The Caves are the second environment 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.
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
9 - 12
13 - 14
21 - 25
The player must have Wrath of the Lamb installed for The Caves XL to appear.
There is always one shop, even in XL floors.
Boss Rooms are always linked in XL floors.
Will only be generated if Isaac has full health while entering the floor.
Only generated when Isaac has 5 Coins upon entering a new floor or part.
I AM ERROR
Only reachable by using the Telepills, which have a 6.66% chance to teleport Isaac to this room.
Rooms with Wrath of the Lamb
Super Secret Room
5% base chance to spawn, 25% if Isaac is holding a book.
Boss Challenge Room
Tiny black flies that do not hurt Isaac upon touch.
Red Flies that follow Isaac and deal touch damage.
Follows Isaac, similar to Attack Flies. Will split into 2 Attack Flies upon death.
Red Boom Fly
Flies around the room diagonally, dealing touch damage and exploding into 6 directional blood shots upon death.
Flies slowly towards Isaac, exploding into 4 projectiles in a + formation upon death.
Walks around the room, avoiding Isaac while spawning Attack Flies . Spawns a large number of Flies upon death.
Jumps around the room slowly, damaging Isaac by touch.
Walks aimlessly around the room, firing extremely short-ranged blood projectiles from its head. Usually spawned after killing a Gaper/Frowning Gaper.
Floats towards Isaac, firing fast-moving blood shots.
Floats towards Isaac faster than regular Maws, exploding into 4 blood shots in a plus pattern upon death. Does not fire any shots.
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.
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.
Moves around the room, firing 4 blood shots in a plus pattern.
Moves around the room, firing 4 tar shots in an X pattern.
Moves around the room, firing 8 shots in all directions.
Aimlessly moves around the room, damaging Isaac by contact.
Slowly moves around the room, charging at Isaac when he gets in its line of sight.
Slowly moves around the room, firing a single long-ranged blood shot when Isaac gets in its line of sight.
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.
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:
Aimlessly hops around the room, damaging Isaac by contact damage.
Multi-segmented enemy that quickly crawls around the room, not targeting Isaac. Constantly leaves trails of Poop.
Floats around the room diagonally, splitting into smaller, faster versions every time it takes damage. Smallest versions spawn a Charger when killed.
- Complete The Caves once. "The Spelunker"
- Defeat all of the bosses in The Caves. ( "Lil Chubby" Fistula, Gurdy, Peep, Chub)
- Complete The Caves without taking damage.