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Xxx form2.png Isaac Rebirth.png

The Cellar is a chapter added in the Wrath of the Lamb DLC. Its appearance is similar to the Basement, but it has cobwebs on the walls and the floor is made of rotting wood. In rebirth you have to unlock it by killing each boss in the Basement including the smaller twin first during gemini fight its not necessary to fight steven

A beta screenshot of the Cellar.

Many rooms in Cellar have spider webs in them which slow down things that pass through it. These spider webs can be destroyed by explosions.

The monsters "indigenous" to this floor are Spiders.

Rooms

  • 1: The room will always appear once in this floor
  • 2: The room will always appear twice in this floor
  • Possible: There is a chance for this room to appear, usually due to certain criteria being met
  • *: This room can only appear due to a bug or special item
  • -: The room cannot appear in this floor.


Rooms with the core game
Rooms Cellar 1 Cellar 2 Cellar XL Note
Regular Rooms 10-12 14-15 21-25
Treasure room icon.png Treasure Room 1 1 2 Both Treasure Rooms are locked in The Cellar XL.
Shop icon.png Shop 1 1 1 There is always one shop, even in XL floors.
Secret room icon.png Secret Room 1 1 1
BossRoomIcon.png Boss Room 1 1 2 Boss Rooms are always linked in XL floors.
Challegne room icon.png Challenge Room - Possible Possible Will only be generated if Isaac has full health while entering the floor. Cannot appear in The Cellar 1.
Arcade icon.png Arcade - Possible - Only generated when Isaac has 5 Coins upon entering a new floor or part.
Super secret room icon.png Devil Room * Possible Possible Only reachable by The Joker card.
Super secret room icon.png I AM ERROR Possible Possible Possible Only reachable by using the Telepills, which have a 6.66% chance to teleport Isaac to this room.
Rooms with Wrath of the Lamb
Rooms Cellar 1 Cellar 2 Cellar XL Note
Super secret room icon.png Super Secret Room 1 1 1
Curse room icon.png Curse Room Possible Possible Possible
Sacrifice room icon.png Sacrifice Room Possible Possible Possible
Angel room icon.png Angel Room * Possible Possible Only reachable by The Joker card.
Libary icon.png Library Possible Possible Possible 5% base chance to spawn, 25% if Isaac is holding a book.
Boss challenge room.png Boss Challenge Room * Possible Possible Can spawn on The Cellar 1, probably due to a bug.

Monsters

Monster Description WotL DLC
Spit
Puffer.png
Flies slowly towards Isaac, exploding into an IPECAC shot upon death which targets other Spits in the room, or Isaac.
Spider
Black spider.png
Moves erratically around the room, damaging Isaac by touch.
Big Spider
Big spider.png
Moves erratically around the room, splitting into two SpidersBlack spider.png upon death.
Trite
Spider hopper.png
Quickly jumps towards Isaac with high distance.
Sack
White boil.png
Stationary enemy that shrinks upon being hit. Swells up slower than Guts and Boils. Spawns a SpiderBlack spider.png when fully swollen.
Mulligoon
Mulligoon.png
Harmless enemy that walks around the room, avoiding Isaac. Will drop a Troll BombTroll bomb.png upon death.
Mulliboom
Mulliboom.png
Walks towards Isaac, exploding with a large blast radius upon death or upon touching Isaac. The explosion does a half-heart of damage instead of the regular full heart.
Gusher
Gusher.png
Walks aimlessly around the room, firing extremely short-ranged blood projectiles from its head. Usually spawned after killing a Gaper/Frowning Gaper.Gaper.png
Gaper
Gaper.png
Walks towards Isaac, dealing contact damage. Usually turns into a PacerPacer.png or GusherGusher.png upon death.
Frowning Gaper
Frowninggaper.png
Walks towards Isaac, dealing contact damage. Usually turns into a PacerPacer.png or GusherGusher.png upon death.
Horf
Horfs.png
Stationary enemy that fires medium ranged blood shots at Isaac.
Clotty
Clotty.png
Moves around the room, firing 4 blood shots in a plus pattern.
Clot
Clot2.png
Moves around the room, firing 4 tar shots in an X pattern.
Bosses found in normal rooms:
Embryo
Embryo.png
Aimlessly hops around the room, damaging Isaac by contact damage.

Bosses

Trivia

  • When Wrath of the Lamb was first announced, many thought that the alternate floor would be called the Attic instead of the Cellar.
  • The music in The Cellar was used in the demo.

Room Layouts

Chapters
Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6

The ChestDLC.png

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