb: Fly Bombs are literally just bombs with wings.
* WreathedInFlames: Willos are flies on fire.
* WreathedInFlames: Willos are flies on fire.
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* AttackReflector: They will spin and fire tears as they take damage.
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* AttackReflector: CounterAttack: They will spin and fire tears as they take damage.
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* {{Gasshole}}: They attack by farting, although the Dumpling's farts only inflict knockback and don't damage you. Skinlings and Scabs upgrade to {{Fartillery}} due to their fart attacks actually being dangerous on their own.
* ShoutOut: Taken from Creator/EdmundMcMillen's earlier games.
* ToiletHumor: They're basically ''floating butts'' that move around by farting.
* ShoutOut: Taken from Creator/EdmundMcMillen's earlier games.
* ToiletHumor: They're basically ''floating butts'' that move around by farting.
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* BreathWeapon: They attack by breathing a stream of purple fire toward Isaac.
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* ActionBomb: Bubbles bursts into a fountain of tears on death, but it's easy enough to avoid as long as you don't run directly into it.
* CounterAttack: Bubbles spits tears on taking damage, while Vessel spawns Small Maggots.
* DeadWeight: Barfy and Vessel, being zombie Fatties.
* DemBones: Big Bony is a skeletal Fatty. Turns out they're big-boned after all.
* CounterAttack: Bubbles spits tears on taking damage, while Vessel spawns Small Maggots.
* DeadWeight: Barfy and Vessel, being zombie Fatties.
* DemBones: Big Bony is a skeletal Fatty. Turns out they're big-boned after all.
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* ActionBomb: Bouncers explode into multiple bullets on death. The salvo is a lot smaller if you manage to kill them before they inflate.
* BodyHorror: As Mulligan varieties, this is a given for most of them. Of special note is the Bouncer, whose entire head is little more than a ''giant tumor'' that can '''inflate'''.
* MookMaker: Prey spawns Small Leechers, Mullighouls summon Willos, and Blasters lob Fly Bombs.
* BodyHorror: As Mulligan varieties, this is a given for most of them. Of special note is the Bouncer, whose entire head is little more than a ''giant tumor'' that can '''inflate'''.
* MookMaker: Prey spawns Small Leechers, Mullighouls summon Willos, and Blasters lob Fly Bombs.
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* AsteroidsMonster:
** Cursed Globins collapse into ''two'' piles of goo when killed, and each is capable of reforming into a new Cursed Globin. Thankfully, they can only duplicate a limited number of times.
** Cohorts split into several piles of Globin goo on death, which will naturally become Globins if not killed quickly enough.
* EnemySummoner: One of the Cohort's attacks summons a goo-form Globin.
** Cursed Globins collapse into ''two'' piles of goo when killed, and each is capable of reforming into a new Cursed Globin. Thankfully, they can only duplicate a limited number of times.
** Cohorts split into several piles of Globin goo on death, which will naturally become Globins if not killed quickly enough.
* EnemySummoner: One of the Cohort's attacks summons a goo-form Globin.
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* AsteroidMonster: Killing a Loose Knight causes it to split into an Empty Knight and a Pon.
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* AsteroidMonster: AsteroidsMonster: Killing a Loose Knight causes it to split into an Empty Knight and a Pon.
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* PinataEnemy: Like regular Tinted Rocks, Tinted Rock Spiders drop Soul Hearts on death. They tend to spawn when you bomb Tinted Rocks in the Mines.
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* MoreDakka: They fire a continuous stream of shots, similar to the effect of Soy Milk.
* WallCrawl: As a Wall Creep variant.
* WallCrawl: As a Wall Creep variant.
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* RuleOfThree: Hardies can only use their charge attack three times; after the third time, they automatically crumble.
* TalkingPoo: Well, it doesn't talk, but it's still a living coprolite.
* TalkingPoo: Well, it doesn't talk, but it's still a living coprolite.
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* BalanceBuff: They're one for the Clotty, giving them a powered-up fiery form and by extension making them immune to fire damage.
* InfernalRetaliation: They're formed when a Clotty catches fire, causing it to move and shoot much faster.
* InfernalRetaliation: They're formed when a Clotty catches fire, causing it to move and shoot much faster.
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* InvincibleMinorMinion: They're more of an obstacle than an enemy, as they can't be killed and don't become inactive when the room is cleared.
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* ArtificialBrilliance: Polties tend to make a beeline for any explosives in the room to try and get in as much damage on you as possible. And if you're expecting them to crack open a Tinted Rock for you, forget about it; the Polty will throw everything else in the room, then grab the Tinted Rock and run away with it.
* ImprovisedWeapon: Rocks, TNT, buckets, ''poop''... if it's an obstacle that can be picked up, they'll use it as a weapon.
* {{Poltergeist}}: If the name didn't make it obvious, they're ghosts that pick things up and throw them at you.
* ImprovisedWeapon: Rocks, TNT, buckets, ''poop''... if it's an obstacle that can be picked up, they'll use it as a weapon.
* {{Poltergeist}}: If the name didn't make it obvious, they're ghosts that pick things up and throw them at you.
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* ScrewThisImOuttaHere: Depleting his health causes his minecart to be destroyed, at which point Hornfel will run for the nearest door. This makes Hornfel the only boss that can be defeated non-lethally, but you do get a chance at a bomb-based item if you kill him before he escapes.
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* ScrewThisImOuttaHere: Depleting his Hornfel's health causes destroys his minecart to be destroyed, minecart, at which point Hornfel will run for the nearest door. This makes Hornfel the only boss that can be defeated non-lethally, but you do get a chance at a bomb-based item if you kill him before he escapes.
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* ThePawnsGoFirst: Just like the Haunt, the Heretic will send its minions after you first and only start fighting once they're all dead.
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* GrapplingHookPistol: The Visage's heart can use chains to pull itself to nearby surfaces. Note that this includes the mask and ''Isaac''.
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* EarthquakeMachine: The Quake Grimace releases rock waves in front of it.
* HelpfulMook: Bomb Grimaces don't really count as enemies at all, as their only function is to give you bombs that can be picked up and thrown.
* InvincibleMinorMinion: They can't be damaged, and don't deactivate under any conditions.
* HelpfulMook: Bomb Grimaces don't really count as enemies at all, as their only function is to give you bombs that can be picked up and thrown.
* InvincibleMinorMinion: They can't be damaged, and don't deactivate under any conditions.
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* InvincibleMinorMinion: Can't be damaged, but will die if all other enemies are killed.
* KaizoTrap: When they die after clearing the room, they also explode. Fortunately, there's a long enough delay before the explosion that you should be able to get away.
* TakenForGranite: Stillborns are composed largely of stone. They're inspired by the phenomenon ''lithopedion'', which is where [[BodyHorror a fetus dies in the womb and becomes calcified]].
* KaizoTrap: When they die after clearing the room, they also explode. Fortunately, there's a long enough delay before the explosion that you should be able to get away.
* TakenForGranite: Stillborns are composed largely of stone. They're inspired by the phenomenon ''lithopedion'', which is where [[BodyHorror a fetus dies in the womb and becomes calcified]].
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* InvincibleMinorMinion: Coils can't be killed normally, and will respawn if destroyed with a Chaos Card. Note that they will cause contact damage even if the room is cleared.
* ShockAndAwe: They radiate electric beams that attach to enemies in the room. A number of rooms have these in combination with Wall Huggers and Sliders, leading to a lot of dodging with not much else you can do about it.
* ShockAndAwe: They radiate electric beams that attach to enemies in the room. A number of rooms have these in combination with Wall Huggers and Sliders, leading to a lot of dodging with not much else you can do about it.
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* ActionBomb: Just like the other Boom Fly varieties.
* DeadlyGas: Sick Boom Flies release a cloud of poison gas on death.
* PlayingWithFire: On death, Dragonflies will release waves of fire in 4 directions. The directions they hit depends on the Dragonfly's appearance: if their eyes are normal, the fire goes in the cardinal directions, and if they have "x" eyes, the fire will be launched diagonally.
* DeadlyGas: Sick Boom Flies release a cloud of poison gas on death.
* PlayingWithFire: On death, Dragonflies will release waves of fire in 4 directions. The directions they hit depends on the Dragonfly's appearance: if their eyes are normal, the fire goes in the cardinal directions, and if they have "x" eyes, the fire will be launched diagonally.
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* InvisibleMonsters: Wraiths are permanently invisible, but (somehow) still leave reflections that can be used to track them. They're also revealed by the periodic flashes of lightning in the Downpour.
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* LosingYourHead: They look like human enough, except they're missing the upper half of their head.
* UniqueEnemy: Fanatics only appear in the Heretic's boss fight, and nowhere else.
* UniqueEnemy: Fanatics only appear in the Heretic's boss fight, and nowhere else.
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* AttackReflector: They will spin and fire tears as they take damage.
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* AsteroidMonster: Killing a Loose Knight causes it to split into an Empty Knight and a Pon.
* AttackItsWeakPoint: As with the other Knight variants, you damage these guys by attacking their exposed brains. The catch with the Empty Knight + Pon is that the brain is now hopping around ''outside'' the Knight.
* AttackReflector: In addition to being immune to damage, the Black Knight's front end deflects tears.
* AttackItsWeakPoint: As with the other Knight variants, you damage these guys by attacking their exposed brains. The catch with the Empty Knight + Pon is that the brain is now hopping around ''outside'' the Knight.
* AttackReflector: In addition to being immune to damage, the Black Knight's front end deflects tears.
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* ShootTheMedicFirst: Unless you focus down the Bishop first, you won't have much luck trying to damage enemies in the room.
* SupportPartyMember: They can only protect other enemies, and have no offensive abilities.
* SupportPartyMember: They can only protect other enemies, and have no offensive abilities.
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* EnemySummoner: Both of them attack by summoning other enemies until killed.
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* AttackReflector: The Whipper and Lunatic's attacks can deflect tears.
* TheBerserker: As its name suggests, the Lunatic attacks by charging at you while flailing wildly.
* WhipItGood: They attack by lashing out with fleshy whips.
* TheBerserker: As its name suggests, the Lunatic attacks by charging at you while flailing wildly.
* WhipItGood: They attack by lashing out with fleshy whips.
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* ActuallyFourMooks: Blind Bats are seen hanging from the roof by themselves, but once they're awakened, four of them drop down at once.
* InterfaceScrew: The Echo Bat can scramble your movement controls, which can be bad news when you're busy dodging three other enemies.
* InterfaceScrew: The Echo Bat can scramble your movement controls, which can be bad news when you're busy dodging three other enemies.
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* CantLiveWithoutYou: If one of the brothers dies, both die, so neglecting one of them to make the other stronger is out of the question.
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!!Fireworm/Mole
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!!Mole
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Added enemy folders and headings. ENEMY ENTRIES AND IMAGES NEEDED!
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!Bosses
[[folder:Normal Levels/Shared]]
!Baby Plum
[[quoteright:111:http://static.tvtropes.org/pmwiki/pub/images/little_jack_horner.png]]
* BulletHell: Very mild compared to most examples in the game, but it shoots a ''lot'' of projectiles for a boss you can fight on the first floor.
* KingMook: Of various flies, most notably the bloat flies.
* [[MascotMook Mascot Monster]]: Baby Plum is the mascot of the mod. Ironically, it is the only new boss that does not appear on any ''Antibirth'' floor[[note]]Reap Creep can show up in the Mines, and the Pile can show up in the Mausoleum[[/note]].
!The Pile
[[quoteright:192:http://static.tvtropes.org/pmwiki/pub/images/boss_the_pile.png]]
* BackFromTheDead: It's an undead version of Polycephalus and The Stain.
* BallisticBone: It can launch sprays of bone projectiles.
* DemBones: A fully skeletal version of Polycephalus.
* GetBackHereBoss: Like always, it pops up to attack and pulls away to hide.
!Reap Creep
[[quoteright:232:http://static.tvtropes.org/pmwiki/pub/images/thats_one_big_spider.png]]
* AllYourPowersCombined: Reap Creep combines the abilities of all three varieties of Wall Creep in the vanilla game and turns them UpToEleven.
* BeamSpam: Its third phase can fire a spray of four sweeping Brimstone beams.
* GiantSpider: It's a giant Wall Creep around the size of Widow.
* KingMook: Of the creeps.
* MookMaker: Spawns a lot of creeps to harass the player. It can also shake spiders loose from the ceiling.
* SequentialBoss: Has three phases, each imitating a different Wall Creep, all with different attacks. Its first phase primarily fires long chains of bullets aimed at the player, its second phase shoots wide spreads, and its third phase attacks with Brimstone lasers.
[[folder:Normal Levels/Shared]]
!Baby Plum
[[quoteright:111:http://static.tvtropes.org/pmwiki/pub/images/little_jack_horner.png]]
* BulletHell: Very mild compared to most examples in the game, but it shoots a ''lot'' of projectiles for a boss you can fight on the first floor.
* KingMook: Of various flies, most notably the bloat flies.
* [[MascotMook Mascot Monster]]: Baby Plum is the mascot of the mod. Ironically, it is the only new boss that does not appear on any ''Antibirth'' floor[[note]]Reap Creep can show up in the Mines, and the Pile can show up in the Mausoleum[[/note]].
!The Pile
[[quoteright:192:http://static.tvtropes.org/pmwiki/pub/images/boss_the_pile.png]]
* BackFromTheDead: It's an undead version of Polycephalus and The Stain.
* BallisticBone: It can launch sprays of bone projectiles.
* DemBones: A fully skeletal version of Polycephalus.
* GetBackHereBoss: Like always, it pops up to attack and pulls away to hide.
!Reap Creep
[[quoteright:232:http://static.tvtropes.org/pmwiki/pub/images/thats_one_big_spider.png]]
* AllYourPowersCombined: Reap Creep combines the abilities of all three varieties of Wall Creep in the vanilla game and turns them UpToEleven.
* BeamSpam: Its third phase can fire a spray of four sweeping Brimstone beams.
* GiantSpider: It's a giant Wall Creep around the size of Widow.
* KingMook: Of the creeps.
* MookMaker: Spawns a lot of creeps to harass the player. It can also shake spiders loose from the ceiling.
* SequentialBoss: Has three phases, each imitating a different Wall Creep, all with different attacks. Its first phase primarily fires long chains of bullets aimed at the player, its second phase shoots wide spreads, and its third phase attacks with Brimstone lasers.
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[[folder:Normal Levels/Shared]]
!Baby Plum
[[quoteright:111:http://static.tvtropes.org/pmwiki/pub/images/little_jack_horner.png]]
* BulletHell: Very mild compared to most examples in the game, but it shoots a ''lot'' of projectiles for a boss you can fight on the first floor.
* KingMook: Of various flies, most notably the bloat flies.
* [[MascotMook Mascot Monster]]: Baby Plum is the mascot of the mod. Ironically, it is the only new boss that does not appear on any ''Antibirth'' floor[[note]]Reap Creep can show up in the Mines, and the Pile can show up in the Mausoleum[[/note]].
!The Pile
[[quoteright:192:http://static.tvtropes.org/pmwiki/pub/images/boss_the_pile.png]]
* BackFromTheDead: It's an undead version of Polycephalus and The Stain.
* BallisticBone: It can launch sprays of bone projectiles.
* DemBones: A fully skeletal version of Polycephalus.
* GetBackHereBoss: Like always, it pops up to attack and pulls away to hide.
!Reap Creep
[[quoteright:232:http://static.tvtropes.org/pmwiki/pub/images/thats_one_big_spider.png]]
* AllYourPowersCombined: Reap Creep combines the abilities of all three varieties of Wall Creep in the vanilla game and turns them UpToEleven.
* BeamSpam: Its third phase can fire a spray of four sweeping Brimstone beams.
* GiantSpider: It's a giant Wall Creep around the size of Widow.
* KingMook: Of the creeps.
* MookMaker: Spawns a lot of creeps to harass the player. It can also shake spiders loose from the ceiling.
* SequentialBoss: Has three phases, each imitating a different Wall Creep, all with different attacks. Its first phase primarily fires long chains of bullets aimed at the player, its second phase shoots wide spreads, and its third phase attacks with Brimstone lasers.
!Flies
!!Fly Bomb/Willo
!!Ink/Mama Fly
!!Dragonfly/Sick Boom Fly
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[[folder:Downpour]]
!Wormwood
[[quoteright:133:http://static.tvtropes.org/pmwiki/pub/images/no_relation_to_the_teacher.png]]
* BossArenaUrgency: It can punch holes in the floor with its tail. Given the way pits work in this game, this won't kill you, but it does make it more difficult to dodge Wormwood's attacks and gives it more places to ambush you from.
* DeadlyLunge: Gains a ''very'' fast one when it's at low health.
* MakingASplash: Its projectiles appear to be water, as opposed to the standard blood projectiles.
* MeaningfulName: Named after the biblical [[https://en.wikipedia.org/wiki/Wormwood_(Bible) Wormwood]], a star which will fall and turn a third of Earth's waters bitter and deadly.
* TurnsRed: It becomes much more aggressive and will start making holes in the ground at low health.
* UndergroundMonkey: It's more or less an underwater Pin with [[TookALevelInBadass five additional levels in badass]].
!Beelzeblub
[[quoteright:192:http://static.tvtropes.org/pmwiki/pub/images/boss_beelzeblub.png]]
* FlunkyBoss: Just like the original Duke of Flies, but with small leeches instead of flies.
* PunnyName: "Beelzebub" + "blub", an onomatopoeia for bubbling water.
* UndergroundMonkey: A drowned, but still animate, version of the Duke of Flies.
!The Rainmaker
[[quoteright:89:http://static.tvtropes.org/pmwiki/pub/images/let_it_rain.png]]
* BattleInTheRain: The battle against him is accompanied by a constant downpour that stops when he's defeated.
* DanceBattler: His movements in battle borrow heavily from the flamenco.
