Necropolis

(chapter 3)

Stage ID
8

Floor ID
5a, 6a

Unlock Method
Beat all The Depths bosses (not restricted to beating bosses in The Depths)

Necropolis is the alternative chapter of The Depths. It is a dark environment infested with insects. Unlike The Depths, Necropolis must be unlocked for it to appear.

Necropolis is unlocked by defeating every boss from The Depths at least once.

The boss of Necropolis II is always Mom.

Monsters

Entity	ID	Description
Pooter	14.0	Slow-moving fly that occasionally fires single blood shots at Isaac. Does not deal touch damage.
I.Blob	15.2	Randomly wanders around the room, firing 8 shots in all directions.
Attack Fly	18.0	Red fly that follows Isaac and deals touch damage.
Hive	22.0	Walks around the room, avoiding Isaac while spawning Attack Flies. Spawns a large number of flies upon death, which can be Flies, Attack Flies or Pooters.
Globin	24.0	Chases Isaac, dealing a full heart of contact damage. Upon taking enough damage, it collapses into a pile of goo, which can be killed. Will regenerate after a short period of time if not killed quickly.
Gazing Globin	24.1	Quickly chases Isaac, dealing a full heart of contact damage. Upon taking enough damage, it collapses into a pile of goo, which will slide away from Isaac and can be killed. Will regenerate after a short period of time if not killed quickly.
Boom Fly	25.0	Flies around the room diagonally, dealing touch damage and exploding upon death.
Red Boom Fly	25.1	Flies around the room diagonally, dealing touch damage and releasing 6 blood shots in all directions upon death.
Maw	26.0	Slowly floats towards Isaac, firing blood shots at him when he is in their range.
Psychic Maw	26.2	Slowly floats towards Isaac, firing homing shots at him when he is in their range. Spawns with an Eternal Fly orbiting around it.
Host	27.0	Stationary enemy that is normally invulnerable. Raises its head up when Isaac gets close, revealing a fleshy stem that can be damaged. Upon raising its head, it will fire 3 blood shots in a spread and lower its head again.
Red Host	27.1	Stationary enemy that can be damaged even when its head is lowered. Fire 5 spread blood shots when it raises its head.
Boil	30.0	Stationary enemy that decreases in size when hit, but regenerates to its full size until fully destroyed. Fires multiple short-ranged blood projectiles in random directions when fully swollen.
Gut	30.1	Stationary enemy that decreases in size when hit, but regenerates to its full size until fully destroyed. Fires Ipecac shots in random directions when fully swollen.
Sack	30.2	Stationary enemy that decreases in size when hit, but regenerates to its full size until fully destroyed. Occasionally spawns Spiders when fully swollen.
Brain	32.0	Slowly crawls around the room, leaving a trail of Red Creep.
Leaper	34.0	Hops around the room, doing touch damage. Occasionally jumps high into the air, dropping down onto Isaac's position while firing 4 blood shots in the cardinal directions.
Mr. Maw	35.0	Walks towards Isaac and attacks by launching its head towards him. Turns into a Maw or Gusher upon death depending on the killed body segment. Occasionally separates at will.
Baby	38.0	Slowly floats towards Isaac and fires a blood shot at him. Occasionally teleports and reappears elsewhere.
Angelic Baby	38.1.0	Slowly floats towards Isaac and fires three spread shots. Occasionally teleports and reappears elsewhere.
Vis	39.0	Randomly wanders around the room. Pauses to charge and fire a Brimstone laser when Isaac gets in its line of sight.
Double Vis	39.1	Randomly wanders around the room. Pauses to charge and fire a Brimstone laser which fires from both sides when Isaac gets in its line of sight.
Chubber	39.2	Randomly wanders around the room. Pauses to fire a Charger that deals one heart of damage when Isaac gets in its line of sight. The Charger is invulnerable, blocks Isaac's tears, has limited range, and flies back to the Chubber.
Knight	41.0	Moves erratically around the room and charges towards Isaac when in line of sight. Can only be damaged from behind.
Selfless Knight	41.1	Moves erratically around the room and charges towards Isaac very quickly when in line of sight. Can only be damaged from behind.
Stone Grimace	42.0	Stationary and invulnerable monster that occasionally fires a blood shot at Isaac. Stops firing when room is cleared.
Vomit Grimace	42.1	Stationary and invulnerable monster that occasionally fires an Ipecac shot at Isaac. Stops firing when room is cleared.
Slide	44.1	Quickly slides towards Isaac when he gets in its line of sight, then moves slowly back to its original position. Cannot be destroyed.
Flaming Hopper	54.0	Quickly hops around the room, doing touch damage. Covers a larger distance than the regular Hopper.
Kamikaze Leech	55.1	Quickly charges towards Isaac when he gets in its line of sight. Explodes upon death.
Mama Guts	57.1	Slowly moves around the room, occasionally hopping and firing 8 large blood shots in all directions. Splits into 2 Guts upon death.
Sucker	61.0	Flies slowly towards Isaac, exploding into 4 shots in the cardinal directions upon death.
Spit	61.1	Flies slowly towards Isaac, firing an Ipecac shot towards Isaac upon death.
Embryo	77.0	Aimlessly hops around the room, dealing contact damage.
