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Keeper's Sack

AchievementRepentanceUnlock unknown

Achievement details

Achievement number: 464
Description: Complete the Corpse with Keeper.
Requirement: Defeat Mother as Keeper

How do you unlock Keeper's Sack?

In The Binding of Isaac, Keeper's Sack is unlocked by earning the Mother completion mark as Keeper (Character).

Structured pathSource-backed requirements are mapped into trackable steps.

Complete the Corpse with Keeper.

Keeper (Character) → Mother (normal)
1. Defeat Hush 3 times to unlock A Secret Exit. source
2. After A Secret Exit is unlocked, a locked door to Downpour appears after completing Basement/Cellar/Burning Basement I or II. source
3. Collect Knife Piece 1 in Downpour/Dross II. source
4. Collect Knife Piece 2 in Mines/Ashpit II. source
5. After defeating Mom in Mausoleum/Gehenna II, stab the flesh door that appears with the knife familiar to open it. source
6. Defeat the Mausoleum version of Mom's Heart behind the flesh door, then reach Corpse II and defeat Mother. source
- Keeper (Character)
  - Keeper (Achievement)

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What unlocking Keeper's Sack leads to

Source: bindingofisaacrebirth.wiki.gg

Imported 2026-09-13