Chapters are sets of floors which contain similar enemies, themes, bosses, and difficulties. Earlier chapters are divided into two 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[edit | edit source]

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Basement Cellar

Chapter 2[edit | edit source]

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The Caves The Catacombs

Chapter 3[edit | edit source]

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The Depths Necropolis

Chapter 4[edit | edit source]

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The Womb Utero

Chapter 5[edit | edit source]

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Sheol Cathedral

Chapter 6[edit | edit source]

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Dark Room Chest

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