The Basement

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Basement.png

The Basement is one of the environments in Chapter 1. Unlocked at the beginning of the game, it is considered the easiest of the environments in the game. The theme of the Basement is flies and poop.

The Basement's harder unlockable variants are The Cellar and the Added in Afterbirth Burning Basement.

Monsters[edit | edit source]

Monsters Description
Clotty
Clotty
Randomly wanders around the room, firing 4 blood shots in the cardinal directions.
Clot
Clot
Randomly wanders around the room, firing 4 tar shots in the ordinal directions.
I.Blob
I.Blob
Randomly wanders around the room, firing 8 shots in all directions.
Ministro
Ministro
Added in Afterbirth †
Hops towards Isaac, occasionally spitting out a cluster of disorganized shots.
Dip
Dip
Slowly dashes in random directions, dealing contact damage.
Corn
Corn
Added in Afterbirth
Quickly dashes in random directions, dealing contact damage.
Squirt
Squirt
Dashes towards the player and deals contact damage. Spawns 2 Dips upon death.
Embryo
Embryo
Aimlessly hops around the room, dealing contact damage.
Fatty
Fatty
Slowly walks towards Isaac. Occasionally farts, which pushes Isaac and adjacent enemies away.
Conjoined Fatty
Conjoined Fatty
Added in Afterbirth
Slowly walks towards Isaac. Occasionally pauses to fart out a line of damaging green creep towards Isaac. Chance to turn into a regular Fatty upon death.
Stoney
Stoney
Added in Afterbirth †
Chases Isaac and blocks tears, but does not deal contact damage. Temporarily pauses in exhaustion after a certain amount of time. Invulnerable; dies when the room is cleared.
Black Fly
Black Fly
Tiny black fly with neutral AI. Does not hurt Isaac upon touch.
Attack Fly
Attack Fly
Red fly that follows Isaac and deals touch damage.
Ring Fly
Ring Fly
Gathers with any other Ring Flies in the room. These flies orbit around themselves, while following Isaac.
Dart Fly
Dart Fly
Added in Afterbirth
Flies towards Isaac and attempts to mimic his movements. Deals contact damage.
Swarm Fly
Swarm Fly
Added in Afterbirth
Follows Isaac in large groups and deals contact damage.
Moter
Moter
Follows Isaac, similar to Attack Flies. Splits into 2 Attack Flies upon death.
Pooter
Pooter
Slow-moving fly that occasionally fires single blood shots at Isaac. Does not deal touch damage.
Level 2 Fly
Level 2 Fly
Flies toward Isaac erratically, dealing touch damage.
Full Fly
Full Fly
Flies toward Isaac erratically, dealing touch damage. Splits into 6 directional shots upon death.
Sucker
Sucker
Flies slowly towards Isaac, exploding into 4 shots in the cardinal directions upon death.
Gaper
Gaper
Walks towards Isaac, dealing contact damage. Usually turns into a Pacer or a Gusher upon death.
Frowning Gaper
Frowning Gaper
Walks towards Isaac, dealing contact damage. Upon getting near Isaac, it will open its eyes and pursue Isaac faster. Usually turns into a Pacer or a Gusher upon death.
Skinny
Skinny
Slowly walks towards Isaac, leaving short-lasting red creep behind itself.
Hopper
Hopper
Slowly hops around the room, dealing touch damage. Can turn into a Flaming Hopper by jumping into fire.
Flaming Hopper
Flaming Hopper
Quickly hops around the room, dealing touch damage. Covers a larger distance than the regular Hopper.
Horf
Horf
Stationary enemy that fires a medium ranged blood shot at Isaac when he gets in range of them.
Psychic Horf
Psychic Horf
Stationary enemy that fires a homing shot at Isaac when he gets in range of them.
Mulligan
Mulligan
Walks around the room, avoiding Isaac. Upon death, spawns several flies, which can be Black Flies, Attack Flies, or Pooters. Can suicide to explode and launch projectiles in the four ordinal directions while still releasing flies.
Mulligoon
Mulligoon
Walks around the room, avoiding Isaac. Upon death, spawns a Troll Bomb and fires four shots in the ordinal directions. Can suicide to explode, spawn a Troll bomb, and launch projectiles in eight directions.
Mulliboom
Mulliboom
Chases Isaac and explodes upon death or upon touching Isaac. The explosion deals a half-heart of damage instead of the regular full heart.
Nest
Nest
Walks around the room, avoiding Isaac while spawning Spiders. Spawns a Big Spider or a Trite upon death.
Nerve Ending
Nerve Ending
Static enemy which acts as a meat shield.
Pacer
Pacer
Walks aimlessly around the room.
Gusher
Gusher
Walks aimlessly around the room, occasionally firing short-ranged blood shots.
Round Worm
Round Worm
Pops out of the ground in random locations and spits a blood shot at Isaac if he is in sight.
Roundy
Roundy
Added in Afterbirth
Pops out of the ground in random locations, creating a small rock wave. Fires an explosive Ipecac shot at Isaac if he is in sight.
Ulcer
Ulcer
Added in Afterbirth
Pops out of the ground in random locations and spawns a Dart Fly if Isaac is in sight. Fires a blood shot after spawning 6 Dart Flies.
Spider
Spider
Erratically moves towards Isaac and deals touch damage.
Level 2 Spider
Level 2 Spider
Crawls around the room erratically, following Isaac and dealing touch damage. Can jump small distances.
Baby Long Legs
Baby Long Legs
Runs away from Isaac and frequently spawns Spiders.
Small Baby Long Legs
Small Baby Long Legs
Runs away from Isaac and occasionally spawns Sacks.
Crazy Long Legs
Crazy Long Legs
Chases Isaac, dealing touch damage. Occasionally stops to spit blood shots in 8 directions.
Small Crazy Long Legs
Small Crazy Long Legs
Chases Isaac, dealing touch damage. Occasionally stops to spit blood shots diagonally in 4 directions.
Wall Creep
Wall Creep
Crawls along walls to try to line up with Isaac and shoots three blood shots in a line.
Poky
Poky
Slides around the room aimlessly, damaging Isaac by contact. Disappears when the room is cleared.