Spider	85.0	Erratically moves towards Isaac and deals touch damage.
Keeper	86.0	Hops around the room, firing 2 blood shots in a V formation at Isaac. Upon damaging Isaac, Isaac drops 2 coins on the ground but loses 3.
Gurgle	87.0	Walks towards Isaac, firing Ipecac shots at him. Can turn into a Splasher upon death.
Walking Boil	88.0	Does not shrink or regenerate. Walks around aimlessly and fires multiple short-ranged blood projectiles in random directions.
Walking Gut	88.1	Does not shrink or regenerate. Walks around aimlessly and fires Ipecac shots in random directions.
Walking Sack	88.2	Does not shrink or regenerate. Walks around aimlessly and occasionally spawns Spiders.
Buttlicker	89.0	Can start Attached to other Buttlickers and erratically moves around the room, similar to Larry Jr..
Hanger	90.0	Floats around the room, firing 3 spread blood shots at Isaac. Upon damaging Isaac, Isaac drops 2 coins on the ground but loses 3. Spawns with an Eternal Fly circling around it.
Swarmer	91.0	Slowly floats around the room, spawning several Attack Flies. Spawns Pooters upon taking damage. Spawns a Boom Fly upon death.
Mask + Heart	92.0	The Mask is invulnerable and moves around erratically, charging at Isaac when he lines up with it. The Heart avoids Isaac and fires 4 blood shots in the cardinal directions when Isaac gets near. Killing the Heart will automatically kill the Mask.
Big Spider	94.0	Erratically moves towards Isaac and deals touch damage. Splits into two Spiders upon death.
Mobile Host	204.0	Acts like the Host, but follows Isaac and deals contact damage.
Nest	205.0	Walks around the room, avoiding Isaac while spawning Spiders. Spawns a Big Spider or a Trite upon death.
Baby Long Legs	206.0	Runs away from Isaac and frequently spawns Spiders.
Fat Sack	209.0	Slowly walks towards Isaac. Occasionally leaps off-screen and attempts to land on Isaac, leaving a puddle of Red Creep and shooting 6 blood shots in all directions where it lands. Has a chance to turn into a Blubber upon death.
Blubber	210.0	Walks around aimlessly and randomly spews a cluster of blood shots in all directions. Has a chance to turn into a Half Sack when killed.
Pale Fatty	210.1	Slowly walks towards Isaac. Occasionally farts and shoots 6 blood shots in all directions. Has a chance to turn into a Blubber upon death.
Half Sack	211.0	Wanders around aimlessly and leaves a trail of Red Creep.
Death's Head	212.0	Invulnerable enemy that moves diagonally around the room, dealing contact damage. Dies when the room is cleared.
Mom's Hand	213.0	Falls from the ceiling. If it lands on Isaac, it deals damage and teleports the player back to the spawn room of the floor. Entering a room containing Mom's Hand will warn the player with Mom's laugh.
Dip	217.0	Slowly dashes in random directions, dealing contact damage.
Wizoob	219.0	Disappears, then appears near Isaac and spits a cluster of spectral tears at him.
Squirt	220.0	Dashes towards the player and deals contact damage. Spawns 2 Dips upon death.
Dinga	223.0	Slowly moves around the room, occasionally hopping to spawn Dips or fire 8 Brown shots in all directions. Splits 2 Squirts upon death.
Rotty	226.1	Slowly walks towards Isaac, leaving short-lasting Red Creep behind itself. Spawns a Bony or two Attack Flies upon death.
Bony	227.0	Wanders around the room and throws a bone at Isaac when he is in sight.
Tumor	229.0	Moves around the room diagonally, occasionally firing 6 blood shots in all directions. Fires more often upon getting damaged.
Nerve Ending	231.0	Static enemy which acts as a meat shield.
One Tooth	234.0	Follows Isaac and periodically dashes towards him when it gets close. Deals contact damage.
Gaping Maw	235.0	Stationary and invulnerable monster that sucks Isaac towards it, along with Isaac's tears and enemy projectiles.
Gurglings	237.1
Splasher	238.0	Walks aimlessly around the room, firing Ipecac shots in random directions.
Grub	239.0	Erratically moves around the room like Larry Jr. and charges at Isaac when he gets within its line of sight. Spawns Maggots, Chargers, or Spitties upon death, one for each of its segments.
Wall Creep	240.0	Crawls along walls to try to line up with Isaac and shoots three blood shots in a line.
Rage Creep	241.0	Slowly crawls along walls to try to line up with Isaac and shoots a Brimstone laser.
Blind Creep	242.0	Randomly crawls along walls and shoots three spread blood shots.
Ragling	246.0	Quickly leaps towards Isaac and deals touch damage. Randomly shoots two purple shots that orbit around it.
Flesh Mobile Host	247.0	Acts like the Red Host, but follows Isaac and deals contact damage.
Psychic Horf	248.0	Stationary enemy that fires a homing shot at Isaac when he gets in range of them.
Begotten	251.0	Starts attached to the wall or an obstacle. After a while, it detaches, firing 6 blood shots in all directions, turning the room dark, becoming invisible and chasing Isaac. Briefly becomes visible upon getting hit.
Psy Tumor	253.0	Moves around the room diagonally, occasionally firing 6 homing shots in all directions. Fires more often upon getting damaged.
Floating Knight	254.0	Behaves like the Knight but slower, and can fly over all obstacles.
Lil' Haunt	260.0	Follows Isaac erratically and occasionally shoots a blood shot towards Isaac's destination, predicting his movements.

