Lost Baby
AchievementRebirthUnlock unknown
Achievement details
- Achievement number
- 167
- Description
- Unlocked a new co-player baby.
- Requirement
- Defeat Mom's Heart or It Lives! on Hard mode as Isaac
How do you unlock Lost Baby?
In The Binding of Isaac, Lost Baby is unlocked by earning the Mom's Heart or It Lives! completion mark as Isaac (Character) on hard mode.
Structured pathSource-backed requirements are mapped into trackable steps.
Unlocked a new co-player baby.
What unlocking Lost Baby leads to
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13