The Cellar

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The   Cellar

Table dividing line 1.png
Stage ID
Normal and hard modes only 2
Floor ID
Normal and hard modes only 1a, 2a
Table dividing line 2.png
Unlock Method
The Cellar Beat all The Basement bosses (not restricted to beating bosses in The Basement)

The Cellar is one of the environments in Chapter 1. It is unlocked after defeating each boss in The Basement The Basement, including defeating the smallest twin first in Gemini's fight. It is not necessary to defeat Steven to unlock the Cellar. The theme of the Cellar is spiders and poop.

Monsters[edit | edit source]

Entity ID Description
Frowning Gaper
Frowning Gaper
10.0 Walks towards Isaac, dealing contact damage. Upon getting near Isaac, it will open its eyes and pursue Isaac faster. Usually turns into a Pacer or a Gusher upon death.
Gaper
Gaper
10.1 Walks towards Isaac, dealing contact damage. Usually turns into a Pacer or a Gusher upon death.
Gusher
Gusher
11.0 Walks aimlessly around the room, occasionally firing a short ranged blood shot.
Pacer
Pacer
11.1 Walks aimlessly around the room.
Horf
Horf
12.0 Stationary enemy that fires a medium-ranged blood shot at Isaac when he gets in range of them.
Pooter
Pooter
14.0 Slowly drifts toward Isaac, occasionally firing a single blood shot at him. Does not deal contact damage.
Super Pooter
Super Pooter
14.1 Slowly drifts toward Isaac, occasionally firing two blood shots in a V-formation at him. Does not deal contact damage.
Clotty
Clotty
15.0 Randomly wanders around the room, firing 4 blood shots in the cardinal directions.
Clot
Clot
15.1 Randomly wanders around the room, firing 4 tar shots in the ordinal directions.
I.Blob
I.Blob
15.2 Randomly wanders around the room, firing 8 shots in all directions.
Mulligan
Mulligan
16.0 Walks around the room, avoiding Isaac. Upon death, spawns several flies, which can be Black Flies, Attack Flies, and/or Pooters. Can suicide to explode and launch four projectiles in the cardinal directions while still releasing flies.
Mulligoon
Mulligoon
16.1 Walks around the room, avoiding Isaac. Upon death, spawns a Troll Bomb and fires four shots in the ordinal directions. Can suicide to explode, spawn a Troll bomb, and launch eight projectiles in all directions.
Mulliboom
Mulliboom
16.2 Chases Isaac and explodes upon death or upon touching Isaac. The explosion deals a half-heart of damage instead of the regular full heart.
Attack Fly
Attack Fly
18.0 Red fly that follows Isaac and deals touch damage.
Trite
Trite
29.1 Quickly leaps towards Isaac and deals touch damage.
Sack
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.
Slide
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.
Sucker
Sucker
61.0 Flies slowly towards Isaac, exploding into 4 shots in the cardinal directions upon death.
Spit
Spit
61.1 Flies slowly towards Isaac, firing an Ipecac shot towards Isaac upon death.
Embryo
Embryo
77.0 Aimlessly hops around the room, dealing contact damage.
Moter
Moter
80.0 Follows Isaac, similar to Attack Flies. Splits into 2 Attack Flies upon death.
Spider
Spider
85.0 Erratically moves around the room. If Isaac gets close to it, it chases him, trying to deal contact damage.
Walking Sack
Walking Sack
88.2 Does not shrink or regenerate. Walks around aimlessly and occasionally spawns Spiders.
Big Spider
Big Spider
94.0 Erratically moves around the room. If Isaac gets close to it, it chases him, trying to deal contact damage. Spawns two Spiders upon death.
Nest
Nest
205.0 Wanders around the room, avoiding Isaac and spawning Spiders if he gets close. Spawns a Big Spider or Trite upon death.
Baby Long Legs
Baby Long Legs
206.0 Runs away from Isaac and frequently spawns Spiders.
Small Baby Long Legs
Small Baby Long Legs
206.1 Runs away from Isaac and occasionally spawns Sacks.
Crazy Long Legs
Crazy Long Legs
207.0 Chases Isaac, dealing touch damage. Occasionally stops to spit 8 blood shots in all directions.
Small Crazy Long Legs
Small Crazy Long Legs