Degraded Bosses
Blastocyst (small) Chub Dingle The Duke of Flies The Haunt The Headless Horseman (head only) Larry Jr. Mega Fatty Monstro Pin Polycephalus Teratoma (small and medium)

Bosses

The Adversary	The Bloat	The Gate	Loki

Mask of Infamy	The Fallen	The Headless Horseman	War

Brownie	Sisters Vis	The Pile

Double Trouble

Double Trouble Bosses
(Double Trouble) Blighted Ovum (Double Trouble) The Haunt (Double Trouble) The Husk (Double Trouble) Larry Jr. (Double Trouble) Dangle (Double Trouble) Little Horn (Double Trouble) Rag Man

Final Boss

Mom will always appear in the second floor of this chapter or in the last boss room if Curse of the Labyrinth is active.

Mom

Unlockable Achievements

• 

  Something Sticky - Beat chapter 3 20 times.

• 

  Leprosy - Beat chapter 3 without taking damage.

• 

  Dark Boy - Beat chapter 3 without taking damage.

Trivia

• A necropolis is a large ancient cemetery with elaborate tomb monuments. In Ancient Greek, νεκρόπολις or nekropolis literally means "city of the dead".
• In the original Binding of Isaac, Daddy Long Legs, Triachnid, Carrion Queen, and The Wretched could appear as bosses.

Music

The music for Necropolis is titled When Blood Dries.

Binding of Isaac: Rebirth OST