* MakingASplash: Rainmaker's attacks all have him levitating balls of water to hurl at the player.
* SomethingAboutARose: He carries a rose in his mouth in the VersusCharacterSplash. In the fight itself, it's mostly absent except when he pulls it out after one of his attacks.
!!The Haunt
[[quoteright:150:http://static.tvtropes.org/pmwiki/pub/images/spooky_scary_son_of_a.png]]
-> Debut: ''Rebirth''
* BedsheetGhost: What's underneath its sheet is quite a bit scarier, however.
* FlyingFace: That rips itself open to reveal a [[SkullForAHead skull]] when its minions are dealt with.
* FlunkyBoss: He is surrounded by three Lil Haunts which attack before he does. First one attacks, then the other two do. He's invulnerable until they're dead and he moves to the top of the room. His black Champion version spawns spiders instead of shooting Brimstone.
* FrickinLaserBeams: In his second phase, he'll fire Brimstone downwards as he strafes along the top of the screen.
* HeelFaceTurn: The Lil' Haunt item gives you a friendly Lil' Haunt who chases your enemies.
* {{Intangibility}}: Until his minions are dead.
* KingMook: To the Lil' Haunts.
* TheLastOfTheseIsNotLikeTheOthers: All of the other bosses in the alternate route are either original to the mod or rehashed for it. The Haunt, on the other hand, is taken directly from the base game with no modifications. This is likely so that Downpour can have at least four bosses along with the other three new floors, as the new Basement/Cellar boss Baby Plum does not appear in the floor's alternate counterpart for whatever reason.
* NoFairCheating: He normally paces from side to side along the top edge of the screen, shooting downwards. If you try to move to the top where he can't shoot you, he'll immediately charge at you to cause damage. Which ''hurts like '''crazy.''''' Of course, if you're fast enough you can dodge it and still hurt the boss before it loops back.
* OurGhostsAreDifferent: This one has a skeleton. Which he'll gladly show to you.
* ThePawnsGoFirst: Sends his Lil' Haunt minions to attack you while he himself remains intangible. When they go down, then he fights you.
!Wormwood
[[quoteright:133:http://static.tvtropes.org/pmwiki/pub/images/no_relation_to_the_teacher.png]]
* BossArenaUrgency: It can punch holes in the floor with its tail. Given the way pits work in this game, this won't kill you, but it does make it more difficult to dodge Wormwood's attacks and gives it more places to ambush you from.
* DeadlyLunge: Gains a ''very'' fast one when it's at low health.
* MakingASplash: Its projectiles appear to be water, as opposed to the standard blood projectiles.
* MeaningfulName: Named after the biblical [[https://en.wikipedia.org/wiki/Wormwood_(Bible) Wormwood]], a star which will fall and turn a third of Earth's waters bitter and deadly.
* TurnsRed: It becomes much more aggressive and will start making holes in the ground at low health.
* UndergroundMonkey: It's more or less an underwater Pin with [[TookALevelInBadass five additional levels in badass]].
!Beelzeblub
[[quoteright:192:http://static.tvtropes.org/pmwiki/pub/images/boss_beelzeblub.png]]
* FlunkyBoss: Just like the original Duke of Flies, but with small leeches instead of flies.
* PunnyName: "Beelzebub" + "blub", an onomatopoeia for bubbling water.
* UndergroundMonkey: A drowned, but still animate, version of the Duke of Flies.
!The Rainmaker
[[quoteright:89:http://static.tvtropes.org/pmwiki/pub/images/let_it_rain.png]]
* BattleInTheRain: The battle against him is accompanied by a constant downpour that stops when he's defeated.
* DanceBattler: His movements in battle borrow heavily from the flamenco.
* MakingASplash: Rainmaker's attacks all have him levitating balls of water to hurl at the player.
* SomethingAboutARose: He carries a rose in his mouth in the VersusCharacterSplash. In the fight itself, it's mostly absent except when he pulls it out after one of his attacks.
!!The Haunt
[[quoteright:150:http://static.tvtropes.org/pmwiki/pub/images/spooky_scary_son_of_a.png]]
-> Debut: ''Rebirth''
* BedsheetGhost: What's underneath its sheet is quite a bit scarier, however.
* FlyingFace: That rips itself open to reveal a [[SkullForAHead skull]] when its minions are dealt with.
* FlunkyBoss: He is surrounded by three Lil Haunts which attack before he does. First one attacks, then the other two do. He's invulnerable until they're dead and he moves to the top of the room. His black Champion version spawns spiders instead of shooting Brimstone.
* FrickinLaserBeams: In his second phase, he'll fire Brimstone downwards as he strafes along the top of the screen.
* HeelFaceTurn: The Lil' Haunt item gives you a friendly Lil' Haunt who chases your enemies.
* {{Intangibility}}: Until his minions are dead.
* KingMook: To the Lil' Haunts.
* TheLastOfTheseIsNotLikeTheOthers: All of the other bosses in the alternate route are either original to the mod or rehashed for it. The Haunt, on the other hand, is taken directly from the base game with no modifications. This is likely so that Downpour can have at least four bosses along with the other three new floors, as the new Basement/Cellar boss Baby Plum does not appear in the floor's alternate counterpart for whatever reason.
* NoFairCheating: He normally paces from side to side along the top edge of the screen, shooting downwards. If you try to move to the top where he can't shoot you, he'll immediately charge at you to cause damage. Which ''hurts like '''crazy.''''' Of course, if you're fast enough you can dodge it and still hurt the boss before it loops back.
* OurGhostsAreDifferent: This one has a skeleton. Which he'll gladly show to you.
* ThePawnsGoFirst: Sends his Lil' Haunt minions to attack you while he himself remains intangible. When they go down, then he fights you.
to:
!Wormwood
[[quoteright:133:http://static.tvtropes.org/pmwiki/pub/images/no_relation_to_the_teacher.png]]
* BossArenaUrgency: It can punch holes in the floor with its tail. Given the way pits work in this game, this won't kill you, but it does make it more difficult to dodge Wormwood's attacks and gives it more places to ambush you from.
* DeadlyLunge: Gains a ''very'' fast one when it's at low health.
* MakingASplash: Its projectiles appear to be water, as opposed to the standard blood projectiles.
* MeaningfulName: Named after the biblical [[https://en.wikipedia.org/wiki/Wormwood_(Bible) Wormwood]], a star which will fall and turn a third of Earth's waters bitter and deadly.
* TurnsRed: It becomes much more aggressive and will start making holes in the ground at low health.
* UndergroundMonkey: It's more or less an underwater Pin with [[TookALevelInBadass five additional levels in badass]].
!Beelzeblub
[[quoteright:192:http://static.tvtropes.org/pmwiki/pub/images/boss_beelzeblub.png]]
* FlunkyBoss: Just like the original Duke of Flies, but with small leeches instead of flies.
* PunnyName: "Beelzebub" + "blub", an onomatopoeia for bubbling water.
* UndergroundMonkey: A drowned, but still animate, version of the Duke of Flies.
!The Rainmaker
[[quoteright:89:http://static.tvtropes.org/pmwiki/pub/images/let_it_rain.png]]
* BattleInTheRain: The battle against him is accompanied by a constant downpour that stops when he's defeated.
* DanceBattler: His movements in battle borrow heavily from the flamenco.
* MakingASplash: Rainmaker's attacks all have him levitating balls of water to hurl at the player.
* SomethingAboutARose: He carries a rose in his mouth in the VersusCharacterSplash. In the fight itself, it's mostly absent except when he pulls it out after one of his attacks.
!!The Haunt
[[quoteright:150:http://static.tvtropes.org/pmwiki/pub/images/spooky_scary_son_of_a.png]]
-> Debut: ''Rebirth''
* BedsheetGhost: What's underneath its sheet is quite a bit scarier, however.
* FlyingFace: That rips itself open to reveal a [[SkullForAHead skull]] when its minions are dealt with.
* FlunkyBoss: He is surrounded by three Lil Haunts which attack before he does. First one attacks, then the other two do. He's invulnerable until they're dead and he moves to the top of the room. His black Champion version spawns spiders instead of shooting Brimstone.
* FrickinLaserBeams: In his second phase, he'll fire Brimstone downwards as he strafes along the top of the screen.
* HeelFaceTurn: The Lil' Haunt item gives you a friendly Lil' Haunt who chases your enemies.
* {{Intangibility}}: Until his minions are dead.
* KingMook: To the Lil' Haunts.
* TheLastOfTheseIsNotLikeTheOthers: All of the other bosses in the alternate route are either original to the mod or rehashed for it. The Haunt, on the other hand, is taken directly from the base game with no modifications. This is likely so that Downpour can have at least four bosses along with the other three new floors, as the new Basement/Cellar boss Baby Plum does not appear in the floor's alternate counterpart for whatever reason.
* NoFairCheating: He normally paces from side to side along the top edge of the screen, shooting downwards. If you try to move to the top where he can't shoot you, he'll immediately charge at you to cause damage. Which ''hurts like '''crazy.''''' Of course, if you're fast enough you can dodge it and still hurt the boss before it loops back.
* OurGhostsAreDifferent: This one has a skeleton. Which he'll gladly show to you.
* ThePawnsGoFirst: Sends his Lil' Haunt minions to attack you while he himself remains intangible. When they go down, then he fights you.
!Humanoid
!!Blurb/Tidal Gaper/Wraith
!!Danny/Coal Boy
!!Faceless/Fanatic
!!Strifer/Rotten Gaper/Twitchy
!!Sub Horf
!!Dumpling/Skinling/Scab
!!Revenant
!!Bubbles/Quakey/Big Bony/Barfy/Vessel
!!Prey/Mullighoul/Bouncer/Blaster
!!Cursed Globin/Cohort
!!Black Knight/Loose Knight/Empty Knight/Pon
!!Vis Versa/Evis
!!Swapper/Unborn
!!Bishop
!!Necromancer/Exorcist
!!Screamer
!!Whipper/Snapper/Lunatic
Changed line(s) 167,194 (click to see context) from:
[[folder:Mines]]
!Tuff Twins
[[quoteright:203:http://static.tvtropes.org/pmwiki/pub/images/boss_tuff_twins.png]]
* BossArenaIdiocy: The Tuff Twins start out covered in a rock shell that makes them impervious to attack and must be broken with explosions. Their boss room always happens to contain a number of Bomb Grimaces that provide free bombs to chuck at them, and occasionally a couple of TNT barrels as well.
* FlunkyBoss: They spawn Inks (which release four bullets in the diagonal directions on death along with a puddle of slowing creep) to harass the player throughout the fight. If their head is exposed, they switch to Suckers instead.
* ShedArmorGainSpeed: They become faster as you blow up their stone armor.
* UndergroundMonkey: Stone-encrusted versions of Larry Jr.
!Great Gideon
[[quoteright:126:http://static.tvtropes.org/pmwiki/pub/images/a_scott_pilgrim_reference.png]]
* AllYourPowersCombined: Combines the abilities of all Grimace varieties in ''Rebirth'' and the new Quake Grimace in ''Antibirth''.
* EasterEgg: Throwing a Chaos Card at him will instantly kill him,as well as [[spoiler:open a hidden crawl space that holds several items and chests]].
* FireBreathingWeapon: One of Gideon's attacks has it spewing fiery bullets down the middle of the room, which will leave lingering fires on the ground. It also exploits this by summoning a number of enemies that [[InfernalRetaliation become more powerful when lit on fire]].
* FlunkyBoss: Summons six waves of enemies to attack you in addition to shooting at you himself. Defeating all of the minions ends the fight.
* KingMook: To the Grimaces.
* NighInvulnerable: Like the [[InvincibleMinorMinion enemies]] he's based on, Great Gideon is immune to everything that's not a Chaos Card, and defeating the other enemies in the room causes him to shut down.
!Hornfel
[[quoteright:74:http://static.tvtropes.org/pmwiki/pub/images/i_wanna_take_you_for_a_minecart_ride.png]]
* MadBomber: His main modus operandi is to ride around on his minecart, chucking various bombs at you.
* MinecartMadness: Inverted. He's the one on the minecart, but you're still the one doing the dodging.
* ScoobyDoobyDoors: His boss room is lined with them, and Hornfel can emerge from any one at any time. Of course, the player can't use them.
* ScrewThisImOuttaHere: Depleting his health causes his minecart to be destroyed, at which point Hornfel will run for the nearest door. This makes Hornfel the only boss that can be defeated non-lethally, but you do get a chance at a bomb-based item if you kill him before he escapes.
* ShoutOut: The Brimstone bombs he uses are visually based on the grenades launched by the Iron Bomber, an unlockable weapon in VideoGame/TeamFortress2 which was originally designed and submitted to the Steam Workshop by Kilburn (one of the mod's creators).
* SuperSpit: His main non-bomb attack has him continually speeding up on his minecart, only to end up going so fast that he gets sick and [[VomitIndiscretionShot projectile vomits in your general direction]]. The puke, of course, explodes.
* TrickBomb: Hornfel's bombs use several different modifiers: he can throw Hot Bombs which leave damaging fire behind, Rock Bombs which send rock waves in the cardinal directions, and a unique Brimstone bomb that explodes into a four-way Brimstone laser.
!Tuff Twins
[[quoteright:203:http://static.tvtropes.org/pmwiki/pub/images/boss_tuff_twins.png]]
* BossArenaIdiocy: The Tuff Twins start out covered in a rock shell that makes them impervious to attack and must be broken with explosions. Their boss room always happens to contain a number of Bomb Grimaces that provide free bombs to chuck at them, and occasionally a couple of TNT barrels as well.
* FlunkyBoss: They spawn Inks (which release four bullets in the diagonal directions on death along with a puddle of slowing creep) to harass the player throughout the fight. If their head is exposed, they switch to Suckers instead.
* ShedArmorGainSpeed: They become faster as you blow up their stone armor.
* UndergroundMonkey: Stone-encrusted versions of Larry Jr.
!Great Gideon
[[quoteright:126:http://static.tvtropes.org/pmwiki/pub/images/a_scott_pilgrim_reference.png]]
* AllYourPowersCombined: Combines the abilities of all Grimace varieties in ''Rebirth'' and the new Quake Grimace in ''Antibirth''.
* EasterEgg: Throwing a Chaos Card at him will instantly kill him,as well as [[spoiler:open a hidden crawl space that holds several items and chests]].
* FireBreathingWeapon: One of Gideon's attacks has it spewing fiery bullets down the middle of the room, which will leave lingering fires on the ground. It also exploits this by summoning a number of enemies that [[InfernalRetaliation become more powerful when lit on fire]].
* FlunkyBoss: Summons six waves of enemies to attack you in addition to shooting at you himself. Defeating all of the minions ends the fight.
* KingMook: To the Grimaces.
* NighInvulnerable: Like the [[InvincibleMinorMinion enemies]] he's based on, Great Gideon is immune to everything that's not a Chaos Card, and defeating the other enemies in the room causes him to shut down.
!Hornfel
[[quoteright:74:http://static.tvtropes.org/pmwiki/pub/images/i_wanna_take_you_for_a_minecart_ride.png]]
* MadBomber: His main modus operandi is to ride around on his minecart, chucking various bombs at you.
* MinecartMadness: Inverted. He's the one on the minecart, but you're still the one doing the dodging.
* ScoobyDoobyDoors: His boss room is lined with them, and Hornfel can emerge from any one at any time. Of course, the player can't use them.
* ScrewThisImOuttaHere: Depleting his health causes his minecart to be destroyed, at which point Hornfel will run for the nearest door. This makes Hornfel the only boss that can be defeated non-lethally, but you do get a chance at a bomb-based item if you kill him before he escapes.
* ShoutOut: The Brimstone bombs he uses are visually based on the grenades launched by the Iron Bomber, an unlockable weapon in VideoGame/TeamFortress2 which was originally designed and submitted to the Steam Workshop by Kilburn (one of the mod's creators).
* SuperSpit: His main non-bomb attack has him continually speeding up on his minecart, only to end up going so fast that he gets sick and [[VomitIndiscretionShot projectile vomits in your general direction]]. The puke, of course, explodes.
* TrickBomb: Hornfel's bombs use several different modifiers: he can throw Hot Bombs which leave damaging fire behind, Rock Bombs which send rock waves in the cardinal directions, and a unique Brimstone bomb that explodes into a four-way Brimstone laser.
to:
!Tuff Twins
[[quoteright:203:http://static.tvtropes.org/pmwiki/pub/images/boss_tuff_twins.png]]
* BossArenaIdiocy: The Tuff Twins start out covered in a rock shell that makes them impervious to attack
!Worms and
* FlunkyBoss: They spawn Inks (which release four bullets in the diagonal directions on death along with a puddle of slowing creep) to harass the player throughout the fight. If their head is exposed, they switch to Suckers instead.
* ShedArmorGainSpeed: They become faster as you blow up their stone armor.
* UndergroundMonkey: Stone-encrusted versions of Larry Jr.
!Great Gideon
[[quoteright:126:http://static.tvtropes.org/pmwiki/pub/images/a_scott_pilgrim_reference.png]]
* AllYourPowersCombined: Combines the abilities of all Grimace varieties in ''Rebirth'' and the new Quake Grimace in ''Antibirth''.
* EasterEgg: Throwing a Chaos Card at him will instantly kill him,as well as [[spoiler:open a hidden crawl space that holds several items and chests]].
* FireBreathingWeapon: One of Gideon's attacks has it spewing fiery bullets down the middle of the room, which will leave lingering fires on the ground. It also exploits this by summoning a number of enemies that [[InfernalRetaliation become more powerful when lit on fire]].
* FlunkyBoss: Summons six waves of enemies to attack you in addition to shooting at you himself. Defeating all of the minions ends the fight.
* KingMook: To the Grimaces.
