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Worm Friend

AchievementRepentanceUnlock unknown

Achievement details

Achievement number: 467
Description: Complete the final chapter with Apollyon.
Requirement: Defeat The Beast as Apollyon

How do you unlock Worm Friend?

In The Binding of Isaac, Worm Friend is unlocked by earning the The Beast completion mark as Apollyon (Character).

Structured pathSource-backed requirements are mapped into trackable steps.

Complete the final chapter with Apollyon.

Apollyon (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
- Apollyon (Character)
  - Apollyon (Achievement)

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What unlocking Worm Friend leads to

Source: bindingofisaacrebirth.wiki.gg

Imported 2026-09-13