The Basement is the first floor in The Binding of Isaac and the Rebirth remake, which takes the appearance of an unfinished basement, that possibly has brick walls. The monsters "indigenous" to the chapter are Flies.
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 | Basement 1 | Basement 2 | Basement XL | Note |
---|---|---|---|---|
Regular Rooms | 7 - 11 | 13 - 14 | 21-25 | The player must have Wrath of the Lamb installed for The Basement XL to appear. |
Treasure Room | 1 | 1 | 2 | |
Shop | 1 | 1 | 1 | There is always one shop (except in The Womb / Utero), 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 | - | Only generated when Isaac has 5 or more Coins upon entering a new floor or part. |
Devil Room | * | Possible | Possible | *Only reachable by The Joker card. |
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 | Basement 1 | Basement 2 | Basement XL | Note |
Super Secret Room | 1 | 1 | 1 | |
Curse Room | Possible | Possible | Possible | |
Sacrifice Room | Possible | Possible | Possible | |
Angel Room | * | Possible | Possible | *Only reachable by The Joker card. |
Library | Possible | Possible | Possible | 5% base chance to spawn, 25% if Isaac is holding a book. |
Boss Challenge Room | * | Possible | Possible | Can spawn on The Basement 1, probably due to a bug. |
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. | ||
Eternal Fly |
Invulnerable Fly that sticks to corny poop , Holy Leeches , Hangmans , Psychic Maws File:Psychic maw.png, rarely Mr. Maws and very rarely Maws . | ✔ | |
Pooter |
Moves slowly around, shooting 1 projectile at Isaac when he gets near. | ||
Sucker |
Flies slowly towards Isaac, exploding into 4 projectiles in a + formation upon death. | ||
Mulligan |
Harmless enemy that walks around the room, avoiding Isaac. Will spawn multiple flies upon death. | ||
Mulligoon |
Harmless enemy that walks around the room, avoiding Isaac. Will drop a Troll Bomb upon death. | ||
Hopper |
Jumps around the room slowly, damaging Isaac by touch. | ||
Flaming Hopper |
Jumps around the room quickly, covering a large distance, similar to Trites. | ||
Pacer |
Walks aimlessly around the room. Usually spawned after killing a Gaper/Frowning Gaper. | ||
Gusher |
Walks aimlessly around the room, firing extremely short-ranged blood projectiles from its head. Usually spawned after killing a Gaper/Frowning Gaper. | ||
Gaper |
Walks towards Isaac, dealing contact damage. Usually turns into a Pacer or Gusher upon death. | ||
Frowning Gaper |
Walks towards Isaac, dealing contact damage. Usually turns into a Pacer or Gusher upon death. | ||
Horf |
Stationary enemy that fires medium ranged blood shots at Isaac. | ||
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. | ✔ | |
Bosses found in normal rooms: | |||
Embryo |
Aimlessly hops around the room, damaging Isaac by contact damage. |
Bosses
Notes
- Locked treasure rooms cannot spawn on Basement 1 unless it is the XL version of it.
- A Challenge Room cannot spawn on Basement 1. However, Boss Challenge Rooms can.
- A devil room or Angel Room cannot spawn on The Basement 1, but you can teleport there.
- An Arcade cannot spawn on The Basement 1.
- There will be no tutorial if you spawned in a XL floor.
Room-layouts
Original
Rebirth
Related Achievements
"The Radioactive Spider" - Complete The Basement once.
"Monstro's Tooth" - Defeat all of the bosses in The Basement. (Duke of Flies, Monstro, Gemini, Larry Jr.)
"Basement Boy" - Complete The Basement without taking damage.
Chapters | |||||
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Chapter 1 | Chapter 2 | Chapter 3 | Chapter 4 | Chapter 5 | Chapter 6 |
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