207.1 Chases Isaac, dealing touch damage. Occasionally stops to spit 4 blood shots in the diagonal directions.
Fatty
Fatty
208.0 Slowly walks towards Isaac. Occasionally farts, which pushes Isaac and adjacent enemies away.
Blubber
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
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 or Half Sack upon death.
Level 2 Fly
Level 2 Fly
214.0 Flies toward Isaac erratically, dealing touch damage.
Level 2 Spider
Level 2 Spider
215.0 Crawls around the room erratically, following Isaac and dealing touch damage. Can jump small distances.
Dip
Dip
217.0 Slowly dashes in random directions, dealing contact damage.
Brownie Corn
Brownie Corn
Added in Afterbirth
217.2 Quickly dashes in random directions, dealing contact damage.
Wall Hugger
Wall Hugger
218.0 Moves around the room like Guts, damaging Isaac by contact. Cannot be destroyed.
Squirt
Squirt
220.0 Dashes towards Isaac and deals contact damage. Spawns 2 Dips upon death.
Ring Fly
Ring Fly
222.0 Gathers with any other Ring Flies in the room. These flies orbit around themselves while following Isaac.
Skinny
Skinny
226.0 Slowly walks towards Isaac, leaving short-lasting Red Creep behind itself.
Wall Creep
Wall Creep
240.0 Crawls along walls to try to line up with Isaac and shoots three blood shots in a line.
Round Worm
Round Worm
244.0 Pops out of the ground in random locations and spits a blood shot at Isaac if he is in sight.
Ragling
Ragling
246.0 Quickly leaps towards Isaac and deals touch damage. Randomly shoots two purple shots that orbit around it.
Psychic Horf
Psychic Horf
248.0 Stationary enemy that fires a homing shot at Isaac when he gets in range of them.
Full Fly
Full Fly
249.0 Flies toward Isaac erratically, dealing touch damage. Releases 6 bullets in all directions upon death.
Ticking Spider
Ticking Spider
250.0 Crawls around the room erratically, following Isaac and dealing touch damage. Can jump small distances. Explodes upon death.
Dart Fly
Dart Fly
Added in Afterbirth
256.0 Flies towards Isaac and attempts to mimic his movements. Deals contact damage.
Conjoined Fatty
Conjoined Fatty
Added in Afterbirth
257.0 Slowly walks towards Isaac. Occasionally pauses to fart out a line of damaging Green Creep towards Isaac. Chance to turn into a regular Fatty upon death.
Roundy
Roundy
Added in Afterbirth
276.0 Pops out of the ground in random locations, creating a small rock wave. Fires an explosive Ipecac shot at Isaac if he is in sight.
Black Globin's Head
Black Globin's Head
Added in Afterbirth
279.0 Slides towards Isaac, leaving a trail of damaging Red Creep.
Black Globin's Body
Black Globin's Body
Added in Afterbirth
280.0 Walks aimlessly around the room, occasionally spawning spiders.
Swarm Fly
Swarm Fly
Added in Afterbirth
281.0 Follows Isaac in large groups and deals contact damage.
Mega Clotty
Mega Clotty
Added in Afterbirth
282.0 Slowly moves around the room, occasionally hopping and either firing 6 blood shots in all directions, leaving a puddle of Red Creep, or spawning a Clotty or a collapsed Globin. Splits into two Clotties upon death.
Cyclopia
Cyclopia
Added in Afterbirth
284.0 Walks towards Isaac, dealing contact damage and leaving behind a short-lasting trail of damaging Red Creep. Occasionally shoots a blood shot towards Isaac.
Ulcer
Ulcer
Added in Afterbirth
289.0 Pops out of the ground in random locations and spawns a Dart Fly if Isaac is in sight. Fires a blood shot after spawning 6 Dart Flies.
Blue Gaper
Blue Gaper
Added in Afterbirth
297.0 Walks towards Isaac, dealing contact damage.
Greed Gaper
Greed Gaper
Added in Afterbirth
299.0 Walks towards Isaac, dealing contact damage.
Stoney
Stoney
Added in Afterbirth †
302.0 Chases Isaac and blocks tears, but does not deal contact damage. Temporarily pauses in exhaustion after a certain amount of time. Invulnerable; dies when the room is cleared.
Portal
Portal
Added in Afterbirth †
306.0 Spawns various enemies from the current floor until it either vanishes or is killed.
Degraded Bosses

