???'s Only Friend
AchievementRebirthUnlock unknown
Achievement details
- Achievement number
- 114
- Description
- Unlocked a new item.
- Requirement
- Complete the Boss Rush as ???
How do you unlock ???'s Only Friend?
In The Binding of Isaac, ???'s Only Friend is unlocked by earning the Boss Rush completion mark as ??? (Character).
Structured pathSource-backed requirements are mapped into trackable steps.
Unlocked a new item.
What unlocking ???'s Only Friend leads to
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13