* NighInvulnerable: Like the [[InvincibleMinorMinion enemies]] he's based on, Great Gideon is immune to everything that's not a Chaos Card, and defeating the other enemies in the room causes him to shut down.
!Hornfel
[[quoteright:74:http://static.tvtropes.org/pmwiki/pub/images/i_wanna_take_you_for_a_minecart_ride.png]]
* MadBomber: His main modus operandi is to ride around on his minecart, chucking various bombs at you.
* MinecartMadness: Inverted. He's the one on the minecart, but you're still the one doing the dodging.
* ScoobyDoobyDoors: His boss room is lined with them, and Hornfel can emerge from any one at any time. Of course, the player can't use them.
* ScrewThisImOuttaHere: Depleting his health causes his minecart to be destroyed, at which point Hornfel will run for the nearest door. This makes Hornfel the only boss that can be defeated non-lethally, but you do get a chance at a bomb-based item if you kill him before he escapes.
* ShoutOut: The Brimstone bombs he uses are visually based on the grenades launched by the Iron Bomber, an unlockable weapon in VideoGame/TeamFortress2 which was originally designed and submitted to the Steam Workshop by Kilburn (one of the mod's creators).
* SuperSpit: His main non-bomb attack has him continually speeding up on his minecart, only to end up going so fast that he gets sick and [[VomitIndiscretionShot projectile vomits in your general direction]]. The puke, of course, explodes.
* TrickBomb: Hornfel's bombs use several different modifiers: he can throw Hot Bombs which leave damaging fire behind, Rock Bombs which send rock waves in the cardinal directions, and a unique Brimstone bomb that explodes into a four-way Brimstone laser.
!!Small Leech/Small Maggot
!!Adult Leech
!!Fireworm/Mole
!!Corpse Eater/Carrion Rider
Changed line(s) 197,257 (click to see context) from:
[[folder:Mausoleum]]
!The Heretic
[[quoteright:192:http://static.tvtropes.org/pmwiki/pub/images/boss_the_heretic.png]]
----
* KaizoTrap: After it dies, the fire in its eye falls to the ground and erupts into a four-way burst, possibly damaging you if you're not paying attention.
* NonHumanUndead: It's an undead ghost. Try to wrap your head around that.
* OurGhostsAreDifferent: And apparently more undead.
* ReflectingLaser: His boss room always comes with a number of extinguished fireplaces. One of his attacks lights them up, then fires a Brimstone beam that chains between them.
* UngratefulBastard: It gets revived by cultists, and it thanks them by turning them into {{Mooks}} to send after you.
!The Visage
[[quoteright:181:http://static.tvtropes.org/pmwiki/pub/images/how_does_a_mask_die_anyway.png]]
* AttackItsWeakPoint: Initially, it's the chain holding the two together; afterwards, the heart itself becomes the weak point, and the mask can be incapacitated by attacking it from behind.
* CatAndMouseBoss: As with Mask of Infamy, the heart flees while the mask tries to run you down. The difference is that the heart is fully capable of fighting back, and the mask doesn't like to stay dead.
* DualBoss: As opposed to the original Mask of Infamy which is taken down one part at a time, both parts of The Visage attack simultaneously, and even come with a number of {{Combination Attack}}s.
* TurnsRed: Twice. Once when the chain is destroyed and gives the two parts of the Visage free movement, and a second time when the heart's health drops low and it changes its attack patterns.
* VariableLengthChain: The chain binding the heart and mask together in the initial phase, particularly noticeable when the mask charges and stretches the chain to around twice its usual length. During the second phase, the heart uses one in a number of its attacks.
!The Siren
[[quoteright:192:http://static.tvtropes.org/pmwiki/pub/images/boss_the_siren.png]]
----
* BulletHell: Like a number of other bosses, The Siren can unleash a dense array of bullets in all directions. Her shots actually curve in the air, making them harder to dodge.
* CharmPerson: Can steal your familiars with her voice and turn them against you.
* EnthrallingSiren: Her singing can lure your familiars over to her side.
* {{Expy}}: Of, oddly enough, the Gorgun from VideoGame/EnterTheGungeon, having several similar attacks and a similar appearance.
* PowerParasite: Effectively copies the abilities of your familiars by charming them. Things can get very messy if she steals something like Dry Baby or Dead Cat.
* StrippedToTheBone: The Siren is rapidly reduced to an inert skeleton upon death. [[spoiler:Destroying her skull unlocks a trinket.]]
!Mausoleum Mom
[[quoteright:141:http://static.tvtropes.org/pmwiki/pub/images/boss_mom.png]]
----
* AttackOfTheFiftyFootWhatever: Her boss fight.
* AxCrazy: Her goal is to kill her own son, and she doesn't sound too upset about it during the fight, what with the laughing and all.
* BodyHorror: The way Mom's body parts move throughout the fight (such as both eyes appearing on opposite sides of the room while she tries to stomp on you) suggest an ability to contort herself in rather...impossible ways.
* BossBanter: ''ISAAAAAC!''
* DeathByIrony: [[spoiler:Crushed by her own bible!]]
* DiscOneFinalBoss: Demoted to this on your second playthrough and beyond. She's still a Disc One boss in the alternate path, but in terms of floor number, she's faced much closer to the path's final boss than the main path's end.
* EvilIsVisceral: Likely the reason her body parts are detailed and somewhat deformed.
* EvilLaugh: She lets out one every time she successfully damages Isaac.
* EyeBeams: Mausoleum Mom gains the ability to fire Brimstone beams from her eye.
* TheFaceless: Her entire face is never shown at any point in the main game (the intro and epilogue don't count, as they're Isaac's cartoon drawings). This is [[SubvertedTrope subverted]] after you beat the Chest in ''WOTL'' or ''Rebirth'', but only briefly. In photographs, to be precise.
* FanDisservice: When Isaac uses the Mom's Bra item, a picture of his mother's shirtless torso flashes on the screen. A ''very'' unflattering picture of his mother's less-than-fit shirtless torso.
* FatBastard: As shown by her giant leg and the picture that shows up when using Mom's Bra.
* FinalBoss: In your first playthrough. She's nowhere near the TrueFinalBoss, though.
* FlunkyBoss: She'll summon groups of random enemies to battle Isaac.
* GameplayAndStoryIntegration: Using [[spoiler:the Bible]] instantly defeats her in her boss fight.
* GiantFootOfStomping: Her main method of direct attack.
* {{Gonk}}: Same deal as normal Mom.
* GrossUpCloseUp: One of her leg in the boss portrait, and one of her body in the picture that appears when using Mom's Bra.
* HumanoidAbomination: Most of what she does in-game and in a few cutscenes blatantly disregards normal body movements if not physics. She can step on her own eye, generally alter size, and [[spoiler:her arm can fit in a chest inside her heart inside her womb]].
* {{Leitmotif}}: ''Matricide'', as with normal Mom. [[spoiler:Mom's Heart, on the other hand, gets a new one in ''Gloria Filio''.]]
* MookMaker: And these mooks are a lot harder than last time!
* MotherOfAThousandYoung: If you go by the theory that the majority of the enemies are her former children.
* SayMyName: ISAAC!
* SkippableBoss: Provided you have [[spoiler:the Bible]] on you by the time you reach her, and it's fully charged.
* TacticalSuicideBoss: It's not actually mandatory, but making her stomp herself is possible, and deals lots of damage.
* TrickBoss: [[spoiler:Defeating her while holding the Knife Pieces throws you into a fight against Mom's Heart immediately afterwards.]]
* UndergroundMonkey: The version of Mom you encounter in the Mausoleum.
* YourSizeMayVary: Just how big is she? In the cutscenes, she's a normal-sized human being, but her underwear is the right size to be worn by a child visibly smaller than her, in the boss fight her leg is the length of the screen, and then [[spoiler:her womb is big enough to have two entire levels in it, with her heart being larger than Isaac]].
!The Heretic
[[quoteright:192:http://static.tvtropes.org/pmwiki/pub/images/boss_the_heretic.png]]
----
* KaizoTrap: After it dies, the fire in its eye falls to the ground and erupts into a four-way burst, possibly damaging you if you're not paying attention.
* NonHumanUndead: It's an undead ghost. Try to wrap your head around that.
* OurGhostsAreDifferent: And apparently more undead.
* ReflectingLaser: His boss room always comes with a number of extinguished fireplaces. One of his attacks lights them up, then fires a Brimstone beam that chains between them.
* UngratefulBastard: It gets revived by cultists, and it thanks them by turning them into {{Mooks}} to send after you.
!The Visage
[[quoteright:181:http://static.tvtropes.org/pmwiki/pub/images/how_does_a_mask_die_anyway.png]]
* AttackItsWeakPoint: Initially, it's the chain holding the two together; afterwards, the heart itself becomes the weak point, and the mask can be incapacitated by attacking it from behind.
* CatAndMouseBoss: As with Mask of Infamy, the heart flees while the mask tries to run you down. The difference is that the heart is fully capable of fighting back, and the mask doesn't like to stay dead.
* DualBoss: As opposed to the original Mask of Infamy which is taken down one part at a time, both parts of The Visage attack simultaneously, and even come with a number of {{Combination Attack}}s.
* TurnsRed: Twice. Once when the chain is destroyed and gives the two parts of the Visage free movement, and a second time when the heart's health drops low and it changes its attack patterns.
* VariableLengthChain: The chain binding the heart and mask together in the initial phase, particularly noticeable when the mask charges and stretches the chain to around twice its usual length. During the second phase, the heart uses one in a number of its attacks.
!The Siren
[[quoteright:192:http://static.tvtropes.org/pmwiki/pub/images/boss_the_siren.png]]
----
* BulletHell: Like a number of other bosses, The Siren can unleash a dense array of bullets in all directions. Her shots actually curve in the air, making them harder to dodge.
* CharmPerson: Can steal your familiars with her voice and turn them against you.
* EnthrallingSiren: Her singing can lure your familiars over to her side.
* {{Expy}}: Of, oddly enough, the Gorgun from VideoGame/EnterTheGungeon, having several similar attacks and a similar appearance.
* PowerParasite: Effectively copies the abilities of your familiars by charming them. Things can get very messy if she steals something like Dry Baby or Dead Cat.
* StrippedToTheBone: The Siren is rapidly reduced to an inert skeleton upon death. [[spoiler:Destroying her skull unlocks a trinket.]]
!Mausoleum Mom
[[quoteright:141:http://static.tvtropes.org/pmwiki/pub/images/boss_mom.png]]
----
* AttackOfTheFiftyFootWhatever: Her boss fight.
* AxCrazy: Her goal is to kill her own son, and she doesn't sound too upset about it during the fight, what with the laughing and all.
* BodyHorror: The way Mom's body parts move throughout the fight (such as both eyes appearing on opposite sides of the room while she tries to stomp on you) suggest an ability to contort herself in rather...impossible ways.
* BossBanter: ''ISAAAAAC!''
* DeathByIrony: [[spoiler:Crushed by her own bible!]]
* DiscOneFinalBoss: Demoted to this on your second playthrough and beyond. She's still a Disc One boss in the alternate path, but in terms of floor number, she's faced much closer to the path's final boss than the main path's end.
* EvilIsVisceral: Likely the reason her body parts are detailed and somewhat deformed.
* EvilLaugh: She lets out one every time she successfully damages Isaac.
* EyeBeams: Mausoleum Mom gains the ability to fire Brimstone beams from her eye.
* TheFaceless: Her entire face is never shown at any point in the main game (the intro and epilogue don't count, as they're Isaac's cartoon drawings). This is [[SubvertedTrope subverted]] after you beat the Chest in ''WOTL'' or ''Rebirth'', but only briefly. In photographs, to be precise.
* FanDisservice: When Isaac uses the Mom's Bra item, a picture of his mother's shirtless torso flashes on the screen. A ''very'' unflattering picture of his mother's less-than-fit shirtless torso.
* FatBastard: As shown by her giant leg and the picture that shows up when using Mom's Bra.
* FinalBoss: In your first playthrough. She's nowhere near the TrueFinalBoss, though.
* FlunkyBoss: She'll summon groups of random enemies to battle Isaac.
* GameplayAndStoryIntegration: Using [[spoiler:the Bible]] instantly defeats her in her boss fight.
* GiantFootOfStomping: Her main method of direct attack.
* {{Gonk}}: Same deal as normal Mom.
* GrossUpCloseUp: One of her leg in the boss portrait, and one of her body in the picture that appears when using Mom's Bra.
* HumanoidAbomination: Most of what she does in-game and in a few cutscenes blatantly disregards normal body movements if not physics. She can step on her own eye, generally alter size, and [[spoiler:her arm can fit in a chest inside her heart inside her womb]].
* {{Leitmotif}}: ''Matricide'', as with normal Mom. [[spoiler:Mom's Heart, on the other hand, gets a new one in ''Gloria Filio''.]]
* MookMaker: And these mooks are a lot harder than last time!
* MotherOfAThousandYoung: If you go by the theory that the majority of the enemies are her former children.
* SayMyName: ISAAC!
* SkippableBoss: Provided you have [[spoiler:the Bible]] on you by the time you reach her, and it's fully charged.
* TacticalSuicideBoss: It's not actually mandatory, but making her stomp herself is possible, and deals lots of damage.
* TrickBoss: [[spoiler:Defeating her while holding the Knife Pieces throws you into a fight against Mom's Heart immediately afterwards.]]
* UndergroundMonkey: The version of Mom you encounter in the Mausoleum.
* YourSizeMayVary: Just how big is she? In the cutscenes, she's a normal-sized human being, but her underwear is the right size to be worn by a child visibly smaller than her, in the boss fight her leg is the length of the screen, and then [[spoiler:her womb is big enough to have two entire levels in it, with her heart being larger than Isaac]].
to:
!The Heretic
[[quoteright:192:http://static.tvtropes.org/pmwiki/pub/images/boss_the_heretic.png]]
----
* KaizoTrap: After it dies, the fire in its eye falls to the ground and erupts into a four-way burst, possibly damaging you if you're not paying attention.
* NonHumanUndead: It's an undead ghost. Try to wrap your head around that.
* OurGhostsAreDifferent: And apparently more undead.
* ReflectingLaser: His boss room always comes with a number of extinguished fireplaces. One of his attacks lights them up, then fires a Brimstone beam that chains between them.
* UngratefulBastard: It gets revived by cultists, and it thanks them by turning them into {{Mooks}} to send after you.
!The Visage
[[quoteright:181:http://static.tvtropes.org/pmwiki/pub/images/how_does_a_mask_die_anyway.png]]
* AttackItsWeakPoint: Initially, it's the chain holding the two together; afterwards, the heart itself becomes the weak point, and the mask can be incapacitated by attacking it from behind.
* CatAndMouseBoss: As with Mask of Infamy, the heart flees while the mask tries to run you down. The difference is that the heart is fully capable of fighting back, and the mask doesn't like to stay dead.
* DualBoss: As opposed to the original Mask of Infamy which is taken down one part at a time, both parts of The Visage attack simultaneously, and even come with a number of {{Combination Attack}}s.
* TurnsRed: Twice. Once when the chain is destroyed and gives the two parts of the Visage free movement, and a second time when the heart's health drops low and it changes its attack patterns.
* VariableLengthChain: The chain binding the heart and mask together in the initial phase, particularly noticeable when the mask charges and stretches the chain to around twice its usual length. During the second phase, the heart uses one in a number of its attacks.
!The Siren
[[quoteright:192:http://static.tvtropes.org/pmwiki/pub/images/boss_the_siren.png]]
----
* BulletHell: Like a number of other bosses, The Siren can unleash a dense array of bullets in all directions. Her shots actually curve in the air, making them harder to dodge.
* CharmPerson: Can steal your familiars with her voice and turn them against you.
* EnthrallingSiren: Her singing can lure your familiars over to her side.
* {{Expy}}: Of, oddly enough, the Gorgun from VideoGame/EnterTheGungeon, having several similar attacks and a similar appearance.
* PowerParasite: Effectively copies the abilities of your familiars by charming them. Things can get very messy if she steals something like Dry Baby or Dead Cat.
* StrippedToTheBone: The Siren is rapidly reduced to an inert skeleton upon death. [[spoiler:Destroying her skull unlocks a trinket.]]
!Mausoleum Mom
[[quoteright:141:http://static.tvtropes.org/pmwiki/pub/images/boss_mom.png]]
----
* AttackOfTheFiftyFootWhatever: Her boss fight.
* AxCrazy: Her goal is to kill her own son, and she doesn't sound too upset about it during the fight, what with the laughing and all.
* BodyHorror: The way Mom's body parts move throughout the fight (such as both eyes appearing on opposite sides of the room while she tries to stomp on you) suggest an ability to contort herself in rather...impossible ways.
* BossBanter: ''ISAAAAAC!''
* DeathByIrony: [[spoiler:Crushed by her own bible!]]
* DiscOneFinalBoss: Demoted to this on your second playthrough and beyond. She's still a Disc One boss in the alternate path, but in terms of floor number, she's faced much closer to the path's final boss than the main path's end.
* EvilIsVisceral: Likely the reason her body parts are detailed and somewhat deformed.
* EvilLaugh: She lets out one every time she successfully damages Isaac.
* EyeBeams: Mausoleum Mom gains the ability to fire Brimstone beams from her eye.
* TheFaceless: Her entire face is never shown at any point in the main game (the intro and epilogue don't count, as they're Isaac's cartoon drawings). This is [[SubvertedTrope subverted]] after you beat the Chest in ''WOTL'' or ''Rebirth'', but only briefly. In photographs, to be precise.
* FanDisservice: When Isaac uses the Mom's Bra item, a picture of his mother's shirtless torso flashes on the screen. A ''very'' unflattering picture of his mother's less-than-fit shirtless torso.
* FatBastard: As shown by her giant leg and the picture that shows up when using Mom's Bra.
* FinalBoss: In your first playthrough. She's nowhere near the TrueFinalBoss, though.
