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Xxx form2.png Isaac Rebirth.png Keeper sprite.png

Catacombs

The Catacombs is an alternate chapter added with the Wrath of the Lamb expansion. Its appearance is similar to the Caves, but has pillars and cobwebs on the walls, as well as stones in the ground.

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
  • -: The room cannot appear in this floor.


Rooms from the core game
Rooms Catacombs 1 Catacombs 2 Catacombs XL Note
Regular Rooms 9 - 11 13 - 14 21-25
Treasure room icon.png Treasure Room 1 1 2
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 Possible Will only be generated if Isaac has full health while entering the floor.
Arcade icon.png Arcade Possible Possible Possible Only generated when Isaac has 5 Coins upon entering a new floor or part.
Super secret room icon.png Devil Room Possible Possible Possible
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 Catacombs 1 Catacombs 2 Catacombs 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 Possible
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 Possible

Monsters

Monster Description WotL DLC
Eternal Fly
White fly.png
Invulnerable Fly that circles Corny PoopNuttypoop.png, Holy LeechesHoly leech.png or HangersHang man.png.
Fat Fly
Superpooter.png
Alternate version of PootersPouter.png. Fires 2 shots in a V-formation and does not deal touch damage.
Red Boom Fly
Spitfly.png
Flies around the room diagonally, dealing touch damage and exploding into 6 directional blood shots upon death.
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.
Gut
Green boil.png
Stationary enemy that shrinks upon being hit. Will quickly swell up if not killed in time. Fires an IPECAC shot at Isaac when fully swollen.
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.
Walking Boil
Walking boil.png
Mobile Boil that cannot shrink, but has a finite amount of health. Fires short-ranged blood shots with varying sizes at a reduced fire rate.
Walking Gut
Walking green boil .png
Mobile Gut that cannot shrink, but has a finite amount of health. Fires IPECAC shots at a reduced fire rate.
Walking Sack
Walking cocoon.png
Mobile Sack that cannot shrink, but has a finite amount of health. Spawns SpidersBlack spider.png.
Gurgle
Green gaper.png
Slowly walks towards Isaac, firing short-ranged IPECAC shots at him. Has much more health than regular Gapers.
Knight
Knights.png
Moves erratically around the room. Can only be damaged from behind.
Clot
Clot2.png
Moves around the room, firing 4 tar shots in an X pattern.
B. Licker
Centipede.png
Attaches itself to other B. Lickers, erratically moving around the room, similar to Larry Jr.
Chubber
Chubby Vis.png
Fires a Little Chubby-like familiar that deals one heart of damage when Isaac gets in its line of sight.
Keeper
Avarice.png
Hops around the room, firing 2 blood shots in a V formation at Isaac.
Red Host
Host2.png
Stationary enemy that can be damaged even when its head is lowered. Fires 5 blood shots instead of 3 when rising, and fires more frequently.
Bosses found in normal rooms:
Fistula
Fistula.png
Floats around the room diagonally, splitting into smaller, faster versions every time it takes damage. Smallest versions spawn a Charger when killed.

Bosses

Room-Layouts

Trivia

  • In real life, Catacombs are human-made subterranean passageways for religious practice.
Chapters
Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6

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