Black Sack
AchievementRepentanceUnlock unknown
Achievement details
- Achievement number
- 604
- Description
- ???
- Requirement
- Defeat Mega Satan as Tainted Judas
How do you unlock Black Sack?
In The Binding of Isaac, Black Sack is unlocked by earning the Mega Satan completion mark as Tainted Judas.
Structured pathSource-backed requirements are mapped into trackable steps.
???
- ??? or The Lamb must be defeated once for the Golden Gate to spawn. source
- Open the Golden Gate by combining Key Piece 1 and Key Piece 2 into the Golden Key, or by using Dad's Key or another gate-opening effect. source
- Reach the starting room of Chest or Dark Room, pass through the Golden Gate, and defeat Mega Satan. source
How to unlock: Use Red Key (etc.) to open the hidden closet in Home as Judas
What unlocking Black Sack leads to
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13