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The Soul

AchievementRebirthUnlock unknown

Achievement details

Achievement number: 132
Description: Unlocked a new item.
Requirement: Defeat The Lamb as The Lost

How do you unlock The Soul?

In The Binding of Isaac, The Soul is unlocked by earning the The Lamb completion mark as The Lost (Character).

Structured pathSource-backed requirements are mapped into trackable steps.

Unlocked a new item.

See the full unlock path for The Soul — 8 steps

The Lost (Character) → The Lamb (normal)
1. Defeat Satan 5 times to unlock The Negative. source
2. The Negative is a guaranteed drop from Mom; take it, then defeat Satan in Sheol and touch the chest to enter Dark Room. source
3. Find and defeat The Lamb in Dark Room. source
- The Lost (Character)
  - The Lost (Achievement)

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What unlocking The Soul leads to

Source: bindingofisaacrebirth.wiki.gg

Imported 2026-09-13