Mom's Knife
AchievementRebirthUnlock unknown
Achievement details
- Achievement number
- 43
- Description
- Unlocked a new item.
- Requirement
- Defeat Satan as Isaac
How do you unlock Mom's Knife?
In The Binding of Isaac, Mom's Knife is unlocked by earning the Satan completion mark as Isaac (Character).
Structured pathSource-backed requirements are mapped into trackable steps.
Unlocked a new item.
What unlocking Mom's Knife leads to
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13