* FlunkyBoss: She'll summon groups of random enemies to battle Isaac.
* GameplayAndStoryIntegration: Using [[spoiler:the Bible]] instantly defeats her in her boss fight.
* GiantFootOfStomping: Her main method of direct attack.
* {{Gonk}}: Same deal as normal Mom.
* GrossUpCloseUp: One of her leg in the boss portrait, and one of her body in the picture that appears when using Mom's Bra.
* HumanoidAbomination: Most of what she does in-game and in a few cutscenes blatantly disregards normal body movements if not physics. She can step on her own eye, generally alter size, and [[spoiler:her arm can fit in a chest inside her heart inside her womb]].
* {{Leitmotif}}: ''Matricide'', as with normal Mom. [[spoiler:Mom's Heart, on the other hand, gets a new one in ''Gloria Filio''.]]
* MookMaker: And these mooks are a lot harder than last time!
* MotherOfAThousandYoung: If you go by the theory that the majority of the enemies are her former children.
* SayMyName: ISAAC!
* SkippableBoss: Provided you have [[spoiler:the Bible]] on you by the time you reach her, and it's fully charged.
* TacticalSuicideBoss: It's not actually mandatory, but making her stomp herself is possible, and deals lots of damage.
* TrickBoss: [[spoiler:Defeating her while holding the Knife Pieces throws you into a fight against Mom's Heart immediately afterwards.]]
* UndergroundMonkey: The version of Mom you encounter in the Mausoleum.
* YourSizeMayVary: Just how big is she? In the cutscenes, she's a normal-sized human being, but her underwear is the right size to be worn by a child visibly smaller than her, in the boss fight her leg is the length of the screen, and then [[spoiler:her womb is big enough to have two entire levels in it, with her heart being larger than Isaac]].
!Spiders
!!Strider/Rock Spider/Tinted Rock Spider/Coal Spider
!!Soi Creep
!!Fissure
Changed line(s) 260,282 (click to see context) from:
[[folder:Corpse]]
!The Scourge
[[quoteright:158:http://static.tvtropes.org/pmwiki/pub/images/not_an_evil_green_hedgehog.png]]
* BulletHell: Particularly notable is that one of its attacks has it sucking in bullets from the walls of the room.
* CombatTentacles: Has two of these tipped with sharp blades that it uses to lash out at you or confine you to a certain part of the room.
* FacelessEye: Its "head" consists of a single eye and nothing else.
* KingMook: To the Whipper enemies encountered in Mausoleum.
!Rotgut
[[quoteright:163:http://static.tvtropes.org/pmwiki/pub/images/worm_in_a_worm.png]]
* BackFromTheDead: Its third phase is effectively a decaying Mom's Heart.
* BodyHorror: It's some sort of gaping mouth with a giant maggot and rotten heart inside. Not something that should be inside ''anyone's'' body.
* SequentialBoss: Has three separate phases.
* StationaryBoss: In all three phases.
* UnexpectedGameplayChange: The second and third phases use Crawl Space physics and controls, turning the game into a 2-D platforming shooter.
!Chimera
[[quoteright:126:http://static.tvtropes.org/pmwiki/pub/images/could_lucas_beat_it.png]]
* ConfusionFu: Chimera has perhaps the widest range of attacks of any non-final boss in the game, which changes up in its second phase; as such, it can be a very unpredictable opponent.
* FastballSpecial: In its first phase, it can throw Sick Boom Flies at the player. In the second phase, it throws its own head.
* LosingYourHead: Chimera's head detaches when it takes enough damage, turning it into a DualBoss.
* MixAndMatchCritters: It's The Cage with Gurdy Jr. for a head.
!The Scourge
[[quoteright:158:http://static.tvtropes.org/pmwiki/pub/images/not_an_evil_green_hedgehog.png]]
* BulletHell: Particularly notable is that one of its attacks has it sucking in bullets from the walls of the room.
* CombatTentacles: Has two of these tipped with sharp blades that it uses to lash out at you or confine you to a certain part of the room.
* FacelessEye: Its "head" consists of a single eye and nothing else.
* KingMook: To the Whipper enemies encountered in Mausoleum.
!Rotgut
[[quoteright:163:http://static.tvtropes.org/pmwiki/pub/images/worm_in_a_worm.png]]
* BackFromTheDead: Its third phase is effectively a decaying Mom's Heart.
* BodyHorror: It's some sort of gaping mouth with a giant maggot and rotten heart inside. Not something that should be inside ''anyone's'' body.
* SequentialBoss: Has three separate phases.
* StationaryBoss: In all three phases.
* UnexpectedGameplayChange: The second and third phases use Crawl Space physics and controls, turning the game into a 2-D platforming shooter.
!Chimera
[[quoteright:126:http://static.tvtropes.org/pmwiki/pub/images/could_lucas_beat_it.png]]
* ConfusionFu: Chimera has perhaps the widest range of attacks of any non-final boss in the game, which changes up in its second phase; as such, it can be a very unpredictable opponent.
* FastballSpecial: In its first phase, it can throw Sick Boom Flies at the player. In the second phase, it throws its own head.
* LosingYourHead: Chimera's head detaches when it takes enough damage, turning it into a DualBoss.
* MixAndMatchCritters: It's The Cage with Gurdy Jr. for a head.
to:
!The Scourge
[[quoteright:158:http://static.tvtropes.org/pmwiki/pub/images/not_an_evil_green_hedgehog.png]]
* BulletHell: Particularly notable is that one of its attacks has it sucking in bullets from the walls of the room.
* CombatTentacles: Has two of these tipped with sharp blades that it uses to lash out at you or confine you to a certain part of the room.
* FacelessEye: Its "head" consists of a single eye and nothing else.
* KingMook: To the Whipper enemies encountered in Mausoleum.
!Rotgut
[[quoteright:163:http://static.tvtropes.org/pmwiki/pub/images/worm_in_a_worm.png]]
* BackFromTheDead: Its third phase is effectively a decaying Mom's Heart.
* BodyHorror: It's some sort of gaping mouth with a giant maggot and rotten heart inside. Not something that should be inside ''anyone's'' body.
* SequentialBoss: Has three separate phases.
* StationaryBoss: In all three phases.
* UnexpectedGameplayChange: The second and third phases use Crawl Space physics and controls, turning the game into a 2-D platforming shooter.
!Chimera
[[quoteright:126:http://static.tvtropes.org/pmwiki/pub/images/could_lucas_beat_it.png]]
* ConfusionFu: Chimera has perhaps the widest range of attacks of any non-final boss in the game, which changes up in its second phase; as such, it can be a very unpredictable opponent.
* FastballSpecial: In its first phase, it can throw Sick Boom Flies at the player. In the second phase, it throws its own head.
* LosingYourHead: Chimera's head detaches when it takes enough damage, turning it into a DualBoss.
* MixAndMatchCritters: It's The Cage with Gurdy Jr. for a head.
!!Hardy
!!Grilled Clotty
!!Floating Host/Hard Host
!!Cyst
!!Spikeball
!!Bomb Grimace/Quake Grimace
!!Pustule
!!Blind Bat/Echo Bat
!!Stillborn
!!Smoky
!!Candler/Nightwatch
!!Polty
!!Coil
!!Gyro/Grilled Gyro
!!Gasbag
Changed line(s) 285,287 (click to see context) from:
[[folder:The Final Boss]]
!The Witness
[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/400px_boss_the_witness.png]]
!The Witness
[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/400px_boss_the_witness.png]]
to:
!The Witness
[[quoteright:350:http://static.
[[folder:Normal Levels/Shared]]
!Baby Plum
[[quoteright:111:http://static.tvtropes.
* BulletHell: Very mild compared to most examples in the game, but it shoots a ''lot'' of projectiles for a boss you can fight on the first floor.
* KingMook: Of various flies, most notably the bloat flies.
* [[MascotMook Mascot Monster]]: Baby Plum is the mascot of the mod. Ironically, it is the only new boss that does not appear on any ''Antibirth'' floor[[note]]Reap Creep can show up in the Mines, and the Pile can show up in the Mausoleum[[/note]].
!The Pile
[[quoteright:192:http://static.tvtropes.org/pmwiki/pub/images/boss_the_pile.png]]
* BackFromTheDead: It's an undead version of Polycephalus and The Stain.
* BallisticBone: It can launch sprays of bone projectiles.
* DemBones: A fully skeletal version of Polycephalus.
* GetBackHereBoss: Like always, it pops up to attack and pulls away to hide.
!Reap Creep
[[quoteright:232:http://static.tvtropes.org/pmwiki/pub/images/thats_one_big_spider.png]]
* AllYourPowersCombined: Reap Creep combines the abilities of all three varieties of Wall Creep in the vanilla game and turns them UpToEleven.
* BeamSpam: Its third phase can fire a spray of four sweeping Brimstone beams.
* GiantSpider: It's a giant Wall Creep around the size of Widow.
* KingMook: Of the creeps.
* MookMaker: Spawns a lot of creeps to harass the player. It can also shake spiders loose from the ceiling.
* SequentialBoss: Has three phases, each imitating a different Wall Creep, all with different attacks. Its first phase primarily fires long chains of bullets aimed at the player, its second phase shoots wide spreads, and its third phase attacks with Brimstone lasers.
[[/folder]]
[[folder:Downpour]]
!Wormwood
[[quoteright:133:http://static.tvtropes.org/pmwiki/pub/images/no_relation_to_the_teacher.png]]
* BossArenaUrgency: It can punch holes in the floor with its tail. Given the way pits work in this game, this won't kill you, but it does make it more difficult to dodge Wormwood's attacks and gives it more places to ambush you from.
* DeadlyLunge: Gains a ''very'' fast one when it's at low health.
* MakingASplash: Its projectiles appear to be water, as opposed to the standard blood projectiles.
* MeaningfulName: Named after the biblical [[https://en.wikipedia.org/wiki/Wormwood_(Bible) Wormwood]], a star which will fall and turn a third of Earth's waters bitter and deadly.
* TurnsRed: It becomes much more aggressive and will start making holes in the ground at low health.
* UndergroundMonkey: It's more or less an underwater Pin with [[TookALevelInBadass five additional levels in badass]].
!Beelzeblub
[[quoteright:192:http://static.tvtropes.org/pmwiki/pub/images/boss_beelzeblub.png]]
* FlunkyBoss: Just like the original Duke of Flies, but with small leeches instead of flies.
* PunnyName: "Beelzebub" + "blub", an onomatopoeia for bubbling water.
* UndergroundMonkey: A drowned, but still animate, version of the Duke of Flies.
!The Rainmaker
[[quoteright:89:http://static.tvtropes.org/pmwiki/pub/images/let_it_rain.png]]
* BattleInTheRain: The battle against him is accompanied by a constant downpour that stops when he's defeated.
* DanceBattler: His movements in battle borrow heavily from the flamenco.
* MakingASplash: Rainmaker's attacks all have him levitating balls of water to hurl at the player.
* SomethingAboutARose: He carries a rose in his mouth in the VersusCharacterSplash. In the fight itself, it's mostly absent except when he pulls it out after one of his attacks.
!!The Haunt
[[quoteright:150:http://static.tvtropes.org/pmwiki/pub/images/spooky_scary_son_of_a.png]]
-> Debut: ''Rebirth''
* BedsheetGhost: What's underneath its sheet is quite a bit scarier, however.
* FlyingFace: That rips itself open to reveal a [[SkullForAHead skull]] when its minions are dealt with.
* FlunkyBoss: He is surrounded by three Lil Haunts which attack before he does. First one attacks, then the other two do. He's invulnerable until they're dead and he moves to the top of the room. His black Champion version spawns spiders instead of shooting Brimstone.
* FrickinLaserBeams: In his second phase, he'll fire Brimstone downwards as he strafes along the top of the screen.
* HeelFaceTurn: The Lil' Haunt item gives you a friendly Lil' Haunt who chases your enemies.
* {{Intangibility}}: Until his minions are dead.
* KingMook: To the Lil' Haunts.
* TheLastOfTheseIsNotLikeTheOthers: All of the other bosses in the alternate route are either original to the mod or rehashed for it. The Haunt, on the other hand, is taken directly from the base game with no modifications. This is likely so that Downpour can have at least four bosses along with the other three new floors, as the new Basement/Cellar boss Baby Plum does not appear in the floor's alternate counterpart for whatever reason.
* NoFairCheating: He normally paces from side to side along the top edge of the screen, shooting downwards. If you try to move to the top where he can't shoot you, he'll immediately charge at you to cause damage. Which ''hurts like '''crazy.''''' Of course, if you're fast enough you can dodge it and still hurt the boss before it loops back.
* OurGhostsAreDifferent: This one has a skeleton. Which he'll gladly show to you.
* ThePawnsGoFirst: Sends his Lil' Haunt minions to attack you while he himself remains intangible. When they go down, then he fights you.
[[/folder]]
[[folder:Mines]]
!Tuff Twins
[[quoteright:203:http://static.tvtropes.org/pmwiki/pub/images/boss_tuff_twins.png]]
* BossArenaIdiocy: The Tuff Twins start out covered in a rock shell that makes them impervious to attack and must be broken with explosions. Their boss room always happens to contain a number of Bomb Grimaces that provide free bombs to chuck at them, and occasionally a couple of TNT barrels as well.
* FlunkyBoss: They spawn Inks (which release four bullets in the diagonal directions on death along with a puddle of slowing creep) to harass the player throughout the fight. If their head is exposed, they switch to Suckers instead.
* ShedArmorGainSpeed: They become faster as you blow up their stone armor.
* UndergroundMonkey: Stone-encrusted versions of Larry Jr.
!Great Gideon
[[quoteright:126:http://static.tvtropes.org/pmwiki/pub/images/a_scott_pilgrim_reference.png]]
* AllYourPowersCombined: Combines the abilities of all Grimace varieties in ''Rebirth'' and the new Quake Grimace in ''Antibirth''.
* EasterEgg: Throwing a Chaos Card at him will instantly kill him,as well as [[spoiler:open a hidden crawl space that holds several items and chests]].
* FireBreathingWeapon: One of Gideon's attacks has it spewing fiery bullets down the middle of the room, which will leave lingering fires on the ground. It also exploits this by summoning a number of enemies that [[InfernalRetaliation become more powerful when lit on fire]].
* FlunkyBoss: Summons six waves of enemies to attack you in addition to shooting at you himself. Defeating all of the minions ends the fight.
* KingMook: To the Grimaces.
* NighInvulnerable: Like the [[InvincibleMinorMinion enemies]] he's based on, Great Gideon is immune to everything that's not a Chaos Card, and defeating the other enemies in the room causes him to shut down.
!Hornfel
[[quoteright:74:http://static.tvtropes.org/pmwiki/pub/images/i_wanna_take_you_for_a_minecart_ride.png]]
* MadBomber: His main modus operandi is to ride around on his minecart, chucking various bombs at you.
* MinecartMadness: Inverted. He's the one on the minecart, but you're still the one doing the dodging.
* ScoobyDoobyDoors: His boss room is lined with them, and Hornfel can emerge from any one at any time. Of course, the player can't use them.
* ScrewThisImOuttaHere: Depleting his health causes his minecart to be destroyed, at which point Hornfel will run for the nearest door. This makes Hornfel the only boss that can be defeated non-lethally, but you do get a chance at a bomb-based item if you kill him before he escapes.
* ShoutOut: The Brimstone bombs he uses are visually based on the grenades launched by the Iron Bomber, an unlockable weapon in VideoGame/TeamFortress2 which was originally designed and submitted to the Steam Workshop by Kilburn (one of the mod's creators).
* SuperSpit: His main non-bomb attack has him continually speeding up on his minecart, only to end up going so fast that he gets sick and [[VomitIndiscretionShot projectile vomits in your general direction]]. The puke, of course, explodes.
* TrickBomb: Hornfel's bombs use several different modifiers: he can throw Hot Bombs which leave damaging fire behind, Rock Bombs which send rock waves in the cardinal directions, and a unique Brimstone bomb that explodes into a four-way Brimstone laser.
[[/folder]]
[[folder:Mausoleum]]
!The Heretic
[[quoteright:192:http://static.tvtropes.org/pmwiki/pub/images/boss_the_heretic.png]]
Added DiffLines:
* KaizoTrap: After it dies, the fire in its eye falls to the ground and erupts into a four-way burst, possibly damaging you if you're not paying attention.
* NonHumanUndead: It's an undead ghost. Try to wrap your head around that.
* OurGhostsAreDifferent: And apparently more undead.
* ReflectingLaser: His boss room always comes with a number of extinguished fireplaces. One of his attacks lights them up, then fires a Brimstone beam that chains between them.
* UngratefulBastard: It gets revived by cultists, and it thanks them by turning them into {{Mooks}} to send after you.
!The Visage
[[quoteright:181:http://static.tvtropes.org/pmwiki/pub/images/how_does_a_mask_die_anyway.png]]
* AttackItsWeakPoint: Initially, it's the chain holding the two together; afterwards, the heart itself becomes the weak point, and the mask can be incapacitated by attacking it from behind.
* CatAndMouseBoss: As with Mask of Infamy, the heart flees while the mask tries to run you down. The difference is that the heart is fully capable of fighting back, and the mask doesn't like to stay dead.
* DualBoss: As opposed to the original Mask of Infamy which is taken down one part at a time, both parts of The Visage attack simultaneously, and even come with a number of {{Combination Attack}}s.
* TurnsRed: Twice. Once when the chain is destroyed and gives the two parts of the Visage free movement, and a second time when the heart's health drops low and it changes its attack patterns.
* VariableLengthChain: The chain binding the heart and mask together in the initial phase, particularly noticeable when the mask charges and stretches the chain to around twice its usual length. During the second phase, the heart uses one in a number of its attacks.
