Stem Cell
AchievementAfterbirth+Unlock unknown
Achievement details
- Achievement number
- 301
- Description
- Unlocked a new item.
- Requirement
- Defeat Ultra Greedier as Samson
How do you unlock Stem Cell?
In The Binding of Isaac, Stem Cell is unlocked by earning the Ultra Greedier completion mark as Samson (Character) on hard mode.
Structured pathSource-backed requirements are mapped into trackable steps.
Unlocked a new item.
How to unlock: Complete 2 floors in a row without taking damage
What unlocking Stem Cell leads to
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13