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Curved Horn

AchievementRebirthUnlock unknown

Achievement details

Achievement number: 52
Description: Unlocked a new item.
Requirement: Defeat The Lamb as Judas

How do you unlock Curved Horn?

In The Binding of Isaac, Curved Horn is unlocked by earning the The Lamb completion mark as Judas (Character).

Structured pathSource-backed requirements are mapped into trackable steps.

Unlocked a new item.

Judas (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
- Judas (Character)
  - Judas (Achievement)

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What unlocking Curved Horn leads to

Source: bindingofisaacrebirth.wiki.gg

Imported 2026-09-13