The Caves are the second chapter the player encounters. It takes the shape of a brown stone cave.
This environment introduces Pits and Spikes. The player cannot move over pits without The Ladder, items that give him flight, or bombing an adjacent Rock to fill the hole in.
Spikes hurt Isaac for one heart of damage, unless he has flight.
Caves 2: Note the miniboss fight
TNT barrels are found on this environment. These barrels explode if shot.
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 with the core game | ||||
| Rooms | Caves 1 | Caves 2 | Caves XL | Note |
|---|---|---|---|---|
| Regular Rooms | 9 - 12 | 13 - 14 | 21 - 25 | The player must have Wrath of the Lamb installed for The Caves XL to appear. |
 Treasure Room
|
1 | 1 | 2 | |
 Shop
|
1 | 1 | 1 | There is always one shop, even in XL floors. |
 Secret Room
|
1 | 1 | 1 | |
 Boss Room
|
1 | 1 | 2 | Boss Rooms are always linked in XL floors. |
 Challenge Room
|
Possible | Possible | Possible | Will only be generated if Isaac has full health while entering the floor. |
 Arcade
|
- | Possible | Possible | Only generated when Isaac has 5 Coins upon entering a new floor or part. |
 Devil Room
|
Possible | Possible | Possible | |
| 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 | Caves 1 | Caves 2 | Caves XL | Note |
| Super Secret Room
|
1 | 1 | 1 | |
 Curse Room
|
Possible | Possible | Possible | |
 Sacrifice Room
|
Possible | Possible | Possible | |
 Angel Room
|
Possible | Possible | Possible | |
 Library
|
Possible | Possible | Possible | 5% base chance to spawn, 25% if Isaac is holding a book. |
 Boss Challenge Room
|
Possible | Possible | Possible | |
Monsters[]
| Monster | Description | WotL DLC | |
|---|---|---|---|
Black Fly
|
Tiny black flies that do not hurt Isaac upon touch. | ||
Attack Fly
|
Red Flies that follow Isaac and deal touch damage. | ||
Moter
|
Follows Isaac, similar to Attack Flies. Will split into 2 Attack Flies upon death.
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Red Boom Fly
|
Flies around the room diagonally, dealing touch damage and exploding into 6 directional blood shots upon death. | ||
Sucker
|
Flies slowly towards Isaac, exploding into 4 projectiles in a + formation upon death. | ||
Hive
|
Walks around the room, avoiding Isaac while spawning Attack Flies. Spawns a large number of Flies upon death.
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Hopper
|
Jumps around the room slowly, damaging Isaac by touch. | ||
Gusher
|
Walks aimlessly around the room, firing extremely short-ranged blood projectiles from its head. Usually spawned after killing a Gaper/Frowning Gaper.
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Maw
|
Floats towards Isaac, firing fast-moving blood shots. | ||
Red Maw
|
Floats towards Isaac faster than regular Maws, exploding into 4 blood shots in a plus pattern upon death. Does not fire any shots. | ||
Globin
|
Walks towards Isaac, dealing one heart of contact damage. Turns into a pile of goo after taking enough damage, where it can be killed. Will regenerate after a short amount of time if not killed quickly. | ||
Gazing Globin
|
Quickly walks towards Isaac, dealing one heart of contact damage. Turns into a pile of goo and slides away after taking enough damage, where it can be killed. Will regenerate after a short amount of time if not killed quickly. | ||
Clotty
|
Moves around the room, firing 4 blood shots in a plus pattern. | ||
Clot
|
Moves around the room, firing 4 tar shots in an X pattern. | ||
I. Blob
|
Moves around the room, firing 8 shots in all directions. | ✔ | |
Maggot
|
Aimlessly moves around the room, damaging Isaac by contact. | ||
Charger
|
Slowly moves around the room, charging at Isaac when he gets in its line of sight. | ||
Spitty
|
Slowly moves around the room, firing a single long-ranged blood shot when Isaac gets in its line of sight. | ||
Host
|
Invulnerable stationary enemy. 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 and lower its head again. | ||
Red Host
|
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: | |||
Embryo
|
Aimlessly hops around the room, damaging Isaac by contact damage. | ||
Larry Jr.
|
Multi-segmented enemy that quickly crawls around the room, not targeting Isaac. Constantly leaves trails of Poop. | ||
Fistula
|
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[]
Using Mom's Bra on the first form of Fistula caused a smaller part to get stuck in a corner behind a rock.
Battling Ultra Pride with a green champion familiar.
Battling Ultra Pride with a yellow champion familiar.
Battling the Psychic Maw.
Related Achievements[]
"The Spelunker" - Complete The Caves once.
"Lil Chubby" - Defeat all of the bosses in The Caves. (Fistula, Gurdy, Peep, Chub)
"Spelunker Boy" - Complete The Caves without taking damage.
| Chapters | |||||
|---|---|---|---|---|---|
| Chapter 1 | Chapter 2 | Chapter 3 | Chapter 4 | Chapter 5 | Chapter 6 |
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