Book of Secrets
AchievementRebirthUnlock unknown
Achievement details
- Achievement number
- 122
- Description
- Unlocked a new item.
- Requirement
- Defeat Satan as Eden
How do you unlock Book of Secrets?
In The Binding of Isaac, Book of Secrets is unlocked by earning the Satan completion mark as Eden (Character).
Structured pathSource-backed requirements are mapped into trackable steps.
Unlocked a new item.
How to unlock: Complete Chapter 4
What unlocking Book of Secrets leads to
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13