!The Siren
[[quoteright:192:http://static.tvtropes.org/pmwiki/pub/images/boss_the_siren.png]]
----
* BulletHell: Like a number of other bosses, The Siren can unleash a dense array of bullets in all directions. Her shots actually curve in the air, making them harder to dodge.
* CharmPerson: Can steal your familiars with her voice and turn them against you.
* EnthrallingSiren: Her singing can lure your familiars over to her side.
* {{Expy}}: Of, oddly enough, the Gorgun from VideoGame/EnterTheGungeon, having several similar attacks and a similar appearance.
* PowerParasite: Effectively copies the abilities of your familiars by charming them. Things can get very messy if she steals something like Dry Baby or Dead Cat.
* StrippedToTheBone: The Siren is rapidly reduced to an inert skeleton upon death. [[spoiler:Destroying her skull unlocks a trinket.]]
!Mausoleum Mom
[[quoteright:141:http://static.tvtropes.org/pmwiki/pub/images/boss_mom.png]]
----
* AttackOfTheFiftyFootWhatever: Her boss fight.
* AxCrazy: Her goal is to kill her own son, and she doesn't sound too upset about it during the fight, what with the laughing and all.
* BodyHorror: The way Mom's body parts move throughout the fight (such as both eyes appearing on opposite sides of the room while she tries to stomp on you) suggest an ability to contort herself in rather...impossible ways.
* BossBanter: ''ISAAAAAC!''
* DeathByIrony: [[spoiler:Crushed by her own bible!]]
* DiscOneFinalBoss: Demoted to this on your second playthrough and beyond. She's still a Disc One boss in the alternate path, but in terms of floor number, she's faced much closer to the path's final boss than the main path's end.
* EvilIsVisceral: Likely the reason her body parts are detailed and somewhat deformed.
* EvilLaugh: She lets out one every time she successfully damages Isaac.
* EyeBeams: Mausoleum Mom gains the ability to fire Brimstone beams from her eye.
* TheFaceless: Her entire face is never shown at any point in the main game (the intro and epilogue don't count, as they're Isaac's cartoon drawings). This is [[SubvertedTrope subverted]] after you beat the Chest in ''WOTL'' or ''Rebirth'', but only briefly. In photographs, to be precise.
* FanDisservice: When Isaac uses the Mom's Bra item, a picture of his mother's shirtless torso flashes on the screen. A ''very'' unflattering picture of his mother's less-than-fit shirtless torso.
* FatBastard: As shown by her giant leg and the picture that shows up when using Mom's Bra.
* FinalBoss: In your first playthrough. She's nowhere near the TrueFinalBoss, though.
* FlunkyBoss: She'll summon groups of random enemies to battle Isaac.
* GameplayAndStoryIntegration: Using [[spoiler:the Bible]] instantly defeats her in her boss fight.
* GiantFootOfStomping: Her main method of direct attack.
* {{Gonk}}: Same deal as normal Mom.
* GrossUpCloseUp: One of her leg in the boss portrait, and one of her body in the picture that appears when using Mom's Bra.
* HumanoidAbomination: Most of what she does in-game and in a few cutscenes blatantly disregards normal body movements if not physics. She can step on her own eye, generally alter size, and [[spoiler:her arm can fit in a chest inside her heart inside her womb]].
* {{Leitmotif}}: ''Matricide'', as with normal Mom. [[spoiler:Mom's Heart, on the other hand, gets a new one in ''Gloria Filio''.]]
* MookMaker: And these mooks are a lot harder than last time!
* MotherOfAThousandYoung: If you go by the theory that the majority of the enemies are her former children.
* SayMyName: ISAAC!
* SkippableBoss: Provided you have [[spoiler:the Bible]] on you by the time you reach her, and it's fully charged.
* TacticalSuicideBoss: It's not actually mandatory, but making her stomp herself is possible, and deals lots of damage.
* TrickBoss: [[spoiler:Defeating her while holding the Knife Pieces throws you into a fight against Mom's Heart immediately afterwards.]]
* UndergroundMonkey: The version of Mom you encounter in the Mausoleum.
* YourSizeMayVary: Just how big is she? In the cutscenes, she's a normal-sized human being, but her underwear is the right size to be worn by a child visibly smaller than her, in the boss fight her leg is the length of the screen, and then [[spoiler:her womb is big enough to have two entire levels in it, with her heart being larger than Isaac]].
[[/folder]]
[[folder:Corpse]]
!The Scourge
[[quoteright:158:http://static.tvtropes.org/pmwiki/pub/images/not_an_evil_green_hedgehog.png]]
* BulletHell: Particularly notable is that one of its attacks has it sucking in bullets from the walls of the room.
* CombatTentacles: Has two of these tipped with sharp blades that it uses to lash out at you or confine you to a certain part of the room.
* FacelessEye: Its "head" consists of a single eye and nothing else.
* KingMook: To the Whipper enemies encountered in Mausoleum.
!Rotgut
[[quoteright:163:http://static.tvtropes.org/pmwiki/pub/images/worm_in_a_worm.png]]
* BackFromTheDead: Its third phase is effectively a decaying Mom's Heart.
* BodyHorror: It's some sort of gaping mouth with a giant maggot and rotten heart inside. Not something that should be inside ''anyone's'' body.
* SequentialBoss: Has three separate phases.
* StationaryBoss: In all three phases.
* UnexpectedGameplayChange: The second and third phases use Crawl Space physics and controls, turning the game into a 2-D platforming shooter.
!Chimera
[[quoteright:126:http://static.tvtropes.org/pmwiki/pub/images/could_lucas_beat_it.png]]
* ConfusionFu: Chimera has perhaps the widest range of attacks of any non-final boss in the game, which changes up in its second phase; as such, it can be a very unpredictable opponent.
* FastballSpecial: In its first phase, it can throw Sick Boom Flies at the player. In the second phase, it throws its own head.
* LosingYourHead: Chimera's head detaches when it takes enough damage, turning it into a DualBoss.
* MixAndMatchCritters: It's The Cage with Gurdy Jr. for a head.
[[/folder]]
[[folder:The Final Boss]]
!The Witness
[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/400px_boss_the_witness.png]]
----
* NonHumanUndead: It's an undead ghost. Try to wrap your head around that.
* OurGhostsAreDifferent: And apparently more undead.
* ReflectingLaser: His boss room always comes with a number of extinguished fireplaces. One of his attacks lights them up, then fires a Brimstone beam that chains between them.
* UngratefulBastard: It gets revived by cultists, and it thanks them by turning them into {{Mooks}} to send after you.
!The Visage
[[quoteright:181:http://static.tvtropes.org/pmwiki/pub/images/how_does_a_mask_die_anyway.png]]
* AttackItsWeakPoint: Initially, it's the chain holding the two together; afterwards, the heart itself becomes the weak point, and the mask can be incapacitated by attacking it from behind.
* CatAndMouseBoss: As with Mask of Infamy, the heart flees while the mask tries to run you down. The difference is that the heart is fully capable of fighting back, and the mask doesn't like to stay dead.
* DualBoss: As opposed to the original Mask of Infamy which is taken down one part at a time, both parts of The Visage attack simultaneously, and even come with a number of {{Combination Attack}}s.
* TurnsRed: Twice. Once when the chain is destroyed and gives the two parts of the Visage free movement, and a second time when the heart's health drops low and it changes its attack patterns.
* VariableLengthChain: The chain binding the heart and mask together in the initial phase, particularly noticeable when the mask charges and stretches the chain to around twice its usual length. During the second phase, the heart uses one in a number of its attacks.
!The Siren
[[quoteright:192:http://static.tvtropes.org/pmwiki/pub/images/boss_the_siren.png]]
----
* BulletHell: Like a number of other bosses, The Siren can unleash a dense array of bullets in all directions. Her shots actually curve in the air, making them harder to dodge.
* CharmPerson: Can steal your familiars with her voice and turn them against you.
* EnthrallingSiren: Her singing can lure your familiars over to her side.
* {{Expy}}: Of, oddly enough, the Gorgun from VideoGame/EnterTheGungeon, having several similar attacks and a similar appearance.
* PowerParasite: Effectively copies the abilities of your familiars by charming them. Things can get very messy if she steals something like Dry Baby or Dead Cat.
* StrippedToTheBone: The Siren is rapidly reduced to an inert skeleton upon death. [[spoiler:Destroying her skull unlocks a trinket.]]
!Mausoleum Mom
[[quoteright:141:http://static.tvtropes.org/pmwiki/pub/images/boss_mom.png]]
----
* AttackOfTheFiftyFootWhatever: Her boss fight.
* AxCrazy: Her goal is to kill her own son, and she doesn't sound too upset about it during the fight, what with the laughing and all.
* BodyHorror: The way Mom's body parts move throughout the fight (such as both eyes appearing on opposite sides of the room while she tries to stomp on you) suggest an ability to contort herself in rather...impossible ways.
* BossBanter: ''ISAAAAAC!''
* DeathByIrony: [[spoiler:Crushed by her own bible!]]
* DiscOneFinalBoss: Demoted to this on your second playthrough and beyond. She's still a Disc One boss in the alternate path, but in terms of floor number, she's faced much closer to the path's final boss than the main path's end.
* EvilIsVisceral: Likely the reason her body parts are detailed and somewhat deformed.
* EvilLaugh: She lets out one every time she successfully damages Isaac.
* EyeBeams: Mausoleum Mom gains the ability to fire Brimstone beams from her eye.
* TheFaceless: Her entire face is never shown at any point in the main game (the intro and epilogue don't count, as they're Isaac's cartoon drawings). This is [[SubvertedTrope subverted]] after you beat the Chest in ''WOTL'' or ''Rebirth'', but only briefly. In photographs, to be precise.
* FanDisservice: When Isaac uses the Mom's Bra item, a picture of his mother's shirtless torso flashes on the screen. A ''very'' unflattering picture of his mother's less-than-fit shirtless torso.
* FatBastard: As shown by her giant leg and the picture that shows up when using Mom's Bra.
* FinalBoss: In your first playthrough. She's nowhere near the TrueFinalBoss, though.
* FlunkyBoss: She'll summon groups of random enemies to battle Isaac.
* GameplayAndStoryIntegration: Using [[spoiler:the Bible]] instantly defeats her in her boss fight.
* GiantFootOfStomping: Her main method of direct attack.
* {{Gonk}}: Same deal as normal Mom.
* GrossUpCloseUp: One of her leg in the boss portrait, and one of her body in the picture that appears when using Mom's Bra.
* HumanoidAbomination: Most of what she does in-game and in a few cutscenes blatantly disregards normal body movements if not physics. She can step on her own eye, generally alter size, and [[spoiler:her arm can fit in a chest inside her heart inside her womb]].
* {{Leitmotif}}: ''Matricide'', as with normal Mom. [[spoiler:Mom's Heart, on the other hand, gets a new one in ''Gloria Filio''.]]
* MookMaker: And these mooks are a lot harder than last time!
* MotherOfAThousandYoung: If you go by the theory that the majority of the enemies are her former children.
* SayMyName: ISAAC!
* SkippableBoss: Provided you have [[spoiler:the Bible]] on you by the time you reach her, and it's fully charged.
* TacticalSuicideBoss: It's not actually mandatory, but making her stomp herself is possible, and deals lots of damage.
* TrickBoss: [[spoiler:Defeating her while holding the Knife Pieces throws you into a fight against Mom's Heart immediately afterwards.]]
* UndergroundMonkey: The version of Mom you encounter in the Mausoleum.
* YourSizeMayVary: Just how big is she? In the cutscenes, she's a normal-sized human being, but her underwear is the right size to be worn by a child visibly smaller than her, in the boss fight her leg is the length of the screen, and then [[spoiler:her womb is big enough to have two entire levels in it, with her heart being larger than Isaac]].
[[/folder]]
[[folder:Corpse]]
!The Scourge
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* BulletHell: Particularly notable is that one of its attacks has it sucking in bullets from the walls of the room.
* CombatTentacles: Has two of these tipped with sharp blades that it uses to lash out at you or confine you to a certain part of the room.
* FacelessEye: Its "head" consists of a single eye and nothing else.
* KingMook: To the Whipper enemies encountered in Mausoleum.
!Rotgut
[[quoteright:163:http://static.tvtropes.org/pmwiki/pub/images/worm_in_a_worm.png]]
* BackFromTheDead: Its third phase is effectively a decaying Mom's Heart.
* BodyHorror: It's some sort of gaping mouth with a giant maggot and rotten heart inside. Not something that should be inside ''anyone's'' body.
* SequentialBoss: Has three separate phases.
* StationaryBoss: In all three phases.
* UnexpectedGameplayChange: The second and third phases use Crawl Space physics and controls, turning the game into a 2-D platforming shooter.
!Chimera
[[quoteright:126:http://static.tvtropes.org/pmwiki/pub/images/could_lucas_beat_it.png]]
* ConfusionFu: Chimera has perhaps the widest range of attacks of any non-final boss in the game, which changes up in its second phase; as such, it can be a very unpredictable opponent.
* FastballSpecial: In its first phase, it can throw Sick Boom Flies at the player. In the second phase, it throws its own head.
* LosingYourHead: Chimera's head detaches when it takes enough damage, turning it into a DualBoss.
* MixAndMatchCritters: It's The Cage with Gurdy Jr. for a head.
[[/folder]]
[[folder:The Final Boss]]
!The Witness
[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/400px_boss_the_witness.png]]
----
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* SingleMindedTwins: Downplayed. Despite both brothers moving in unison both can/have to use separate items.
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* SingleMindedTwins: Downplayed. Despite both brothers moving in unison both can/have to use separate items.items, and they can be controlled separately.
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* MagicarpPower: Bethany's inability to pick up soul hearts means that one would have less health over all, and needs to avoid taking damage ''period'' to have a good chance at getting an Angel/Devil room for the floor. However, the soul hearts function to get much more use out of her starting item, and with enough cleared rooms and/or soul hearts picked up, she could have a huge multi-layered tornado of flames that ''each'' fires a spectral shot on its own.
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* MagicarpPower: MagikarpPower: Bethany's inability to pick up soul hearts means that one would have less health over all, and needs to avoid taking damage ''period'' to have a good chance at getting an Angel/Devil room for the floor.floor, to say nothing of the fancy dodging required to build up flames with Book of Virtues. However, the soul hearts function to get much more use out of her starting item, and with enough cleared rooms and/or soul hearts picked up, she could have a huge multi-layered tornado of flames that ''each'' fires a spectral shot on its own.
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* SecretArt: Bethany is the only character capable of spawning white and black flames with Book of Virtues, by consuming Immortal and black hearts from her counter. Black flames can inflict fear with their shots, while white flames can regenerate themselves and other flames and their shots can block enemy tears.
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* SequentialBoss: Has three phases, each imitating a different Wall Creep, all with different attacks.
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* SequentialBoss: Has three phases, each imitating a different Wall Creep, all with different attacks.
attacks. Its first phase primarily fires long chains of bullets aimed at the player, its second phase shoots wide spreads, and its third phase attacks with Brimstone lasers.
* FlunkyBoss: They spawn Inks (which release four bullets in the diagonal directions on death along with a puddle of slowing creep) to harass the player throughout the fight. If their head is exposed, they switch to Suckers instead.
* FireBreathingWeapon: One of Gideon's attacks has it spewing fiery bullets down the middle of the room, which will leave lingering fires on the ground. It also exploits this by summoning a number of enemies that [[InfernalRetaliation become more powerful when lit on fire]].
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* ShoutOut: The Brimstone bombs he uses are visually based on the grenades launched by the Iron Bomber, an unlockable weapon in VideoGame/TeamFortress2 which was originally designed and submitted to the Steam Workshop by Kilburn (one of the mod's creators).
* SuperSpit: His main non-bomb attack has him continually speeding up on his minecart, only to end up going so fast that he gets sick and [[VomitIndiscretionShot projectile vomits in your general direction]]. The puke, of course, explodes.
* TrickBomb: Hornfel's bombs use several different modifiers: he can throw Hot Bombs which leave damaging fire behind, Rock Bombs which send rock waves in the cardinal directions, and a unique Brimstone bomb that explodes into a four-way Brimstone laser.
* SuperSpit: His main non-bomb attack has him continually speeding up on his minecart, only to end up going so fast that he gets sick and [[VomitIndiscretionShot projectile vomits in your general direction]]. The puke, of course, explodes.
* TrickBomb: Hornfel's bombs use several different modifiers: he can throw Hot Bombs which leave damaging fire behind, Rock Bombs which send rock waves in the cardinal directions, and a unique Brimstone bomb that explodes into a four-way Brimstone laser.
* TurnsRed: Twice. Once when the chain is destroyed and gives the two parts of the Visage free movement, and a second time when the heart's health drops low and it changes its attack patterns.
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* CombatTentacles: Has two of these tipped with sharp blades that it uses to lash out at you.
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* CombatTentacles: Has two of these tipped with sharp blades that it uses to lash out at you.you or confine you to a certain part of the room.
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* ConfusionFu: Chimera has perhaps the widest range of attacks of any non-final boss in the game, which changes up in its second phase; as such, it can be a very unpredictable opponent.
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That's all the images,except for The Pile,Beelzeblub, and the Tuff Twins- Their images overlapped with the "thick" lines and didn't look aesthetically pleasing. If someone could get the images from the Antibirth Wiki and shrink them or something,that'd be great.
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Should the Easter Egg be listed as a Outside The Box Tactic as well?
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* EasterEgg: Throwing a Chaos Card at him will instantly kill him,as well as [[spoiler:open a hidden crawl space that holds several items and chests]].
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The Haunt already had a picture in here,but it had a white background that was visible in Dark Mode.
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Adding images to the bosses. Might need some work.
