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Montezuma's Revenge

AchievementRepentanceUnlock unknown

Achievement details

Achievement number: 449
Description: Complete the final chapter with ???.
Requirement: Defeat The Beast as ???

How do you unlock Montezuma's Revenge?

In The Binding of Isaac, Montezuma's Revenge is unlocked by earning the The Beast completion mark as ??? (Character).

Structured pathSource-backed requirements are mapped into trackable steps.

Complete the final chapter with ???.

??? (Character) → 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
- ??? (Character)
  - ??? (Achievement)

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What unlocking Montezuma's Revenge leads to

Source: bindingofisaacrebirth.wiki.gg

Imported 2026-09-13