Bosses[edit | edit source]

Boss Monstro.png
Boss Gemini.png
Boss Dingle.png
Boss Larry Jr..png
Monstro Gemini Dingle Larry Jr.
Boss The Duke of Flies.png
Boss Gurglings.png
Boss Famine.png
Boss Steven.png
The Duke of Flies Gurglings Famine Needs to be unlocked Steven Needs to be unlocked
Boss Little Horn.png
Boss Rag Man.png
Boss Turdlings.png
Link=Dangle
Little Horn Added in Afterbirth Needs to be unlocked Rag Man Added in Afterbirth Needs to be unlocked Turdlings Added in Afterbirth Needs to be unlocked Dangle Added in Afterbirth Needs to be unlocked

Unlockable Achievements[edit | edit source]

  • Basement Boy
    Basement Boy - Beat chapter 1 without taking damage.

Music[edit | edit source]

The music for the Basement is titled Diptera Sonata. Diptera is the order of true flies. Thus, Diptera Sonata literally means "Fly Sonata".

Binding of Isaac: Rebirth Music


SmallIsaac.pngChaptersSmallIsaac.png
Chapter 1 Chapter 2 Chapter 3 Chapter 4 Optional Chapter 5 Chapter 6 Endgame
Normal mode only
Hard mode only
Stage basement.png Stage caves.png Stage depths.png Stage womb.png Stage sheol.png
Sheol


Stage cathedral.png
Cathedral
Stage dark room.png
Dark Room


Stage chest.png
The Chest
The Basement The Caves The Depths The Womb
Added in Afterbirth Added in Afterbirth †
Stage cellar.png Stage catacombs.png Stage necropolis.png Stage utero.png ??? Stage the void.png
The Cellar The Catacombs Necropolis Utero ??? The Void
Added in Afterbirth Added in Afterbirth Added in Afterbirth Added in Afterbirth
Stage burning basement.png Stage flooded caves.png Stage dank depths.png Stage scarred womb.png
Burning Basement Flooded Caves Dank Depths Scarred Womb
Added in Afterbirth Greed mode only
Added in Afterbirth † Greedier mode only
Added in Afterbirth Added in Afterbirth
Stage basement.png Stage caves.png Stage depths.png Stage womb.png Stage sheol.png The Shop Ultra Greed
The Basement The Caves The Depths The Womb Sheol The Shop Ultra Greed


The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth
MainPageAchievements.png Achievements MainPageAttributes.png Attributes MainPageBosses.png Bosses TarotCard.png Cards and Runes MainPageChallenges.png Challenges MainPageChapters.png Chapters
Isaac App.png Characters MainPageBabies.png Co-op MainPageItems Small.png Items Item Pools Item Pools MainPageMonsters.png Monsters MainPageObjects.png Objects
Red heart.png Pickups BlueBlue.png Pills MainPageRooms.png Rooms MainPageSeeds2.png Seeds Guppy App.png Transformations The Left Hand Icon.png Trinkets