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* MagicarpPower: Bethany's inability to pick up soul hearts means that one would have less health over all, and needs to avoid taking damage ''period'' to have a good chance at getting an Angel/Devil room for the floor. However, the soul hearts function to get much more use out of her starting item, and with enough cleared rooms and/or soul hearts picked up, she could have a huge multi-layered tornado of flames that ''each'' fires a spectral shot on its own.
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* [[MascotMook Mascot Monster]]: Baby Plum is the mascot of the mod.
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* [[MascotMook Mascot Monster]]: Baby Plum is the mascot of the mod.
mod. Ironically, it is the only new boss that does not appear on any ''Antibirth'' floor[[note]]Reap Creep can show up in the Mines, and the Pile can show up in the Mausoleum[[/note]].
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* TheLastOfTheseIsNotLikeTheOthers: All of the other bosses in the alternate route are either original to the mod or rehashed for it. The Haunt, on the other hand, is taken directly from the base game with no modifications.
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* TheLastOfTheseIsNotLikeTheOthers: All of the other bosses in the alternate route are either original to the mod or rehashed for it. The Haunt, on the other hand, is taken directly from the base game with no modifications. This is likely so that Downpour can have at least four bosses along with the other three new floors, as the new Basement/Cellar boss Baby Plum does not appear in the floor's alternate counterpart for whatever reason.
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* DiscOneFinalBoss: Demoted to this on your second playthrough and beyond.
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* DiscOneFinalBoss: Demoted to this on your second playthrough and beyond. She's still a Disc One boss in the alternate path, but in terms of floor number, she's faced much closer to the path's final boss than the main path's end.
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* AttackOfTheFiftyFootWhatever: ''The'' biggest boss in the game (barring perhaps Mega Satan), taking up the entire top wall of a 2x2 room.
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* AttackOfTheFiftyFootWhatever: ''The'' biggest boss in the game (barring perhaps Mega Satan), Satan, or Mom counting the unseen rest of her body), taking up the entire top wall of a 2x2 room.
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* EvilOverlooker: Its boss portrait has the Witness looming over Isaac in this fashion.
* FinalBoss: Of the Antibirth content.
* FinalBoss: Of the Antibirth content.
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* EvilOverlooker: Its boss portrait has the Witness looming over Isaac in this fashion.
fashion, instead of the "facing Isaac from the side" view of every single other boss.
* FinalBoss: Of theAntibirth ''Antibirth'' content.
* FinalBoss: Of the
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* BossArenaUrgency: It can punch holes in the floor with its tail. Given the way pits work in this game, this won't kill you, but it does make it more difficult to dodge Wormwood's attacks.
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* BossArenaUrgency: It can punch holes in the floor with its tail. Given the way pits work in this game, this won't kill you, but it does make it more difficult to dodge Wormwood's attacks.attacks and gives it more places to ambush you from.
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* AllYourPowersCombined: Combines the abilities of all Grimace varieties in ''Rebirth'' and the new Rock Grimace in ''Antibirth''.
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* AllYourPowersCombined: Combines the abilities of all Grimace varieties in ''Rebirth'' and the new Rock Quake Grimace in ''Antibirth''.
* ScoobyDoobyDoors: His boss room is lined with them, and Hornfel can emerge from any one at any time. Of course, the player can't use them.
* CatAndMouseBoss: As with Mask of Infamy, the heart flees while the mask tries to run you down. The difference is that the heart is fully capable of fighting back, and the mask doesn't like to stay dead.
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* KingMook: To the Whipper enemies encountered in Mausoleum.
* BackFromTheDead: Its third phase is effectively a decaying Mom's Heart.
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* UnexpectedGameplayChange: The second and third phases use Crawl Space physics and controls, turning the game into a 2-D shooter.
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* StationaryBoss: In all three phases.
* UnexpectedGameplayChange: The second and third phases use Crawl Space physics and controls, turning the game into a 2-D platforming shooter.
* UnexpectedGameplayChange: The second and third phases use Crawl Space physics and controls, turning the game into a 2-D platforming shooter.
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* FastballSpecial: In its first phase, it can throw Sick Boom Flies at the player. In the second phase, it throws its own head.
* LosingYourHead: Chimera's head detaches when it takes enough damage, turning it into a DualBoss.
* MixAndMatchCritters: It's The Cage with Gurdy Jr. for a head.
[[/folder]]
[[folder:The Final Boss]]
* LosingYourHead: Chimera's head detaches when it takes enough damage, turning it into a DualBoss.
* MixAndMatchCritters: It's The Cage with Gurdy Jr. for a head.
[[/folder]]
[[folder:The Final Boss]]
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* AttackOfTheFiftyFootWhatever: ''The'' biggest boss in the game (barring perhaps Mega Satan), taking up the entire top wall of a 2x2 room.
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* InterfaceScrew: A minor example. The Witness's fight takes place in a quadruple-size room that is zoomed out so that the entire room is visible.
* KnifeNut: One of its attacks has it pulling out and throwing a gigantic knife.
* KnifeNut: One of its attacks has it pulling out and throwing a gigantic knife.
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* {{Leitmotif}}: Averted; unlike the base game's Mom, this fight recycles the normal boss theme. [[spoiler:Mom's Heart, on the other hand, gets a new one in ''Gloria Filio''.]]
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* {{Leitmotif}}: Averted; unlike the base game's Mom, this fight recycles the ''Matricide'', as with normal boss theme.Mom. [[spoiler:Mom's Heart, on the other hand, gets a new one in ''Gloria Filio''.]]
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* BulletHell: Particularly notable is that one of its attacks has it sucking in bullets from the walls of the room.
* CombatTentacles: Has two of these tipped with sharp blades that it uses to lash out at you.
* FacelessEye: Its "head" consists of a single eye and nothing else.
* CombatTentacles: Has two of these tipped with sharp blades that it uses to lash out at you.
* FacelessEye: Its "head" consists of a single eye and nothing else.
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* BodyHorror: It's some sort of gaping mouth with a giant maggot and rotten heart inside. Not something that should be inside ''anyone's'' body.
* SequentialBoss: Has three separate phases.
* UnexpectedGameplayChange: The second and third phases use Crawl Space physics and controls, turning the game into a 2-D shooter.
* SequentialBoss: Has three separate phases.
* UnexpectedGameplayChange: The second and third phases use Crawl Space physics and controls, turning the game into a 2-D shooter.
* BodyHorror: ''Oh yes''. Not only is it a decayed version of a boss that's already pretty far in Body Horror territory, but when its head detaches, it exposes two more skulls where its shoulders would be.
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* MarathonBoss: Shockingly, [[AvertedTrope Averted]]; while the fight against it is still longer than a normal fight, it lacks the scaling damage resistance that the canon final bosses have, meaning that it's a relative GlassCannon.
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* MarathonBoss: Shockingly, [[AvertedTrope Averted]]; while Downplayed. While the fight against it is still longer than a normal fight, it lacks the scaling damage resistance that the canon final bosses have, meaning that it's a relative GlassCannon.
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A list of characters who appear in ''VideoGame/TheBindingOfIsaac Anitbirth''. Currently under construction, please contribute!
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A list of characters who appear in ''VideoGame/TheBindingOfIsaac Anitbirth''.''VideoGame/TheBindingOfIsaacAntibirth''. Currently under construction, please contribute!
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* FlunkyBoss: Just like the original Duke of Flies, but with small leeches instead of flies.
* PunnyName: "Beelzebub" + "blub", an onomatopoeia for bubbling water.
* UndergroundMonkey: A drowned, but still animate, version of the Duke of Flies.
* PunnyName: "Beelzebub" + "blub", an onomatopoeia for bubbling water.
* UndergroundMonkey: A drowned, but still animate, version of the Duke of Flies.
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* SomethingAboutARose: He carries a rose in his mouth.
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* SomethingAboutARose: He carries a rose in his mouth.
mouth in the VersusCharacterSplash. In the fight itself, it's mostly absent except when he pulls it out after one of his attacks.
* TheLastOfTheseIsNotLikeTheOthers: All of the other bosses in the alternate route are either original to the mod or rehashed for it. The Haunt, on the other hand, is taken directly from the base game with no modifications.
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* AllYourPowersCombined: Combines the abilities of all Grimace varieties in ''Rebirth'' and the new Rock Grimace in ''Antibirth''.
* FlunkyBoss: Summons six waves of enemies to attack you in addition to shooting at you himself. Defeating all of the minions ends the fight.
* KingMook: To the Grimaces.
* NighInvulnerable: Like the [[InvincibleMinorMinion enemies]] he's based on, Great Gideon is immune to everything that's not a Chaos Card, and defeating the other enemies in the room causes him to shut down.
* FlunkyBoss: Summons six waves of enemies to attack you in addition to shooting at you himself. Defeating all of the minions ends the fight.
* KingMook: To the Grimaces.
* NighInvulnerable: Like the [[InvincibleMinorMinion enemies]] he's based on, Great Gideon is immune to everything that's not a Chaos Card, and defeating the other enemies in the room causes him to shut down.
* ReflectingLaser: His boss room always comes with a number of extinguished fireplaces. One of his attacks lights them up, then fires a Brimstone beam that chains between them.
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* AttackItsWeakPoint: Initially, it's the chain holding the two together; afterwards, the mask must be attacked from behind.
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* AttackItsWeakPoint: Initially, it's the chain holding the two together; afterwards, the heart itself becomes the weak point, and the mask must can be attacked incapacitated by attacking it from behind.
* DualBoss: As opposed to the original Mask of Infamy which is taken down one part at a time, both parts of The Visage attack simultaneously, and even come with a number of {{Combination Attack}}s.
* VariableLengthChain: The chain binding the heart and mask together in the initial phase, particularly noticeable when the mask charges and stretches the chain to around twice its usual length. During the second phase, the heart uses one in a number of its attacks.
* DualBoss: As opposed to the original Mask of Infamy which is taken down one part at a time, both parts of The Visage attack simultaneously, and even come with a number of {{Combination Attack}}s.
* VariableLengthChain: The chain binding the heart and mask together in the initial phase, particularly noticeable when the mask charges and stretches the chain to around twice its usual length. During the second phase, the heart uses one in a number of its attacks.
* EyeBeams: Mausoleum Mom gains the ability to fire Brimstone beams from her eye.
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* FlunkyBoss: She'll summon groups of random enemies to battle Isaac
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* FlunkyBoss: She'll summon groups of random enemies to battle IsaacIsaac.
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* {{Gonk}}: See that leg up above? That's all the proof you need.
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* {{Gonk}}: See that leg up above? That's all the proof you need.Same deal as normal Mom.
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* {{Leitmotif}}: ''Thine Wrath...'' in the original, ''Matricide'' in ''Rebirth''.
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* {{Leitmotif}}: ''Thine Wrath...'' in Averted; unlike the original, ''Matricide'' base game's Mom, this fight recycles the normal boss theme. [[spoiler:Mom's Heart, on the other hand, gets a new one in ''Rebirth''.''Gloria Filio''.]]
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* UndergroundMonkey: The version of Mom you encounter in the Mausoleum.
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* TrickBoss: [[spoiler:Defeating her while holding the Knife Pieces throws you into a fight against Mom's Heart immediately afterwards.]]
* UndergroundMonkey: The version of Mom you encounter in the Mausoleum.
* UndergroundMonkey: The version of Mom you encounter in the Mausoleum.
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* SuspiciouslySimilarSubstitute: Gameplay-wise, it's more or less Pin with [[TookALevelInBadass five additional levels in badass]].
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* UndergroundMonkey: It's more or less an underwater Pin with [[TookALevelInBadass five additional levels in badass]].
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* BattleInTheRain: The battle against him is accompanied by a constant downpour that stops when he's defeated.
* DanceBattler: His movements in battle borrow heavily from the flamenco.
* MakingASplash: Rainmaker's attacks all have him levitating balls of water to hurl at the player.
* SomethingAboutARose: He carries a rose in his mouth.
* DanceBattler: His movements in battle borrow heavily from the flamenco.
* MakingASplash: Rainmaker's attacks all have him levitating balls of water to hurl at the player.
* SomethingAboutARose: He carries a rose in his mouth.
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* BossArenaIdiocy: The Tuff Twins start out covered in a rock shell that makes them impervious to attack and must be broken with explosions. Their boss room always happens to contain a number of Bomb Grimaces that provide free bombs to chuck at them, and occasionally a couple of TNT barrels as well.
* ShedArmorGainSpeed: They become faster as you blow up their stone armor.
* UndergroundMonkey: Stone-encrusted versions of Larry Jr.
* ShedArmorGainSpeed: They become faster as you blow up their stone armor.
* UndergroundMonkey: Stone-encrusted versions of Larry Jr.
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* MadBomber: His main modus operandi is to ride around on his minecart, chucking various bombs at you.
* MinecartMadness: Inverted. He's the one on the minecart, but you're still the one doing the dodging.
* ScrewThisImOuttaHere: Depleting his health causes his minecart to be destroyed, at which point Hornfel will run for the nearest door. This makes Hornfel the only boss that can be defeated non-lethally, but you do get a chance at a bomb-based item if you kill him before he escapes.
* MinecartMadness: Inverted. He's the one on the minecart, but you're still the one doing the dodging.
* ScrewThisImOuttaHere: Depleting his health causes his minecart to be destroyed, at which point Hornfel will run for the nearest door. This makes Hornfel the only boss that can be defeated non-lethally, but you do get a chance at a bomb-based item if you kill him before he escapes.
* BulletHell: Like a number of other bosses, The Siren can unleash a dense array of bullets in all directions. Her shots actually curve in the air, making them harder to dodge.
* EnthrallingSiren: Her singing can lure your familiars over to her side.
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* PowerParasite: Effectively copies the abilities of your familiars by charming them. Things can get very messy if she steals something like Dry Baby or Dead Cat.
* StrippedToTheBone: The Siren is rapidly reduced to an inert skeleton upon death. [[spoiler:Destroying her skull unlocks a trinket.]]
* StrippedToTheBone: The Siren is rapidly reduced to an inert skeleton upon death. [[spoiler:Destroying her skull unlocks a trinket.]]
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!Reap Creap
to:
!Reap CreapCreep
* AllYourPowersCombined: Reap Creep combines the abilities of all three varieties of Wall Creep in the vanilla game and turns them UpToEleven.
* BeamSpam: Its third phase can fire a spray of four sweeping Brimstone beams.
* GiantSpider: It's a giant Wall Creep around the size of Widow.
* AllYourPowersCombined: Reap Creep combines the abilities of all three varieties of Wall Creep in the vanilla game and turns them UpToEleven.
* BeamSpam: Its third phase can fire a spray of four sweeping Brimstone beams.
* GiantSpider: It's a giant Wall Creep around the size of Widow.
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* MookMaker: Spawns a lot of creeps to harass the player.
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* MookMaker: Spawns a lot of creeps to harass the player. \n It can also shake spiders loose from the ceiling.
* SequentialBoss: Has three phases, each imitating a different Wall Creep, all with different attacks.
* SequentialBoss: Has three phases, each imitating a different Wall Creep, all with different attacks.
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* MeaningfulName: It's a giant leech apparently made of driftwood.
to:
* MeaningfulName: It's Named after the biblical [[https://en.wikipedia.org/wiki/Wormwood_(Bible) Wormwood]], a giant leech apparently made star which will fall and turn a third of driftwood.Earth's waters bitter and deadly.
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!Reap Creap
* AllYourPowersCombined: Reap Creep combines the abilities of all three varieties of Wall Creep in the vanilla game and turns them UpToEleven.
* BeamSpam: One of its attacks fires a spray of four Brimstone beams.
* GiantSpider: It's a giant Wall Creep around the size of Widow.
* KingMook: Of the creeps.
* MookMaker: Spawns a lot of creeps to harass the player. It can also shake spiders loose from the ceiling.
* AllYourPowersCombined: Reap Creep combines the abilities of all three varieties of Wall Creep in the vanilla game and turns them UpToEleven.
* BeamSpam: One of its attacks fires a spray of four Brimstone beams.
* GiantSpider: It's a giant Wall Creep around the size of Widow.
* KingMook: Of the creeps.
* MookMaker: Spawns a lot of creeps to harass the player. It can also shake spiders loose from the ceiling.
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* AttackItsWeakPoint: Initially, it's the chain holding the two together; afterwards, the mask must be attacked from behind.
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!The Pile
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* BulletHell: Very mild compared to most examples in the game, but it shoots a ''lot'' of projectiles for a boss you can fight on the first floor.
* BallisticBone: It can launch sprays of bone projectiles.
* DemBones: A fully skeletal version of Polycephalus.
* DemBones: A fully skeletal version of Polycephalus.
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* BossArenaUrgency: It can punch holes in the floor with its tail. Given the way pits work in this game, this won't kill you, but it does make it more difficult to dodge Wormwood's attacks.
* DeadlyLunge: Gains a ''very'' fast one when it's at low health.
* MakingASplash: Its projectiles appear to be water, as opposed to the standard blood projectiles.
* MeaningfulName: It's a giant leech apparently made of driftwood.
* SuspiciouslySimilarSubstitute: Gameplay-wise, it's more or less Pin with [[TookALevelInBadass five additional levels in badass]].
* TurnsRed: It becomes much more aggressive and will start making holes in the ground at low health.
* DeadlyLunge: Gains a ''very'' fast one when it's at low health.
* MakingASplash: Its projectiles appear to be water, as opposed to the standard blood projectiles.
* MeaningfulName: It's a giant leech apparently made of driftwood.
* SuspiciouslySimilarSubstitute: Gameplay-wise, it's more or less Pin with [[TookALevelInBadass five additional levels in badass]].
* TurnsRed: It becomes much more aggressive and will start making holes in the ground at low health.
* AllYourPowersCombined: Reap Creep combines the abilities of all three varieties of Wall Creep in the vanilla game and turns them UpToEleven.
* BeamSpam: One of its attacks fires a spray of four Brimstone beams.
* GiantSpider: It's a giant Wall Creep around the size of Widow.
