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Compound Fracture

AchievementAfterbirth+Unlock unknown

Achievement details

Achievement number: 291
Description: Unlocked a new item.
Requirement: Defeat Delirium as Lazarus

How do you unlock Compound Fracture?

In The Binding of Isaac, Compound Fracture is unlocked by earning the Delirium completion mark as Lazarus (Character).

Structured pathSource-backed requirements are mapped into trackable steps.

Unlocked a new item.

Lazarus (Character) → 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
- Lazarus (Character)
  - Lazarus (Achievement)
    How to unlock: Have 4 or more Soul Hearts at one time

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What unlocking Compound Fracture leads to

Source: bindingofisaacrebirth.wiki.gg

Imported 2026-09-13