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

Basement	Cellar	Burning Basement
Basement	Cellar	Burning Basement

Chapter 1.5 (Alternative)

Downpour	Dross
Downpour	Dross

Chapter 2

Caves	Catacombs	Flooded Caves
Caves	Catacombs	Flooded Caves

Chapter 2.5 (Alternative)

Mines	Ashpit
Mines	Ashpit

Chapter 3

Depths	Necropolis	Dank Depths
Depths	Necropolis	Dank Depths

Chapter 3.5 (Alternative)

Mausoleum	Gehenna
Mausoleum	Gehenna

Chapter 4

Womb	Utero	Scarred Womb
Womb	Utero	Scarred Womb

Chapter 4.5 (Optional/Alternative)

???	Corpse
???	Corpse

Chapter 5

Cathedral	Sheol
Cathedral	Sheol

Chapter 6 (Optional)

Chest	Dark Room
Chest	Dark Room

Endgame (Optional)

The Void	Home
The Void	Home

Level Generation

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

The Binding of Isaac: Rebirth
Achievements	Attributes	Bosses	Cards and Runes	Challenges	Chapters
Characters	Co-op	Items	Item pools	Monsters	Objects
Pickups	Pills	Rooms	Seeds	Transformations	Trinkets