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Isaac's Tomb

ItemRepentanceLocked

passiveGame ID 701★★★★

How do you unlock Isaac's Tomb?

In The Binding of Isaac, Isaac's Tomb is unlocked by earning the The Beast completion mark as Tainted Forgotten.

Structured pathSource-backed requirements are mapped into trackable steps.

Spawns an Old Chest at the start of each floor.

Isaac's Tomb (Achievement)
- Tainted Forgotten → The Beast (normal)
  1. A Strange Door is unlocked by beating Mother for the first time. source
  2. Take The Polaroid or The Negative after Mom, escape the boss room, then use it to open A Strange Door. source
  3. Find Dad's Note, complete the Ascent to Home, then defeat Dogma, the Ultra Harbingers, and The Beast. source
  - Tainted Forgotten

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What unlocking Isaac's Tomb leads to

Nothing depends on this yet.

Source: bindingofisaacrebirth.wiki.gg

Imported 2026-09-13