Skip to content

26%

IBS

AchievementRepentanceUnlock unknown

Achievement details

Achievement number: 588
Description: ???
Requirement: Defeat Delirium as Tainted ???

How do you unlock IBS?

In The Binding of Isaac, IBS is unlocked by earning the Delirium completion mark as Tainted ???.

Structured pathSource-backed requirements are mapped into trackable steps.

???

Tainted ??? → Delirium (normal)
1. Defeat Hush to unlock The Void. source
2. A Void portal can appear after a major boss; defeating Hush guarantees one. source
3. Defeat Delirium, the main boss of The Void. source
- Tainted ???
  - The Soiled
    How to unlock: Use Red Key (etc.) to open the hidden closet in Home as ???

Show full path Show missing

What unlocking IBS leads to

Source: bindingofisaacrebirth.wiki.gg

Imported 2026-09-13