* BeamSpam: One of its attacks fires a spray of four Brimstone beams.
* GiantSpider: It's a giant Wall Creep around the size of Widow.
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* MookMaker: Spawns a lot of creeps to harass the player.
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* MookMaker: Spawns a lot of creeps to harass the player. \n It can also shake spiders loose from the ceiling.
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* GetBackHereBoss: Like always it pops up to attack and pulls away to hide.
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* GetBackHereBoss: Like always always, it pops up to attack and pulls away to hide.
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[[quoteright:192:http://static.tvtropes.org/pmwiki/pub/images/boss_the_heretic.png]]
----
* KaizoTrap: After it dies, the fire in its eye falls to the ground and erupts into a four-way burst, possibly damaging you if you're not paying attention.
* NonHumanUndead: It's an undead ghost. Try to wrap your head around that.
* OurGhostsAreDifferent: And apparently more undead.
* UngratefulBastard: It gets revived by cultists, and it thanks them by turning them into {{Mooks}} to send after you.
----
* KaizoTrap: After it dies, the fire in its eye falls to the ground and erupts into a four-way burst, possibly damaging you if you're not paying attention.
* NonHumanUndead: It's an undead ghost. Try to wrap your head around that.
* OurGhostsAreDifferent: And apparently more undead.
* UngratefulBastard: It gets revived by cultists, and it thanks them by turning them into {{Mooks}} to send after you.
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!The Pile
!Mausoleum Mom
to:
* CharmPerson: Can steal your familiars with her voice and turn them against you.
* {{Expy}}: Of, oddly enough, the Gorgun from VideoGame/EnterTheGungeon, having several similar attacks and a similar appearance.
!The Pile
!Mausoleum Mom
----
* {{Expy}}: Of, oddly enough, the Gorgun from VideoGame/EnterTheGungeon, having several similar attacks and a similar appearance.
!The Pile
!Mausoleum Mom
----
[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/400px_boss_the_witness.png]]
----
----
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* EvilOnlooker: Its boss portrait has the Witness looming over Isaac in this fashion.
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* EvilOnlooker: EvilOverlooker: Its boss portrait has the Witness looming over Isaac in this fashion.
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* TwoFaced: Half of it's face has rotted down to the skull.
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* MarathonBoss: Shockingly, [[AvertedTrope Averted]]; while the fight against it is still longer than a normal fight, it lacks the scaling damage resistance that the canon final bosses have, meaning that it's a relative GlassCannon.
* TakenForGranite: After you finally kill it, it hardens over into stone.
* TurnsRed: After you deplete its health bar once, its arms explode, and its head bursts out out of its body to keep attacking.
* TwoFaced: Half ofit's its face has rotted down to the skull.
* TakenForGranite: After you finally kill it, it hardens over into stone.
* TurnsRed: After you deplete its health bar once, its arms explode, and its head bursts out out of its body to keep attacking.
* TwoFaced: Half of
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* AntiFrustrationFeatures: Since they automatically use any cards and pills they pick up, picking up a red card would run the risk of that card being [[PressXToDie Suicide King]]. Thankfully, the developers realized this and made it so that Suicide King never spawns in a Jacob & Esau run.
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* UndergroundMonkey: The version of Mom you encounter in the Mausoleum.
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* BulletHell: As expected of a ''Binding of Isaac'' endboss, but The Witness takes this to a whole new level.
* EvilOnlooker: Its boss portrait has the Witness looming over Isaac in this fashion.
* FinalBoss: Of the Antibirth content.
* EvilOnlooker: Its boss portrait has the Witness looming over Isaac in this fashion.
* FinalBoss: Of the Antibirth content.
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A list of characters who appear in ''VideoGame/TheBindingOfIsaac Anitbirth''. Currently under construction, please contribute!
----
[[foldercontrol]]
!Plot-relevant characters
[[folder:Isaac]]
!!Isaac
[[quoteright:248:http://static.tvtropes.org/pmwiki/pub/images/isaacopening.png]]
A little boy who flees into the basement of his house to escape from a mother who wants to kill him, and must fight for his life against a never-ending assortment of demons and mutants. Beating the game in certain ways or collecting certain items unlocks variations of Isaac with their own unique attributes.
%%If you don't agree, please take it to the discussion page. It's pretty clear once you beat the game the first time that Isaac is just wearing accessories. WordOfGod also confirmed this is true.
For tropes related to Isaac and his alter-egos in gameplay, scroll down to the section on player characters. For tropes related to Isaac as the boss enemy of the Cathedral, scroll down to the section on major bosses.
----
* BreakTheCutie: The entire premise of the game is one for him.
* ChildrenForcedToKill: Isaac has to fight and kill plenty of enemies just to survive, up to and including his own religiously psychotic mother. [[spoiler:Or so it seems]].
* CreateYourOwnVillain: Well, antagonist. Isaac would never have been forced to kill his own mother if she hadn't snapped and tried to sacrifice him in the first place. [[spoiler:This gains some ''very'' interesting implications at the true ending of ''Rebirth'', where it's revealed that Isaac becomes a demon or the AntiChrist inside the Chest. Did Isaac have darkness inside him all along, or did he [[ThenLetMeBeEvil decide to become evil]] after all the horror that he went through?]]
* {{Crossdresser}}: A few between-level cutscenes show him wearing a dress or a wig, not to mention the fact that all female "player characters" are him crossdressing.
* DarkAndTroubledPast: The horrible memories of things that Isaac suffered through are relived in level loading screens. In one ending, the photograph montage of Isaac's past leaves a lot of interpretation as to what happened to his family, namely what happened to his father (who likely left, went missing, or died).
* DeadAllAlong: [[spoiler:After beating It Lives for the tenth time and unlocking Ending 10, Isaac comes across his corpse stuffed into a chest. At least one interpretation of this involves Isaac having been dead the whole time. The next three endings explore the events leading up to his death in reverse chronological order, first showing him willingly [[DrivenToSuicide locking himself in the chest]], then showing his self-loathing which led to this, and finally showing his [[DarkAndTroubledPast tragic backstory]] through a heartbreaking PhotoMontage. After beating Hush in ''Afterbirth'', if you end your run there, not going on to Cathedral or Sheol, you get Ending 17, which outright confirms it, as Mom opens the Chest to find Isaac's skeletal remains.]]
** Ending 20, the true ending to the game, reveals that [[spoiler:he has long since been DrivenToSuicide and that none of the game is even happening]].
* DrivenToSuicide: Isaac hangs himself upon finding Transcendence (a noose) in Ending 2. [[spoiler:This is PlayedForDrama in the final few endings: After we see that Isaac has been DeadAllAlong in the tenth ending, we are shown him willingly entering the chest himself in Endings 12 and 13, and the twentieth ending reveals that it was due to his self-loathing as he sees himself as a demon after his family breaks apart.]]
* DyingDream: [[spoiler:Ending 20 reveals that the whole game is this, including the thought of his mother attempting to kill him.]]
* EnemyWithout: [[spoiler:There are four variations of Isaac that serve as bosses: It Lives, the boss of Womb II confirmed to be Isaac as an embryo; normal Issac, the boss of Cathedral; Hush, the boss of the Blue Womb and a suffocating version of Isaac; and finally ???, boss of the Chest and Isaac after suffocating to death.]]
* FullFrontalAssault: Unless an item is picked up, Isaac is battling the monsters of the basement stark naked.
* HilariouslyAbusiveChildhood: Many of the level intermission vignettes have Isaac getting picked on by kids, being dressed in drag, getting shit as a birthday gift, [[ArsonMurderAndJaywalking realizing he has no toilet paper while he's on the toilet]], and the list goes on. And that's not even speaking of some of the items -- the Wooden Spoon gives you scars, implying Isaac was ''beaten'' with it by his mom, the Belt is [[DontMakeMeTakeMyBeltOff self-explanatory]], and many of the food items [[IAteWhat aren't exactly fit for human consumption]].
* ItsAllMyFault: The ending you get for beating the Chest seems to imply that [[spoiler:the cause of Isaac's self-loathing is because he blames himself for his father leaving. His mother seems to blame him as well]]. Ending 20 eventually reveals that [[spoiler:he does blame himself, and this is what ultimately causes him to be DrivenToSuicide]].
* KindheartedCatLover: Whenever the player gets a GameOver, Isaac usually states in the diary that he will give what he collected to his pet cat, Guppy.
* MadnessMantra: [[spoiler:BAD BAD BAD BAD I'M THE DEVIL...]]
* SanitySlippage: [[spoiler:Isaac is slowly going insane the longer he is in the chest, as shown by the final level and boss being amalgams of previous levels and bosses.]]
* ThenLetMeBeEvil: [[spoiler:It is strongly implied that at the ending of ''Rebirth'', Isaac becomes a demon or TheAntichrist in order to deal with all the horror he went through, up to and including his mother.]]
* TroubledFetalPosition: Isaac's signature pose, which all but cements the kid as TheWoobie.
* WalkingSpoiler: Due to the endings revealing more and more of what is actually going on between him and his family, it's only a given.
[[/folder]]
[[folder:Mom]]
!!Mom
[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/momopening.png]]
->Debut: ''The Binding of Isaac''
[[ExactlyWhatItSaysOnTheTin Isaac's mother.]] A devoutly religious woman who, in a fit of rage/insanity/fanaticism/[[WildMassGuessing whatever you think it is]], she tries to kill Isaac, forcing him to flee to the basement.
For tropes relating to Mom as a boss enemy, scroll down to the section on major bosses.
----
* {{Abusive Parent|s}}: Takes away all her son's stuff, locks him in his room, and then tries to ''kill him''. Convinced by God to do so or not, that's all the evidence you need. Due to the true ending revealing that [[spoiler:Turns out to be a possible subversion, depending on whether you see the between-level cutscenes are canon or not.]]
* TheBadGuyWins: [[spoiler:It's revealed that Isaac suffocated to death while inside the chest. She wanted Isaac to die because of an [[ThroughTheEyesOfMadness (alleged)]] order from God, do the math. However, subsequent endings reveal that Isaac locked ''himself'' in the Chest ''before'' the events of the game, and ''Afterbirth+'' reveals that she was never intending to kill him, and that Isaac saw himself as a demon and the cause of his family breaking apart, making this a cruel subversion]]
* BigBad: [[spoiler:Ultimately subverted.]]
* TheExtremistWasRight: She's a religious fanatic that appears to think that she's on a mission from God, which is clearly not the case. [[spoiler:At least until the canonical end of ''Rebirth'', strongly implying that Isaac either was or now is a demon. If you subscribe to the "just batshit insane" theory, then she's RightForTheWrongReasons.]]
* TheFundamentalist: She's heavily Christian, and her hearing the voice of God is what kicks off the plot.
* HiddenDepths:
** [[spoiler:Ending 13 [[note]]14 in ''Rebirth''[[/note]] reveals that she used to be completely sane, and the caring and loving mother of a fully-functional family. However, as the family fell apart, so did her sanity.]]
** [[spoiler:Endings 15 and 17 suggest that in the end, she might be at least ''somewhat'' concerned about her son's well-being.]]
* KnifeNut: She's holding her knife in almost every cutscene she appears in, and you can unlock said knife as a usable weapon in-game.
* MaybeMagicMaybeMundane: Is she really hearing the voice of God, or is she just batshit crazy? The best we get from [=McMillen=] is him [[https://upvoted.com/2015/10/03/edmund-mcmillen-binding-of-isaac-profile/ stating]]:
--> “It was never implied that [Mom's] insane. And if you’re going by the Bible and you believe all the stories, [[BeliefMakesYouStupid then why wouldn’t you think that it’s possible now for that stuff to happen?]]”
* NoNameGiven: Unlike Isaac, even her first name is unknown.
* OffingTheOffspring: Her ultimate goal.
* OneBadMother: Bonus points for actually being the main character's mother.
[[/folder]]
!New Playable Characters
[[folder:Jacob and Esau]]
->Debut: ''Antibirth''
A pair of brothers that debuted in ''Antibirth'' and have to unlocked to play as them. Both brothers are controlled simultaneously, but they have separate items, trinkets, and health bars with Jacob having more health but Esau having more damage at the start. If Jacob or Esau dies, the run is over. They are named after the twin sons of Isaac.
----
* AlwaysIdenticalTwins: Played with. Jacob looks like normal person while Esau has dark red skin but both have the same hair style.
* AmazingTechnicolorPopulation: Esau is a dark red because the Biblical Esau was described as "red all over" when he was born.
* DamnYouMuscleMemory: The twins automatically use any pick-ups as Esau's "use item" button is "Q", the standard use pick-up item button.
* TheDividual: Both Jacob and Esau are controlled by the player and if one dies both die.
* MechanicallyUnusualFighter: The player now has to watch for two characters while making sure they both get stat boosts and learning how their item buttons work.
* SingleMindedTwins: Downplayed. Despite both brothers moving in unison both can/have to use separate items.
* TearsOfBlood: Esau has these standard.
[[/folder]]
[[folder:Bethany]]
->Debut: ''Antibirth''
Also known as "Beth", she's an unlockable character in ''Antibirth'' by having any combination of 12 soul, black, or immortal hearts during a run with any character. She starts with the Book Of Virtues after defeating Isaac in The Cathedral and can summon a familiar to aid in combat and block tears. She also adds Soul Hearts, Black Hearts, and immortal hearts that she picks to a counter instead of her health bar. While this leaves her with less health the counter can be used as charge for the Book Of Virtues or other activated collectibles. Each heart picked up increases the counter by 2. She has a chance of dropping a Soul Heart on room clear, separate from the regular room clear drop. Bethany is named after the village of Bethany, the home of Lazarus.
----
* AerithAndBob: The only playable character with a name taken from a town instead of a character.
* GirlishPigtails: She sports a pair tied up with blue ribbons.
* MechanicallyUnusualFighter: As stated above, Bethany uses heart pick-ups to increase the counter to recharge space bar items. This lets her use space bar items more often at the cost of being more dependent on health increasing items and pick-ups. Any item that remove all of her hearts will kill her; for example Abaddon remove all of her red hearts and add the Black Hearts to the counter.
* NonstandardCharacterDesign: Bethany is the only playable character with a pair of eyelashes.
[[/folder]]
!Monsters
!Bosses
[[folder:Normal Levels]]
!Baby Plum
* KingMook: Of various flies, most notably the bloat flies.
* [[MascotMook Mascot Monster]]: Baby Plum is the mascot of the mod.
!The Pile
* BackFromTheDead: It's an undead version of Polycephalus and The Stain.
* GetBackHereBoss: Like always it pops up to attack and pulls away to hide.
!Reap Creap
* KingMook: Of the creeps.
* MookMaker: Spawns a lot of creeps to harass the player.
[[/folder]]
[[folder:Downpour]]
!Wormwood
!Beelzeblub
!The Rainmaker
!!The Haunt
[[quoteright:156:http://static.tvtropes.org/pmwiki/pub/images/thehaunt.png]]
-> Debut: ''Rebirth''
* BedsheetGhost: What's underneath its sheet is quite a bit scarier, however.
* FlyingFace: That rips itself open to reveal a [[SkullForAHead skull]] when its minions are dealt with.
* FlunkyBoss: He is surrounded by three Lil Haunts which attack before he does. First one attacks, then the other two do. He's invulnerable until they're dead and he moves to the top of the room. His black Champion version spawns spiders instead of shooting Brimstone.
* FrickinLaserBeams: In his second phase, he'll fire Brimstone downwards as he strafes along the top of the screen.
* HeelFaceTurn: The Lil' Haunt item gives you a friendly Lil' Haunt who chases your enemies.
* {{Intangibility}}: Until his minions are dead.
* KingMook: To the Lil' Haunts.
* NoFairCheating: He normally paces from side to side along the top edge of the screen, shooting downwards. If you try to move to the top where he can't shoot you, he'll immediately charge at you to cause damage. Which ''hurts like '''crazy.''''' Of course, if you're fast enough you can dodge it and still hurt the boss before it loops back.
* OurGhostsAreDifferent: This one has a skeleton. Which he'll gladly show to you.
* ThePawnsGoFirst: Sends his Lil' Haunt minions to attack you while he himself remains intangible. When they go down, then he fights you.
[[/folder]]
[[folder:Mines]]
!Tuff Twins
!Great Gideon
!Hornfel
!Reap Creap
* KingMook: Of the creeps.
* MookMaker: Spawns a lot of creeps to harass the player.
[[/folder]]
[[folder:Mausoleum]]
!The Heretic
!The Visage
!The Siren
!The Pile
!Mausoleum Mom
----
* AttackOfTheFiftyFootWhatever: Her boss fight.
* AxCrazy: Her goal is to kill her own son, and she doesn't sound too upset about it during the fight, what with the laughing and all.
* BodyHorror: The way Mom's body parts move throughout the fight (such as both eyes appearing on opposite sides of the room while she tries to stomp on you) suggest an ability to contort herself in rather...impossible ways.
* BossBanter: ''ISAAAAAC!''
* DeathByIrony: [[spoiler:Crushed by her own bible!]]
* DiscOneFinalBoss: Demoted to this on your second playthrough and beyond.
* EvilIsVisceral: Likely the reason her body parts are detailed and somewhat deformed.
* EvilLaugh: She lets out one every time she successfully damages Isaac.
* TheFaceless: Her entire face is never shown at any point in the main game (the intro and epilogue don't count, as they're Isaac's cartoon drawings). This is [[SubvertedTrope subverted]] after you beat the Chest in ''WOTL'' or ''Rebirth'', but only briefly. In photographs, to be precise.
* FanDisservice: When Isaac uses the Mom's Bra item, a picture of his mother's shirtless torso flashes on the screen. A ''very'' unflattering picture of his mother's less-than-fit shirtless torso.
* FatBastard: As shown by her giant leg and the picture that shows up when using Mom's Bra.
