Chapters

Chapters are sets of floors which contain similar enemies, themes, bosses, and difficulties. Earlier chapters are divided into three floors, while later chapters contain one floor. Each chapter has different environments which, while retaining the same feel, have slightly different themes, enemies, bosses, and difficulties. Each environment also has its own music.

Chapter 1

Stage Burning Basement room.png
Burning Basement
Dlc a indicator.png Stage Burning Basement icon.png Burning Basement

Chapter 1.5 (Alternative)

Stage Downpour room.png
Downpour
Stage Dross room.png
Dross
Dlc r indicator.png Stage Downpour icon.png Downpour Dlc r indicator.png Stage Dross icon.png Dross

Chapter 2

Stage Flooded Caves room.png
Flooded Caves
Dlc a indicator.png Stage Flooded Caves icon.png Flooded Caves

Chapter 2.5 (Alternative)

Stage Mines room.png
Mines
Stage Ashpit room.png
Ashpit
Dlc r indicator.png Stage Mines icon.png Mines Dlc r indicator.png Stage Ashpit icon.png Ashpit

Chapter 3

Stage Necropolis room.png
Necropolis
Stage Dank Depths room.png
Dank Depths
Stage Necropolis icon.png Necropolis Dlc a indicator.png Stage Dank Depths icon.png Dank Depths

Chapter 3.5 (Alternative)

Stage Mausoleum room.png
Mausoleum
Stage Gehenna room.png
Gehenna
Dlc r indicator.png Stage Mausoleum icon.png Mausoleum Dlc r indicator.png Stage Gehenna icon.png Gehenna

Chapter 4

Stage Utero room.png
Utero
Stage Scarred Womb room.png
Scarred Womb
Stage Utero icon.png Utero Dlc a indicator.png Stage Scarred Womb icon.png Scarred Womb

Chapter 4.5 (Optional/Alternative)

Stage Blue Womb room.png
 ???
Stage Corpse room.png
Corpse
Dlc a indicator.png Stage Blue Womb icon.png ??? Dlc r indicator.png Stage Corpse icon.png Corpse

Chapter 5

Stage Cathedral room.png
Cathedral
Stage Sheol room.png
Sheol
Stage Cathedral icon.png Cathedral Stage Sheol icon.png Sheol

Chapter 6

Stage Dark Room room.png
Dark Room
Stage Dark Room icon.png Dark Room

Endgame (Optional)

Stage The Void room.png
The Void
Stage Home room.png
Home
Dlc a† indicator.png Stage The Void icon.png The Void Dlc r indicator.png Stage Home icon.png Home

Level Generation

For the technical details of how each level / floor is generated, see Level Generation.


SmallIsaac.pngChapters SmallIsaac.png
Chapter 1 Chapter 2 Chapter 3 Chapter 4 Optional Chapter 5 Chapter 6 Endgame
BothIndicator.png Stage Basement icon.png Stage Caves icon.png Stage Depths icon.png Stage Womb icon.png Stage Sheol icon.png
Sheol


Stage Cathedral icon.png
Cathedral
Stage Dark Room icon.png
Dark Room


Stage Chest icon.png
The Chest
The Basement The Caves The Depths The Womb
Dlc a indicator.png Dlc a† indicator.png
Stage Cellar icon.png Stage Catacombs icon.png Stage Necropolis icon.png Stage Utero icon.png Stage Blue Womb icon.png Stage The Void icon.png
The Cellar The Catacombs Necropolis Utero ??? The Void
Dlc a indicator.png Dlc a indicator.png Dlc a indicator.png Dlc a indicator.png
Stage Burning Basement icon.png Stage Flooded Caves icon.png Stage Dank Depths icon.png Stage Scarred Womb icon.png
Burning Basement Flooded Caves Dank Depths Scarred Womb
Dlc r indicator.png Dlc r indicator.png Dlc r indicator.png Dlc r indicator.png Dlc r indicator.png
Stage Downpour.png Stage Mines icon.png Stage Mausoleum icon.png Stage Corpse icon.png Stage Home icon.png
Downpour Mines Mausoleum Corpse Home
Dlc r indicator.png Dlc r indicator.png Dlc r indicator.png
Stage Dross icon.png Stage Ashpit icon.png Stage Gehenna icon.png
Dross Ashpit Gehenna
Dlc a indicator.png
Both Greed Modes Indicator.png
Dlc a indicator.png Dlc a indicator.png
Stage Basement icon.png Stage Caves icon.png Stage Depths icon.png Stage Womb icon.png Stage Sheol icon.png Stage Chest icon.png Stage Ultra Greed.png
The Basement The Caves The Depths The Womb Sheol The Shop Ultra Greed
SmallIsaac.png The Binding of Isaac: Rebirth SmallIsaac.png
MainPageAchievements.png Achievements MainPageAttributes.png Attributes MainPageBosses.png Bosses TarotCard.png Cards and Runes MainPageChallenges.png Challenges MainPageChapters.png Chapters
Character Isaac appearance.png Characters MainPageBabies.png Co-op MainPageItems Small.png Items Collectible Isaac's Tears icon.png Item pools MainPageMonsters.png Monsters MainPageObjects.png Objects
Red Heart.png Pickups BlueBlue.png Pills MainPageRooms.png Rooms MainPageSeeds2.png Seeds Transformation Guppy appearance.png Transformations Trinket The Left Hand icon.png Trinkets
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