Bosses[edit | edit source]

Boss Blighted Ovum.png
Boss The Duke of Flies.png
Boss Fistula.png
Boss The Haunt.png
Blighted Ovum The Duke of Flies Fistula Removed in Repentance The Haunt
Boss Pin.png
Boss Widow.png
Boss The Fallen.png
Boss Famine.png
Pin Widow The Fallen Requires previous entry into a devil room Famine Needs to be unlocked
Boss The Headless Horseman.png
Boss Little Horn.png
Boss Rag Man.png
The Headless Horseman Needs to be unlocked Little Horn Added in Afterbirth Needs to be unlocked Rag Man Added in Afterbirth Needs to be unlocked Baby Plum Added in Repentance

Notes[edit | edit source]

  • Unlocking the Cellar requires defeating every boss in the Basement. However, this does not require fighting them in the Basement. It is possible, for instance, to have defeated every single boss except for the Gurglings, encounter them in the Womb, clear the room in which they are encountered, and successfully unlock the Cellar.

Trivia[edit | edit source]

In the original Binding of Isaac, Gurdy Jr. could appear as a boss.

Unlockable Achievements[edit | edit source]

  • Basement Boy
    Basement Boy - Beat chapter 1 without taking damage.

Music[edit | edit source]

The music for the cellar is titled Periculum. Periculum is Latin for "danger" or "risk", signifying how the Cellar is a step-up from the Basement.

Binding of Isaac: Rebirth OST


SmallIsaac.pngChaptersSmallIsaac.png
Chapter 1 Chapter 2 Chapter 3 Chapter 4 Optional Chapter 5 Chapter 6 Endgame
Normal and hard modes only Stage The Basement icon.png Stage The Caves icon.png Stage The Depths icon.png Stage The Womb icon.png Stage Sheol icon.png
Sheol


Stage Cathedral icon.png
Cathedral
Stage Dark Room icon.png
Dark Room


Stage The Chest icon.png
The Chest
The Basement The Caves The Depths The Womb
Added in Afterbirth Added in Afterbirth †
Stage The Cellar icon.png Stage The Catacombs icon.png Stage Necropolis icon.png Stage Utero icon.png ??? Stage The Void icon.png
The Cellar The Catacombs Necropolis Utero ??? The Void
Added in Afterbirth Added in Afterbirth Added in Afterbirth Added in Afterbirth
Stage Burning Basement icon.png Stage Flooded Caves icon.png Stage Dank Depths icon.png Stage Scarred Womb icon.png
Burning Basement Flooded Caves Dank Depths Scarred Womb
Added in Repentance Added in Repentance Added in Repentance Added in Repentance Added in Repentance
Stage Downpour.png Stage Mines icon.png Stage Mausoleum icon.png Stage Corpse icon.png Stage Home icon.png
Downpour Mines Mausoleum Corpse Home
Added in Repentance Added in Repentance Added in Repentance
Stage Dross icon.png Stage Ashpit icon.png Stage Gehenna icon.png
Dross Ashpit Gehenna
Added in Afterbirth
Greed and greedier modes only
Added in Afterbirth Added in Afterbirth
Stage The Basement icon.png Stage The Caves icon.png Stage The Depths icon.png Stage The Womb icon.png Stage Sheol icon.png The Shop Ultra Greed
The Basement The Caves The Depths The Womb Sheol The Shop Ultra Greed
The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth
Achievements Achievements Attributes Attributes Bosses Bosses TarotCard.png Cards and Runes Challenges Challenges Chapters Chapters
Characters Characters MainPageBabies.png Co-op Items Items Item pools Item pools Monsters Monsters Objects Objects
Pickups Pickups Pills Pills Rooms Rooms Seeds Seeds Transformations Transformations Trinkets Trinkets