* FinalBoss: In your first playthrough. She's nowhere near the TrueFinalBoss, though.
* FlunkyBoss: She'll summon groups of random enemies to battle Isaac
* GameplayAndStoryIntegration: Using [[spoiler:the Bible]] instantly defeats her in her boss fight.
* GiantFootOfStomping: Her main method of direct attack.
* {{Gonk}}: See that leg up above? That's all the proof you need.
* GrossUpCloseUp: One of her leg in the boss portrait, and one of her body in the picture that appears when using Mom's Bra.
* HumanoidAbomination: Most of what she does in-game and in a few cutscenes blatantly disregards normal body movements if not physics. She can step on her own eye, generally alter size, and [[spoiler:her arm can fit in a chest inside her heart inside her womb]].
* {{Leitmotif}}: ''Thine Wrath...'' in the original, ''Matricide'' in ''Rebirth''.
* MookMaker: And these mooks are a lot harder than last time!
* MotherOfAThousandYoung: If you go by the theory that the majority of the enemies are her former children.
* SayMyName: ISAAC!
* SkippableBoss: Provided you have [[spoiler:the Bible]] on you by the time you reach her, and it's fully charged.
* TacticalSuicideBoss: It's not actually mandatory, but making her stomp herself is possible, and deals lots of damage.
* YourSizeMayVary: Just how big is she? In the cutscenes, she's a normal-sized human being, but her underwear is the right size to be worn by a child visibly smaller than her, in the boss fight her leg is the length of the screen, and then [[spoiler:her womb is big enough to have two entire levels in it, with her heart being larger than Isaac]].
[[/folder]]
[[folder:Corpse]]
!The Scourge
!Rotgut
!Chimera
!The Witness
* BackFromTheDead: It's the rotting corpse of Mama Gurdy, grey from time.
* TwoFaced: Half of it's face has rotted down to the skull.
[[/folder]]
----
[[foldercontrol]]
!Plot-relevant characters
[[folder:Isaac]]
!!Isaac
[[quoteright:248:http://static.tvtropes.org/pmwiki/pub/images/isaacopening.png]]
A little boy who flees into the basement of his house to escape from a mother who wants to kill him, and must fight for his life against a never-ending assortment of demons and mutants. Beating the game in certain ways or collecting certain items unlocks variations of Isaac with their own unique attributes.
%%If you don't agree, please take it to the discussion page. It's pretty clear once you beat the game the first time that Isaac is just wearing accessories. WordOfGod also confirmed this is true.
For tropes related to Isaac and his alter-egos in gameplay, scroll down to the section on player characters. For tropes related to Isaac as the boss enemy of the Cathedral, scroll down to the section on major bosses.
----
* BreakTheCutie: The entire premise of the game is one for him.
* ChildrenForcedToKill: Isaac has to fight and kill plenty of enemies just to survive, up to and including his own religiously psychotic mother. [[spoiler:Or so it seems]].
* CreateYourOwnVillain: Well, antagonist. Isaac would never have been forced to kill his own mother if she hadn't snapped and tried to sacrifice him in the first place. [[spoiler:This gains some ''very'' interesting implications at the true ending of ''Rebirth'', where it's revealed that Isaac becomes a demon or the AntiChrist inside the Chest. Did Isaac have darkness inside him all along, or did he [[ThenLetMeBeEvil decide to become evil]] after all the horror that he went through?]]
* {{Crossdresser}}: A few between-level cutscenes show him wearing a dress or a wig, not to mention the fact that all female "player characters" are him crossdressing.
* DarkAndTroubledPast: The horrible memories of things that Isaac suffered through are relived in level loading screens. In one ending, the photograph montage of Isaac's past leaves a lot of interpretation as to what happened to his family, namely what happened to his father (who likely left, went missing, or died).
* DeadAllAlong: [[spoiler:After beating It Lives for the tenth time and unlocking Ending 10, Isaac comes across his corpse stuffed into a chest. At least one interpretation of this involves Isaac having been dead the whole time. The next three endings explore the events leading up to his death in reverse chronological order, first showing him willingly [[DrivenToSuicide locking himself in the chest]], then showing his self-loathing which led to this, and finally showing his [[DarkAndTroubledPast tragic backstory]] through a heartbreaking PhotoMontage. After beating Hush in ''Afterbirth'', if you end your run there, not going on to Cathedral or Sheol, you get Ending 17, which outright confirms it, as Mom opens the Chest to find Isaac's skeletal remains.]]
** Ending 20, the true ending to the game, reveals that [[spoiler:he has long since been DrivenToSuicide and that none of the game is even happening]].
* DrivenToSuicide: Isaac hangs himself upon finding Transcendence (a noose) in Ending 2. [[spoiler:This is PlayedForDrama in the final few endings: After we see that Isaac has been DeadAllAlong in the tenth ending, we are shown him willingly entering the chest himself in Endings 12 and 13, and the twentieth ending reveals that it was due to his self-loathing as he sees himself as a demon after his family breaks apart.]]
* DyingDream: [[spoiler:Ending 20 reveals that the whole game is this, including the thought of his mother attempting to kill him.]]
* EnemyWithout: [[spoiler:There are four variations of Isaac that serve as bosses: It Lives, the boss of Womb II confirmed to be Isaac as an embryo; normal Issac, the boss of Cathedral; Hush, the boss of the Blue Womb and a suffocating version of Isaac; and finally ???, boss of the Chest and Isaac after suffocating to death.]]
* FullFrontalAssault: Unless an item is picked up, Isaac is battling the monsters of the basement stark naked.
* HilariouslyAbusiveChildhood: Many of the level intermission vignettes have Isaac getting picked on by kids, being dressed in drag, getting shit as a birthday gift, [[ArsonMurderAndJaywalking realizing he has no toilet paper while he's on the toilet]], and the list goes on. And that's not even speaking of some of the items -- the Wooden Spoon gives you scars, implying Isaac was ''beaten'' with it by his mom, the Belt is [[DontMakeMeTakeMyBeltOff self-explanatory]], and many of the food items [[IAteWhat aren't exactly fit for human consumption]].
* ItsAllMyFault: The ending you get for beating the Chest seems to imply that [[spoiler:the cause of Isaac's self-loathing is because he blames himself for his father leaving. His mother seems to blame him as well]]. Ending 20 eventually reveals that [[spoiler:he does blame himself, and this is what ultimately causes him to be DrivenToSuicide]].
* KindheartedCatLover: Whenever the player gets a GameOver, Isaac usually states in the diary that he will give what he collected to his pet cat, Guppy.
* MadnessMantra: [[spoiler:BAD BAD BAD BAD I'M THE DEVIL...]]
* SanitySlippage: [[spoiler:Isaac is slowly going insane the longer he is in the chest, as shown by the final level and boss being amalgams of previous levels and bosses.]]
* ThenLetMeBeEvil: [[spoiler:It is strongly implied that at the ending of ''Rebirth'', Isaac becomes a demon or TheAntichrist in order to deal with all the horror he went through, up to and including his mother.]]
* TroubledFetalPosition: Isaac's signature pose, which all but cements the kid as TheWoobie.
* WalkingSpoiler: Due to the endings revealing more and more of what is actually going on between him and his family, it's only a given.
[[/folder]]
[[folder:Mom]]
!!Mom
[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/momopening.png]]
->Debut: ''The Binding of Isaac''
[[ExactlyWhatItSaysOnTheTin Isaac's mother.]] A devoutly religious woman who, in a fit of rage/insanity/fanaticism/[[WildMassGuessing whatever you think it is]], she tries to kill Isaac, forcing him to flee to the basement.
For tropes relating to Mom as a boss enemy, scroll down to the section on major bosses.
----
* {{Abusive Parent|s}}: Takes away all her son's stuff, locks him in his room, and then tries to ''kill him''. Convinced by God to do so or not, that's all the evidence you need. Due to the true ending revealing that [[spoiler:Turns out to be a possible subversion, depending on whether you see the between-level cutscenes are canon or not.]]
* TheBadGuyWins: [[spoiler:It's revealed that Isaac suffocated to death while inside the chest. She wanted Isaac to die because of an [[ThroughTheEyesOfMadness (alleged)]] order from God, do the math. However, subsequent endings reveal that Isaac locked ''himself'' in the Chest ''before'' the events of the game, and ''Afterbirth+'' reveals that she was never intending to kill him, and that Isaac saw himself as a demon and the cause of his family breaking apart, making this a cruel subversion]]
* BigBad: [[spoiler:Ultimately subverted.]]
* TheExtremistWasRight: She's a religious fanatic that appears to think that she's on a mission from God, which is clearly not the case. [[spoiler:At least until the canonical end of ''Rebirth'', strongly implying that Isaac either was or now is a demon. If you subscribe to the "just batshit insane" theory, then she's RightForTheWrongReasons.]]
* TheFundamentalist: She's heavily Christian, and her hearing the voice of God is what kicks off the plot.
* HiddenDepths:
** [[spoiler:Ending 13 [[note]]14 in ''Rebirth''[[/note]] reveals that she used to be completely sane, and the caring and loving mother of a fully-functional family. However, as the family fell apart, so did her sanity.]]
** [[spoiler:Endings 15 and 17 suggest that in the end, she might be at least ''somewhat'' concerned about her son's well-being.]]
* KnifeNut: She's holding her knife in almost every cutscene she appears in, and you can unlock said knife as a usable weapon in-game.
* MaybeMagicMaybeMundane: Is she really hearing the voice of God, or is she just batshit crazy? The best we get from [=McMillen=] is him [[https://upvoted.com/2015/10/03/edmund-mcmillen-binding-of-isaac-profile/ stating]]:
--> “It was never implied that [Mom's] insane. And if you’re going by the Bible and you believe all the stories, [[BeliefMakesYouStupid then why wouldn’t you think that it’s possible now for that stuff to happen?]]”
* NoNameGiven: Unlike Isaac, even her first name is unknown.
* OffingTheOffspring: Her ultimate goal.
* OneBadMother: Bonus points for actually being the main character's mother.
[[/folder]]
!New Playable Characters
[[folder:Jacob and Esau]]
->Debut: ''Antibirth''
A pair of brothers that debuted in ''Antibirth'' and have to unlocked to play as them. Both brothers are controlled simultaneously, but they have separate items, trinkets, and health bars with Jacob having more health but Esau having more damage at the start. If Jacob or Esau dies, the run is over. They are named after the twin sons of Isaac.
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* AlwaysIdenticalTwins: Played with. Jacob looks like normal person while Esau has dark red skin but both have the same hair style.
* AmazingTechnicolorPopulation: Esau is a dark red because the Biblical Esau was described as "red all over" when he was born.
* DamnYouMuscleMemory: The twins automatically use any pick-ups as Esau's "use item" button is "Q", the standard use pick-up item button.
* TheDividual: Both Jacob and Esau are controlled by the player and if one dies both die.
* MechanicallyUnusualFighter: The player now has to watch for two characters while making sure they both get stat boosts and learning how their item buttons work.
* SingleMindedTwins: Downplayed. Despite both brothers moving in unison both can/have to use separate items.
* TearsOfBlood: Esau has these standard.
[[/folder]]
[[folder:Bethany]]
->Debut: ''Antibirth''
Also known as "Beth", she's an unlockable character in ''Antibirth'' by having any combination of 12 soul, black, or immortal hearts during a run with any character. She starts with the Book Of Virtues after defeating Isaac in The Cathedral and can summon a familiar to aid in combat and block tears. She also adds Soul Hearts, Black Hearts, and immortal hearts that she picks to a counter instead of her health bar. While this leaves her with less health the counter can be used as charge for the Book Of Virtues or other activated collectibles. Each heart picked up increases the counter by 2. She has a chance of dropping a Soul Heart on room clear, separate from the regular room clear drop. Bethany is named after the village of Bethany, the home of Lazarus.
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* AerithAndBob: The only playable character with a name taken from a town instead of a character.
* GirlishPigtails: She sports a pair tied up with blue ribbons.
* MechanicallyUnusualFighter: As stated above, Bethany uses heart pick-ups to increase the counter to recharge space bar items. This lets her use space bar items more often at the cost of being more dependent on health increasing items and pick-ups. Any item that remove all of her hearts will kill her; for example Abaddon remove all of her red hearts and add the Black Hearts to the counter.
* NonstandardCharacterDesign: Bethany is the only playable character with a pair of eyelashes.
[[/folder]]
!Monsters
!Bosses
[[folder:Normal Levels]]
!Baby Plum
* KingMook: Of various flies, most notably the bloat flies.
* [[MascotMook Mascot Monster]]: Baby Plum is the mascot of the mod.
!The Pile
* BackFromTheDead: It's an undead version of Polycephalus and The Stain.
* GetBackHereBoss: Like always it pops up to attack and pulls away to hide.
!Reap Creap
* KingMook: Of the creeps.
* MookMaker: Spawns a lot of creeps to harass the player.
[[/folder]]
[[folder:Downpour]]
!Wormwood
!Beelzeblub
!The Rainmaker
!!The Haunt
[[quoteright:156:http://static.tvtropes.org/pmwiki/pub/images/thehaunt.png]]
-> Debut: ''Rebirth''
* BedsheetGhost: What's underneath its sheet is quite a bit scarier, however.
* FlyingFace: That rips itself open to reveal a [[SkullForAHead skull]] when its minions are dealt with.
* FlunkyBoss: He is surrounded by three Lil Haunts which attack before he does. First one attacks, then the other two do. He's invulnerable until they're dead and he moves to the top of the room. His black Champion version spawns spiders instead of shooting Brimstone.
* FrickinLaserBeams: In his second phase, he'll fire Brimstone downwards as he strafes along the top of the screen.
* HeelFaceTurn: The Lil' Haunt item gives you a friendly Lil' Haunt who chases your enemies.
* {{Intangibility}}: Until his minions are dead.
* KingMook: To the Lil' Haunts.
* NoFairCheating: He normally paces from side to side along the top edge of the screen, shooting downwards. If you try to move to the top where he can't shoot you, he'll immediately charge at you to cause damage. Which ''hurts like '''crazy.''''' Of course, if you're fast enough you can dodge it and still hurt the boss before it loops back.
* OurGhostsAreDifferent: This one has a skeleton. Which he'll gladly show to you.
* ThePawnsGoFirst: Sends his Lil' Haunt minions to attack you while he himself remains intangible. When they go down, then he fights you.
[[/folder]]
[[folder:Mines]]
!Tuff Twins
!Great Gideon
!Hornfel
!Reap Creap
* KingMook: Of the creeps.
* MookMaker: Spawns a lot of creeps to harass the player.
[[/folder]]
[[folder:Mausoleum]]
!The Heretic
!The Visage
!The Siren
!The Pile
!Mausoleum Mom
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* AttackOfTheFiftyFootWhatever: Her boss fight.
* AxCrazy: Her goal is to kill her own son, and she doesn't sound too upset about it during the fight, what with the laughing and all.
* BodyHorror: The way Mom's body parts move throughout the fight (such as both eyes appearing on opposite sides of the room while she tries to stomp on you) suggest an ability to contort herself in rather...impossible ways.
* BossBanter: ''ISAAAAAC!''
* DeathByIrony: [[spoiler:Crushed by her own bible!]]
* DiscOneFinalBoss: Demoted to this on your second playthrough and beyond.
* EvilIsVisceral: Likely the reason her body parts are detailed and somewhat deformed.
* EvilLaugh: She lets out one every time she successfully damages Isaac.
* TheFaceless: Her entire face is never shown at any point in the main game (the intro and epilogue don't count, as they're Isaac's cartoon drawings). This is [[SubvertedTrope subverted]] after you beat the Chest in ''WOTL'' or ''Rebirth'', but only briefly. In photographs, to be precise.
* FanDisservice: When Isaac uses the Mom's Bra item, a picture of his mother's shirtless torso flashes on the screen. A ''very'' unflattering picture of his mother's less-than-fit shirtless torso.
* FatBastard: As shown by her giant leg and the picture that shows up when using Mom's Bra.
* FinalBoss: In your first playthrough. She's nowhere near the TrueFinalBoss, though.
* FlunkyBoss: She'll summon groups of random enemies to battle Isaac
* GameplayAndStoryIntegration: Using [[spoiler:the Bible]] instantly defeats her in her boss fight.
* GiantFootOfStomping: Her main method of direct attack.
* {{Gonk}}: See that leg up above? That's all the proof you need.
* GrossUpCloseUp: One of her leg in the boss portrait, and one of her body in the picture that appears when using Mom's Bra.
* HumanoidAbomination: Most of what she does in-game and in a few cutscenes blatantly disregards normal body movements if not physics. She can step on her own eye, generally alter size, and [[spoiler:her arm can fit in a chest inside her heart inside her womb]].
* {{Leitmotif}}: ''Thine Wrath...'' in the original, ''Matricide'' in ''Rebirth''.
* MookMaker: And these mooks are a lot harder than last time!
* MotherOfAThousandYoung: If you go by the theory that the majority of the enemies are her former children.
* SayMyName: ISAAC!
* SkippableBoss: Provided you have [[spoiler:the Bible]] on you by the time you reach her, and it's fully charged.
* TacticalSuicideBoss: It's not actually mandatory, but making her stomp herself is possible, and deals lots of damage.
* YourSizeMayVary: Just how big is she? In the cutscenes, she's a normal-sized human being, but her underwear is the right size to be worn by a child visibly smaller than her, in the boss fight her leg is the length of the screen, and then [[spoiler:her womb is big enough to have two entire levels in it, with her heart being larger than Isaac]].
[[/folder]]
[[folder:Corpse]]
!The Scourge
!Rotgut
!Chimera
!The Witness
* BackFromTheDead: It's the rotting corpse of Mama Gurdy, grey from time.
* TwoFaced: Half of it's face has rotted down to the skull.
[[/folder]]
